|Publication number||US2559473 A|
|Publication date||Jul 3, 1951|
|Filing date||Jan 27, 1949|
|Priority date||Jan 27, 1949|
|Publication number||US 2559473 A, US 2559473A, US-A-2559473, US2559473 A, US2559473A|
|Inventors||Slodek Sr Wallace L|
|Original Assignee||Slodek Sr Wallace L|
|Export Citation||BiBTeX, EndNote, RefMan|
|Patent Citations (5), Referenced by (14), Classifications (7)|
|External Links: USPTO, USPTO Assignment, Espacenet|
y 3, 1951 w. L. SLODEK, SR 2,559,473
LEG BRACE Filed Jan. 27, 1949 2 Sheets-Sfieet 1 Fig.
Wallace L. Sladek, 5r. INVENTOR.
non Waxy 3m July 3, 1951 w. L. SLODEK, SR
LEG BRACE 2 Sheets-Sheet 2 Filed Jan. 27, 1949 Fig. 7.
Wallace L Slade/g 5r.
BY mw Patented July 3, 1951 UNITED STATES PATENT OFFICE LEG BRACE Wallace L. Slodek, Sr., Nashville, Tenn.
Application January 27, 1949, Serial No. 73,135
1 Claim. 1
This invention relates to new and useful improvements and structural refinements in leg braces, and the principal object of the invention is to' provide a device of the character herein described which is simple in construction, light that they may be securely locked in a predeter- -mined relative position, but may be expeditiously unlocked to facilitate bending of the leg at the knee. Another feature of the invention involves the arrangement of the pivot joint and locking means in such manner that the joint automatically locks itself when the leg straps, after bending of the leg, are returned to a predetermined relative position.
With the above more important objects and feature in view, and such other objects and features as may become apparent as this specification proceeds, the invention consists essentially of the arrangement and construction of parts as illustrated in the accompanying drawings, in which:
Figure 1 is a front elevational view of the invention;
Figure 2 is a side elevational view thereof;
Figure 3 is a fragmentary side elevational detail, partially broken away and showin the pivotal attachment of the foot cradle to the lower leg straps;
Figure 4 is a side elevational detail of the knee joint used in the invention;
Figure 5 is a side elevational view, similar to that shown in Figure 4, but showing the joint as being partially broken away so as to reveal its construction;
Figure 6 is a cross sectional View, takensubstantially on the plane of the line 66 in Figure 5;
Figure 7 is a cross sectional view, takensubstantially on the plane of the line 'l-| in Figure 4;
Figure 8 is a fragmentary side elevational view, similar to that shown in Figure 3 but illustrating a modified form of construction; and
Figure 9 is a cross sectional view, taken substantially on the plane of the line 99 in Figure 8.
Like characters of reference are employed to designate like parts in the specification and throughout the several views.
Referring now to the accompanying drawings in detail, the invention consists of a leg brace designated generally by the reference character [-6, the same embodying in its construction, inter alia, a pair of spaced, upwardly divergent, upper leg straps l8, a pair of spaced, substantially parallel, lower leg straps 20 and a substantially U-shaped foot cradle 2.2.
The upper le straps Ia are connected together by suitable cross members 24, 26 and are pivotally connected to the lower leg straps. 20 by a pair of pivot joints 28 which will be hereinafter described.
The lower end of the lower leg straps 20. are provided with connecting members or adapters 30 having a U-shaped cross sectional configuration so as to provide sockets wherein the lower end portions of the straps 20 may be rigidly secured by transversely extending rivets 32, and it is to be noted that the sides of the adapters 30- are extended downwardly beyond the. lower ends of the straps 20 so as to form a pair of spaced cars 34 between which may be pivotally mounted the upper end portions of the cradle 22 by means of a suitable pivot pin or rivet 36. The upper end portions of the cradle 22 are formed with rearwardly extending projections 38-which are engageable with the lower edge of the bight portion of the members 30 when the cradle 22 is substantially horizontal, so that the cradle i effectively prevented from swinging rearwardly on the pivot 36. However, forward swinging of the cradle in the direction of the arrow 40 is. facilitated, such as for example, during walking.
However, in the modified embodiment of the invention illustrated in Figures 8- and 9,v the projections 38 are not provided on the cradle 42, so that swinging of the cradle in both directions is possible. In other words, assuming the cradle 42 in Figures 8 and 9 to remain stationary, the leg strap 20 may swing forwardly and rearwardly as indicated at 44, 46 respectively, while in the embodiment illustrated in Figure 3 the strip, 20' may swing only forwardly as indicated a 8.
