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Патент USA US3090654

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May 21, 1963
E. J. H. FlALA ETAL
3,090,644
DOOR LOCK
Filed Oct. 18, 1961
3 Sheets-Sheet 1
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May 21, 1963
E. J. H. FIALA ETAL
3,090,644
DOOR LOCK
Filed Oct. 18, 1961
3 Sheets-Sheet 2
H6. 2
INVEN TOR?.
ERNST F IALA
BY
ELMAR KAFKA
A TTORNE Y5.
May 21, 1963
3,090,644
E. J. H. FIALA ETAL
DOOR LOCK
Filed Oct. 18, 1961
5 Sheets-Sheet 3
INVENTORS.
ERNST FIALA
BY
-
ELMAR KAFKA
MMCZ?
A TTORNE YS.
tare
tea
7
Patented May 21, 1963
1
2
3,090,6d4
mutually adjustable latching members serves, as addi
tional means to the hydraulic auxiliary force, to enable
DQOR 196K
closing and latching of the door even in :case of failure
of the hydraulic pressure system. The ‘additional latch
ing can take place, for example, by means of mechanical
latching pawls in such a manner that a latching pawl is
inserted between the latching member and the shifting
Filed Oct. 18, 1%1, Ser. No. 145,818
Claims priority, application Germany Get. 19, 1969
member which is adapted to engage into a detent step of
the latching member and which, by actuation of the
tllairns. (Q. 292-229)
10 shifting member, may be disengaged from this detent step.
The present invention relates to a closure mechanism
Accordingly, it is an object of the present invention to
provided with a latching device, for lids, doors, etc., espe
provide a closure and latching mechanism in which clos
Ernst J. H. Fiala, Sindeltingen, Kreis Bcblingen, and
Elmer Kafka, Esslingen (Ne Paar), Germany, assignors
to Daimler-Benz Aktiengeselisehait, Etuttgart-Unter
turlrheim, Germany
cially for motor vehicles having a pivotal sll'fting member
which is actuated mechanically, pneumatically or electro
magnetically and with a pivotal latching member which
is actuated hydraulically.
With closure devices of this type there is released by
the use of a relatively small amount of force, for example,
by ?nger pressure, an auxiliary force by means of which
takes place the latching and unlatching, for example, of
doors of busses. The present invention is based on the
underlying problem to create a relatively inexpensive,
uncomplicated and safe closure and latching unit in which
the door closing and latching takes place hydraulically.
ing and latching normally takes place automatically by
the use of an auxiliary force.
Another object of the present invention resides in the
provision of a closure and latching mechanism, especially
for vehicle doors, in which closing and opening thereof
can be realized by the use of a relatively small force
while the latching itself is realized by a large force.
Another object of the present invention resides in the
provision of a door latch, especially for motor vehicle
doors, in which the door, after being moved into a posi
tion in which the latching member abuts against the door
catch, is automatically closed and latched whereby closing
and latching as well as reopening takes place completely
In accordance with the present invention, the vehicle
door is adapted to be closed and opened noiselessly and
noiselessly.
with a very small amount of force Whereas the latching
itself is to ‘be assured by a relatively large ‘force or block
Still a further object of the present invention resides in
the provision of a closure and latching mechanism, espe
ing effect.
cially for a motor vehicle door, in which an auxiliary force
The problem is solved in accordance with the present 30 actuated by a ?uid pressure medium is utilized to effect
invention by pivotally connecting at the latch member a
closing and latching of the door in a completely automatic
hydraulic adjusting motor and a spring in such a manner
manner after bringing the door into a position of slight
that the spring forces the latching member into the posi
abutment with the door catch in which such automatic
tion opening the door in which the hydraulic adjusting
closure and latching means is automatically rendered
motor is in the dead~center position with respect to the 35 operative.
pivot point of the latch member and that the hydraulic
Still another object of the present invention resides in
adjusting motor is moved out of the dead center position
the provision of a hydraulically actuated door closure and
thereof by abutment of the latching member at the door
latching means which is so constructed and arranged that
catch and thereby forces the latch member against the
the door may be ‘closed and latched even in case of failure
force of the spring into the position thereof in which it
of the hydraulic system.
closes and latches the door, and that upon actuation of
A further object of the present invention resides in the
the shifting member the latching is rendered inoperative
provision of a door latch system of the type described
and the latch member assumes the position thereof open
hereinabove which is simple in construction, safe in oper
ing the door and that additional means are provided in
ation and relatively inexpensive in manufacture, assembly
order to enable closing and latching of the door also in 45 and service.
case of failure of the hydraulic system.
