U.S. patent number 3,823,907 [Application Number 05/322,477] was granted by the patent office on 1974-07-16 for positive locking device.
Invention is credited to Theodore Ziaylek, Jr..
United States Patent |
3,823,907 |
Ziaylek, Jr. |
July 16, 1974 |
**Please see images for:
( Certificate of Correction ) ** |
POSITIVE LOCKING DEVICE
Abstract
A device for use with a walkaway bracket, adapted to positively
grasp breathing apparatus. Slide rails are fastened to a bracket,
which bracket is affixed to a rescue package. Locking means are
slidably received between the slide rails, and which locking means
include a plate slidably received between the slide rails, and
housings mounted at the extremities thereof. One of the housings
includes an actuating means, the other including a positioning
means characterized by a positioning finger. The housings each
include openings which receive therethrough arm members which are
pivotally mounted to the slide rails. A cam is associated with the
actuating means and is active on one of the arm members. This
action is translated into sliding movement of the locking device
toward that arm member. Simultaneously the arm members are pivoted
toward convergence with each other and they positively grasp the
tank of the breathing apparatus.
Inventors: |
Ziaylek, Jr.; Theodore
(Yardley, PA) |
Family
ID: |
23255080 |
Appl.
No.: |
05/322,477 |
Filed: |
January 10, 1973 |
Current U.S.
Class: |
248/313 |
Current CPC
Class: |
A62C
13/78 (20130101) |
Current International
Class: |
A62C
13/78 (20060101); A62C 13/00 (20060101); A62c
033/00 () |
Field of
Search: |
;248/313,311,316R,316B
;211/71,75,88 ;24/248E,249WL,249LW,249PP,316B ;269/237,150 |
References Cited
[Referenced By]
U.S. Patent Documents
Primary Examiner: Foss; J. Franklin
Attorney, Agent or Firm: Sperry and Zoda
Claims
I claim:
1. A positive locking device for use with a bracket, said bracket
adapted to be attached to a package of rescue equipment including
breathing apparatus, wherein said device comprises a pair of
generally parallel slide rails mounted on said bracket, locking
means slidably mounted between said slide rails, said locking means
including first and second housings mounted adjacent the
extremities of said locking means, first and second arm members
extending outwardly from, and pivotally mounted to, said slide
rails adjacent said housing and adapted to positively grasp said
breathing apparatus upon the actuation of said locking device, said
arm members being received in openings in the respective housings,
which openings are contoured to permit the pivoting of said arm
members therewithin, said first housing including actuating means
active on said first arm member and effective to move said locking
means toward said first arm member and effective to pivot said
first arm member toward convergence with said second arm member,
said second housing including adjustable positioning means which is
active on said second arm member to pivot said second arm member
toward convergence with said first arm member, whereby actuation of
said actuating means converges said arm members which clutch said
breathing apparatus.
2. The device of claim 1 wherein said breathing apparatus is a
cylindrical tank.
3. The device of claim 1 wherein said arm members are outwardly
bowed, the tips thereof closer to each then the corresponding
intermediate points.
4. The device of claim 1 wherein said actuating means comprises a
lever pivotally mounted to said first housing and having a cam
attached thereto, said cam being active on said first arm member as
said lever is pivoted.
5. The device of claim 2 wherein said positioning means includes a
finger active on said second arm member to pivot said arm member
into engagement with said tank.
6. The device of claim 5 including an adjustable thumb wheel
mounted on said finger which cooperates with means on said second
housing to adjustably position said finger to grasp tanks of
various sizes.
7. The device of claim 1 wherein said locking means includes a
plate received between said slide rails and said housings are
fixedly suspended above a face of said plate, connected thereto by
rapid flanges.
8. The device of claim 1 wherein said breathing apparatus comprises
a generally cylindrical tank, and said arm members are bowed so as
to embrace said tank, said actuating means comprises a lever
pivotally mounted to said first housing having a cam attached
thereto, said cam being active on said first arm member as said
lever is pivoted, and said positioning means includes a finger
active on said second arm member to pivot said arm member into
engagement with said breathing apparatus as said locking means
slides toward said first arm member, whereby upon actuating said
locking means, said cam pivots said first arm member and said
finger pivots said second arm member, said pivoting of said arm
members being toward convergence with each other, which arm members
embrace said tank.
