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Патент USA US3094361

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June 18, 1963
3,094,352
w. M. MAY
VEHICLE CAB DOOR LATCH HANDLE AND MECHANISM‘
Filed Aug. 14. 1961
FIG.2.
INVENTOR
WALTER M. MAY
BY
W?
1
»L
H IS ATTORN EYS
IE]:
ice
1
3,094,352
VEHELE CAB DOOR LATCH HANDLE
AND MECHANISM
Walter M. May, Allentown, Pa., ‘assignor to Mack Truths,
1116-, Plaintield, NJ, a corporation of New York
Filed Aug. 14, 1961, Ser. No. 131,381
3 Claims. (Cl. 296-44)
3,094,3'52
Patented June 18, 1963
2
from the inside, there is provided an inside door handle
disposed at about the same level as the catch means
and connected thereto by another linkage which causes
door-opening movement of such inside handle to retract
the catch means. The inside ‘and outside door handles
and the catch means may be linked together so that a
single spring may be employed to bias both handles
against door-opening movement.
This invention relates to locking-releasing apparatus
_ For a better understanding of the invention, reference
for the doors of motor vehicles. More particularly, this 10 1s made to the following description and to the accom
invention relates to apparatus of such sort which is spe
panying drawings wherein:
cially adapted for use with the cab doors of trucks having
FIGURE 1 is a schematic view of the right-hand side
cabs which are several feet above the ground.
of a truck incorporating a representative embodiment of
In order to enter the door of such a cab, it is ?rst
the invention; and
necessary ‘for the driver to hoist himself to the cab level.
FIG. 2 is a schematic view (looking in the direction
Truck manufacturers have intended that the driver do this
from outside the cab towards the interior thereof) of
by pulling himself up with the aid of a stationary “grab”
the inside of the panel for the left~hand door of the truck
handle a?ixed to the outside of the cab at a position well
of FIG. 1.
above the bot-tom of the door and adjacent to the un—
Referring now to FIG. 1, the reference numeral 10
hinged vertical margin thereof. The reason for supplying 20 generally designates a truck having a cab 11 mounted
such grab handle has been to encourage truck drivers
over the right-hand and left-hand front tires 12, 12' at a
not to lift themselves up by the outside door handle which
height too great for a driver merely to step into the cab.
is easily broken by the placing thereon of too great a
The cab 11 may be entered through either of right-hand
weight. It has been found, however, that, because in the
and left-hand forwardly hinged doors of which the right
past the door handle has been positioned to provide a 25 hand door 13 is shown in FIG. 1. Such door is, as
convenient alternative to the grab handle for self-hoisting
usual, comprised of a lower panel 14, an upper, rearward,
purposes, there has been a tendency on the part of truck
vertically movable window ‘15, an upper, forward, angu
drivers to lift themselves by the door handle rather than
larly movable vent window 16, and a frame 17 for the
the grab handle, and that a large number of door handle
windows. The left-hand door is constructed of similar
30 elements of which those shown in FIGURE 2 will be
breakages have thereby resulted.
It is, accordingly, an object of the invention to mini
designated herein by prime reference numerals in order
mize the breakage of the outside handles on the doors
to distinguish such left-hand elements from their counter
of high-mounted truck cabs.
parts in the right-hand door 13.
A further object of the invention is to facilitate the
Secured to the underside of cab 11 and rearwardly
opening from the outside of the doors for such cabs.
‘of right~hand tire 12 is an L-bracket 20 having a down
Another object of the invention is to permit the locking
wardly extending leg 21 land a rearwardly extending leg
and releasing of a motor vehicle door by the action of
22, the latter leg providing a step. Also secured to the
an outside door handle at a different vertical level than
outside of cab 11 above step 22 is a stationary grab handle
the latch mechanism for the door.
25 disposed adjacent the unhinged, rear vertical margin
Yet another object of the invention is to permit such 4:0 26 of door 13 at a position opposite the upper left-hand
locking and releasing to be accomplished by either the
corner of panel ‘14 and at a vertical location about half
action of such outside handle or by the action of an
way between the bottom 27 and the top ‘28 of the door.
inside door handle at a different horizontal and vertical
A similar bracket (not shown) and a similar grab handle
location than the outside handle.
25' (FIG. 2) are secured to the left-hand side of the truck.