Another object ‘of the present invention resides in the
There is produced by such a construction of the closure
provision of a door closing and latching mechanism espe
and latching unit a door closure and latching system hav
cially ‘for passenger motor vehicles which greatly facilities
ing a hydraulic as well as a mechanical actuation so that
‘closing of the door on the part of a passenger seated
also in case of failure of the hydraulic pressure the door 50 within the vehicle by making available an auxiliary closing
may be closed and latched.
and latching force which is rendered effective automati
The auxiliary ‘force, already with a slight abutment of
cally when the door is brought into a position in which
the latching member secured at the door against the door
such auxiliary force can become effective.
catch secured at the vehicle body, causes the door to close
Still another object of the present invention resides in
forcibly by means of the adjusting motor and thereupon 55 the provision of a door closure and latching mechanism
automatically latches the same. This closing of the door
which effectively protects the door hinges as Well as the
by an auxiliary force is particularly advantageous with
doors and vehicle body against damage and wear caused,
passenger motor vemcles since it represents a signi?cant
for example, by slamming of the door.
and substantial facilitation when a passenger seated within
Still a ‘further object of the present invention resides in
the vehicle desires to close the door and only needs to pull 60 the provision of a door closure and latching mechanism
the door slightly toward him. The slamming of the door
in which a force locking connection between vehicle body
which is damaging to the door hinges as well as to the
door and to the body is thereby completely eliminated.
The door lock with the latching mechanism according to
the present invention represents a signi?cant contribution
and door is established thereby eliminating rthe rattling
noises caused by an excessively large play that occurs
frequently in the prior art form-locking constructions.
These and other objects, features and advantages of the
to the present day desire to offer to the driver as large as
present invention will become- more ‘obvious from the
possible a driving comfort and safety. A force-locking
‘following description when taken in connection with the
connection between body and door is established by the
accompanying drawing which shows, for purposes of illus
hydraulic latching so that all rattling noises which have
their origin in an excessive play with the usual prior art 70 tration only, several embodiments in accordance with
form-locking connections are obviated.
the present invention, and wherein
The construction of the door latch and door catch as
FIGURE 1 is an elevational view of a closure and latch—
‘
7
3,090,644
3
ing unit in accordance with the present invention as seen
in the plane of the door cross section;
FIGURE 2 is a side elevational View of the closure
and latching unit of FIGURE 1;
‘FIGURE 3 is an elevational view in the same plane
as FIGURE 1 of a modi?ed embodiment of a closure and
latching unit in accordance with the present invention;
FIGURE 4 is a partial side View. of the unit of FIGURE
3, and
FIGURE 5 is a partial plan view of the closure and
latching unit of FIGURE 3.
the third arm 42 of the shifting member 27.
A spring
loaded latching pawl 35 which is pivotally supported
about a bearing bolt 35 secured in the base plate 18 is
arranged between the shifting member 27 and the latch
member 5. The latching pawl 35 comes into abutment,
pretensioned by the spring 37, against the latch member
5.
The latch member 5 is provided with a detent step or
notch 3-5 for the latching pawl 35'. By reason of the pin
4% secured at the shifting member 27, the latching pawl
35, upon swinging of the shifting member 27 in the coun
terclockwise direction, is also pivoted in the counterclock
wise direction and the nose portion 49 of the latching pawl
Referring now to the drawing wherein like reference
35' is thereby moved out of the engaging area for the
numerals are used throughout the various views to desig
detent step 38.
_
,
i
,
,
j
nate corresponding parts, more particularly to ‘FIGURES
Operation
"
l and 2, reference numeral 1 generally designates therein 15 '
the closure and latching unit which is secured at the side
The operation of the closure and latching unit of FIG
panel of the door 3 by any suitable means such as screwsyZ.