9. The device of claim 7 wherein said breathing apparatus comprises
a generally cylindrical tank, and said arm members are bowed so as
to embrace said tank, said actuating means comprises a lever
pivotally mounted to said first housing having a cam attached
thereto, said cam being active on said first arm member as said
lever is pivoted, and said positioning means includes a finger
active on said second arm member to pivot said arm member into
engagement with said breathing apparatus as said locking means
slides toward said first arm member, whereby upon actuating said
locking means, said cam pivots said first arm member and said
finger pivots said second arm member, said pivoting of said arm
members being toward convergence with each other, which arm members
embrace said tank.
10. The device of claim 1 including cross rails attached to said
slide rails to maintain said locking means within said plate.
11. The device of claim 10 wherein the cross rails are affixed to
the opposing faces of said plate.
12. The device of claim 1 including resilient means connected to
said first arm member and said first housing, which resilient means
opposes the actuation of said actuating means
13. In a rescue apparatus, a device of the quickly lockable and
releasable type for retaining an oxygen tank or the like on a
tank-supporting bracket of the "walkaway" type, comprising:
relatively slidably engaged first and second support means one of
which is adapted for attachment to said bracket; a pair of clamp
arms attached to the first support means for relative pivotal
movement toward and away from each other between tank-gripping and
-releasing positions respectively; cam means mounted on the second
support means adjacent one of said arms for rotation into and out
of a position in which it first biases said one arm toward the
other arm into a tank-gripping position and then locks said one arm
in said gripping position thereof; and abutment means mounted on
the second support means adjacent the other arm and retaining said
other arm in position to cooperate with said one arm in gripping
the tank.
14. In a rescue apparatus, a device as in claim 13 wherein one of
said support means comprises a pair of guide rails and the other
support means is a plate slidably engaged with said rails.
15. In a rescue apparatus, a device as in claim 13 wherein the
first support means comprises a pair of parallel guide rails, the
second support means comprising a plate slidably mounted on the
guide rails between the same, the second support means further
comprising a pair of housings mounted on the plate, said cam means
being carried by one of the housings and the abutment means being
carried by the other housing.
16. In a rescue apparatus, a device as in claim 13 wherein the
second support means includes a plate slidably mounted upon the
first support means, and further includes a pair of housings
mounted upon the plate, the clamp arms extending through said
housings, the cam means being mounted upon one of said housings and
the abutment means being mounted upon the other housing in position
to engage the portions of the clamp arms extending through the
housings.
17. In a rescue apparatus, a device as in claim 16, wherein said
cam means is pivotally mounted upon its associated housing in
spaced relation to the pivot axis of the clamp arm engageable by
the cam means, said cam means including a locking surface spaced
outwardly from the pivot axis thereof and extending in
substantially flat face to face contact with said one clamp arm in
the locked position of said one arm.
18. In a rescue apparatus, a device as in claim 13, said second
support means including a plate slidably mounted upon the first
support means and further including a pair of housings mounted upon
said plate, the clamp arms extending through said housings, said
cam means being mounted upon one of said housings for biasing said
one clamp arm toward the other clamp arm, said abutment means being
mounted in the other housing for adjustment toward and away from
the cam means for adjustable positioning of the other clamp arm in
respect to said one clamp arm.
Description
BACKGROUND OF THE INVENTION
The present invention relates to a device, associated with a
bracket affixed to rescue equipment, which positively clutches a
breathing tank.
In accidents and other emergencies, time is often a critical
factor. Life or death may depend on the ability of a rescue worker
to immediately embark on life-saving activities. Any time wasted in
preparatory activities detracts from a worker's ability to
administer positive life-saving action. There have been a number of
noteworthy contributions in this area which have increased the
survival rates for accident victims. The present invention provides
a creditable contribution to this art.
Examples of prior art embodiments are those illustrated in U.S.
Pat. Nos. 3,603,550 and 3,547,391. These and other mechanisms are
characterized by complicated latching systems employed to grasp the
oxygen tank. These devices usually contain a plurality of parts in
complex arrangements. The present invention accomplishes its
principal task with an economy of parts which are quite simply
arranged. This invention is actuated by a simple motion which can
be executed in inconvenient positions, such as behind one's back,
if necessary. The simple pulling of a lever locks the device around
the oxygen tank until it is released by moving the lever in the
reverse direction. There is no possibility of the tank being
accidentally ejected since the locking is positive and secure. An
additional feature is that the device embodying the present
invention can be adjusted to accommodate tanks of various sizes. In
use, the rescue worker simply actuates the mechanism and walks away
with the oxygen tank. The rescue worker can therefore spend most of
his time performing his primary function; that of administering
first aid.
SUMMARY OF THE INVENTION
It is an object of the present invention to provide a device for
the positive grasping of a breathing apparatus.
