US4872676A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Energy absorbing ball
Assignee: Individual
•
Filing: 1988-03-22
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Granted: 1989-10-10
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Expires: 2008-03-22
Abstract
Abstract An energy absorbing ball comprising a resilient structural outer casing and an energy absorbent core, characterized in that the core is formed of a non-resilient deformable material adapted on rolling to move relative to the casing. The core may comprise, in part, a low viscosity liquid and a surface active agent. The inner surface of the casing is smooth and the deformable material consists by volume of from 40-70% of the core volume, thereby to provide an average deviation on striking of less than 0.21 meters per meter run.
Inventors
- 👤 Charles P. Townsend
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 00:42
CPC Classifications
A; A63; A63B; A63B37/00; A63B37/02; A63B37/08
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
93 words
A low-deviation croquet ball comprising a resilient structural outer casing and an energy absorbent core, said core being formed of a non-resilient deformable material adapted on rolling to move relative to the casing, said deformable material consisting by volume of from 40-70% of the core volume, characterized in that the inner face of the outer casing is smooth and in that the deformable material includes a low viscosity liquid and a small amount of surface active agent, thereby to provide an average deviation on striking of less than 0.21 meters per meter run.
Claim 2
Dependent Claim
93 words
A low-deviation croquet ball comprising a resilient structural outer casing and an energy absorbent core, said core being formed of a non-resilient deformable material adapted on rolling to move relative to the casing, said deformable material consisting by volume of from 40-70% of the core volume, characterized in that the inner face of the outer casing is smooth and in that the deformable material includes a low viscosity liquid and a small amount of surface active agent, thereby to provide an average deviation on striking of less than 0.21 meters per meter run.
Claim 3
Dependent Claim
14 words
A ball according to claim 1 having a total weight of approximately 453 gms.
Claim 4
Dependent Claim
24 words
A ball according to claim 2 wherein the material comprises 155 gms glass beads, 100 gms water, and 1 drop of surface active agent.
Claim 5
Dependent Claim
31 words
A ball according to claim 1 characterized in that the low viscosity liquid is water and includes no more than two drops of surface active agent per 100 grams of water.
References Cited (Backward Citations)
US3734498A
Cited
US4448418A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1992-10-09 | 1993-04-10 | 1993-10-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-10-09 | 1997-04-10 | 1997-10-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-10-09 | 2001-04-10 | 2001-10-10 | $7700.00 | Window Closed / Lapsed |