URES 1 and 2 in accordance with the present invention
The closure and latching unit may be acted upon by a
is as follows:
,
manual push button 4 arranged in the door handle 34 or
As shown in FIGURES l and 2, the door is in the
by a spring-loaded bell-crank 3t} operatively connected
with the interior door opening means as well as by a latch
ing member generally designated by reference numeral 5.
opened position thereof. The door catch 8 and door
latch 5 are out of engagement.
The piston 12 of the
adjusting motor ‘13, loaded by the pressure ?uid, exerts
The vehicle body side wall 7 together with the door catch 3
a force on the bolt 11, however, without producing a
secured at the body is indicated in FIGURE 1 next to the
moment on the latch member 5 so that the latch member
sidewall 6 of the door facing the vehicle interior space. 25 5 is not pivoted or swung thereby. The pressure ?uid
In FIGURE 1, the door 3 is placed lightly against the
acts on the piston 12 through the line 22, shifting or switch
vehicle body and the latch member 5 and the catch are
ing mechanism ‘21 and line 19. If, in this opened door
in contact with each other. The latching member 5 is
position, the manual push button 4 at the outer door handle
brought into abutment against the adjusting screw 16 with
is actuated or the bell crank 31} is actuated through the
the nose '51 thereof by‘ means of spring 9. The latch
inner door handle, then only the shifting mechanism 221 is
member 5 is a three-armed lever and is piyotally support
alternately actuated. Consequently, under these conditions
ed about the bearing bolt 11 secured to the base plate '18.
of manual actuation, the piston '12 of the adjusting motor
The piston 12 of the adjusting motor generally designated
'13 is alternately subjected to ?uid pressure or relieved
by reference numeral 13 is secured on one side thereof by
therefrom. The closure and latching operation, however,
a pivotal connection 14 at the latching member 5 and on 35 is not initiated alone by such actuation. If, however,
the other side thereof is arranged axially slidable within
the door 3 is moved in the direction against the door catch
the cylinder 15 of the adjusting motor 13. The cylinder
s, i.e., if the door is to be closed, then the latch member 5
15 is secured by a pivotal connection 16 at a lug portion
comes into abutment against the door catch 8. As a
'17 of the base plate 18. The latch member 5 is brought
result thereo?the latch member 5 slides slightly upwardly
into abutment by the adjusting screw 10 in such a manner 40 along the track 43 of the door catch 8 and is rotated in
that the axis of the adjusting motor 13 passes through
a clockwise direction against the force of spring 9 where
the pivot point of the bearing bolt support 11 whereby the
by the axis of the adjusting motor ‘13 no longer passes
latch member 5 cannot be actuated with the piston 12
through the support of the bolt 11. The piston 12 of
acted upon by the pressure medium. The line 19 of the
the adjusting motor 13 which is loaded by pressure ?uid
hydraulic auxiliary force is connected to the nipple 21) at
now rotates the latch member '5 in a clockwise direction
the cylinder 15. This line 119 terminates within a hydrau
and the arm 47 of the latch member 5 slides, along the
lic switching or shifting device generally designated by
reference numeral 21. The shifting device 21 is also
secured on the base plate 18.
The line 19 may be selec
tively connected by means of the hydraulic shifting mech
anism 21 with a line 22, through which the pressure ?uid
is supplied to the adjusting motor 13, and with a line 23
through which the pressure ?uid medium can’ be dis
charged from and ?ow out of the adjusting motor 13.
track 43 of the door catch 8 into the pocket or recess
48 and therewith closes and latches the door 3. It there
fore suffices, in order to close and latch the door, if the
door is placed with a very slight pressure against the ve
hicle body. Consequently, the adjusting motor 13 acting
on the latch member 5 forces the door into closing without
any further manipulation. The door is retained in the
latched position thereof by the piston 12 which, during
The shifting mechanism 21 is mechanically shifted by the 55 latching, is loaded by the pressure ?uid supplied through
lever 24 over shifting pins 53 and 55. In the position
line 22. If the door is to be opened, either from the
illustrated in FIGURE 1, the shifting member 21 is so
shifted by means of the shifting pin 53 that the piston '12
of the adjusting motor '13 is loaded by the pressure ?uid.