Another object of the present invention is the provision of a
device for the positive grasping of a breathing apparatus that is
adjustable to accommodate tanks of varying sizes.
Still another object of the present invention is the provision of a
locking device that is actuated by a simple motion and which
suppresses any tendency to accidentally release the breathing
apparatus.
A further object of the present invention is the provision of a
locking device characterized by an economy of parts.
In accordance with the above designs, the present invention is
embodied in a device adapted to be connected to a bracket of the
"walkaway" type. A pair of parallel side rails are suitably
attached to the bracket. Received within the slide rails is a
plate, or slide member, which is adapted to slide along the slide
rails.
Affixed at the ends of the slide member are housings which
incorporate locking structure. A first housing includes a hole
contoured to receive therethrough a first arm member which is
pivotally mounted to the slide rails. The arm member is permitted
pivotal movement within the hole between specified limits. The arm
member is bowed so as to conform to the shape of a cylindrical
oxygen tank. The first housing includes a lever which is pivotally
mounted thereon adjacent the first arm member. The lever includes a
cam surface which is in constant contact with that arm. When the
lever is raised the cam is active on the arm to initiate two
movements; a first movement wherein the slide member and the
housings are thrust toward the first arm member; and a second
movement wherein the first arm member is forced into contact with
the tank.
The second housing contains an opening which accommodates a second
arm member much in the same manner as the first housing and first
arm member. The second housing includes locking structure
characterized by an adjustable finger which is active on the second
arm member. Upon actuation of the lever, the slide member moves
toward the first housing, and the finger forces the second arm
member toward convergence with the first arm member, both of which
positively grasp the tank. The finger is adjustable to permit the
device to accommodate tanks of varying diameters; therefore a
thumbscrew adjustment wheel is included to perform the necessary
adjustments.
The above and other objects of the present invention will be
apparent as the description continues, and when read in conjunction
with the appended drawings.
DESCRIPTION OF THE DRAWINGS
FIG. 1 is a bottom plan view, partially cut away, of the locking
device.
FIG. 2 is a perspective view of a preferred embodiment of the
present invention shown affixed to a bracket.
FIG. 3 is a front elevational view of the locking device.
DETAILED DESCRIPTION
The instant invention is associated with a bracket generally known
as a "walkaway" bracket. Such brackets, as they have been known in
the art, are attached to a container of rescue equipment, which
container can be attached to a wall, a vehicle seat or a rescuer's
back. By means of the instant invention, an oxygen tank 10 can be
quickly and simply released so that life-saving activities can be
immediately initiated.
The bracket 12 which incorporates the instant invention, comprises
the elongated belt-like member 14 which is suitably attached to a
package of rescue equipment. The bracket 12 also includes the
resilient, bowed clips 16, 18 which are adapted to grasp the oxygen
tank 10. The clips 16, 18 are insufficient to lockably engage the
tank 10, and are provided primarily to releasably grasp and
position the tank and prevent it from pivoting. A second set of
similar clips, not shown, may be provided as may be desired. At the
lower extremity of the member 14 is a foot member 20 having a slot
22 which is bounded by fingers 24, 26. The foot 20 is provided to
vertically support the tank 10 which is quite heavy and might
otherwise slide downwardly.
The device embodied in the instant invention is characterized by
the parallel slide rails 28, 30. These rails, which may be
metallic, include slide surfaces which are finished to permit easy
sliding therealong. The slide rails 28, 30 are affixed to the belt
14 by means of threaded studs 32, 34, 36, 38 which are attached to
a back plate 40. The back plate 40 is included so as to sandwich
the belt 14 between the slide rails and back plate. This
construction prevents the belt 14 from pivoting with respect to the
slide rails and provides for a secure attachment. The studs 32, 34
are received in holes 42, 44 in the top slide rail 28, and the
studs 36, 38 are received in the holes 46, 48 in the bottom slide
rail 30. The nuts 50, 52, 54, 56 are threaded to the various studs
creating a secure sandwich. To provide further connection between
the belt 14 and slide rails 28, 30, holes 58, 60 are provided in
the rails 28, 30 and the belt 14. Screws received in these holes
prevent the belt 14 from slipping relative to the slide rails 28,
30.
A series of cross rails 62, 64, 66, 68 are transversely affixed to
the slide rails 28, 30 to maintain the locking means 70 within the
slide rails 28, 30. Without the cross rails, the locking means
might otherwise slip out from between the slide rails. The cross
rails can be welded to the slide rails or connected in any other
suitable manner.
