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Патент USA US3088775

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May 7, 1963
H. KRAUSE
3,088,765
LQCK ASSEMBLY
Filed Sept. 1, 1960
2 Sheets-Sheet 1
IN VEN TOR.
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May 7, 1963
H. KRAUsE
3,088,765
LOCK ASSEMBLY
Filed Sept. l, 1960
2 Sheets-Shes?I 2
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United States Patent O "ice
1
3,088,765
LOCK ASSEMBLY
Herbert Krause, Chicago, Ill., assigner to Chicago Forging
and Manufacturing Company, Chicago, Ill., a corpora
tion of Delaware
Filed Sept. 1, 1960, Ser. No. 53,414
9 Claims. (Cl. 292-11)
3,088,765
Patented May 7, 1963
2
serrated edge 42. The latch structure shown herein is
adjustable in that the pin may be engaged by any one
of the grooves formed by the serrations 42 and at any
such position will lock the latch element.
A safety hook 46 is pivoted, at at 50, near the upper
end of the plunger, and has a lower hook portion 48
which extends outwardly from the plunger. The safety
hook is biased to the 'outwardly extended position by a
spring 52, mounted at one end 54 to the plunger and
an automobile hood latch and in particular relates to 10 mounted at the opposite end to a laterally extending por
tion 5 6 of the safety hook.
refinements in such a structure for increasing the relia
Mounted on the outside or opposite side of the plunger
bility thereof.
is an actuating arm -58 which includes a release portion
A primary purpose of the present invention is to pro
or release member 60. Preferably the actuating arm and
vide a locking structure of the type described which pre
This invention relates to a lock assembly for use as
vents accidental catching of the latch member in a par
tially extended position.
Another purpose is to provide a guide plate for use on
release member are pivoted on the plunger about the same
point as the safety hook. The release member 60v has an
abutment portion 62 which extends through an arcuate
slot 64- in the plunger side wall. The abutment portion
the plunger of a latch structure, which guide plate insures
62 is positioned to contact the upper end of the latch
that the latch member will always be fully extended.
Another purpose is to provide a hood latch structure 20 control member. Thus, the release member will prevent
inward movement of the pivotal latch control member
of the type described having a camming or sliding surface
and hence will resist inward movement of the latch ele
which insures complete extension of the latch member
at all times.
ment caused by downward pressure on the upper surface
of the latch element.
Other purposes will appear in the ensuing specification,
A guide plate or guide member 66 is pivotally mounted
25
drawings and claims.
to the plunger at pivot point 50 and includes a flange-like
The invention is illustrated diagrammatically in the fol
surface 68 ‘which forms a sliding or camming surface for
lowing drawings Iwherein:
the upper end of the latch control member. The guide
member 66 pivots with the safety hook and the release
FIGURE 2 is a side view of the plunger of FIGURE l 30 member and when in the release position, where the
FIGURE 1 is a side view showing the plunger of the
present invention positioned above the latch plate,
safety hook is withdrawn into the plunger and the release
member is out of the path of the latch control member,
the sliding or camming surface 68 is slidably contacted
by the upper end of the latch control member.
This invention relates to a hood latch structure for use
The plunger structure is completed by mounting holes
on automobiles or the like having a conventional keeper 35
70 formed in projecting plate portions 72 on the upper
or plunger, and a latch plate into which the plunger is
end of the plunger.
to be inserted. Preferably, the latch plate, such as indi
from the opposite side, and
FIGURE 3 is an end view, with portions broken away
for clarity, of the plunger of FIGURES 1 and 2.
The use, operation and function of the invent-ion are
cated at 10 in FIGURE 1, is mounted on the hood or
body structure of the automobile and the keeper or 40 as follows:
Shown and described herein is an improvement in
plunger 12 is mounted on the hood closure. The place
hood latch structures, of the type generally shown in
ment of these members may be reversed however with
co-pending application Serial No. 630,227, filed Decem
satisfactory results. The latch plate 110 has an aperture
ber 24, 1956, now Patent No. 2,955,859. In particular
or opening 14 to receive the plunger 12, with the edge of
the opening opposite the safety hook being generally flat,
as at 16, and the opposite edge of the aperture 14 bein-g
somewhat curved, as at ‘18, for sliding contact with the
latch member as hereinafter described.
The plunger 12 includes a latch control element 20
this invention relates to means for insuring full exten
45 sion of the latch element or latch member at all times.
