US3821919A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Staple
Assignee: Illinois Tool Works Inc
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Filing: 1972-11-10
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Granted: 1974-07-02
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Expires: 1992-11-10
Abstract
Abstract A staple device which is particularly adapted to be used with gypsum board workpieces or the like and which includes a head portion having a cross-sectional configuration defined by an advancing and trailing portion which is particularly adapted to distribute the load on the workpiece to preclude damaging the workpiece when the head is driven flush with the surface of the workpiece.
Inventors
- 👤 F Knohl
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 02:18
CPC Classifications
F; F16; F16B; F16B15/00; F16B15/0015; Y; Y10; Y10S; Y10S411/00; Y10S411/92
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
287 words
A fasteNer device for use in wallboard or the like including a head integrally connecting and extending between a pair of legs, the fastener being formed from round wire with the crosssectional area of the head portion being substantially identical to the cross-sectional area of the circular wire stock, the head having a cross-sectional configuration defined by a flat uppermost surface and an under surface with an advancing and trailing portion, the advancing portion being defined by a generally blunt curvilinear surface, the trailing portion forming wing-like lateral extensions of the advancing portion with the juncture of the advancing portion and the trailing portion being spaced upwardly from the lowermost extremity of the advancing portion, the trailing portion flaring outwardly and upwardly from the juncture point with the advancing portion to a maximum width and including short side surfaces extending generally perpendicularly to the flat uppermost surface and defining the maximum width of the head, the blunt advancing portion, in crosssectional configuration, being of a depth not greater than onehalf the total depth of the head and of a width not greater than one-half the maximum width of the head, the side surface extending to a depth not greater than one-quarter the total depth of the head and extending from the juncture point at an angle of generally 10* to the plane including the flat uppermost surface, the juncture point of the advancing and trailing sections being a smooth connecting curvilinear surface wherein the staple may be driven at least flush with the surface of the wallboard without tearing or otherwise damaging the surface and providing a dimplelike cavity surrounding the head capable of receiving and retaining cementitious material to provide a smooth appearing panel exposed surface.
Claim 2
Dependent Claim
287 words
A fasteNer device for use in wallboard or the like including a head integrally connecting and extending between a pair of legs, the fastener being formed from round wire with the crosssectional area of the head portion being substantially identical to the cross-sectional area of the circular wire stock, the head having a cross-sectional configuration defined by a flat uppermost surface and an under surface with an advancing and trailing portion, the advancing portion being defined by a generally blunt curvilinear surface, the trailing portion forming wing-like lateral extensions of the advancing portion with the juncture of the advancing portion and the trailing portion being spaced upwardly from the lowermost extremity of the advancing portion, the trailing portion flaring outwardly and upwardly from the juncture point with the advancing portion to a maximum width and including short side surfaces extending generally perpendicularly to the flat uppermost surface and defining the maximum width of the head, the blunt advancing portion, in crosssectional configuration, being of a depth not greater than onehalf the total depth of the head and of a width not greater than one-half the maximum width of the head, the side surface extending to a depth not greater than one-quarter the total depth of the head and extending from the juncture point at an angle of generally 10* to the plane including the flat uppermost surface, the juncture point of the advancing and trailing sections being a smooth connecting curvilinear surface wherein the staple may be driven at least flush with the surface of the wallboard without tearing or otherwise damaging the surface and providing a dimplelike cavity surrounding the head capable of receiving and retaining cementitious material to provide a smooth appearing panel exposed surface.
Claim 3
Dependent Claim
25 words
A fastener device in accordance with claim 1, wherein the cross-sectional configuration of the head extends at least partially down the length of each leg.
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) | 1977-07-01 | 1977-12-31 | 1978-07-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-07-01 | 1981-12-31 | 1982-07-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-07-01 | 1985-12-31 | 1986-07-02 | $7700.00 | Window Closed / Lapsed |