US4732389A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Golf club head
Assignee: Maruman Golf Co Ltd
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Filing: 1986-11-25
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Granted: 1988-03-22
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Expires: 2006-11-25
Abstract
Abstract A golf club head for a wood type club comprises a head body (11) having a face for hitting a golf ball, the face being inclined upward and backward. A face plate (12) is provided in the face of the head body (11), and a sole plate (13) is provided in the backside of the head body (11). A bar-shaped weight (18) is provided in the head body (11) and extends substantially perpendicular to the face from the backside of the face plate toward the backside of the head body (11) so that the longitudinal axis of the bar-shaped weight (18) passes through the central portion of the face of the head body (11). A back weight (19) is provided in the backside of the head body (11) so that the line connecting the center of gravity of the golf club head (11) and the sweet spot thereof coincides with the longitudinal axis of the bar-shaped weight (18).
Inventors
- 👤 Masashi Kobayashi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 19:04
CPC Classifications
A; A63; A63B; A63B53/00; A63B53/04; A63B53/0466; A63B60/00; A63B2209/00; A63B53/0416; A63B53/045; A63B53/0454
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
159 words
A golf club head for a wood type club, comprising: a head body having a front surface inclined upward and backward; a face plate having a face for hitting a golf ball provided in said front surface of said head body; a sole plate provided at the bottom of said head body; a bar-shaped weight provided in said head body and having a longitudinal axis extending from a central portion of the backside of said face plate toward a backside of said head body, said longitudinal axis of said bar-shaped weight being substantially perpendicular to a central portion of said face of said face plate; and a back weight provided in said backside of said head body to establish a center of gravity of said golf club head in a position such that a line connecting said center of gravity of said golf club head an a sweet spot thereof coincides with said longitudinal axis of said bar-shaped weight.
Claim 2
Dependent Claim
159 words
A golf club head for a wood type club, comprising: a head body having a front surface inclined upward and backward; a face plate having a face for hitting a golf ball provided in said front surface of said head body; a sole plate provided at the bottom of said head body; a bar-shaped weight provided in said head body and having a longitudinal axis extending from a central portion of the backside of said face plate toward a backside of said head body, said longitudinal axis of said bar-shaped weight being substantially perpendicular to a central portion of said face of said face plate; and a back weight provided in said backside of said head body to establish a center of gravity of said golf club head in a position such that a line connecting said center of gravity of said golf club head an a sweet spot thereof coincides with said longitudinal axis of said bar-shaped weight.
Claim 3
Dependent Claim
22 words
A golf club head according to claim 1, wherein said bar-shaped weight and said back weight are formed as a unitary member.
Claim 4
Dependent Claim
26 words
A golf club head according to claim 1, wherein said bar-shaped weight and said back weight are formed individually and are secured to said head body.
Claim 5
Dependent Claim
29 words
A golf club head according to claim 1 or 3, wherein said bar-shaped weight is formed of a resin-containing metal powder, and said back weight is formed of brass.
Claim 6
Dependent Claim
22 words
A golf club head according to claim 4, wherein a lower surface of said back weight is covered with said sole plate.
Claim 7
Dependent Claim
27 words
A golf club head according to any one of claim 1 to 3, wherein a lower surface of said back weight is covered with said sole plate.
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) | 1991-03-22 | 1991-09-21 | 1992-03-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-03-22 | 1995-09-21 | 1996-03-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-03-22 | 1999-09-21 | 2000-03-22 | $7700.00 | Window Closed / Lapsed |