Patent US4936582A successfully refreshed from Google Patents.
US4936582A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Golf club
Assignee: Individual
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Filing: 1989-02-24
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Granted: 1990-06-26
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Expires: 2009-02-24
Abstract
Abstract This invention is comprised of a golf club molded in a single piece including grip, shaft and head, preferably in the form of a putter or a wedge or in an alternative embodiment a golf club employing a flexible plastic shaft with a conventional grip and club head. These clubs are molded out of rubber or a flexible plastic material with appropriate physical properties to approximate the appearance and feel of a conventional golf club. However, the characteristics of rubber or rubber like material permit the club to be bent, twisted or deformed by violent contact with the ground or other objects. The material of construction permits a club after such distortion to be returned to its initial shape. These characteristics are designed primarily to permit a frustrated golfer to vent his feelings of frustration or dissatisfaction in a way that is non-destructive of his equipment. The preferred material for the molded club or the shaft is either polyurethane of 75 durometer; Shore D rating or natural rubber of 70 durometer Shore A rating, each with 2000 psi tensile strength.
Inventors
- 👤 Kenneth Bernstein
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 23:49
CPC Classifications
A; A63; A63B; A63B53/00; A63B60/00; A63B53/007; A63B60/0081; Y; Y10; Y10S; Y10S273/00; Y10S273/08
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
95 words
A golf club which is comprised of a handle, a shaft, and a head, all molded together from an appropriate flexible material, said club having structural characteristics corresponding to those resulting from being molded out of either natural rubber having a 70 durometer, Shore A rating, or high impact extra-hard polyurethane of 75 durometer Shore D rating, each with a 2,000 psi tensile strength, so that said club has sufficient rigidity to be used to play the game of golf and sufficient flexibility to restore its shape after having been bent to vent one's frustration.
Claim 2
Dependent Claim
95 words
A golf club which is comprised of a handle, a shaft, and a head, all molded together from an appropriate flexible material, said club having structural characteristics corresponding to those resulting from being molded out of either natural rubber having a 70 durometer, Shore A rating, or high impact extra-hard polyurethane of 75 durometer Shore D rating, each with a 2,000 psi tensile strength, so that said club has sufficient rigidity to be used to play the game of golf and sufficient flexibility to restore its shape after having been bent to vent one's frustration.
Claim 3
Dependent Claim
14 words
A golf club as recited in claim 1 wherein said club is a putter.
Claim 4
Dependent Claim
14 words
A golf club as recited in claim 1 wherein said club is a wedge.
Claim 5
Dependent Claim
106 words
A golf club which is comprised of a flexible shaft to which at one end a grip is fixedly attached and at the other end a head is fixedly attached, the structural characteristics of said shaft corresponding to those resulting from being molded out of either high impact extra-hard polyurethane having a 75 durometer Shore D rating, or natural rubber having a 70 durometer Short A rating, each with an approximately 2000 psi tensile strength, so that said club has sufficient rigidity to be used to play the game of golf and sufficient flexibility to restore its shape after having been bent to vent one's frustration.
Claim 6
Dependent Claim
106 words
A golf club which is comprised of a flexible shaft to which at one end a grip is fixedly attached and at the other end a head is fixedly attached, the structural characteristics of said shaft corresponding to those resulting from being molded out of either high impact extra-hard polyurethane having a 75 durometer Shore D rating, or natural rubber having a 70 durometer Short A rating, each with an approximately 2000 psi tensile strength, so that said club has sufficient rigidity to be used to play the game of golf and sufficient flexibility to restore its shape after having been bent to vent one's frustration.
Claim 7
Dependent Claim
17 words
A golf club as recited in claim 4 wherein said shaft is approximately 5/8 inch in diameter.
Claim 8
Dependent Claim
90 words
A golf club which is comprised of a flexible shaft to which at one end a grip is fixedly attached and at the other end a head is fixedly attached, the structural characteristics of said shaft corresponding to those resulting from being molded out of natural rubber of 70 durometer shore A rating with approximately 2000 psi tensile strength so that said club has sufficient rigidity to be used to play the game of golf and sufficient flexibility to restore its shape after having been bent to vent one's frustration.
Claim 9
Dependent Claim
90 words
A golf club which is comprised of a flexible shaft to which at one end a grip is fixedly attached and at the other end a head is fixedly attached, the structural characteristics of said shaft corresponding to those resulting from being molded out of natural rubber of 70 durometer shore A rating with approximately 2000 psi tensile strength so that said club has sufficient rigidity to be used to play the game of golf and sufficient flexibility to restore its shape after having been bent to vent one's frustration.
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) | 1993-06-25 | 1993-12-25 | 1994-06-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-06-25 | 1997-12-25 | 1998-06-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-06-25 | 2001-12-25 | 2002-06-26 | $7700.00 | Window Closed / Lapsed |