US4092896A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sealing washer
Assignee: Individual
•
Filing: 1977-04-08
•
Granted: 1978-06-06
•
Expires: 1997-04-08
Abstract
Abstract The invention provides a washer having a deformable annular skirt extending from the underside of the washer. The skirt deforms to the shape of the surface to which the washer is secured by means of a fastening device having a shank passing through the washer. The resiliency of the skirt seals the cavity between the underside of the washer and the surface from moisture. The washer is particularly suitable for use with corrugated surfaces and for retaining the swarf produced by self drilling fastening devices. A snap-on cap for the washer is also provided to seal the head of the fastening device.
Inventors
- 👤 David Peter William Puchy
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 09:25
CPC Classifications
F; F16; F16B; F16B37/00; F16B37/14; F16B43/00; F16B43/001; Y; Y10; Y10S; Y10S411/00; Y10S411/915
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
87 words
An annular washer to provide a seal between the upper surface of an object into which a fastening device, having a shank passing through said washer, is inserted; said annular washer having a substantially flat region on the underside of an annular boss surrounding the center aperture through said washer, and having a peripheral downwardly, outwardly extending resiliently deformable tapered annular skirt, said tapered skirt having its rim located below said flat region and being joined to the periphery of said boss by a deformable annular diaphram.
Claim 2
Dependent Claim
87 words
An annular washer to provide a seal between the upper surface of an object into which a fastening device, having a shank passing through said washer, is inserted; said annular washer having a substantially flat region on the underside of an annular boss surrounding the center aperture through said washer, and having a peripheral downwardly, outwardly extending resiliently deformable tapered annular skirt, said tapered skirt having its rim located below said flat region and being joined to the periphery of said boss by a deformable annular diaphram.
Claim 3
Dependent Claim
45 words
The washer as claimed in claim 1 wherein said boss has a substantially flat annular area on the upper surface thereof surrounding said central aperture, and the diameter of said boss at said area is less than the diameter of said boss adjacent said diaphragm.
Claim 4
Dependent Claim
69 words
The washer as claimed in claim 1 wherein the cross-sectional area of said skirt is bounded by two curves, the first of said curves merging with the periphery of said diaphragm and being outwardly convex, the second of said curves being substantially tangential to the periphery of said washer and outwardly convex, and the radius of curvature of said first curve being larger than that of said second curve.
Claim 5
Dependent Claim
40 words
The washer as claimed in claim 1 wherein the diameter of said central aperture is larger than the diameter of the shank of the fastening device intended for use therein and said central aperture includes an inwardly protruding circular rim.
Claim 6
Dependent Claim
35 words
The washer as claimed in claim 4 wherein the periphery of said washer comprises a cylindrical wall having an exterior annular lip thereon and defining a head receiving recess in the upperside of said washer.
Claim 7
Dependent Claim
50 words
A washer and cap assembly comprising the washer as claimed in claim 5 and a cap having a flattened quasi-hemispherical dome and a substantially cylindrical side wall having an interior annular lip protruding therefrom, said exterior and interior lips being co-operable to form a seal between said washer and cap.
Claim 8
Dependent Claim
22 words
The washer and cap assembly as claimed in claim 6 wherein the lower edge of said cylindrical side wall is sinusoidally shaped.
References Cited (Backward Citations)
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US1711415A
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GB866922A
Cited
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1981-06-05 | 1981-12-05 | 1982-06-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-06-05 | 1985-12-05 | 1986-06-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-06-05 | 1989-12-05 | 1990-06-06 | $7700.00 | Window Closed / Lapsed |