SWING-WEIGHT-ADJUSTABLE GOLF CLUBS AND CLUBHEADS
First Claim
1. A golf club, comprising:
- an iron-type clubhead comprising a body having a front and a rear, the front including a strike face, the rear including a weight-receiving cavity, and the body having a center of gravity (CG) having respective X-, Y-, and Z-coordinates;
a shaft connected to the clubhead, thereby forming the golf club having a nominal swing-weight;
a weight-assembly removably attached as a unit to the weight-receiving cavity, the weight-assembly having a corresponding assembled total mass providing a corresponding swing-weight (SW) contribution to the club, the weight-assembly comprising at least a first portion, a second portion, and a third portion each contributing a respective mass portion to the assembled total mass of the weight-assembly and thus to the SW contribution made by the weight-assembly to the club, whereinthe total mass of the weight-assembly linearly displaces the CG location no more than 1.7 mm with the weight-assembly attached to the body compared to a CG location of the clubhead when the weight-assembly is not attached to the body.
12 Assignments
0 Petitions
Accused Products
Abstract
Clubs and clubheads are disclosed that allow the swing-weight thereof to be easily changed by attaching or exchanging a “weight-assembly” having a first portion configured as a “weight insert,” a second portion configured as an overcap, and a third portion configured as a drive screw. The drive screw extends through the overcap and into the weight-insert to assemble the weight-assembly, which fits into a weight-receiving cavity on the clubhead. These three components are made of respective materials (having respective densities) that are selected so that each component contributes a desired fraction of the total mass of the weight-assembly to the clubhead to achieve a desired change in swing-weight. By mix-match selection of the components, a wide range of masses of the weight assemblies can be made, with small increments therebetween.
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Citations
20 Claims
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1. A golf club, comprising:
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an iron-type clubhead comprising a body having a front and a rear, the front including a strike face, the rear including a weight-receiving cavity, and the body having a center of gravity (CG) having respective X-, Y-, and Z-coordinates; a shaft connected to the clubhead, thereby forming the golf club having a nominal swing-weight; a weight-assembly removably attached as a unit to the weight-receiving cavity, the weight-assembly having a corresponding assembled total mass providing a corresponding swing-weight (SW) contribution to the club, the weight-assembly comprising at least a first portion, a second portion, and a third portion each contributing a respective mass portion to the assembled total mass of the weight-assembly and thus to the SW contribution made by the weight-assembly to the club, wherein the total mass of the weight-assembly linearly displaces the CG location no more than 1.7 mm with the weight-assembly attached to the body compared to a CG location of the clubhead when the weight-assembly is not attached to the body. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. A golf-club kit, comprising:
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at least one iron-type golf club comprising a shaft and a clubhead connected to the shaft, the clubhead having a body of which a center of gravity (CG) is located at respective X-, Y-, and Z-coordinates, the clubhead having a front and a rear, the club having a respective swing-weight and comprising a weight-receiving cavity extending into the body from the rear; and a plurality of weight-assemblies each having a substantially identical size but having a different respective total mass, the weight-assemblies being selectable for individual attachment to the weight-receiving cavity so as to provide the club with a corresponding selected swing-weight, each weight-assembly comprising a first, a second, and a third portion each contributing a respective mass portion to the respective total mass of the weight-assembly for swing-weighting, wherein in each weight-assembly in the kit, the third portion extends through the respective second portion and is coupled to the respective first portion, and the first portion of the selected weight-assembly is attachable in the weight-receiving cavity; the respective mass portions of the first, second, and third portions are determined by the volume and density of respective materials from which the first, second, and third portions are made; and the weight-assemblies in the kit include a series of selectable weight-assemblies having corresponding assembled total masses that progressively differ from one another in the series by a designated mass increment. - View Dependent Claims (15, 16)
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17. A golf-club set, comprising:
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a plurality of iron-type clubheads including at least a first iron-type clubhead and a second iron-type clubhead; a first weight-assembly including a first portion, a second portion, and a third portion, the first weight-assembly being attached to the first iron-type clubhead; and a second weight-assembly including a first portion, a second portion, and a third portion, the second weight-assembly being attached to the second iron-type clubhead; wherein at least one of the first portion, second portion, and third portion of the first weight-assembly varies in density with respect to the first portion, second portion, and third portion of the second weight-assembly. - View Dependent Claims (18, 19, 20)
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Specification