Referring now to the construction of the pivot joints 28 which constitute the essence of the invention, the two joints used in the leg brace are similar in construction, so that a description of one will sufiice for both.
Each of the joints 28 consists of a pair of joint members 50, 52 which, like the aforementioned adapter 30, are U-shaped in cross section, whereby the lower end portion of the strap I8 may be secured in the socket provided by the U-shaped configuration of the member 50, such as for example by suitable rivets 54. Similarly, the upper end portion of the lower leg strap 20 is secured in the socket provided by the joint member 52, by means of suitable rivets 56.
The sides of the joint members 50, 52 extend beyond the respective lower and. upper ends of the straps I8, 20, and provide pairs of spaced,
interfitting ears 58, 60 respectively, which are pivotally connected together by a transversely extending pin or rivet 62. By virtue of this arrangement the straps I8, 20 may be swung angularly with the movement of the leg at the knee as is exemplified at 64, 56 in Figure 2. However, it is to be noted that the interfitting bight portions of the joint members 50, 52 are in abutment as at 88 when the straps I8, 20 are longi-' tudinally alined, whereby the straps are pre vented from swinging forwardly of the joint 28.
:. Moreover, means are provided for releasably pawl is pivotally mounted by means of a rivet 18 between the spaced sides of the joint member 50, and it is to be noted that a portion of the pawl projects outwardly from the joint member so as to constitute what may be referred to as a fingerpiece 80.
A stem 82 is pivotally connected at one end thereof at 84 to the finger-piece 80 and is slidable in a guide 86 secured by welding, or the like, to the joint member 50, a suitable compression spring being provided on the stem B2 and bearing against the guide 86 and the finger- .piece 80, wherebythedetent i4 is urged in engagement with the peripheryof the cam piece 10, particularly in engagement with the seat 72.
Accordingly, the engagement of the detent: 14 with the seat 72 will effectively lock the leg straps I8, 20 in longitudinal alinement, but by simply actuating the finger-piece 80 in the direction of the arrow 90 (see Figures 4 and 5) the spring 88 will be compressed while the stem- 82 slides through the guide 86, and the detent 14 will be disengaged from the seat 72, so that the straps I8, 28 may be swung, one relative to the other,
as necessitated by the bending of the leg at the knee. However, after the finger-piece 80 is released and the leg is'straightened, the spring 88 will force the detent '54 into the seat 12, thus automatically locking the straps I8, 20 in their normal, longitudinally alined positions as will be clearly apparent.
Y It'may be explained that the particular concave configuration of the seat 12 and the com- .plementarily convex'configuration of the detent 2,659,479". t" r e g 14 facilitates efficient engagement and disengagement of the detent upon manipulation of the finger-piece 80. It may be also explained that the locking mechanism 10, i6, 82 and 88 may be provided on both joints 28 of the leg brace, or only on one joint, as desired.
Attention is also directed to the aforementioned pins or rivets 62, these being provided with relatively large heads at one end, and carrying at their remaining ends relatively large washers 92, so that these heads and washers substantially reinforce the joints by abutting the interfitting ears 58, 60.
It is believed that the advantages and use of the invention will be clearly apparent from the foregoing disclosure and accordingly, further description thereof at this point is deemed unnecessary.
While in the foregoing there has been shown and described the preferred embodiment of this invention, it is to be understood that minor changes in the details of construction and arrangement of parts may be resorted to without departing from the spirit and scope of the invention as claimed.
Having described the invention, what is claimed as new is: I
In a leg brace, the combination of upper and lower straps, upper and lower joint members each having a substantially U-shaped socket, end portions of said straps being secured in the respective sockets, a pivot pin connecting said members together, a cam secured on said pin in the socket of the lower joint member and provided in its upper edge portion with a concave depression constituting a seat, a pawl'pivotally mounted in the socket of the upper member, a convex detent provided on said pawl and engaging said seat, an apertured guide secured to said upper member above said pawl, a stem pivoted at one end thereof to said pawl and slidable in the aperture of said guide and, a compression spring provided on said stem and bearing' against said pawl and said guide whereby said detent is urged in said seat to lock said members and straps in a predetermined relative position, an end portion of said pawl projecting outwardly from the associated socket and constituting a finger-piece whereby said pawl may be actuated against the resiliency of said spring to disengage'said' detent from said seat.
' t WALLACE L. SLODEK, SR.
REFERENCES- CITED The following references are of record in the file of this patent:
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|U.S. Classification||602/16, 403/62, 602/23, 403/93|