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Патент USA US2405925

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Àug. T3, 1946.
lo. J. PouPlTcl-i
‘
'
2,405,925 `
FASTENING DEVICE
Filed Feb. 23, 1944
y 2 sheets-*sham> l1v
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Q_ J, POUPlTCH
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FASTENING-
DEVICE
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2,495,92
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‘
Filed Feb. 25, 1944
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2,405,925
Patented Aug. 13, 1946
UNITED .STATES PATENT OFFICE
-Ougljesa Jules Poupìtch, Chicago, lll., .assìgnor
-to Illinois Tool Works, Chicago, Ill., .a corpora.- -
tion of Illinois'
ApplîcationlFebruany'ZS, 1944, -Serial No. l5235501
7 claims; (c1. iai-.38)
1
.
2
,
Figure :5 _is a viewsimilarto Figure :3 Vdisclosing
This :invention relates generally vto fastening
devices and,’more particularly', to fastening de
vices whereinza .portion thereof is .formed .of sheet
metal stock which is designed to accommodate
theassem'bled :parts 4ñrmly vclamped together.
,Figurefßis :a‘perspective view `of the nut andr
sheet :metal 'retainer `means ytherefor disclosed in'
disassembled relation.
an .internally threadedzmember :or nut.
Figure `'7 iis `a plan view of 'a >sheet 4metal blank
It. is ¿an important yobject ofthe present inven
tion to `provide a fastener which .may be 1em
ployed 'to effectively secure a screw member
from which lthe Vnut .retaining vstructure ‘of theV
nut :and a companion ’screw member so as to `se
mentary scre'w'member.
preceding ñguresßmayïbe produced.
,
Figure .8 is 'a perspective view of aslightlyrmod
against loosening, vand :to this end the invention
contemplates ía sheet :metal section providing ya 10 ined :form :of nut provided with .a longitudinal
lslot which enables 'the nut 'to :be :slightly con»
resilient -bridge section ¿for supporting abut-mem
tracted and thereby increase the locking ieiïec
ber, the ¿resiliency of the bridge serving :to es
tiveness of the nut. with- .respect to'its comple
tablish .-suñicient frictional resistance between Athe
fastener construction contemplated :by the pres
tation.
ent V'invention A’in the 'form .of :a two-'part'znu’t de
More specifically, the invention contemplates `a'
fastening'device as set forth :above wherein a nut
member carried by .a bridge section provides .an
effective abutment toiinsure complete tightening
,
Figure 9 -is :a `perspective view "of va modiñed
cure the parts against inadvertent :retrograde .ro
vice.
.
’
.Figure 10 lis `a vertical sectional' view .taken
zo
of a complementary screw element without com~
pletely flattening the bridgesection.
substantially along `the lin‘e :l0-¿lll of `‘Figure v9V
with a nut. element shown in operative associa
tion therewith prior ‘to ñnal clamping.
Figure 11 is a transverse sectional lview -taken
.It is a further object 4of the present invention
substantially along the _line Alili-.H of Figure ‘10.
to provide -a :fastener of extremely simple and
practical -construction wherein Ia nut :member Eis 25 A.Figure ‘l2 .iis fa view similar to Figure 1l :after
the ' parts .have fbeien .firmly clamped >to "the -work-'
detachablv associated with .a resilient bridge `sec
piece >illustrated byxdot V'and A.dash lines.
tion as referred to Vabove and, accordingly, it fis
Figure >13 ¿is :a -perspective `view 'of -the retainer
proposed to interlock the nut 'member .and bridge
and inut :member in idisassociated :.relation.
section against relative rotation.
'Figure 14 is a view asimilar to Figure `I0 -dis
The invention -also contemplates .a v‘fastening
closing .a >nut element which is :provided Iwith Ja
arrangement rwherein the »constituent parts
thereof may be very economically produced and
subsequently 'assembled in avery simple and eX
peditìous manner.
The foregoing and other >objects‘zand:advan
tages will be ¿more yapparent from .the following
detailed description when considered in connec
tion with the accompanying drawing-s wherein:
flange, the underside .of which :is curved to .fa
the ñexed .tightened position of .said ¢bridge mem
. ber being 'illustrated by dotted lines.
Figure A15 is :a `perspective view :of the ¿nut re'n
taining structureshown'in .Figure 14.
'
Figure 16 is va sectional view similar to Figure
14 V’illustrating the manner in ‘which the upper
portion of the lnut retaining `structure `may be'
provided with a .cam-.like boss yportion to .facilitate
Figure 1 is a perspective view of a pair »of
plates secured together by -a fastener device em
bodying features of the present invention.
flexing Àof .the sheet metal vbridge member 'when
the parts are tightened in position, 4the final
Figure 2 is -an enlarged elevational view of the
fastener device shown in Figure 1 and as viewed
tightened‘p'osition ‘occupied ìby the resilient bridge
from .the rear of `Figure 1.
member being illustrated in dotted lines, and '
_
.Figure 3 is .a transverse sectional view taken
substantially along the line v3_3 of Figure 2, the
tional lview taken along the lines vl-’l---ll of.
associated members being shown .prior to the
Figure 1‘6.
final tightening of the screw within the nut sup
ported by the resilient bridge.