The lever ‘24. is ,pivotally arranged about the bearing bolt
25 within the shifting mechanism 21 and is pivotable as
well as displaceable within an elongated aperture 26 pro
vided within the arm 46 of the shifting member 27. The
shifting member 27 is also a three-armed lever which is
pivotally supported about the bearing bolt 28 secured in
the base plate 18, The shifting member 27 is brought
into abutment with the arm 50 thereof against the knee
outside or from the vehicle interior space, then the manual
push button 4- is pressed in or the bell crank 30 is rotated
in the clockwise direction by a linkage, not illustrated in
the drawing, which engages with the bell crank 36' at the
pivotal connection 45.
As a result thereof, the shifting member is rotated in
the counterclockwise direction against the force of spring
29 and shifts with the arm 45 thereof through lever 24 the
shifting mechanism 21 in such a manner that the pressure
?uid can flow out of the adjusting motor 13 through the
line 19 and the shifting mechanism 21 into the discharge
line 23. The adjusting motor 13 thereby becomes pres
sureless. The spring '9 swings the latch member 5 again
bolt 33 secured in the angularly-bent rim portion of the 70 into the position thereof shown in FIGURE 1 and the,
base plate 18 and is brought into abutment against the
door is opened thereby. If, for any reason, the adjusting '
latch pocket 44 by a pre-stressed spring 41. The spring
motor 13 should fail, i.e., the piston 12 of the adjusting
29 is arranged at the connecting point 311 on the shifting
motor 13 can no longer be loaded by pressure ?uid, then
member 27 and through the connecting point 54- is sup
the closing of the door 3 takes place in the manner that by
ported over a knee portion or projection 32 at the base
pushing or slamming the door 3, the arm 47 of the latch
plate 18. The manually actuated push button 4 acts on
portion or projection of the bell crank 30 by the spring 29.
The bell crank'fiil is pivotally supported about the bearing
or
3,090,644
5
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member 5 slides along the track 43 of the catch 8 into the
pocket 48. The latch member 5 is retained in this posi
tion in which the door is closed by the latching pawl 35.
in which the lever 24' secured at the shifting member 27'
acts on the shifting pin 55' of the shifting mechanism 21'
The latching pawl 35 slides along the detent step 38 during
whereby the points of connection 25’, 31’ and 54' not yet
shifting position for the shifting mechanism 21’ is reached
swinging of the latch member 5 and thereby engages the
lie in a straight line, i.e., in a dead center position for
the force of a spring 29'. If, however, the shifting mem
i.e., upon actuation of the manual push button 4 or of
ber 27’ is rotated further, then the connecting point 31’
the bell crank 3-9, the latching pawl 35 is swung in the
arrives at ?rst in the line of connection of the connecting
counterclockwise direction out of the detent step 38 by
points 25' and 54’, .and thereupon comes to lie on the left
the pin 40 secured .at the shifting member 27, and the 10 side of this connecting line. The force of the spring 2?’
spring 9 can thereupon return the latch member 5 back
now acts in addition to the actuating force against the
into the door opening position shown in the drawing.
resistance of the shifting pin 55’ of the shifting mecha
detent provided therefor. During opening of the door,
The detent step or notch 38 is so arranged at the latch
nism ‘21'. The actuation of the closure and latch unit
member 5 that with a hydraulic closing and latching of
takes place as a result thereof with a slight amount of
the door 3, the nose portion 49 of the latching pawl 35 15 force. If the shifting member 27' is no longer actuated,
is not supported in the corner of the latching step or
then the shifting member 27’ is rotated in the counter
detent 38 so that during opening of the door the latching
clockwise direction by the resistance of the shifting pin
pawl 35 only has to be pivoted against the small force of
55’, and more particularly through the dead center posi
the spring 37. In order to avoid the snap-in noise which
tion for the force of the spring, i.e., until the connecting
occurs during engagement of the latching pawl 35 in the 20 point 31’ is again disposed toward the right of the line
detent step 33 during closure of the door, the pin 49 is
connecting the connecting points 25' and 54’. The further
advantageously covered with any suitable elastic ma
pivoting of the shifting member 27’ is then realized by
terial and the latching pawl 35 is not permitted to im
the force of the spring 29'.
pinge against the bottom or base of the detent step 38.
