US3771199A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Shaft-locking-cover-clamp button assembly
Assignee: Individual
•
Filing: 1972-05-24
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Granted: 1973-11-13
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Expires: 1992-05-24
Abstract
Abstract A button assembly having an outer shell fixed on the end of a shaft by a plastic head integral with the shaft and protrusive through the outer shell, and an inner shell having a flange adapted to clamp the edges of sheet material covering the outer shell against the interior face of the outer shell under clamping pressure maintained by force fit of a flanged perforation in the inner shell on a uniform-section portion of the plastic head; special shapes of the parts and a double-locking provision are also disclosed.
Inventors
- 👤 C Eldringhoff
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 14:53
CPC Classifications
A; A47; A47C; A47C31/00; A47C31/02; A47C31/026; Y; Y10; Y10T; Y10T24/00; Y10T24/36; Y10T24/3606; Y10T24/367; Y10T24/3685
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
150 words
A fastener comprising a head having differing axially adjacent portions, a shaft rigidly encapsulated within the head at one end of the shaft and having first fastening means at the other end of the shaft; first and second shells having central perforations and peripheral flanges, the peripheral flange of the second shell adapted to fit within the peripheral flange of the first shell; a first portion of the head having an out-ward slope toward one end of the shaft for engaging the first shell at the perforation in the first shell; a second portion of the head comprising a uniform-section midbody, the second shell having an aligning flange around the perforation therein, proportioned for sliding force-fit on the midbody for thereby adjustably fixing the second shell in position for exerting axial pressure on the first shell; and a third portion of the head sloping from the midbody to the shaft.
Claim 2
Dependent Claim
150 words
A fastener comprising a head having differing axially adjacent portions, a shaft rigidly encapsulated within the head at one end of the shaft and having first fastening means at the other end of the shaft; first and second shells having central perforations and peripheral flanges, the peripheral flange of the second shell adapted to fit within the peripheral flange of the first shell; a first portion of the head having an out-ward slope toward one end of the shaft for engaging the first shell at the perforation in the first shell; a second portion of the head comprising a uniform-section midbody, the second shell having an aligning flange around the perforation therein, proportioned for sliding force-fit on the midbody for thereby adjustably fixing the second shell in position for exerting axial pressure on the first shell; and a third portion of the head sloping from the midbody to the shaft.
Claim 3
Dependent Claim
30 words
A fastener assembly as recited in claim 1, wherein the head has a crowned end proportioned for protrusion beyond the first shell for thereby protecting the first shell from impact.
Claim 4
Dependent Claim
36 words
A fastener assembly as recited in claim 2, wherein the head is of plastic, thereby protecting the cover material on impact and wherein the shaft has an enlarged portion engaging the interior of the plastic head.
Claim 5
Dependent Claim
38 words
A fastener assembly as recited in claim 3, wherein the enlarged portion is a disk shaped end on the shaft, and wherein a second disk shaped member is fixedly spaced therefrom on the shaft within the plastic head.
Claim 6
Dependent Claim
45 words
A fastener assembly as recited in claim 4, and a cover, the cover arranged over the exterior of the first shell with the cover edges clamped against the inner face of the end of the first shell by said axial pressure of the second shell.
Claim 7
Dependent Claim
29 words
A fastener assembly as recited in claim 5, wherein the axial pressure is applied by the second shell through the edge of the peripheral flange thereof to the cover.
Claim 8
Dependent Claim
22 words
A fastener assembly as recited in claim 6, wherein the first shell peripheral flange has an inward crimp over the second shell.
Claim 9
Dependent Claim
36 words
A fastener assembly as recited in claim 7, wherein the first portion of the head has a surface with a toroidal shape and wherein the first shell has a correspondingly shaped axial flange at the perforation.
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) | 1976-11-12 | 1977-05-14 | 1977-11-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-11-12 | 1981-05-14 | 1981-11-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-11-12 | 1985-05-14 | 1985-11-13 | $7700.00 | Window Closed / Lapsed |