The locking means 70 is characterized by the slide member or plate
72 which is received between the slide rails 28, 30 and includes
slide surfaces which slide relative to the slide surfaces of the
slide rails 28, 30. The plate 72 is elongated and generally equal
in length to the slide rails 28, 30.
Attached to the ends of the plate 72 are the first 74 and second 76
housings. The first housing 74 includes side walls 78, 80, a front
wall 82 and a bottom wall 81 which define a cavity which
accommodates an actuating means 84. The bottom wall 81 includes a
generally rectangular hole (not shown) the function of which will
be evident as the description continues.
The second housing 76 is of a box shape having sides which define a
generally rectangular opening. The bottom wall includes a hole of
the same general nature as the hole in the first housing 71. A pair
of arm members 90, 92 are pivotally connected to the slide rails
28, 30 and are received within the aforementioned holes. The arm
members 90, 92 are bowed, the outer tips being closer to each other
than corresponding intermediate points. The arm members 90, 92 are
adapted to grasp the tank 10 in a manner hereinafter described. The
arm members 90, 92 are connected to the slide rails 28, 30 by means
of the shafts 94, 96 which are arranged transverse to the slide
rails 28, 30 along the extremities thereof. The shafts 94, 96 are
maintained in position by a series of crimping members. Crimping
members 98, 100 are crimped about the shafts 94, 96 and the top
slide member 28. The crimping members 102, 104 are crimped about
the shafts 94, 96 and the bottom slide member 30. The crimping
members 106, 108 are crimped about the shafts 94, 96 and the arm
members 90, 92. The aforementioned members maintain the shafts 94,
96 in place but at the same time permit relative rotation thereof.
The crimping members may be welded to the slide rails 28, 30 and
the arm members 90, 92 or otherwise suitably attached thereto. The
shafts 94, 96 are prevented from slipping out of place by means of
the caps 97.
The actuation means 84 is pivotally connected to the first housing
74 by means of pin 110 which is journaled into holes in the walls
78, 80 of that housing, and is capped so as to be securely held
therein. The actuating means comprises a lever 116 to which is
secured a knob 118. The lever 116 has a flat, elongated surface 120
and a lug section 112, through which the lever 116 is journaled
onto pin 110. The bottom surface 124 of lever 116 is active on arm
member 92 which the device is in the unactuated condition. When the
lever 116 is raised to a position essentially perpendicular to the
plate 72, the edge or corner portion 126 defined by the
intersection of surfaces 120, 124 acts on the arm 92 and cams it
toward arm member 90. Concurrently, the plate 72 must slide toward
arm member 92 so that lever 116 may be shifted to the upright
position thereof shown in FIG. 1.
The second housing 76 incorporates positioning means 128 which is
active on arm member 90 at the same time the plate is moved toward
arm member 92. A threaded finger 130 extends inwardly and includes
a push rod 132 which pivots the arm member 90 toward convergence
with the other arm member.
The push rod 132 is received in an opening (not shown) in finger
130. A thumb wheel 136 adjusts the position of finger 130 in hole
138 after which a lock nut 139 retains the finger against rotation,
to adjust the device to accept tanks of various diameters. As the
plate 72 moves toward arm 92, the push rod 132 cams arm 90 about
its pivot 96 in a clockwise direction (viewing the same as in FIG.
1) the lever 116 cams the arm 92 about its pivot 94 in an opposite
direction, and the tank 10 is clutched. Conversely, when the lever
116 is lowered the plate moves back toward arm 90, and tank 10 is
released.
The housing 74, 76 are connected to plate 72 by way of the flanges
140, 142, respectively. These flanges maintain the housings 74, 76
in a raised position so as to clear the slide rails and the pivot
shafts 94, 96.
A spring 150 is connected to arm 92 and to pin 152 which pin is
connected to housing 74. When the lever 116 is in the raised
position, the spring is stretched, providing resistance to the
raising of the lever 116. When the lever 116 is lowered, the spring
150 forces the plate 72 to slide back toward arm member 90, and arm
member 92 to pivot out of contact with the tank 10.
The locking device, as hereinbefore defined, enables a rescue
worker to quickly snap out the tank 10, thereby conserving as much
time as possible during an emergency. The action of the device is
dependable and simple, with little chance of jamming. The necessary
movements can be accomplished in virtually any position. The
present invention represents a novel extension over the prior art
by providing superior structural and operating characteristics.
Many changes may be made in the details of the instant invention
without departing from the spirit and scope of the appended claims,
which changes are intended to be embraced therewithin.
* * * * *