These and other objects are realized in accordance with 45
The door 13 may be unlatched by depression of an out
the invention by providing for the door of a high-mounted
side door handle 3t} positioned at the lower left~hand cor
truck cab an outside door handle positioned sufficiently
ner of panel M to be adjacent both the bottom 27 of
near the bottom of the door to allow a driver outside
such door and the unhinged vertical margin 26 thereof.
the cab to open such door without stretching. At the
As is evident from FIG. 1, the handle 39 may be reached
same time the position of the handle denies the driver
without stretching by a driver standing on the ground.
any purchase by which he can elevate himself to the
At the same time, the handle 3%} is sufficiently close to the
height necessary to enter the cab through the door
door bottom 27 that such driver cannot lift himself by
opening.
that handle to a height sufficient to pass through the door
Supplied in conjunction with such door handle is a
55 way provided by door 13 when open.
grab handle which, as described, is mounted on the out
The just-described position of handle 30 accordingly
side of the cab adjacent to the unhinged vertical margin
forces a driver to enter cab 11 from the right-hand side
of the door to furnish a grasp by which the driver can
by the procedure of ?rst operating handle 30 to open the
hoist himself to the level of the door without using the
door 13, and by then utilizing the step 22 and the grab
door handle. Preferably but not necessarily, the door
handle 25 to raise himself to a height su?icient to pass
through the doorway. Since, by this procedure, the ban
is forwardly hinged so that the grab handle is to the
rear of the door. As another preferable but not neces
sary feature, the outside door handle is positioned hori~
zontally close to the grab handle, i.e., at a rearward
location on a fo1wardly hinged door.
When the outside handle is given a door-opening move
dle 39 is used for no purpose other than to open the door,
there is no occas'oin for a driver to place ‘great weight
thereon in the ‘course of depressing the handle. More
over, the handle 3&1 is at a sufficiently low position that a
65 driver on the ground would be inconvenienced in attempt
ment, such movement is communicated through a linkage
ing to load the handle (by his weight or muscular power)
to a catch means forming a part of a latch for the
with a force greater than that necessary to depress it.
Hence, the shown low position for the door handle 39
door and disposed (at the unhinged vertical margin there
of) in upwardly spaced relation from the outside handle. 70 results in elimination of the numerous break-ages thereof
which occurred when, as described, such handle was posi
In this manner, the cab door may be released for opening
from the outside of the cab. In order to open the door
tioned on the door at the level of and near to grab handle
3,094,352
3
[A
25. Also, such low position for the door handle elim
inates the inconvenience (accompanying the previously
used high position) of having to release and open the
door with one hand while being somewhat precariously
downward movement of the inside handle which unlatches
the door to permit it to be opened.
Still referring to FIG. 2, the portion of crank 56’ which
surrounds shaft d5’ has formed therein a shoulder 69'.
That shoulder as’ is engaged by the free end of a com
pression spring 61’ whose anchored end is maintained in
perched on the step 22.
Turning now to FIGURE 2, while it is the interior of
the left-hand panel :14’ which is shown thereby, such
?xed relation with the panel '14’. . The spring 61’ exerts
on the crank at a distance from shaft 55' a force which
?gure is also illustrative of the interior of the right hand
is manifested as a torque urging crank 56’ clockwise as
door panel 14 (FIG. 1) inasmuch as the two panels are
duplicates apart :from their left-‘hand and right-hand as 10 seen in FIG. '2, i.e. in .a rotational direction opposite to
pects.
'
the counterclockwise displacement given to inside handle
59' and crank 56' in order to release the door for opening.
Considering the details of the left-hand panel 14’, it has
at its unhinged, rearward, vertical margin 26" a conven
tional catch means 35’ which forms ‘one part of the latch
for the left-hand door. Such catch means includes (1)
a catch 36', (2) an assembly of parts forming a catch
holder 37', and (3) a retractor bar 38’ for the catch
holder. ‘The catch 36' maintains the door latched in
closed posit-ion by ?tting into' a recessed eatchway (not
shown) in the (frame surrounding the door, the catch
means and catchway together comprising the whole door
latch. As is usual, a spring ‘(not shown) in holder 37'
That ‘force or torque is communicated through the de
scribed horizontal linkage so as (a) to tend to maintain
inside handle 5%’ normally upward (against :an unshown
stop), and (b) to tend to maintain retractor bar 38’ and
the rest of catch means 35' rightward (against an unshown
stop). In other words, the spring 61.’ biases handle 50'
against door-opening movement and biases catch means
35' against being leftwardly retracted by such handle.