,
lReferring now to the drawings wherein .like
5,0 numerals have 'been employed to designate Ísirn
Figure 4 is a transverse sectional view taken. A
ilar'parts throughout the various iigures, it'Will`
be seen that one embodiment of the invention.
along >the line 4-4 of Figure 2 Vdisclosing `the
screw Aand .its ~complementary lnut tightened in
isy disclosed in Figures l to '7, inclusive. The
fastener shown inA these figures comprises va sheet
position so as to firmly secure the two work sheets
together.
. ' -
Figure v1'? is va Yfragmentary transverse .sec
55
metal nut retainer member or means designated
2,405,925
3
generally by the numeral 20 and a comple
mentary nut member 22 supported by the re
»
4
The aperture »48 is of such size as to permit the
free insertion< of the reduced portion 50 of the
nut 20 when the spring 40 occupies its flattened
portion 24 provided with apertures 26 at opposite
state, and when said spring is sprung to its nor
extremities (Figure 6) to accommodate rivets 28. 5 mal curved position as illustrated in Figure 3, the
These rivets 28 serve to secure the nut retainer
edges of the stock deñning the aperture 48 fric
tainer.
The retainer member 20 includes a base
upon one of a pair _of sheet _metal „workI pieces
30 and 32 'asl-clearly illustrated v'in the drawings.
The central >portion of the base is provided' with
tionally bear against the complementary side
surfaces of the nut section 50' and thus secure
the parts against inadvertent separation.
an aperture 34 to accommodate a threaded screw 10 AIn Figure 8 a slightly modified nut is shown.
member 36, the head 38 of which is adapted tol
be clamped against the outer surface of the~work_ ,
piece 32 when finally tightened in position< as
clearly illustrated in Figure 4.-' Formed Aintegral
with the base 24 and disposed in superimposing
relation with respect to said base, is a spring
member or portion 40. This 'spring 40 is main-l
tained in spaced relation with respect to thev
plane of the base 24 byan integral spacing sec
tion 42 on one side and overlapping spacing sec
tions 44 and 4B on thefother side, the section
4S being formed integrally with and bent out
wardly from the base 24 and the section 44 be
ing formed integrally with the spring 4D at the
free extremity thereof. The spaced section 46 is
preferably bent over the spring 40 suirlciently'to
.prevent outward dislodgement or displacement of
the free extremity of the spring 40.
.
'
The nut of Figure 8 is similar in structural de
tails to the nut 22, except that a longitudinal
slot 52 is provided. With this construction the
nut partakes of the nature of a collet and when
it is tightenedin the position shown in Figures
4 and 5, the tendency for the nut to be sprung
to a smaller Vdiameter due to the crowded action
of the spring 4U introduces additional frictional
gripping upon the rotation of the screw 36.
Thus, in addition to the resilient friction de
veloping action of the spring 40 the nutfbody
itself is resiliently urged into gripping relation
with the thread convolutions of the screw 38. Í -
In Figures 9 to I3, inclusive, a slightly modi
iied fastener device is shown which includes a
sheet metal retainer member or means 20a. which
accommodates a nut 22a. The retainer 20min
cludes a base-portion 24a which is provided with
a central aperture 34a to accommodate a screw
It will be noted that the central portion -ofthe
spring 40 is' provided with a non-circular aper
30 36a. Formed integral with and superimposing
ture 48 to accommodate a reduced section ‘5D of
the base plate 24a is a spring member 40a which
the nut 22. -The'aperture 48 is disposed in axial
functions in the same manner as the spring 40
alignment with the aperture 34 so that when the
previously described. The nut 22a has a reduced
screw 36 is passed through 'theaperture 34 it
portion 50a and a polygonal cross section
may conveniently be brought into threaded en
adapted to be received by a complementary aper
gagement with the internal' threads `of the nut
ture 48a. A flange 52a is designed toV bear
22.V 'I'he nut 22 is provided with a ilange or head
against the outer surface of the spring 40a.' The
52 which bears against the outer surface ofthe
fastening device of Figures 9 to 13, inclusive, is
spring 40. It also will be apparent from the
not equipped with extensions or tabs for ac-"
foregoing description that the Work pieces 30 and 40 commodating
rivets but ismore in the nature of
32 must be apertured similarly tothe central
a nut structure. For purposes of illustration a
portion of the base platev24 to accommodate
channel member 30a, illustrated by dot and dash
the fastening screw'36.
