US1057562A

US1057562A - Pneumatic cushion for stump-legs.

Info

Publication number: US1057562A
Application number: US63461411A
Authority: US
Inventors: Joseph G La Point
Original assignee: Individual
Current assignee: Individual
Priority date: 1911-06-21
Filing date: 1911-06-21
Publication date: 1913-04-01
Anticipated expiration: 1930-04-01

Description

J. 5 LA POINT. PNEUMATIC CUSHION FOR STUMPVLEGS.

APPLICATION FILED JUNE 21, 1911.

Patented Apr. 1, 1913,

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I }TNESSES% I JOSEPH G. LA POINT, 01E NEW ALBANY, INDIANA.

PNEUMATIC CUSHION FOR STUMP-LEGS.

Specification ofletters Patent.

Patented Apr. 1, 1913.

Application filed June 21, 1911. Serial No. 634,614.

To all whom it may concern I Be it known that I, Josnrn G. LA POINT, a resident of New Albany, in the county of Floyd and State of Indiana, have invented a new and Improved Pneumatic Cushion for Stump-Legs, of which the following is a full,--clear, and exact description.

The object of the invention is to provide a simple and effective cushion for a stump leg to support it easily within the shell and against the upper edge of the shell of the artificial leg. V

The invention consists of novel features and parts and combinations of the same, which will he more fully described hereinafter and then pointed out in the claim.

A practical embodiment of the invention is represented in the accompanying drawings, forming a part of this specification, in which similar characters of reference indicate corresponding parts in all the views.

Figure 1 is a vertical section showing the shell and the cushion in position on the stump leg; Fig. 2 is a perspective view of the stump leg and cushion wrapped thereon before it has been covered by the outer stump sock; and Fig. 3 is a. perspective view of a modification of the pneumatic cushion.

A stump leg, is ordinarily supported several inches above its'end against 'theinncr wall and the upper edge of the shell of the artificial leg. Heretofore pneumatic coils have been used within the shell tosupport the stump therein, and a. specially placed pneumatic coil has been'used to support the stump against the upper edge of the shell. This arrangement is very expensive, causes undue pressure against the stump at theupper edge of the shell, and requires two different pieces, specially arranged, to give the support in both places.

- An ordinary pneumatic bladder, in the form of a sleeve will not produce thedesired results, because it is too easily displaced lengthwise.

By using a pneumatic sleeve 3, provided with a valve 4 to support the stump 1 against the shell 5, in which the outer wall, or both walls, is made of rubberized silk or other stiffened non-elastic, flexible, air-tight material, I provide a pneumatic cushion in which the air will not be all pushed outside the shell and which will form a widened ring, as shown in' Fig, 1, to support the stump against the upperedge. of the shell and hold it securely in place vertically.

The pneumaticcushion 3 should be placed on the stump outside an inner stump sock 2 and should be covered by an outer stump sock (i as shown'in Fig. 1.

In the preferred form of my invention I split the cushion 3 lengthwise, as shown in Fig. 2, so that it can be wrapped around the stump like a bandage after it is inflated. The cushion. may also be made with its Walls in the form of a portion of a conical surface as shown in Fig. 3.

I do not limit myself to the exact form in which my invention is herein disclosed further than is indicated in the claim which follows.

I claim:

A pneumatic stump support consisting of a rectangular inflatable cushionof. greater length than the circumference of the leg, so

that it may be overlapped, said cushion being extended over and resting upon the up pier edge of the leg socket and furnished .with a valve at its upper edge.

' JOSEPH G. LA POINT.

Witnesses: I

. KATHERINE ARNETT, LULA L. BALLWEY.