While we have shown and described two embodiments
The closure and latching unit in accordance with the 25 in accordance with the present invention, it is understood
present invention may be locked by any suitable known
that the same is not limited thereto, but is susceptible of
locking means in or operatively associated with the push
many changes and modi?cations within the spirit and
button 4 whereby the shifting member 27 can no longer
scope thereof, and we therefore do not wish to be limited
be actuated. The closure and latching unit may also be
to the details shown and described herein, but intend to
locked, however, by the fact that by means, not illustrated
cover all such changes and modifications as are encom
herein, the discharge path through line 19 and through
passed by the scope of the appended claims.
the shifting mechanism 21 as Well as through the discharge
line 23 is closed off in any suitable place. As a result
thereof, notwithstanding actuation of the shifting mem
We claim:
1. A closure mechanism provided with latching means
for lids, doors and the like, especially for motor vehicle
ber 27, the pressure ?uid can no longer escape from the 35
doors, comprising pivotal shifting means, hydraulically
adjusting motor 13.
actuated pivotally arranged latch means, catch means for
said latch means, hydraulic adjusting means, spring
FIGURES 3 to 5 show a further embodiment of the
door closing and latching mechanism in accordance with
means, means operatively connecting said adjusting means
the present invention.
and said spring means with said latch means in such a
Those parts of FIGUPTS 3—5 which correspond to 40 manner that said spring means normally forces said latch
similar parts in FIGURES 1 and 2 are designated with
means into the door opening position thereof in which
corresponding reference numerals with prime marks
said hydraulic adjusting means is in the dead center posi
added, The closure and latch unit is illustrated in PEG
tion with respect to the pivot point of said latch means
URES 3 to 5 with a closed vehicle door. The lever 24'
and that said hydraulic adjusting means is moved out of
for the actuation of the shifting mechanism 21’ is thereby 45 the dead center position thereof by abutment of said
rigidly connected with the shifting member 27' so that the
latch means at said catch means and thereby forces said
lever 24' and shifting member 27’ are supported together
latch means against the force of said spring means into
on the bearing bolt 25' in the shifting mechanism 21'.
the door closing and latching position thereof, and means
The latch member 5’ and the door catch 8' cooperate as
operative upon actuation of said shifting means for
in FIGURE 1 only that the pocket or recess 4-8’ is formed 50 rendering said latch means inoperative and for returning
in this embodiment by the latching member 5’ and the arm
said latch means into the door-opening position thereof,
sliding into the pocket 43’ is formed by a part of the door
and additional means to enable closing and latching of
catch 8'. The spring 9’ and the adjusting motor 13’ are
pivotally secured at the same point 14' at the latch mem
The conical pin 52' secured in the door catch 55
said door in case of failure of said hydraulic adjusting
means.
pocket 44’ serves in a manner known per se for the guid
2. A closure mechanism provided with latching
means for lids, doors and the like, especially for motor
ance of the door within the door aperture of the vehicle
body and provides a support of the door in the vehicle
vehicle doors, comprising pivotal shifting means, hy
draulically actuated pivotally arranged latch means, catch
longitudinal direction with respect to the vehicle body.
means for said latch means, hydraulic adjusting means,
ber 5’.
The pin 49' provided with an elastic cover material is 60 spring means, means operatively connecting said adjust
arranged in this embodiment at the latching pawl 35'.
ing means and said spring means with said latch means
The lug 32’ is adjustable in the transverse direction so
in such a manner that said spring means normally forces
that the position of the connecting point 54’ of the spring
29’ is adjustable relative to the connecting point 25’ of
the shifting member 27’. The connecting point 54’ is so
located that in the illustrated position, that is, with a
non-actuated shifting member 27’, the connecting point
said latch means into the door opening position thereof
in which said hydraulic adjusting means is in the dead
center position with respect to the pivot point of said
latch means and that said hydraulic adjusting means is
moved out of the dead center position thereof by abut
31' is disposed toward the right outside of the line of con
ment of said latch means at said catch means and thereby
nection between the connecting points 54’ and 25' so that
forces said latch means against the force of said spring
the shifting member 27 ', with a non-actuated manual push 70 means into the door closing and latching position there
button 4-’ or bell crank 3%’, is always in the position
of, means operative upon actuation of said shifting means
illustrated in the drawing in which it actuates the shifting
for rendering said latch means inoperative and for re
mechanism 21' by means of the shifting pin 53’. If the
turning said latch means into the door-opening position,
shifting member 27’ is actuated, that is, if the shifting
member 27' is rotated in the clockwise direction, then a
and additional means to enable closing and latching of
said door in case of failure of said hydraulic adjusting
3,090,644
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means including latching pawl means between said shift
moved out of the dead center position thereof by abut
ing means and said latch means and adapted to engage
ment of said latch means at said catch means and thereby
a detent provided within said latch means, said latching
pawl means being effectively disengaged from said detent
forces said latch means against the force of said spring
means into the door closing and latching position there
of, means operative upon actuation of said shifting means
upon actuation of said shifting means.