’
_
.
lines, constitutes the work piece forv accommo
The nut 22 and retainer 2l) when initially as
dating the retainer 20H. In Figures 9 to 11, in
sembled with each other `have a sufficiently close I elusive, the rretainer and nut are shown in the’
frictional ñt to prevent inadvertent or'unauthor
_ position loccupied before tightening. In Figure
ized separation.A InH other words, the frictional
12 the parts-are shown in their tightened posi
ñt between these parts is such thatthe 'combined
tion with the bottom surface of the nut’ñrmly‘
elements'may be handled asa unit. In Figure
clamped against the base plate 24a. The spring
3 the fastenerand screw/are shown in the posi to 40a functions similarly to the spring 49, pre
tions occupied before the sheets 30 and 32 have
viously described, in axially urging the nut 22a
been clamped together. Continued -rotation of
into ñrm frictional engagement with the con
the screw 36 in a tightening direction after the
volutions of the threads on the screw member
sheets 30 and 32' have been brought; together
36a. 'I‘he nut 22a like the nut 22 is resiliently'
causes the lateral stressing-of the spring 40 to-_
supported by a spring capable of withstanding
ward the plate 24. This ultimately results in
high Vtensile loads. The nut 22a is- adapted to
causing the advancing surface of the nut to abut
seat itself solidly against the base plate 24a,
the outer surface ofthe base plate 2»4 in the
thereby taking up the entire tightening load. It
vicinity of the aperture 34 as clearly illustrated
is preferred to preliminarilyassemble the nut 22a
inFigures 4 and 5. In this position, the `spring
with the aperture 48a while the spring 40o-is
40 has been laterally stressed suiiiciently to exert 60 in a flattened state, the subsequent bowing of'
a strong spring action-'against the nut tending
the spring serving to grip the side lSurfaces -of
to bind the thread convolutions of the nut against
the nut and thus secure the nut against sep
the complementary thread convolutions of the
aration from the spring.
'
screw. The abutment ofA the‘nut surface against 65
In Figures 14 and l5 a slightly modified ar
the base plate prevents the stressing of the spring
rangement is disclosed. A' nut 22D is'formed with
40.2beyondits elastic limitations and thus insures
an arcuate clamping surface A designed to en?l
a -very ñrm binding action between the screw
and nut.-
y
.
gage a spring member 40h with' a retainer mem
‘
ber Zilb. This spring member 40h superimposes
It will be noted that by employing the arrange
a base plate 24h and functions similarly to the
70
ment of the base plate and superimposing spring,"
spring plates 40 and 40a, previously described.
none of the stresses experienced by the spring
The spring 40e is normally flat as illustrated in
are transmitted to the rivets 28. That is to say,
Figures 14 and l5, and by having the clamping
the rivets experience no shearing stresses as av
surface of the nut 22o arcuate, said spring ,may
result of the lateral stressing yof the spring 4i).V »15 be readily deflected from its flattened state' to‘
2,405,925
5
the curved dotted line position illustrated in Fig- "
ure 14.. This differs from the previously described
springs 4U and 40a which are normally bowed
outwardly, In all other respects, however, the
device shown in Figures I4 and I5. functions sim
ilarly to the device previously described».`
,In Figures 16 and i7> a- nut 22e is shown which
is structurally similar to. the nut 22a. previously
described` This nut 22e .cooperates with and is
held within a retainerÁ member 26e, said retainer
member including Ía resilient Aplate 40e and a base
plate 24e. 'I'he plate 40e is provided with’pro
_6
tact between complementary thread convolutions.
3. A> fastening.v device. for accommodating a
screw' element. comprising a base section having
a. screwA receiving aperture, a resilient section
spaced from and bridging said base section, .spac
ing members extending transversely betweentsaid
sections to hold said sections in separated rela
tion, and a nut member supported as a unit by
said resilient section andi normally spaced from
the plane oi said base section and non-rotatable
with respect to said> resilient. section, said nut
having its internally threaded aperture inv align
tuberances B which are adapted to be engaged,
ment with the aperture of thebase fory receiving a
by'a. complementary clam-ping surface of the nut
40e. Thus, when the nut is firmly tightened
against the spring 40o, said spring assumes the
fastening screw element, whereby» the tightening
of a screw and nut will cause said resilient section
illexed dotted line position as illustrated in Figure
so as to increase frictional contact between com
locking effectiveness of the resiliently supported
screw element, whereby the tightening of a screw
and nut will cause said resilient section to be
stressed laterally toward the base section so as
to be stressed laterally toward the base section
plementary thread convolutions, the structure of
6.
said nut extending sufficiently beyond said re
From the foregoing, it will be apparent that the
present invention contemplates a fastening de 20 silient section toward the base section to provide
an abutment for limiting lthe extent to which said
vice of improved practical construction wherein
resilient section and consequently the nut may
the spring superimposing the base provides a very
be shifted toward the base section.
