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Патент USA US2403592

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July 9, 1946.
“ 2,403,592
Filed Oct. 17, 1944
15/1; '
Patented July 9, 1946
Arthur Fisk, New York, N. Y., assignor of one-half
to Bradley Mahler, Detroit, Mich.
Application October 17, 1944, Serial No. 558,982
1 Claim. (01. 36—36)
This invention relates to detachable treads for
One of the objects of my invention is to pro
date and tightly hold said raised portion. A
recess 22 in the concave wall of said tread por
tion 20 receives lever I8 when the latter is in
depressed or engaging position.
The clamp performs two functions in this con
struction: by virtue of its gripping pressure it
artisan for such replacement.
holds tread member I I snugly against heel mem
Another object is the provision of a tread mem
ber I0, and .by Virtue of its rounded but non
ber for heels which is interchangeable between
circular shape it prevents rotary movement of
the right and left shoes, thereby rendering it
possible to equalize the normally unequal wear 10 said tread member about its vertical axis.
The embodiment shown in Figs. 4 and 5 is
of heel tread members.
identical with the ?rst embodiment except in
A further object is the provision of a tread
two respects: The recess 25, clamp 26 and raised
member for heels which carries no metal fasten
portion 21 are circular rather than non-circular
ing devices such as nails which can protrude
through the wearing surface of the tread mem_ 15 in shape, and a plurality of inwardly projecting
lugs or teeth 28 on the side walls of the clamp
her when the latter is worn down.
enter correspondingly shaped and spaced re
Other objects will become apparent from a
reading of the speci?cation.
cesses 29 in the side of raised portion 21. In
Two preferred embodiments of the invention
this embodiment, these teeth prevent rotary
are illustrated in the accompanying drawing in 20 movement of the tread member relative to the
It will be appreciated that the constructions
Fig. 1 is a longitudinal vertical section of the
thus described are but preferred embodiments of
first of said embodiments;
the invention and that modi?cations thereof may
Fig. 2 is a horizontal section thereof on the
line 2—2 of Fig. 1;
25 be had without departure from the basic prin
Fig. .3 is a longitudinal vertical section of the
ciples of the invention.
For example, the clamp may be provided with
tread member of the said embodiment;
other non-circular shapes. The particular shape
Fig. 4 is a horizontal section of the second of
is not important as long as it is non-circular
said embodiments on the line 4—4 of Fig. 5; and
Fig. 5 is a longitudinal vertical section of 30 and without sharp corners around which it
would be dif?cult to draw wire H. The construc
said second embodiment.
Referring now to Figs. 1 to 3 inclusive,v the
tion may be reversed without any ‘violence
whatsoever to the principles of the invention by
heel construction includes a ?xed heel member
ai?xing the clamp to the tread member and
Ill and a detachable tread member II. A recess
I2 of. substantially the same shape as the heel, 35 providing the heel member with a downwardly
vide a tread member for heels which can readily
be replaced without the employment of a skilled
is formed in the bottom of the heel. Ai?xed ’
in said recess by means of screws I3 is a clamp
M which conforms to said recess in shape and
projecting portion which the clamp would be
adapted to receive. The device may be made
an integral part of the shoe at the factory or
it may be attached to ordinary shoes by the ulti
dimensions. The clamp is provided with verti
cally slotted, contractible walls I 5 which are 40 mate consumer, as a worn tread replacement.
turned back upon themselvesto form a hollow
peripheral bead I6. A draw-in wire I‘! having
A heel construction comprising a ?xed heel
hooked free ends is carried by said bead. A
member and a detachable tread member, said
cam-faced lever vl8 engages said hooked ends
heel having a recess in the bottom thereof and
and draws them together thereby causing con 45 a circular contractable clamp in said recess, said
traction of the clamp walls.
tread having a raised circular upper portion
The detachable tread member ll comprises a
which said clamp is adapted to engage, said
tread proper 20 having a raised upper portion
clamp being provided with inner teeth which
engage correspondingly spaced and dimensioned
2| which conforms in shape and dimensions to
the space de?ned by the inner walls of said 50 recesses formed in said raised circular portion.
clamp, said clamp being adapted to accommo
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