"Iron"-type golf club head
First Claim
1. An iron-type golf club head comprising a hollow metal body incorporating an internal cavity delimited by a plurality of walls, including an impact wall attached peripherally at all points to other walls, wherein said impact wall has an internal surface coated with a thin layer of a viscoelastic resin having damping properties, said resin layer only partially filling said internal cavity and having a specific gravity between 1 and 2, said layer being adapted for molding under low pressure or by gravity subsequent to formation of said golf club head using a reaction injection molding process (RIM).
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Accused Products
Abstract
An iron-type golf club head comprising a hollow metal body (1) incorporating an internal cavity (2) delimited by a series of walls (10, 11, 12, 13) including an impact wall (10) connected peripherally at all points to other walls (11, 12, 13). The inner surface (100) of the impact wall (10) is coated with a thin layer (4) of a viscoelastic resin which has damping properties, and which fills only a portion of the internal cavity (2). The resin layer assures reduced interference vibrations peculiar to "hollow" irons, i.e., those incorporating an internal cavity for improved weight distribution.
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Citations
7 Claims
- 1. An iron-type golf club head comprising a hollow metal body incorporating an internal cavity delimited by a plurality of walls, including an impact wall attached peripherally at all points to other walls, wherein said impact wall has an internal surface coated with a thin layer of a viscoelastic resin having damping properties, said resin layer only partially filling said internal cavity and having a specific gravity between 1 and 2, said layer being adapted for molding under low pressure or by gravity subsequent to formation of said golf club head using a reaction injection molding process (RIM).
Specification