Adjustable loft golf club

• US 5,928,087 A
• Filed: 08/05/1997
• Issued: 07/27/1999
• Est. Priority Date: 08/05/1997
• Status: Expired due to Fees

• Current Assignee: Thomas Ramsay Watson
• Original Assignee: Thomas Ramsay Watson
• Inventors: Watson, Thomas Ramsay, Harvey, George Thomas, Emberton, Elaine Simone
• Primary Examiner(s): Passaniti, Sebastiano
• Application Number:
  US08/906,272
• Time in Patent Office: 721 Days
• Field of Search: 473/288, 473/245, 473/246, 473/247, 403/97
• US Class Current: 473/245
• CPC Class Codes: A63B 53/026 loft angle only, i.e. relative angular adjustment between the shaft and the club head about a horizontal axis perpendicular to the intended line of play when the club is in its normal address position
• CPC Class Codes: A63B 53/0441 with visual indicators for aligning the golf club
• CPC Class Codes: A63B 53/047 iron-type
• CPC Class Codes: A63B 53/06 adjustable
• CPC Class Codes: A63B 60/00 Details or accessories of golf clubs, bats, rackets or the like
• CPC Class Codes: A63B 60/0085 Telescopic shafts
• CPC Class Codes: Y10T 403/32368 including radial interengaging tongue and slot or serrations

Abstract

A golf club having a blade which is securable to the shaft of the club at a plurality of different angular positions to vary the loft of the striking face of the blade. The invention is a substitute for an entire set of iron golf clubs, including a putter. The club shaft has a frustoconical spline at a lower end thereof having a plurality of teeth which taper inwardly. The spline is received in a mating socket formed at the tail end of the blade when the blade and shaft are releasably coupled together.

Claims

1. An adjustable loft golf club comprising:

(a) a shaft having a frustoconical-shaped spline at a lower end thereof, said spline having a first central axis and comprising a plurality of circumferentially spaced first teeth which taper inwardly toward said first central axis;

(b) a blade having a recessed socket at a heel end thereof for matingly receiving said spline, wherein said socket comprises a second central axis and a plurality of circumferentially spaced second teeth which taper outwardly in a direction away from said second central axis; and

(c) fastening means for releasably coupling said blade and said shaft together when said first and second central axes are aligned such that said first teeth lockably inter-engage with said second teeth to maintain said blade at a selected angular position relative to said shaft.

2. The golf club as defined in claim 1, wherein said first teeth taper inwardly at an angle of approximately 45°

relative to said first central axis.

3. The golf club as defined in claim 2, further comprising indicia on an outer surface of said shaft lower end which is alignable with a marking on an outer surface of said socket to enable adjustment of said golf club to said selected angular position.

4. The golf club as defined in claim 2, wherein said spline is annular and wherein said fastening means comprises:

(a) an elongated member projecting from said socket and insertable through an aperture formed in a lower portion of said shaft; and

(b) a fastener for releasably engaging a free end of said elongated member.

5. A golf club as defined in claim 4, wherein said elongated member comprises an externally threaded bolt and wherein said fastener comprises an internally threaded nut.

6. A golf club as defined in claim 1, wherein said spline comprises approximately 80 of said first teeth.

7. An adjustable loft golf club comprising:

(a) a shaft;

(b) a blade; and

(c) a fastener for releasably coupling said shaft and said blade together, wherein one of said shaft and said blade comprises a frustoconical-shaped spline, said spline having a first central axis and a plurality of circumferentially spaced first teeth which taper inwardly toward said first central axis, and the other of said shaft and said blade comprises a socket for matingly receiving said spline, said socket comprising a second central axis and a plurality of circumferentially spaced second teeth which taper outwardly in a direction away from said second central axis, wherein said first teeth lockably inter-engage with said second teeth when said fastener is secured to maintain said blade at a selected angular position relative to said shaft.