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Патент USA US3049808

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Aug. 21, 1962
Filed April 6, 1959
BY 66,“ ¢ m‘:
United States Patent 0 ” 1C6
Patented Aug. 21, 1962
As shown in the drawing this connection comprises, as
previously described, the usual T headed stud 8 supported
by the drum shell, not shown, on which the shoe, a por
Albert P. Denis, Spring?eld, Mass; Marguerite D. Sulli
van, administratrix of said Albert P. Denis, deceased,
tion of which is shown at 9, is mounted, the stud 8 being
assignor of one-fourth to Marguerite D. Sullivan, one
surrounded by coiled spring 10 and the cap 7 having a
fourth to Dorothy D. Coleman, both of Spring?eld,
slot 11 through Which the cross bar 12 of the stud is
one-fourth to Mary B. Denis, Holyoke, and one-fourth
passed, the cap 7 being turned to position slot 11 out of
to Robert B. Denis, Longmeadow, Mass.
alignment with the cross bar 12 thus holding the spring
Filed Apr. 6, 1959, Ser. No. 804,351
under compression. This is the position of the parts
1 Claim. (Cl. 29-227)
10 shown in FIG. 1.
This invention relates to an improvement in tools for
In operation, as shown in FIG. 1, the jaws of the tool
removing the slotted cap and spring which are commonly
are closed over the cap 7 to position it in the channels
used to hold the brake shoe to the brake drum of auto
of portion 6. The jaws of the tool are each provided with
motive vehicles. In the brake construction to which the
extensions 13 which, when the cap is embraced in the
tool applies the brake shoe is provided with a small open 15 channel portion 6 extend downwardly along and over the
ing through which a T headed stud extends. A coiled
sides of spring 10' but slightly spaced therefrom.
spring is telescoped over the stud and a metal cap pro
With the cap so held the latter may be rotated to bring
vided with a slot is pressed over the spring with the slot
in the cap in alignment with the cross bar of the T head
the slot 11 into alignment with cross bar 12 and the tool
moved downwardly to compress the spring as shown in
until the bar of the head has passed through the slot 20 FIG. 2.
after which the cap is turned to position the slot at an
angle to the head, thus locking the cap in place with
the spring under compression to yieldingly hold the brake
shoe in place.
As the spring is compressed its diameter in
creases slightly and the sides of the spring are engaged
and held by the extensions 13, as shown in FIGS. 2 and 3
so that the cap and spring may be removed as a unit, the
bar 12 passing freely through the aligned slot 11.
The removal and replacement of the cap and spring for 25
The depth and width of the channels in portion 6 are
repair or servicing of the brake assembly is accomplished
preferably such that after the cap has been gripped and
with some di?iculty and various tools have been proposed
turned the clamping pressure may, if desired, be slightly
to facilitate the work.
released and the downward pressure, ‘as viewed in FIG. 2,
In general these tools provide means for engaging the
to compress the spring exerted by the upper side walls of
cap for the purpose of compressing the spring and turn 30 the channels, thus giving added assurance of ‘free move
ing the cap to bring the slot in the cap into alignment with
ment of extensions 13 over the sides of the spring and
permitting su?‘icient subsequent closure of the jaws, after
the bar of the T headed stud permitting application or re
moval of the cap and spring.
the spring has been axially compressed, to apply addi
tional sidewise pressure to further assure clamping control
It is desirable to apply or remove both cap and spring
simultaneously and various means have been proposed to 35 of the compressed spring by the extensions 13.
By the described structure the spring is axially uniform
this end but with the presently available tools the means
provided are either unreliable or interfere with the uni
ly compressed without interference from the extensions
form compression of the spring or both.
13. The cap and spring can be removed as a unit and
after removal the gradual release of the closing pressure
It is the principal object of the invention to provide a
tool which is free from the objections mentioned and 40 of the pliers will permit controlled release of the uni
which is easily used by relatively unskilled operators.
formly compressed spring.
Other and further objects residing in the details of the
construction are disclosed in the accompanying drawing
and the following speci?cation and claim.
cap and spring, since the spring may be assembled with
the cap and compressed against a flat surface, the so‘com
In the accompanying drawing:
The tool equally facilitates application of the holding
FIG. 1 is an elevational view partly in section, of a
pressed spring, being held in assembled relation with the
cap by the extensions 13, the assembly may be slipped
tool embodying the invention, shown as applied to the
spring holding cap at the start of a removal operation;
over the stud v8 and rotated to locking position after which
portions as at 5 to form a plier type tool.
prising opposed members substantially spaced from each
other when in work engaging position, the work engaging
faces of the jaws being each provided, adjacent the free
the assembly may be released from the pliers.
During both removal and application of the cap and
FIG. 2 is a fragmentary view similar to FIG. 1 but with
the spring compressed and the cap and spring ready for 50 spring the operator has an unobstructed view of the head
of the stud to manipulate the cap from and to locked
removal; and
relation with the head of the stud.
FIG. 3 is a sectional view substantially on line 3——3
What is claimed is:
of FIG. 2.
A plier type tool for holding, in coaxial assembly, a
Referring to FIG. 1 the tool is shown as comprising
two strips of metal generally indicated at 1 which have 55 cylindrical cap and a cylindrical coiled spring of smaller
diameter than the cap, for application and removal of the
been shaped to form handle portions 2, substantially flat
assembly as a unit to and from the stud on which a brake
portions 3 and working end portions generally indicated at
shoe is mounted, the work engaging jaws of said tool com
4, the so-shaped strips being pivoted together at their ?at
The working end portions 4 each comprise channel 60
portions 6, the open sides of the channels opposing each
other and dimensioned to freely embrace opposite edge
portions of the holding cap 7 of the brake shoe connec
tion which is to be released.
end portions of the jaw, with channels, in the form of an
nular segments extending transversely of the jaws, to re
ceive, and make gripping spanner engagement with op
posed segmental portions of the cap member of the cap
and spring assembly for the application of torque to the
cap, the inner side walls of the channels extending en—
‘gageably over the top of the cap member and thereby
providing means whereby axial pressure may be applied
to the cap inwardly of its periphery by manipulation of
the tool, both before and after maximum closure of the
jaws on said cap member, the free end portions of the
jaws being formed with transversely arcuate surfaces po
sitioned to engage and grip the spring member of the as
sembly to hold the cap and spring in assembled relation 10
against the inner side Walls of the channels When the
latter are in spring compressing engagement with the cap
References Cited in the ?le of this patent
Jones __...1 ____________ __ Apr. 26, 1938
Plumley ______________ __ Feb. 12, 1946
France _______________ __ Dec. 4, 1923
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