The described spring bias is imparted to the toggle
46' and to the pin 45’ of the vertical linkage. Hence, any
depression of outside handle 30' for door-opening pur
normally maintains catch 36’ outwards of the holder but
poses is a movement which has to operate (through the
is yieldable under a wedging action on catch 36' to allow
such action to force such catch into the holder. Thus, 25 described vertical linkage) against such bias as manifested
on pin 45'. This being so, it will be seen that, in addition
the catch means is of the sort which permits the ‘door to
to biasing inside handle 50" against door-opening move
be slammed closed ‘and then become self-latched.
ment, the spring '61’ operates through the horizontal link
From what has been said, it will be evident that the
age and then through the vertical linkage to also bias the
latch for the door is, in itself, conventional, the above
brief description of such latch having been given for 30 outside door handle 30’ against door-opening movement.
background only.
The outside handle 30" for the left-hand door is con
nected to the catch means 35’ by a linkage comprised of
While the vertical linkage is thus fully coupled to the
horizontal linkage for the purpose of transmitting a bias
ing force from the latter to the former and thence to the
the following elements: (1) a shaft 40' a?ixed to handle
30', (2) a crank 41’ af?xed to shaft 40’ ‘on the interior of .
outside handle 30’ (and, also as described, is fully coupled
to the retractor bar 38' for the purpose of transmitting
panel 14', (3) ‘a coupling pin 42’, (4) 1a link bar 43'
a door-opening movement from outside handle 30' to
coupled at its lower end by pin >42’ to crank 41', and hav
that bar), nonetheless, the vertical linkage is uncoupled
ing ‘formed in its upper end a lengthwise extending slot
by the pindand-slot, lost motion coupling 44', 45’ from the
horizontal linkage in the instance where that last named
'44’, (5) a pin '45’ riding in slot 44’, (6) a toggle 46’
carrying pin 45' at one end and pivoted at its center by 40 linkage is being used to transmit a door-opening move
a pin 47 ' mounted in ?xed relation with panel 14', and (7)
ment from inside handle 50' to the catch means 35’. Spe
a pin 4-8’ carried at the other end of the toggle to connect
ci?cally, when inside handle 50’ is rotated upwardly to
such toggle (with some play) to the retractor bar 38' of
pull retractor bar 38’ leftwardly, such leftward motion
the catch means 35'.
of bar 38' causes toggle 46’ to rotate counterclockwise (as
I For the normal linkage position shown in FIG. 2
‘(handle 30' being undepressed ‘and catch means 35' ac
cordingly unretracted), the pin 45’ of the linkage is dis
posed upwardly with-in slot 44! as far as the pin can go.
Therefore, any door-opening depression of handle 30' is
immediately communicated to retractor bar 3'8’ to pull to
the left both that bar and the rest of the catch means 35'.
Hence, depression of handle 30’ serves to retract the catch
means to thereby unlatch or release the door so that it
may be opened.
The catch means 35' may also be retracted for door
opening purposes by the inside handle 50' shown in FIG.
2. Such inside handle is most conveniently reached by
the driver when the handle is positioned Well towards the
front of the cab, and when, for a forwardly hinged door,
it is accordingly spaced horizontally by most of the width 60
seen in FIG. 2) to thereby produce a downward move
ment of the pin 45'. Since, however the pin 45’ is free
to slide downwardly within slot 44', the downward move
ment of the pin is taken up by such sliding, and, accord
ingly, the motion of bar 38’ induced by operation of inside
handle 50' is not communicated past pin 45' through the
rest of the vertical linkage to the outside handle 30".
The uncoupling in this manner of outside handle 30"
and most of the vertical linkage from the horizontal link
age (when inside handle 50' is used to open the door) is
a feature having the advantage that it permits the inside
handle to be operated for door-opening purposes Without
being loaded by the linkage associated with the outside
26’. Because of this horizontal spacing between handle
handle. The linkage combination shown in FIG. 2 is thus
particularly useful in that, not only does it provide the ad
vantage just mentioned but, at the same time, it also
permits (as described) both the inside and the outside
handle to be biased against door-opening movement by the
50’ ‘and the catch means, it is ‘necessary to connect one
single spring 61'.