In operation, as the hood closure is moved towards
the hood or body of the automobile, the safety hook 46
will strike the latch plate I10 and the bottom curved sur
pivotally mounted, as at 22, adjacent the lower end of 50 face of the safety hook will cause the hook to move in
ward against the action of spring 52. Once the pro
the plunger. The latch control element 2@ has a pin 24
jecting portion 4S of fthe safety hook is down beyond
which extends outwardly from the control element for
the latch plate, the spring 52 will urge the safety hook
pivotally mounting a latch member 26. The pin 24 is
outward so that it underlies the latch plate, hence hold
inserted in a slot or enlarged hole 28 in the latch mem
ber 26 so that the latch member may both pivotally and 55 ing the plunger within the plate. Continued downward
movement of the plunger results 'in Contact between the
slidably move on the latch control element. The extent
lower surface of the latch element or latch member and
of slidable movement is slight, however,_ there is pro
the edge 18 of the latch plate. The latch element will
vision for sufiicient slidable movement such that the lock
be forced inward against the force of spring 32 so that
ing pin, hereinafter described, may be released. A washer
or the like 30 is mounted on the pin 24 on top of the 60 the plunger may pass through the latch plate. The latch
element will move outward onoe it is past the latch
latch element and secures the latch" element to the control
plate to firmly lock the plunger in the plate.
member. A spring 32 has one end mounted in a slot 34
Once the plunger is completely received within the
latch plate, any upward movement of the hood closure
32 biases the latch element on the control member so that 65 will result in downward pressure by curved surface 18
of the top of the latch element. Such downward pres
the latch element is urged youtwardly from the plunger.
sure will force the pin 44 more firmly into its locking
A slot 38 is provided in the side wall of the plunger for
groove. In other words, it will be impossible for the
movement of the latch element.
latch element to rotate inwardly to the released posi
The latch element 26 may have an arcuate slot 40,
the upper surface of which preferably has a serrated edge. 70 tion as the pin 44 firmly holds the latch plate in the
extended position. As mentioned before, the pin 44 may
A pin 44 is mounted on the control member and extends
seat in any one of the grooves formed by the serrations
toward the latch element for locking engagement with the
in the pin 24 and has the opposite end biased against an
abutment portion 36 of the latch element. The spring
3
42 and will still ñrmly lock the latch element in posi
ing through said plunger and positioned to block said
tion. Such downward and inward pressure by the latch
plate 10 cannot move the pin 44 inwardly as the pin
latch -control member when said latch mem-ber is in the
extended position, a safety hook pivoted on said plunger
is mounted on the latch control member which in turn
and extending outwardly therefrom, a spring biasing said
is prevented from inward movement by the abutment
portion >of the release member.
In order to release the safety hook and thelatch ele
safety hook to said extended position, and an outwardly
extending flange-like surface on said plunger, said latch
tion 62. out of the path of the top of the control member
ment portion until the latch member is fully extended.
such that `downward pressure on the top of the latch
4. The structure of claim 3 further characterized in
that said safety hook and said release member are piv
oted about the same point, a plate pivoted on ysaid plunger
about said safety hook and release member pivot point,
control member being slideable on said surface, said sur
face being adjacent and ,pivotal with said release mem
ment, Íthe handle 58 and the release member 60 form
ber abutment portion to prevent locking contact between
ing a portion thereof are rotated about pivot point 56'.
Rotation of the release element moves the abutment-por l0 the latch control member and said release member abut
element will move this member and the ,controlv member
inwardly. Rotation of the handle 5S also rotates the
safety hook inwardly as the safety hook is mounted for
said plate being positioned between said safety hook and
pivotal movement with the Vhandle 58.
said release member and having a ~flange-like portion
After the safety hook and latch element have cleared
the latch plate the upper surface of the control element
along one edge which forms said surface.
Will slide on the camming or sliding surface 68 of the
5. For use in an automobile hood latch structure, a
guide member ‘6G as the control element and latch ele 20 plunger-,a latch control member pivoted on said plunger,
ment return to the extended position of FIGURE l. In
a latch member slideably and pivotally mounted on said
the above-mentioned co-pending application, there was
control member, a spring mounted on said plunger and
no-such sliding surface or guide-member. It was pos
sible for the upper end of the control member to catch
on the abutmentrportion of the release member such
that the latch element would be stopped before it reached
urging said latch member about its pivot point outward
ly from said plunger, a release member pivoted on said
plunger and having an abutment portion positioned to
block said latch control member, a safety hook pivoted
its fully extended position. This resulted in improper
on said plunger about the same point as said release
locking ofthe hook closure and it was necessary to move
member, a spring urging said -safety hook outwardly from
said plunger, land a plate Apivoted on said plunger and
the release handle up and down before the latch element
would Ibe fully extended. The sliding or camming sur
face 68 prevents any catching or binding between the
Yabutment portion of the release member and the con
trol member. Preferably, the guide member~ 66 is piv
having a surface positioned to be in sliding contact with
said latch control member as said latch control member
pivots through >parts of its excursion on said plunger,
said surface -being adjacent said abutment port-ion and
otally moved with the release member so that the ñange
preventing locking contact between the latch control mem
like surface forming the sliding surface 68 will be out 35 member and said release member abutment portion until
of :the path of the control member as it moves inwardly
the latch member is yfully extended.