3. A closure mechanism provided with latching means,
comprising pivotal shifting means, hydraulically actuated
pivotally arranged latch means, catch means for said
latch means, hydraulic adjusting means, spring means,
means operatively connecting said adjusting means and
said spring means with said latch means in such a manner
that said spring means normally forces said latch means
into the door opening position thereof in which said hy
draulic adjusting means is in an ine?ectual position there
for rendering said latch means inoperative and for re
turning said latch means into the door-opening position,
and additional means to enable closing and latching of
said door in case of failure or" said hydraulic adjusting
means including latching pawl means between said shift
ing means and said latch means and adapted to engage
a detent provided within said latch means, said latching
pawl means being effectively disengaged from said detent
upon actuation of said shifting means, further spring,
. of and that said hydraulic adjusting means is moved out 15 means for retaining said shifting means in one end posi
of said ine?ectual position thereof by abutment of said
latch means at said catch means and thereby forces said
latch means against the force of said spring means into
tion thereof in which said latching pawl means is adapted
to be eifectuahsaid shifting means being operatively asso
ciated in said last-mentioned one end position with said
hydraulic shifting mechanism in such a manner that said
the door closing and latching position thereof, and means
operative upon actuation of said shifting means for 20 hydraulic shifting mechanism causes said hydraulic ad
justing means to be subjected, to the pressure of the ?uid
rendering said latch means inoperative and for returning
pressure medium, and said hydraulic shifting mechanism
said latching means into the door-opening position
being brought into the other end position thereof upon
thereof.
actuation of said shifting means against the force of said
4. A closure mechanism provided with latching means
further spring means to enable discharge of the ?uid
for lids, doors and the like, especially for motor vehicle
doors, comprising pivotal shifting means, hydraulically
pressure medium from said adjusting means.
actuated pivotally arranged latch means, catch means for
7. A closure mechanism for lids, doors andthe like,
said latch means, hydraulic adjusting means, spring
especially for motor vehicle doors, comprising hydrau
lically actuated pivotally arranged latch means, catch
means, means operatively connecting said adjusting means
and said spring means with said latch means in such a 30 means for said latch means, hydraulic adjusting means,
spring means, and means operatively connecting said ad
manner that said spring means normally forces said latch
justing means and said’ spring means with said latch
means into the door opening position thereof in which
means in such a manner that said spring means forces
said hydraulic adjusting means is in an ineffectual posi
said latch means into the door opening position thereof in
tion thereof and that said hydraulic adjusting means is
which said hydraulic adjusting means is effectively'in
moved out of said ineffectual position thereof by abut
operative and that said hydraulic adjusting means is auto
ment of said latch means at said catch means and thereby
matically rendered effective by abutment of said latch
forces said latch means against the force of said spring
means at said catch means to thereby force said latch
means into the door closing and latching position thereof,
and means operative upon actuation of said shifting
means against the force of said spring means into the
especially for motor vehicle doors, comprising hydrau
two shifting positions, pivotal shifting means, hydrauli
lically actuated pivotally arranged latch means, catch
cally actuated pivotally arranged latch means, catch means
for said latch means, hydraulic adjusting means, spring
means for rendering said latch means inoperative and 40 door closing and latching position thereof, and manually
operated means operative for returning said latch means
for returning said latch means into the door-opening posi
into said effectively inoperative position.
tion thereof, and additional means to enable closing and
8. A closure mechanism provided with latching means
latching of said door in case of failure of said hydraulic
for lids, doors and the like, especially for motor vehicle
adjusting means.
