US4173343A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Mallet putter
Assignee: Zephyr Industries Inc
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Filing: 1976-06-07
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Granted: 1979-11-06
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Expires: 1996-06-07
Abstract
Abstract The present disclosure relates to an aluminum mallet type putter for golf characterized by having a stainless steel "sweet spot" which is mounted in the face of the mallet so that the sweet spot is of greater length than its diameter and the concentration of weight is increased at the sweet spot to improve directionality of putt and give improved feel for the subsequent correction of one's putting stroke. This disclosure of a mallet type putter for golf has inset within its striking face at the sweet spot a plug of stainless steel which is 5/8" in diameter by 15/8" in depth and provides greater directionality to a golf ball as well as improved flight characteristics.
Inventors
- 👤 Vincent J. Richilano
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 16:11
CPC Classifications
A; A63; A63B; A63B53/00; A63B53/007; A63B53/04; A63B53/0433; A63B53/0487; A63B53/0416
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
196 words
A mallet type putter comprising: a shaft having a center line extending between opposite ends; a head secured to one end of said shaft, having a striking face, and being constructed of a metal with a specific gravity less than 3 and a single heavy core with a specific gravity of at least 7 to provide a sweet spot for the head; said heavy core being at the sweet spot, extending rearwardly from the striking face and having a front and a rear end; said center line of said shaft passing through the sweet spot for the head and through said core thereby reducing chances of twisting the putter while in the hands of a golfer; said core having a substantially greater axial length perpendicular to the striking face than width parallel to the striking face; the center of gravity of the putter head being rearwardly displaced from the striking face; the front end of said core being on and constituting a part of the striking face of the putter, and said core being rigidly secured within the head, whereby the sectional density of the core provides improved trajectory for a golf ball with reduced wobble.
Claim 2
Dependent Claim
196 words
A mallet type putter comprising: a shaft having a center line extending between opposite ends; a head secured to one end of said shaft, having a striking face, and being constructed of a metal with a specific gravity less than 3 and a single heavy core with a specific gravity of at least 7 to provide a sweet spot for the head; said heavy core being at the sweet spot, extending rearwardly from the striking face and having a front and a rear end; said center line of said shaft passing through the sweet spot for the head and through said core thereby reducing chances of twisting the putter while in the hands of a golfer; said core having a substantially greater axial length perpendicular to the striking face than width parallel to the striking face; the center of gravity of the putter head being rearwardly displaced from the striking face; the front end of said core being on and constituting a part of the striking face of the putter, and said core being rigidly secured within the head, whereby the sectional density of the core provides improved trajectory for a golf ball with reduced wobble.
Claim 3
Dependent Claim
23 words
The putter of claim 1 in which the core has a diameter of about 5/8 inches and a length of about 15/8 inches.
Claim 4
Dependent Claim
32 words
The putter of claim 1 in which a position gauge is mounted on the mallet the exact length of a golf ball and positioned evenly on either side of the sweet spot.
Claim 5
Dependent Claim
24 words
The putter of claim 1, wherein the ratio of axial length of said core to the width of said core is greater than 2.
Claim 6
Dependent Claim
26 words
The putter of claim 1, wherein the metal of said head is aluminum and the rear end of said core is shouldered within the aluminum head.
Claim 7
Dependent Claim
25 words
The putter of claim 5, wherein said heavy core is constructed of a material selected from the group consisting of stainless steel and titanium carbide.
Claim 8
Dependent Claim
24 words
The putter of claim 5, wherein the ratio of axial length of said core to the width of said core is greater than 2.
Claim 9
Dependent Claim
74 words
The putter of claim 1, wherein said head has a diamond shaped sole with apexes respectively at the toe and heel of the head, and flared portions extending from the toe and heel apexes to the striking face and flared portions extending from the apexes at the toe and heel to the trailing edge of the head for reducing the resistance of and increasing the stability of the head moving through grass during putting.
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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) | 1982-11-05 | 1983-05-07 | 1983-11-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-11-05 | 1987-05-07 | 1987-11-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-11-05 | 1991-05-07 | 1991-11-06 | $7700.00 | Window Closed / Lapsed |