when thejplunger is pulled out of the latch plate.
6i. The structure of claim >5 further characterized in
Whereas the preferred form of the invention has been
that said plate pivots with said release member and said
shown and described herein, it should be realized that 40 surface is generally perpendicular to said abutment-por
there are many modiñcations, substitutions and alter
ations thereto within the scope of the following claims.
tion.
'
I claim:
7. For `usevin an automobile hood latch structure, a
plunger, a latch control-member pivotally `mounted on
1. A latch structure including a latch plate having
said plunger, a latch element pivotally and slideably
an aperture, a plunger positioned to enter said aperture,
mounted on said control member, a spring-connected to
a latch'control member pivoted on said plunger, a latch 45 said latch elementv and said control member and posi
member pivotally mounted on said control member and
tioned lto urge said latch element about its pivot point
extending outwardly from said plunger, a spring urging
said latch member to said outwardly extended position,
outwardly from sa-id plunger, a release member pivoted
on said plunger and havingan abutment portion‘posi
said latch member being positioned to contact said latch
tioned to block said -control member when said control
plate as said plunger moves through said aperture, a 50 member is in one position, a guide member pivoted on
release member pivotally mounted on said plunger, said
said plunger for simultaneous movement with said re
release member having a portion positioned to block
lease member, said guide member having a surface posi
said latch control member when said latch member is
in the extended position, and an outwardly extending
ñange-like surface on said plunger, said latch control
member having a portion slideable on said surface dur
ing4 a portion of its travel on said plunger, said surface
tioned for sliding contact Vwith said control member when
said control member is not in said one position whereby
Contact 'between said release memberabutment portion
and said control member is precluded except when said
control member isfin said one position.
beingV adjacent and pivotal with said release member
8. A latch structure including a latch platehaving an
portion to prevent locking contact between the latch
aperture, a plunger positioned to enter saidaperture, a
control member and said release member portion until 60 latch control member pivotally mounted on said plunger,
the latch member is fully extended.
a latch element pivotallyand slideably mounted on said
2. The structure of claim 1 further characterized by
control member, a spring connected to said latch element
a plate pivoted on said plunger, said plate having a iiange
and said control member and biasing- said latch element to
like portion along one edge‘which forms said surface.
a position outwardly of said plunger, said latch element
3. A latch structure including a latch plate having an
being positioned to contact said latchplate as said plunger
aperture, a plunger positioned to enter said aperture, a
moves through said aperture, means for locking said
latch control member pivotally mounted on said plunger,
latch element in latched position in response to movement
of said plunger outwardly from said aperture including a
a latch member pivotally mounted on said control mem
ber and extending outwardly :from said plunger, a spring 70 slot in said latch element, a pin mounted on said control
member and extending through said slot, said slot hav
urging said ‘latch -member to said outwardly extended
ing a serrated edge positioned to engage said pin, a re
position, said latch member being positioned to contact
lease member pivoted on said plunger and having an abut
said latch plate as said plunger moves through said aper
ture, a release member pivotally mounted on said plunger,
ment portion extending through said plunger in position
said release member having an abutment portion extend
to-block said .control member, a safety hook pivoted on
3,088,765
5
6
said plunger about said release member pivot point, a
that said guide member is a plate mounted for pivotal
spring urging said safety hook outwardly of said plunger,
movement with said release member and safety hook and
and a guide member pivoted on said plunger about said
positioned between said release member and safety hook.
release member pivot point and having a surface extend
ing laterally from said abutment portion and positioned 5
References Cited in the ñle of this patent
for sliding Contact with said control member, said surUNITED STATES PATENTS
face being adjacent said abutment portion to prevent
said abutment portion until the latch member is fully
extended.
9. The structure of claim 8 further characterized in
10
2,797,116
laster _______________ __ June 25, 1957
2,955,859
Krause et al ___________ __ Oct. l1, 1960
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