US1444500A - Resilient heel lift - Google Patents

Description

, F. i. GLEASON.

RESILIENT HEEL LIFT.

FILED JUNE 3| 1920.

tion.

Patented l? J'. GLEASON, Cil? CfilvlIlRDGE, LFEASSACEUSETTS, .ASSIGNOR 0F ONE-HALF 'EO M'X BROVJN, OF ESTON, MASSACHUSETTS.

RESILENT Application filed .Tune 3,

To all whom t may concern.'

Be it known that l, envision J. Garrison'. a citizen of the United States, and resident of ainbridge county of Middlesex, Coininonwealth of Massachusetts, have invented an Improvement in Resilient Heel Lifts, of which the following description, in connection with the accompanying drawings, is a specification, like characters on the drawings representing' like parts in each of the several views.

This invention relates to resilient heel lifts and more particularly to lifts of molded and vulcanized rubber or rubber composil-leel lifts of this kind in coininon use have heretofore been produced and supplied to the trade either flat, or in a concavoconveX or like shape. The flat heel lift has the advantage that it is adapted to be fitted to a heel seat without distortion and without tendency to pull away from the securing nails throughout its period of service, but it has the objection that it is difficult to Inake a close joint at all points between it and the heel seat. Hence in applying flat rubber heel lifts it has been necessary to exercise considerable care in the tting and to cement the lift to the heel seat carefully in. order to prevent the appearance of a crack or the pulling away of the lift at certain points from the seat. This objection has led to the extensive use of rubber heel lifts molded to a normally concavo-convex or like shape which require to be pressed down from this shape and held flat against the heel seat by the securing nails. This has achieved the result of a constant pressure and close engagement of the lift edges against the heel seat but it has been subject to the serious objection that since the lift must be distorted from its normal shape in nailing it tothe heel seat it is impossible either to make it lie perfectly flat against the attaching surface or to present a flat wearing surface. This has particularly been the case in the use of tough and live rubber, i. e., high grade stock, for the heel lifts and heel lifts of the concave-convex type are hence constantly tending to draw away from the securing nails and to work loose, as well as being imperfectly applied owing to the inevitable distortion.

l have found that a heel lift may be pro-l duced perfectly or substantially fiat throughout its inaj or body portion and including its 11.920. Serial No. 386,282.

enire rear portion, and by molding and mucanizing the saine with the forward co ier tips turned up a proper angle, the l .i as nailed to its seat will lie closely and evenly against the seat without tendency to pull away and without distortion. This is for the reason that the only parts of the lift where there is any appreciable tendency to pull away froin the seat are at the forward corner portions, and these are l against the heel seat and flattened pressen these corner portions of the lift are caused to press tightly against the supporting base as to inalre a close joint around the corner portion of the lift7 preventing dirt from getting thereunder and allowing the natural. resiliency of the rubber to press the saine 'back in place whenever the corners come in Contact with obstacles. it the saine time the resilient pressure of these corner tips is not sufficient to have any appreciable effectn tending to press the lift as a whole away froin its seat and the major body portion of the lift lies perfectly fiat against its seat without any distortion or tendency to pull away frein its securing nails. The foregoing and other objects and advantages of the invention will incre fully appear from the following detailed description, and the distinctive features of novelty will be thereafter pointed out in the appended claims.

Referring to the drawings:

Fig. l is an elevation of a heel lift einbodying the invention7 viewing the wear surface thereof;

Fig. 2 is a front view thereof;

F ig. 3 is central longitudinal section on line of Fig. l; and

l is a side view,

rlhe major body portion of the lift including its entire rear portion is preferably made perfectly flat7 this being the portion designated 10. In the molding of the lift the breast or forward corner tip portions ll, l2 are turned up at a substantial angle. The extent ofthe corner portions thus turned up is preferably, though not necessarily, deterininedrby lines drawn from 'the longitudinal. axis lor transverse center 18 of the breast edge of the lift diagonally backward to a point 14e which is spaced froni the front corners l5 of the lift the saine distance that these corners are from the point l8,-i. e., the lines 13, le frorn which the tips are inclined are at approximately a fortyhye degree angleito the front edge ofthe heelat its central point 13. By turningup' the tips along these forty-live degree diagonal lines,

it will bel noted that'thetwo sides 13, 15,

and 14, 15 of each tip will remain symmetrical and of equal length regardless of the extent to which the lift may be trimmed down in fitting. it to the heel seat. The ein tent to which these corner tips'are turned up. may be varied according` to the nature definite lines 13, 14- which may be' grooved into the body of the rubber to a greaterl or less extent, this slightly weakening and predisposing the` material to bend as the tips are ilatten'ed, along these definite lines. l

" also "preferably, though not necessarily,`make the tip'portions 11, @substantially flat in their inclined relation from the lines 13, 1l. The invention is however not to be understood as limited in these structural details and in general the present embodiment is to be understood'. as merelyillustrative and not restrictive, reference being' had to' the appended claims rather than to the foregoing description to indicate thescope of the invention.

Having described my invention, what l claim as new and desire to secureby Letters Patent is:

l. A' resilient heel lift having a major body and rear portion substantially flat and with breast corner tip portions inclined diagonally upward with vrespect to the longitudinal axis oi' the wheel for tliepun pose stated.

2. i rubber heel lift having. its major and rear portion substantially fiat, and with front corner tip portions inclined upward with respect thereto along lines extending diagonally rearward from the center oi the heel breast 3. A rubber heel lift having its major and rear portion substantially flat, and with iront corner tip portions inclined upward with respect thereto along lines extending diagonally rearward from the center of the heel breast at approximately forty-five degree angles.

ln testimony whereof, l havesigned my name to this sl eciiication.

FR DERICK J. GLEASON.

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