Golf club and method of making same

Details Golf club and method of making same Golf club and method of making same

1992-01-08

1993-02-16

Eley, Timothy V.

Metal working

Method of mechanical manufacture

Assembling or joining

29508, 295273, 295274, 264 467, 26432816, 273 78, 273 803, 273173, B23P 1904, B21D 3900, B29C 6700, A63B 5304

Patent

active

051859149

ABSTRACT:
A golf club includes a straight shaft and a metallic member having a first end connected to the lower end of the shaft. The other end of the metallic member is bent to define an obtuse angle with the first end. In a preferred form, a flat metallic stiffener plate is welded or otherwise affixed to one side of the metallic member. These portions are placed in a suitable mold into which polyurethane is admitted, and heat is differentially applied to or removed from the various surfaces of the mold in order that the polyurethane solidifies to form a substantially flat striking layer of dense integral-skin polyurethane juxtaposed against the stiffener plate remote from the metallic member, and a back cushion enclosing the stiffener plate and all of the metallic member. The back cushion is thicker than the striking layer, and is of polyurethane less dense than that of the striking layer. Preferably, the stiffener plate has marginal portions extending beyond the metallic member, and these marginal portions have apertures through which the polyurethane of the striking layer can integrally bond with the polyurethane of the back cushion.

REFERENCES:
patent: 3140094 (1964-07-01), Hings
patent: 3266805 (1966-08-01), Bulla
patent: 3571900 (1971-03-01), Hardesty
patent: 4076254 (1978-02-01), Nygren
patent: 4438931 (1984-03-01), Motomiya
patent: 4451042 (1984-05-01), Hayashi et al.
patent: 4545580 (1985-10-01), Tomita et al.
patent: 4988104 (1991-01-01), Shiotani et al.
patent: 5000454 (1991-03-01), Soda
patent: 5009425 (1991-04-01), Olumoto et al.

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