Apparatus for determining the swing inertia of golf clubs
OwnerLouis W. Johnson, Bruce G. Johnsoninventors
Life of this patent
Estimating the term…
Abstract
A scale is provided for establishing a swing inertia value of golf clubs by providing support means arranged to contact the grip portion of the club such that the axis of rotation of a person's grip on the grip portion of the club when in the act of swinging the club is disposed vertically above the pivotal axis of a balance beam of the scale. The scale supports a golf club for determining such swing inertia value and includes calibrations which comprise values determined by multiplying the head weight of the club by the length of the club shaft extending from the pivotal axis of the balance beam to the center of gravity of the club head. The scale can also be used to determine the head weight of a club.
Claims8
A scale for weighing golf clubs to determine the swing inertia thereof, said clubs having a head portion, a shaft portion, and a grip portion for receiving the golfer's hands in adjacent gripped relation, said scale comprising
- a base,
- a balance beam having pivot support on said base,
- calibrations on one of said base and beam providing a set of values of swing inertia,
- and support means on said balance beam having forward and rearward support portions for supporting a golf club in parallel relation with said balance beam,
- said rearward support portion being adjustable along said balance beam and arranged to contact the grip portion of the club and locate the club such that the axis of rotation of a person's normal grip on said grip portion for swinging the club is disposed vertically above the pivotal axis of said balance beam,
- said calibrations comprising values determined by multiplying the head weight of the club by the length of the club extending from the said pivotal axis to the center of gravity of the head.
A scale for weighing golf clubs to determine the swing inertia thereof, said clubs having a head portion, a shaft portion, and a grip portion for receiving the golfer's hands in adjacent gripped relation, said scale comprising
- a base,
- a balance beam having pivot support on said base,
- calibrations on one of said base and beam providing a set of values of swing inertia,
- and support means on said balance beam having forward and rearward support portions for supporting a golf club in parallel relation with said balance beam,
- said rearward support portion being adjustable along said balance beam and arranged to position the grip portion of the club such that a point in the grip portion which is halfway between the normal gripped portion thereof is disposed vertically above the pivotal axis of said balance beam,
- said calibrations comprising values determined by multiplying the head weight of the club by the length of the club extending from the said pivotal axis to the center of gravity of the head.
A scale for weighing golf clubs to determine the swing inertia thereof, said clubs having a head portion, a shaft portion, and a grip portion for receiving the golfer's hands in adjacent gripped relation, said scale comprising
- a base,
- a balance beam having pivot support on said base,
- calibrations on one of said base and beam providing a set of values of swing inertia,
- and support means on said balance beam having forward and rearward support portions for supporting a golf club in parallel relation with said balance beam,
- said support means having one fixed support and one adjustable abutment which permits locating the grip portion on the shaft at any point relative to the pivotal axis of the beam,
- said calibrations comprising values determined by multiplying the head weight of the club by the length of the club extending from the said pivotal axis to the center of gravity of the head.
Dependencies are inferred from the claim text.