Patent US4541631A successfully refreshed from Google Patents.
US4541631A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Golf club
Assignee: Individual
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Filing: 1983-10-03
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Granted: 1985-09-17
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Expires: 2003-10-03
Abstract
Abstract The present application relates to a golf club having a hollowed head portion connected to a hollow shaft portion forming a sealed, internal chamber within the club. A flowable weight is positioned within the chamber. A two way valve allows the flowable weight to pass therethrough and into the hollowed head portion by centrifugal force as the club is swung, and allows the flowable weight to return from the hollowed head portion by passing through the valve by gravity as the club is inverted.
Inventors
- 👤 Howard A. Sasse
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 13:23
CPC Classifications
A; A63; A63B; A63B21/00; A63B21/06; A63B21/0601; A63B21/0602; A63B53/00; A63B53/08; A63B60/00; A63B60/02; A63B60/04; A63B60/06; A63B60/08; A63B60/10; A63B60/22; A63B60/24
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
86 words
A golf club having a hollow head portion connected to a hollow shaft portion, forming an enclosed internal chamber within the club, a flowable weight moveable within said chamber, a valve for preventing said flowable weight from passing from said shaft portion into said hollow head portion, said valve including means for allowing said flowable weight to flow from said hollow shaft portion into said hollow head portion, said last named means being actuable by centrigual force acting thereon during the downswing of a golf club.
Claim 2
Dependent Claim
86 words
A golf club having a hollow head portion connected to a hollow shaft portion, forming an enclosed internal chamber within the club, a flowable weight moveable within said chamber, a valve for preventing said flowable weight from passing from said shaft portion into said hollow head portion, said valve including means for allowing said flowable weight to flow from said hollow shaft portion into said hollow head portion, said last named means being actuable by centrigual force acting thereon during the downswing of a golf club.
Claim 3
Dependent Claim
13 words
The golf club of claim 1 wherein said flowable weight is a liquid.
Claim 4
Dependent Claim
16 words
The golf club of claim 1 wherein said flowable weight ranges from 0.75 to 2.00 ounces.
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) | 1988-09-16 | 1989-03-18 | 1989-09-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-09-16 | 1993-03-18 | 1993-09-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-09-16 | 1997-03-18 | 1997-09-17 | $7700.00 | Window Closed / Lapsed |