Patent JPS5927247A successfully refreshed from Google Patents.
US3826458A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Plastic fastener
Assignee: Illinois Tool Works Inc
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Filing: 1973-02-20
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Granted: 1974-07-30
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Expires: 1993-02-20
Abstract
Abstract A one piece plastic fastener for application to one side of a panel having a generally square aperture and adapted to cooperate with secondary means located on the opposite side of the panel. The fastener has a tapered thin-wall cup-shaped head for engaging said opposite side of the panel adjacent the edges of the aperture when the fastener is telescoped and then rotated in the aperture with angularly offset rigid means adjacent said head traversing the aperture after rotation of the fastener and cooperating with said aperture to prevent unintentional retrograde rotation.
Inventors
- 👤 J Fisher
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 14:29
CPC Classifications
F; F16; F16B; F16B13/00; F16B13/04; F25; F25D; F25D23/00; F25D23/06; F25D23/065; F25D23/067; Y; Y10; Y10S; Y10S411/00; Y10S411/904; Y10S411/907; Y10S411/913
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
262 words
A one piece plastic anchor fastener for application to a generally square aperture and located on one side of a workpiece and secondary fastening means adapted to be associated with said fastener from the opposite side of said workpiece, said anchor including a head of square cross-section complimentary to said aperture, said head having a substantially square resilient relatively thin-wall cuplike configuration that tapers outwardly towards its free end to provide a cam-like outer clamping surface at each corner thereof, a relatively rigid element having at least portions thereof corresponding to and adapted to cooperate with said aperture in said panel, said element being positioned adjacent to and extending axially from the clamping surface of said head for receipt in said square aperture upon the passage of said head through said panel, thereby to traverse said panel and prevent further rotation of said fastener in said aperture, at least one of the portions of said rigid element being in a plane disposed at approximately 45* to a plane passing through one side of said head, a second head adjacent said rigid element and having a substantial work clamping surface axially spaced from the clamping surface of said first mentioned head sufficiently to resiliently grip said work panel therebetween, means projecting outwardly from said second head opposite to said work clamping surface including a bore closed at one end with the open end communicating with the interior of said cup-like configuration of said first mentIoned head, and guide means surrounding the open end of said bore adapted to accept said secondary fastening means.
Claim 2
Dependent Claim
262 words
A one piece plastic anchor fastener for application to a generally square aperture and located on one side of a workpiece and secondary fastening means adapted to be associated with said fastener from the opposite side of said workpiece, said anchor including a head of square cross-section complimentary to said aperture, said head having a substantially square resilient relatively thin-wall cuplike configuration that tapers outwardly towards its free end to provide a cam-like outer clamping surface at each corner thereof, a relatively rigid element having at least portions thereof corresponding to and adapted to cooperate with said aperture in said panel, said element being positioned adjacent to and extending axially from the clamping surface of said head for receipt in said square aperture upon the passage of said head through said panel, thereby to traverse said panel and prevent further rotation of said fastener in said aperture, at least one of the portions of said rigid element being in a plane disposed at approximately 45* to a plane passing through one side of said head, a second head adjacent said rigid element and having a substantial work clamping surface axially spaced from the clamping surface of said first mentioned head sufficiently to resiliently grip said work panel therebetween, means projecting outwardly from said second head opposite to said work clamping surface including a bore closed at one end with the open end communicating with the interior of said cup-like configuration of said first mentIoned head, and guide means surrounding the open end of said bore adapted to accept said secondary fastening means.
Claim 3
Dependent Claim
17 words
A fastener of the type claimed in claim 1 wherein said secondary fastening means is a screw.
Claim 4
Dependent Claim
36 words
A fastener of the type claimed in claim 1 wherein said secondary fastening means includes support means overlying said aperture on said opposite side of said panel and including means for supportive cooperation with said fastener.
