US4292876A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Washer
Assignee: Individual
•
Filing: 1979-07-05
•
Granted: 1981-10-06
•
Expires: 1999-07-05
Abstract
Abstract An improved steel and neoprene bonded washer having a crowned steel washer with an inner elastomeric washer. The elastomeric washer is adjacent to the concave surface of the crowned washer. The steel washer has a generally flat outer ring and a conical portion extending from the outer ring toward the central opening. The angle of the sides of the conical portion is between 30° and 50° with respect to the flat portion.
Inventors
- 👤 Henry R. De Graan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 16:11
CPC Classifications
F; F16; F16B; F16B43/00; F16B43/001; F16B11/00; F16B11/006; Y; Y10; Y10S; Y10S411/00; Y10S411/90; Y10S411/901
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
143 words
An improved steel and neoprene bonded washer of the type having a crowned steel washer having an elastomeric washer adjacent the concave surface of the crowned washer, wherein the improvement comprises: a steel washer having a generally flat outer ring and a conical portion extending from the flat outer ring to an opening at the center thereof, the angle of the sides of said conical portion being between 30° and 50°, said conical portion meeting the undersurface of the head of the screw with which it is used at an angle of between 30° and 50°, and wherein the flat portion is between 15% and 33% of the outside diameter of the washer; and an elastomeric washer bonded to the concave surface of the steel washer, said elastomeric washer having an outside diameter which extends under a portion of said flat outer ring.
Claim 2
Dependent Claim
143 words
An improved steel and neoprene bonded washer of the type having a crowned steel washer having an elastomeric washer adjacent the concave surface of the crowned washer, wherein the improvement comprises: a steel washer having a generally flat outer ring and a conical portion extending from the flat outer ring to an opening at the center thereof, the angle of the sides of said conical portion being between 30° and 50°, said conical portion meeting the undersurface of the head of the screw with which it is used at an angle of between 30° and 50°, and wherein the flat portion is between 15% and 33% of the outside diameter of the washer; and an elastomeric washer bonded to the concave surface of the steel washer, said elastomeric washer having an outside diameter which extends under a portion of said flat outer ring.
Claim 3
Dependent Claim
16 words
The improved washer of claim 1 wherein the angle of said conical portion is about 45°.
Claim 4
Dependent Claim
20 words
The improved washer of claim 1 wherein said flat portion is about 25% of the outside diameter of the washer.
Claim 5
Dependent Claim
23 words
The improved washer of claim 1 wherein the inside opening in the elastomeric washer is smaller than the opening in the steel washer.
Claim 6
Dependent Claim
43 words
The improved washer of claim 4 further including a screw passing through the opening in the steel washer and passing through the opening in the elastomeric washer, the outside diameter of the screw being larger than the inside diameter of the elastomeric washer.
Claim 7
Dependent Claim
14 words
The improved washer of claim 1 wherein said elastomeric washer is a neoprene washer.
References Cited (Backward Citations)
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Cited
US3153971A
Cited
US3160054A
Cited
US3452636A
Cited
US3670618A
Cited
US3882752A
Cited
US4102239A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1984-10-05 | 1985-04-06 | 1985-10-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-10-05 | 1989-04-06 | 1989-10-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-10-05 | 1993-04-06 | 1993-10-06 | $7700.00 | Window Closed / Lapsed |