5. A closure mechanism for lids, doors and the like, 45 doors, comprising a hydraulic shifting mechanism having
means for said latch means, hydraulic adjusting means,
spring means, and means operatively connecting said 50 means, means operatively connecting said adjusting means.
and said spring means with said latch means in such a
adjusting means and said spring means with said latch
means in such a manner that said spring means forces
manner that said spring means normally forces said latch
means into the door opening position thereof in which
said latch means into the door opening position thereof
said hydraulic adjusting means is in an effectively in
‘in which sm'd hydraulic adjusting means is effectively
inoperative and that said hydraulic adjusting means is 55 operative center position wi-th respect to the pivot point
of said latch means and that said hydraulic adjusting
automatically rendered effective by abutment of said
means is moved out of the e?ectively inoperative position
latch means at said catch means to thereby force said
latch means against the force of said spring means into
,the door closing and latching position thereof, manually
operated means operative for returning said latch means
into said effectively inoperative position, and additional
thereof by abutment of said latch means at said catch
means and thereby forces said latch means against the
force of said spring means into the door closing and latch
ing position thereof, means operative upon actuation of
said shifting means for rendering said latch means in
means to enable closinl7 and latching of said door in case
operative and for returning said latch means into the
of failure of said hydraulic adjusting means.
door-opening position, and additional means to'enable
6. A c‘iosure mechanism provided with latching means
for lids, doors and the like, especially for motor vehicle 65 closing and latching of said door in case of failure of said
hydraulic adjusting means including latching pawl means
doors, comprising a hydraulic shifting mechanism hav
between said shifting means and said latch means and
ing two shifting positions, pivotal shifting means, hydrau
adapted to engage a detent provided within said latch
lically actuated pivotally arranged latch means, catch
means, said latching pawl means being effectively dis
means for said latch means, hydraulic adjusting means,
engaged from said detent upon actuation of said shifting
spring means, means operatively connecting said adjusting
means, further spring means for retaining said shifting
means and said spring means with said latch means in
means in one end position thereof in which said latching
such a manner that said spring means normally forces
pawl means is adapted to be effectual, said shifting means
said latch means into the door opening position thereof
being operatively associated in said last-mentioned one
in which said hydraulic adjusting means is in the dead
center position with respect to the pivot point of said
end position with said hydraulic shifting mechanism in
latch means and that said hydraulic adjusting means is
such a manner that said hydraulic shifting mechanism
3,090,644
10
causes said hydraulic adjusting means to be subjected to
‘the pressure of the ?uid pressure medium, and said hy
means against the force of said spring means into the door
draulic shifting mechanism being brought into the other
upon actuation of said shifting means for rendering said
latch means inoperative and for returning said latch
means into the door-opening position, and additional
end position thereof upon actuation of said shifting means
against the force of said further spring means to enable
discharge of the ?uid pressure medium from said adjust
ing means.
9. A closure mechanism provided with latching means
for lids, doors and the like, especially for motor vehicle
closing and latching position thereof, means operative
means ‘to enable closing and latching of said door in case
of failure of said hydraulic adjusting means including
latching pawl means between said shifting means and said
latch means and adapted to engage a detent provided with
doors, comprising pivotal shifting means, hydraulically 10 in said latch means, said latching pawl means being effec
actuated pivotally arranged latch means, catch means for
tively disengaged from said detent upon actuation of said
said latch means, hydraulic adjusting means, spring means,
shifting means.
means operatively connecting said adjusting means and
References Cited in the ?le of this patent
said spring means with said latch means in such a manner
UNITED STATES PATENTS
that said spring means normally forces said latch means
into the door opening position thereof in which said hy
draulic adjusting means is in the dead center position
with respect to the pivot point of said latch means and
that said hydraulic adjusting means is moved out of the
dead center position thereof by abutment of said latch
means at said catch means and thereby forces said latch
1,874,482
2,601,983
2,896,990
2,898,138
Forman ______________ __ Aug. 30,
Schoelkopf _____________ __ July 1,
Garvey et al ___________ __ July 28,
Van Noord ____________ __ Aug. 4,
1932
1953
1959
1959
2,910,318
Masur _______________ __ Oct. 27, 1959
2,950,138
Meyer et al ___________ __ Aug. 23, 1960
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