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US3693978A Expired / Lapsed US ⏱️ 0.0 years remaining

Symmetrical golf club head with center of gravity coincident with geometric center

Assignee: Individual
•
Filing: 1969-11-13
•
Granted: 1972-09-26
•
Expires: 1989-11-13
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Abstract

Abstract A wood type gold club in which the head is comprised of a molded, high impact, plastic material of uniform density and is homogenous throughout, both as regards density and weight, embodies similarly lofted front and rear faces, has its geometric center coinciding with its center of gravity, is symmetrical with respect to a vertical plane passing centrally and longitudinally therethrough and also through the axis of the shaft, and is so constructed, dimensioned, shaped and proportioned that when the club is supported in pendulum fashion from the proximate end of the club shaft, the plumb line axis passes through the common or coincident geometric center and center of gravity of the head.

Inventors

  • 👤 Victor East

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-11-05 17:42
CPC Classifications
A; A63; A63B; A63B53/00; A63B53/04; A63B53/0433; A63B53/0458; A63B53/0462; A63B53/0466; A63B60/00

Claims Analysis

Total Claims: 4
Claim 1
Independent Claim 248 words
As a new article of manufacture, a golf club comprising a straight, normally upstanding shaft having an upper proximate end and a lower distal end, and a symmetrical, horizontally elongated ''''wood'''' type head at the distal end of the shaft, said head being formed throughout of molded, high impact, plastic material of uniform density and embodying toe and heel portions at its opposite ends, a substantially flat bottom face, and an integrally formed, upwardly and outwardly extending hosel on its heel portion, said shaft having the distal end thereof connected to said hosel and being dIsposed in coaxial relation with the latter, said head also embodying a substantially flat and lofted front striking face and a substantially flat rear face with a loft the same as the loft of the front striking face, said front and rear faces being symmetrical with respect to a vertical plane passing centrally and longitudinally through the head and the common axes of said shaft and hosel, and, in addition, being each spaced equidistantly from said plane throughout its entire length, said head being designed so that its geometric center and its center of gravity are coincident and lie in the aforementioned plane, said golf club as a whole being constructed, dimensioned, shaped and proportioned so that when it is freely suspended from the upper proximate end of the shaft a plumb line axis passing through the point of suspension will intersect said coincident geometric center and center of gravity of the head.
Claim 2
Dependent Claim 248 words
As a new article of manufacture, a golf club comprising a straight, normally upstanding shaft having an upper proximate end and a lower distal end, and a symmetrical, horizontally elongated ''''wood'''' type head at the distal end of the shaft, said head being formed throughout of molded, high impact, plastic material of uniform density and embodying toe and heel portions at its opposite ends, a substantially flat bottom face, and an integrally formed, upwardly and outwardly extending hosel on its heel portion, said shaft having the distal end thereof connected to said hosel and being dIsposed in coaxial relation with the latter, said head also embodying a substantially flat and lofted front striking face and a substantially flat rear face with a loft the same as the loft of the front striking face, said front and rear faces being symmetrical with respect to a vertical plane passing centrally and longitudinally through the head and the common axes of said shaft and hosel, and, in addition, being each spaced equidistantly from said plane throughout its entire length, said head being designed so that its geometric center and its center of gravity are coincident and lie in the aforementioned plane, said golf club as a whole being constructed, dimensioned, shaped and proportioned so that when it is freely suspended from the upper proximate end of the shaft a plumb line axis passing through the point of suspension will intersect said coincident geometric center and center of gravity of the head.
Claim 3
Dependent Claim 71 words
A golf club according to claim 1 and having, additionally, a sole plate positioned and secured in a correspondingly shaped recess in said bottom face of the head, embodying a generally hourglass shape, having end portions of exactly the same shape and size, and positioned so that its end portions lie on opposite sides of said plane to the end that the sole plate is symmetrical with respect to the plane.
Claim 4
Dependent Claim 80 words
A golf club according to claim 1 and wherein the lofted front striking face of the head has in the central portion thereof a restricted area which is formed by a series of spaced apart vertical grooves and also a series of spaced apart horizontal grooves arranged in intersecting relation with the vertical grooves and forming therewith a checkerboard pattern, said checkerboard pattern being symmetrically arranged with respect to the coincident geometric center and center of gravity of the head.

References Cited (Backward Citations)

US786268A Cited
US1504380A Cited
US1574915A Cited
GB231053A Cited
GB386269A Cited
US2023885A Cited
US2457084A Cited
US2472978A Cited
US2846228A Cited
US3199872A Cited
US3266805A Cited

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1975-09-26 1976-03-27 1976-09-26 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1979-09-26 1980-03-27 1980-09-26 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1983-09-26 1984-03-27 1984-09-26 $7700.00 Window Closed / Lapsed

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