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Патент USA US3042401

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July 3, 1962
J. GLASER
3,042,391
COMPRESSION SPRING
Filed Sept. 25, 1959
INVENTOR.‘
JERRY GLASER,
A rfomey.
ite
tates
atent
‘s:
5.
f?ce
1
3,412,391
Fatented July 3, 1962
2
The spring may be formed from a tube with the slots
3,042,391
.lerry Glaser, Los Angeles, Calif., assignor to The Gar
' machined therein or may be stamped from a ?at sheet
COMPRES§ION SPRING
and rolled into its tubular form. Grinding or machining
operations may be desirable to insure that the surfaces of
the end thrust lugs are normal to the axis of the spring
rett Corporation, Los Angeles, Calif., a corporation of
California
Filed Sept. 25, 1959, Ser. No. 842,255
6 Claims. (Cl. 267-1)
and heat treating of the completed spring for strength
may be desirable with a ?nal normalizing grinding opera
tion after heat treatment. Again, these elements of con
struction and formation are ?exible within the desired
This invention relates to a compression spring and has
for its object a precision compression spring which will 10 requirements of spring operation.
maintain normality of the end thrust with respect to the
While the speci?c embodiment of the invention illus
axis of the spring so as to apply a symmetrical load.
' trated in the drawing is comprised of three sectors 7,
Another object of the invention is a compression spring
which will avoid twisting or rotational ‘forces incident
to its compression or extension.
Another object of the invention is a compression spring
providing a substantially uniform linear spring rate which
may be varied within relatively wide limits.
A still further object of the invention is a compression
spring in accordance with the preceding objects which
that is, three groups of the spring elements 8, it is obvious
that the number of separations is not limited to three
15 and that two or more than three groups of elements may
be utilized in the spring design according to perform
ance requirements.
While certain preferred embodiments of the invention
have been speci?cally disclosed, it is understood that the
invention is not limited thereto, as many variations will
be readily apparent to those skilled in the art and the in
will have a low spring rate, Le. a small force will cause a
relatively large de?ection.
vention is to be given its broadest possible interpretation
consistent with the prior art.
Other objects and features of the invention will be read
ily apparent to those skilled in the art from the speci?ca
tion and appended drawings illustrating certain preferred 25
embodiments in which:
FIG. 1 is an isometric view of a compression spring
What is claimed is:
1. A compression spring of generally tubular construc
tion comprising: spaced annular end members; a plurality
of individual axially extending segments circumferential
according to the present invention;
ly spaced apart by axial slots and disposed between said
FIG. 2 is a fragmentary view similar to FIG. 1 and
annular end members, each of said segments including a
30 plurality of spaced, parallel, circumferentially extending
showing a modi?ed construction.
In the speci?c embodiment illustrated in FIG. 1 the
elements connected at alternate ends in a substantially
spring is given the general reference numeral 1 and is of
zigzag formation; and means securing said individual seg
generally tubular construction with opposite end thrust
ments to said annular end members.
annuli 2 and 3 having a plurality of thrust lugs or ex
2. A compression spring of generally tubular construc
tensions 4 thereon. The body portion of the spring is pro
' tion comprising: spaced annular end members; a plurality
vided with a plurality of parallel discontinuous circum
of individual axially extending segments circumferentially
ferential slots 5 and with a plurality of circumferentially
spaced apart by axial slots and disposed between said an
spaced axially extending slots 6. The axially extending
nular end members, each of said segments including a plu
slots 6 divide the body of the tubular spring into three
rality of spaced, parallel, circumferentially extending ele
separated sectors generally designated at 7. The slots 5
ments connected at alternate ends in a substantially zig
divide the material in the sectors 7 into a plurality of par
zag formation; and means securing said individual seg
allel circumferential elements 8 and the discontinuities in
ments to said annular end members, said means com
the slots 5 provide the elements 8 with end ties 9 joining
prising end ties extending from the element adjacent the
alternate opposite ends of the elements 8 with their ad
respective annular end member to said end member.
45
jacent counterparts.
3. A compression spring of generally tubular construc
The resultant group of parallel elements 8 within each
tion comprising: spaced annular end members; a plu
of the sectors 7 are thus, with end ties 9, of substantially
rality of individual axially extending segments circum
zigzag con?guration. The extreme elements 8 are con
nected to their adjacent thrust annuli 2 and 3 by end ties
ferentially spaced apart by axial slots and disposed be
tween said annular end members, each of said segments
11 and 12, respectively. As illustrated in FIG. 1 the ties 50 including a plurality of spaced, parallel, circumferentially
11 and 12 are formed at the same side of each of the
extending elements connected at alternate ends in a sub
groups of elements 8 in each of the sectors 7.
stantially zigzag formation; and means securing said in
In the modi?cation of FIG. 2 the end tie 12 has been
dividual segments to said annular end members, said
moved to the opposite side of the group of elements 8
means comprising end ties extending from the element
55
and is here ‘shown at 13. In this construction the end tie
adjacent the respective annular end member to said end
11 remains in the position shown in FIG. 1 so that in the
member, said end ties being located at the same side of
each of the segments.
modi?cation of FIG. 2 the group of parallel elements 8 is
connected to the end thrust annuli at opposite sides of the
4. A compression spring of generally tubular construc
group. FiG. 2 illustrates a further modi?cation in the
tion comprising: spaced annular end members; a plurality
60
position of the end thrust lug 4 which has now been moved
of individual axially extending segments circumferentially
into the position shown at 14 opposite the end tie 13,
whereas in FIG. 1 the’ thrust lugs 4 are shown centrally
of the group of parallel spring elements 8.
posite sides of the group may be used with the thrust lug
position of FIG. 1 and conversely the thrust lug position
of FIG.
plurality of spaced, parallel, circumferentially extending
elements connected at alternate ends in a substantially zig
zag formation; and means securing said individual seg
ments to said annular end members, said means compris
ing end ties extending from the element adjacent the re
2 may be used with the end tie arrangement of
spective annular end member to said end member, said
The versatility of these arrangements contri
end ties being located at opposite sides of each of the
the wide variation in spring characteristics which 70 segments.
designed into the spring construction to cover
5. A compression spring of generally tubular construc
The tieing of the groups to the end thrust annuli at op
FIG. 1.
butes to
may be
spaced apart by axial slots and disposed between said
annular end members, each of said segments including a
varying service requirements.
65
tion comprising: spaced annular end members; a plurality
3,042,391
3
A
of individual axially extending segments circumferential
ly ‘spaced apart by axial slots and disposed between said
elements connected at alternate ends in a substantially
zigzag formation; means securing said individual segments
to said annular end members, said means comprising end
ties extending from the element adjacent the respective an
nular end member to said end member; and end thrust
annular end members, each of said segments including a
plurality of spaced, parallel, circumferentially extending
elements connected at alternate ends in a substantially
zigzag formation; means securing said individual seg
ments to said annular end members, said means compris
ing end ties extending from the element adjacent the re
spective annular end member to said end member; and
end thrust lugs extending from said annular end members
intermediate said end ties.
6. A compression spring of generally tubular construc
tion comprising: spaced annular end members; a plurality
of individual axially extending segments circumferentially
spaced apart by axial slots and disposed between said 15
annular end ‘members, each of said segments including a
plurality of spaced, parallel, circumferentially extending
lugs extending from said annular end members adjacent
said end ties.
'
References Cited in the ?le of this patent
UNITED STATES PATENTS
993,208
Watson et al. ________ __ May 23, 1911
1,541,124
Dunham ____________ __ June 9, 1925
1,090,004
France ______________ __ Oct. 13, 1954
FOREIGN PATENTS
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