US3817522A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Force focusing golf club
Assignee: Individual
•
Filing: 1973-02-20
•
Granted: 1974-06-18
•
Expires: 1993-02-20
Abstract
Abstract This is a golf club comprising a head and attached shaft wherein a pressure focusing means, such as a metal paraboloid reflector, is disposed in a filled recess to reflect shock waves caused by a golf ball impacting on the impact face of the head. The head may also include a gas-filled chamber adjacent to the side of the reflector opposite the impact face.
Inventors
- 👤 S Simmons
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 15:12
CPC Classifications
A; A63; A63B; A63B53/00; A63B53/04; A63B53/0458; A63B53/0462; A63B53/0466; A63B60/00; A63B2209/00; A63B53/0416; A63B53/042; Y; Y10; Y10S; Y10S273/00; Y10S273/03
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
152 words
A golf club having a head, an impact face thereon, and an attached shaft, the combination comprising: a pressure focusing metallic element disposed in said head, said focusing element having a concave inner surface defining a force focusing structure with an open end facing said impact face; synthetic material in uniform contact with said inner surface and entirely and uniformly filling said inner surface forming and said impact face; and a relatively thin-walled hollow ball disposed in said head adjacent to and on the side of said pressure focusing element opposite said impact face whereby pressure forces caused to propagate in said synthetic material inwardly from said impact face toward said inner surface and said hollow ball when a golf ball strikes said impact face are uniformly reflected by the action of said inner surface and said hollow ball and caused to propagete back through said synthetic material toward said impact face.
Claim 2
Dependent Claim
152 words
A golf club having a head, an impact face thereon, and an attached shaft, the combination comprising: a pressure focusing metallic element disposed in said head, said focusing element having a concave inner surface defining a force focusing structure with an open end facing said impact face; synthetic material in uniform contact with said inner surface and entirely and uniformly filling said inner surface forming and said impact face; and a relatively thin-walled hollow ball disposed in said head adjacent to and on the side of said pressure focusing element opposite said impact face whereby pressure forces caused to propagate in said synthetic material inwardly from said impact face toward said inner surface and said hollow ball when a golf ball strikes said impact face are uniformly reflected by the action of said inner surface and said hollow ball and caused to propagete back through said synthetic material toward said impact face.
Claim 3
Dependent Claim
21 words
The golf club according to claim 1, wherein synthetic material is disposed between said hollow ball and said pressure focusing element.
Claim 4
Dependent Claim
32 words
The golf club according to claim 2, wherein a closable passageway is disposed in said head between said head between said hollow ball''s inner chamber and an outer surface of said head.
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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) | 1977-06-17 | 1977-12-17 | 1978-06-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-06-17 | 1981-12-17 | 1982-06-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-06-17 | 1985-12-17 | 1986-06-18 | $7700.00 | Window Closed / Lapsed |