US1305867A

US1305867A - Crutch-tip

Info

Publication number: US1305867A
Authority: US
Publication date: 1919-06-03
Anticipated expiration: 1936-06-03

Description

M. ATLAS.

CRUTCH m. APPLICATION FILED SEPT-14,1918.

Patented June 3, 1919.

Max Atlas.

MAX ATLAS, or JACKSONVILLE, FLORIDA.

CRU'I'CI-I-TIP.

Specification of Letters Patent.

Patentod June 3. 1919.

Application filed. September 14, 1918. I Serial No. 254,138.

To all whom it may concern:

Be it known that I, MAX ATLAS, a citizen of the United States, residing at J acksonville, in the county of Duval and State of Florida, have invented new and useful Improvements in Crutch-Tips, of which the following is a specification. I

This invention relates to crutches, particularly to tips therefor, and has for its ob ect the provision of an attachment which may be quickly and easily engaged upon the usual rubber tip holder and provided with a plurality of spikes or prongs whereby slipping I of the crutch will be prevented when used upon snow, ice or other slippery surfaces.

An important object is the provision of an attachment of this character which is so constructed that the parts may be readily assembled or disassembled for engagement upon or removal from the holder of the ordinary rubber tip.

A further object is the provision of a device of this character which will be extremely simple and inexpensive in manufacture, highly eiiicient in service, durable in use and a general improvement of the art.

With the above and other objects and ad vantages in view, the invention consists in the details of construction to be hereinafter more fully described and claimed, and illustrated in the accompanying drawing, in which 2-- Figure 1 is a side elevation of the lower part of a crutch showing my device applied thereto;

Fig. 2 is a longitudinal sectional view and Fig. 3 is a bottom plan view.

Referring more particularly to the drawing the letter A designates the lower portion of a crutch which is provided with the usual metallic ferrule B provided with a threaded recess C in which is engaged the shank D of the holder E which carries the usual rubber tip F. The above described parts are old and well known and form no portion of the present invention.

My attachment is designated as a whole by the numeral 5 and comprises a cylindrical socket member 6 having a concavo-convex bottom 7 and having an internal diameter substantially the same as the diameter of the rubber tip F. At its upper end, the socket member 6 is externally threaded as shown for engagement of an internally threaded ring 8 which is provided at its upper end with an inwardly extending flange 9 engageable upon the rubber tip'holder E.

Extending downwardly from the center of the bottom? is a relatively long spike or prong 10 which is surrounded by a plurality of concentrically arranged relatively short spikes 11 which have their axes extending radially from the center of curvature of the concavo-convex bottom wall 7 of the socket member. v

In the use of the device, in order that it may be attached to the crutch, it is first necessary that'the operator grasp the rubber tipholder E and unscrew the shank D from within the socket C. The ring 8 is then slipped over the holder E whereupon the inwardly extending flange 9 will engage upon the top thereof, after which the socket member 6 is disposed over the rubber tip F. The ring 8 is then turned and screwed tightly onto the socket member 6 to hold the parts in assembled position. It is preferable that the dimensions of the parts be such that when the device is in applied position the upper end of the socket member 6 will terminate short of the bottom edge of the holder E so as not to interfere with the cushioning action of the rubber tip F. The provision of the

spikes

10 and 11 upon the bottom wall of the socket member will insure the device against slipping when used upon snow, ice or other slippery surfaces, and owing to the fact that the spike members 11 diverge slightly it will be obvious that slipping in any direction will be prevented.

From the foregoing description and a study of the drawing it will be seen that I have thus provided an extremely simple and inexpensive attachment which may be quickly and easily applied to a crutch and which will very efi'ectively prevent any slipping thereof.

While I have shown and described the preferred embodiment of the invention, it will of course be readily understood that I reserve the right to make such changes in the details of construction as will not depart from the spirit of the invention nor the scope of the subjoined claims.

Having thus described the invention I claim 1. In combination with the rubber tip holder of a crutch, a non-slipping device comprising a socket member engaged exteriorly upon the rubber tip, a plurality of spikes projecting from the bottom; of said socket member, and a retaining ring connected with said socket member and provided with an inwardly extending flange crutch; a non-slipping dey lce comprising a socket member disposed -upon the tip and bearing against the end thereof with its wallsdisposed in spaced relation to the sides of the tip,the upper end of said socket ter minatingshort of said enlarged portion,

spikes extending from the bottom of said socket member, and. a ring threaded upon the upper end of said socket member and provided Wi hin rdly ex nding flange slidably g g ngthe crutch ereby said tip may retain its cushioning action,- said flange e gag g aidenla ged piorti n o ber from said tip.

3. A non-slipping attachment for the rubber tip and its holder of a crutch comprising socket member engageable upon the rubber tip and having a concavo-convex bottom engaging against the bottom of the tip, a ring threaded upon the upper end of said soeket. member anddisposed in slidably encircling relation to the rubber tip holder and provided with an inwardly extending flange at its upper end slidably: engaging upon the crutch above-thetop of said holder, and a plurality of; spikes extending downwardly fronithe bot-tom 0t said socket member and having their: axes extending radially from AX ATLAS.

Qopies of} this patent may, be obtained; for five cents each, by addressing; theqommissioner of Patents,

washington p. 0.?