of the door from the catch means 35’ at the rear margin
with the other by a linkage consisting of the following:
The above-described embodiment of the invention being
(8) a shaft 55' to ‘which handle 50’ is a?ixed, (9) a crank 65 exemplarly only, it will be understood that additions
56' :a?ixed on the interior of panel 14' to shaft 55', (10)
thereto, omissions therefrom and modi?cations thereof
can be made without departing from the spirit of the in
a pin 57’, and (11) a link bar 58’ coupled ‘at its left
vention, and that the invention comprehends embodi
hand end through pin 57' to crank 56', and loosely cou
ments differing in form and/or detail from that speci
pled at its right-hand end by pin 48' to the retractor bar
?cally disclosed. For example, the doors for the de
38'. As with the outside handle 36', a door opening
scribed truck cab can be rearwardly hinged, the step,
movement of the inside handle 50’ is communicated
grab handle and outside door handle being accordingly,
through the linkage just described to the catch means 3'5’
for opening thereof. The inside handle differs, however,
placed forwardly rather than rearwardly, and correspond
ing modi?cations being made in the linkage system shown
from the outside one in that it is an upward rather than a 75
in FIG. 2.
to retract such catch means to thereby release the door
.
.
3,094,352
5
The invention, therefore, is not to be considered as
limited save as is consonant with the recitals of the fol
lowing claims.
I claim:
1. The combination on a truck having a hinged door
for the cab thereof, said door being mounted several feet
above the ground, comprising, a stationary grab handle
a?ixed to the outside of the cab adjacent the unhinged
vertical margin of said door and high up from the bottom
6
of the associated door handle to release said door for
opening by retracting said catch means.
3. The combination on a truck having a forwardly
hinged door for the cab thereof, said door being mounted
several feet above the ground, comprising, a stationary
grab handle a?ixed to the outside of said cab adjacent the
rearward vertical margin of said door to enable a person
to lift himself into said cab with said grab handle, catch
means carried by said door at said margin and forming
thereof to enable a person to lift himself into said cab 10 part of a latch for locking said door in closed position
with said grab handle, catch means carried by said door
when said catch means is unretracted, a ?rst movable door
at said margin and forming part of a latch for locking said
handle disposed on the outside of said door near the
door in closed position when said catch means is unre
bottom thereof and adjacent said margin in downwardly
tracted, a movable door handle disposed on the outside of
spaced relation from said catch means to prevent a per
said door near the bottom thereof and adjacent to said 15 son from lifting himself into said cab with said door
margin in downwardly spaced relation from said catch
handle, a second movable door handle disposed on the
means to prevent a person from lifting himself into said
inside of said door in forwardly spaced relation from said
cab with said door handle, and a linkage connecting said
catch means, ?rst and second linkages connecting said
movable door handle and catch means and responsive to
catch means with, respectively, said ?rst and second door
movement of such door handle to release said door for 20 handles, either linkage being responsive to movement of
opening by retracting said catch means.
the associated door handle to release said door for open
2. The combination on a truck having a forwardly
ing by retracting said catch means, a spring coupled to the
hinged door for the cab thereof, said door being mounted
linked system of said catch means and said second door
several feet above the ground, comprising, a stationary
handle and second linkage to impart to said system a force
grab handle a?ixed to the outside of said cab adjacent the 25 biasing said second door handle against door-opening
rearward vertical margin of said door to enable a person
movement, and a pin and slot coupling included in said
to lift himself into said cab with said grab handle, catch
?rst linkage to render said ?rst door handle biased by
means carried by said door at said margin and forming
said force against door-opening movement while permit
part of a latch for locking said door in closed position when
ting said catch means to be retracted by door-opening
said latch means is unretracted, a ?rst movable door handle 30 movement of said second door handle without accompany
disposed on the outside of said door near the bottom
ing movement of said ?rst handle
thereof and "adjacent said margin in downwardly spaced
relation from said catch means to prevent a person from
lifting himself into said cab with said door handle, a
second movable door handle disposed on the inside of said 35
door in forwardly spaced relation from said catch means,
and ?rst and second linkages connecting said catch
means with, respectively, said ?rst and second door
handles, either linkage being responsive to movement
References Cited in the ?le of this patent
UNITED STATES PATENTS
1,534,216
2,148,308
2,628,091
2,928,690
Horning _____________ __ Apr. 21, 1925
Spear ________________ __ Feb. 21, 1939
Rappl _______________ __ Feb. 10, 1953
Larson _, ____________ .._ Mar. 15, 1960
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