Claim 5
Dependent Claim
28 words
A fastener of the type claimed in claim 1 wherein said rigid element includes at least two flat sides falling in planes which join at a sharp angle.
Claim 6
Dependent Claim
84 words
A fastener of the type claimed in claim 1 wherein said rigid element has four substantially flat sides, the walls of said first mentioned head being of substantially uniform thickness with the corners of said first mentioned head being truncated by surfaces which each fall in an angled plane that substantially includes the adjacent flat side of said rigid element and a point adjacent to the outer extremity of said corner to form a tapered cam surface for clamping cooperation with the apertured panel.
Claim 7
Dependent Claim
45 words
A fastener of the type claimed in claim 1 wherein said first mentioned head is relieved at its corners whereby axial pressure against the free extremity of said head causes said corners to separate to form petals which overlie said opposite side of said panel.
Claim 8
Dependent Claim
70 words
A fastener of the type claimed in claim 5 wherein said first mentioned head is further provided with a tapered groove at each truncated corner thereby thinning the corner wall thickness so that the application of an axial pressure on the free end of said head causes the corners of said cup-like configuration to split and further pressure causes the sides to petal into overlying relation to said opposite side.
Claim 9
Dependent Claim
97 words
A fastener of the type claimed in claim 1 wherein said secondary fastening means includes support means and a screw adapted to threadedly engage said bore, said support means having a base with an outer peripheral margin means adapted to engage said opposite side of said workpiece and an open ended central cavity defined by a wall facing said open end and said outer peripheral margin means defining the side wall of said cavity, said cavity adapted to accept said first mentioned head within its confines and a bore communicating with said cavity to accept said screw.
Claim 10
Dependent Claim
40 words
A fastener of the type claimed in claim 8 wherein said guide means includes an extension defining a continuation of said bore and projecting into said first mentioned head, means on said support means for cooperative engagement with said extension.
Claim 11
Dependent Claim
32 words
A fastener of the type claimed in claim 9 wherein said extension is a tubular-like member adapted to cooperate with a similar second member located within the cavity of said support member.
Claim 12
Dependent Claim
110 words
A fastener of the type claimed in claim 8 wherein said wall is spaced from a plane perpendicular to the axis of said secondary fastening means which passes through the outer extremity of said margin means a predetermined distance less than the distance that said first mentioned head projects through and beyond the opposite side of said panel whereby introduction of force by rotation of said screw causes said wall to forceably bear against the free end of said first mentioned head to thereby split the corners of said head and cause the sides to petal outwardly against the opposite side of said panel within the confines of said cavity.
Claim 13
Dependent Claim
40 words
A fastener of the type claimed in claim 1 wherein said means projecting outwardly from said second head includes a body portion for said bore and a non-circular means for gripping during rotatable insertion of said fastener in said panel.
Claim 14
Dependent Claim
68 words
A fastener of the type claimed in claim 12 wherein said body portion is a closed end tubular member and said gripping means is a wing element which extends substantially radially outwardly from said tubular member towards the margin of said second head and adapted to engage poured material located adjacent said panel and assist in preventing rotation of said fastener during driving of said secondary fastening means.
Claim 15
Dependent Claim
26 words
A fastener of the type claimed in claim 12 wherein said clamping surface of said second head is dished to provide sealing engagement with said panel.
Claim 16
Dependent Claim
36 words
A fastener of the type claimed in claim 14, wherein said second head is at least twice as great in diametral measurement as said first mentioned head to distribute the load factor against a fragile panel.
Claim 17
Dependent Claim
43 words
A fastener of the type claimed in claim 7 wherein the walls of said first-mentioned head are radially relieved along a substantial portion of a circumferential line disposed intermediate the axial extremities of said walls to thereby assist in petaling of said walls.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-07-29 | 1978-01-28 | 1978-07-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-07-29 | 1982-01-28 | 1982-07-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-07-29 | 1986-01-28 | 1986-07-30 | $7700.00 | Window Closed / Lapsed |