firm resilient support for the nut element coupled
4. A fastening device for accommodating a
therewith. The base plate rests firmly against
the work piece and no deleterious strains or 25 screw element comprising a base section having
a screw receiving aperture, a resilient section
stresses are experienced by the base plate as a
bridging said base section and having a nut re
result of the iiexing of the superimposing spring
ceiving aperture, spacing members extending be
plate. By causing the nut .to be ultimately
tween said sections to hold said sections in sep
brought into abutment with the surface of the
arated relation, and a nut member carried within
base the degree of flexing of the spring element
the aperture of and non-rotatable with respect
is limited. The base plate provides a firm abut
to said resilient section, said nut having its in
ment surface for the nut and thus enables the
ternally threaded aperture in alignment with the
complementary screw member to be firmly tight
aperture of the base for receiving a fastening
ened in place without in any way impairing the
nut.
Obviously, the invention is not limited to the
specific disclosure but is capable of other modifi
cations and changes without departing from the
spirit and scope of the appended claims.
The invention is hereby claimed as follows:
1. A fastening device for accommodating a
screw element comprising a base section having
a screw receiving aperture, a resilient section
spaced from and bridging said base section, spac 4.5
to increase frictional contact between comple
mentary thread convolutions, said nut having a
reduced section adapted to be accommodated by
the aperture in said resilient section, and an
enlarged portion providing a flange for engaging
the outer surface of said resilient section.
5. A fastening device for accommodating a
ing members extending transversely between said
screw element comprising a base section having
a screw receiving aperture, a resilient section
sections to hold said sections in separated rela
tion, and a nut member supported as a unit by
said resilient section in spaced relation to the
plane of said base section and non-rotatable with'
spaced from and bridging said base section, spac
ing members transversely extending between said
sections to hold said sections in separated rela
tion, and a resilient collet type nut member sup
respect to said resilient section, said nut having
its internally threaded aperture in alignment with
ported as a unit by said resilient section in nor
the aperture of the base for receiving a fasten
ing screw element, whereby the tightening of a
screw and nut will cause said resilient section to
mally spaced relation to the plane of said base
section and non-rotatable with respect to said
resilient section, said nut having its internally
threaded aperture in alignment with the aper
be stressed laterally toward the base section
. ture of the base for receiving a fastening screw
spaced therefrom so as to increase írictional con
tact between complementary thread convolutions.
2. A fastening device for accommodating a
screw element comprising a base section having-
element, whereby the tightening of a screw and
nut will cause said resilient section to be stressed
laterally toward the base section spaced there
from so as to urge the screw and nut axially and
to collapse the nut into frictional contact with
complementary thread convolutions of the screw.
6. A fastening device for accommodating a
having a nut receiving aperture, spacing mem
screw element comprising a base section having
bers extending transversely between said sections
to hold said sections in separated relation, and a 65 a screw receiving aperture, a resilient section
ridging said base section, spacing members eX
nut member supported as a unit within the ap
tending between said sections to hold said sec
erture of said resilient section and normally
tions in separated relation, and a resilient collet
spaced from the plane of said base section and
type nut member carried by and non-rotatable
non-rotatable with respect to said resilient sec
with respect to said resilient section, said nut
tion, said nut having its internally threaded ap
having its internally threaded aperture in align
erture in alignment with the aperture of the base
ment with the aperture of the base for receiving
for receiving a fastening screw element, whereby
a fastening screw element, whereby the tighten
the tightening of a screw and nut will cause said
ing of a screw and nut will cause said resilient
resilient section to be stressed laterally toward
section to be stressed laterally toward the base
the base section so as to increase frictional con
a screw receiving aperture, a resilient section
spaced from and bridging said base section and
2,405,925
v7
section `so as to axially urge >the nut and screw
member to collapse the nut into frictional con
.tact with complementary thread convolutions of
the screw element, the structure of said >nut ex
tending suf?ciently beyond said, resilient section
Vtoward the base section to provide an abutment
for. limiting` the extent to which said resilien
Vsection may be deiiected.
»
\
7. A fastening device for accommodating
' 8
»member having a, reduced portion extending into
andV non-rotatable with respect to said resilient
section, the inner extremity of said reduced por
tion being normally spaced from the plane of said
base section, said nut having its internally thread
edaperture in alignment with the aperture of the
base for receiving a fastening screw element,
Wherebythe tightening of a screw and nut will
cause said resilient section to be stressed laterally
screw element comprising a base section having 10 toward the base section so as to increase frictional
a screw receiving laperture, a resilient section
resistance to turning between complementary
Vbridging said base section, spacing members ex
tending transversely between said sections to hold
said sections in separated relation, and a nut
thread convolutions.
OUGLJESA JULES POUPITCH. 4
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