Patent US4798761A successfully refreshed from Google Patents.
US4772020A
Expired / Lapsed
US
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Helically grooved foamed football
Assignee: YKK Corp
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Filing: 1987-11-16
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Granted: 1988-09-20
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Expires: 2007-11-16
Abstract
Abstract An elastic foam football 10 with lengthwise spiral grooves 20 increasing in width and depth towards the middle of the ball for improved handling.
Inventors
- 👤 Rod G. Martin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 14:04
CPC Classifications
A; A63; A63B; A63B43/00; A63B43/002; A63B37/00; A63B37/14; A63B2208/00; A63B2208/12; Y; Y10; Y10S; Y10S273/00; Y10S273/20
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
111 words
A solid foam football having a major axis and an outer surface, wherein helical grooves are disposed in said outer surface in the direction of said major axis for the placement of fingertips thereinto to improve gripping and passing of said football, said helical grooves having a maximum depth in the range of 0.2 to 0.3 inches and a maximum width in the range of 0.4 to 0.6 inches, said helical grooves becoming shallower and narrower towards its ends, and wherein the angles of any of said helical grooves with respect to said major axis correspond generally to the placement of fingertips on said football when gripping said football for passing.
Claim 2
Dependent Claim
111 words
A solid foam football having a major axis and an outer surface, wherein helical grooves are disposed in said outer surface in the direction of said major axis for the placement of fingertips thereinto to improve gripping and passing of said football, said helical grooves having a maximum depth in the range of 0.2 to 0.3 inches and a maximum width in the range of 0.4 to 0.6 inches, said helical grooves becoming shallower and narrower towards its ends, and wherein the angles of any of said helical grooves with respect to said major axis correspond generally to the placement of fingertips on said football when gripping said football for passing.
Claim 3
Dependent Claim
18 words
The football of claim 1 wherein said grooves end at a margin from the ends of the football.
Claim 4
Dependent Claim
24 words
The football of claim 1 wherein each of said helical grooves comprise two essentially flat walls forming a V shape with a concave bottom.
Claim 5
Dependent Claim
27 words
The football of claim 3 wherein the angle of said grooves with respect to said major axis at the maximum diameter of said football is approximately 30°.
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) | 1991-09-20 | 1992-03-21 | 1992-09-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-09-20 | 1996-03-21 | 1996-09-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-09-20 | 2000-03-21 | 2000-09-20 | $7700.00 | Window Closed / Lapsed |