Callaway Golf Company

Pripro Polymers, Inc.

Pripro Polymer, Inc.

Michael A. Catania

John G Guard

Pijush K Dewanjee

Augustin W Rollinson

Richard C Helmstetter

Ronald K Hettinger

James F Dooley

Joshua G Breier

Herbert Reyes

Robert R Lang

Wayne H Byrne

Joel B Erickson

Thomas J DiMarco

M Grace Hohn Pimentel

Roger C Cleveland

J Neil Hall

Andrew Oldknow

Victor S Dennis

Kamal Sarkar

Uday V Deshmukh

Karl A Clausen

Chris J Wieland

Jesse Bolane

Augustin W Rollison

Luke R Williams

Bart R Fliers

Augustin W Rollinsoni

David B McGrath

A cross-linked thermoplastic polyurea is formed by heating a mixture containing a thermoplastic urethane base material, a monomeric and/or polymeric di-isocyanate comprising between 1 to 10% of the total weight of the mixture, and a diamine comprising between 1 to 10% of the total weight of the mixture. A thermoplastic polyurethane may be formed by substituting hydroquinone for the diamine. The mixture is heated to a temperature within the range of 250&#xb0; F. to 550&#xb0; F. The heated mixture, which is flowable, is then injected into at least one injection molding device. The mixture is then cured at a temperature between 150&#xb0; F. to 250&#xb0; F. for a period of time between 2 and 36 hours. The cross-linked thermoplastic polyurethane/polyurea retains the excellent flowability characteristics of a thermoplastic urethane while the same time exhibits good abrasion, tensile strength, rebound, and compression set characteristics which are similar to those found in thermoset urethanes.

Cross-linked thermoplastic polyurethane/polyurea and method of making same

A process for forming a cross-linked thermoplastic polymer is disclosed herein. The cross-linked thermoplastic polymer is formed by heating a first mixture containing a thermoplastic urethane base material, a monomeric diisocyanate comprising between 1 to 10% of the total weight of the first mixture, and a second mixture of a first diamine and a second diamine comprising between 1 to 10% of the total weight of a total reaction product. The heated first mixture, which is flowable, is injected into at least one injection molding device, with the second mixture injected at predetermined intervals to create a homogeneous reaction product.

The iron golf club head () of the present invention is preferably composed of three main components: a periphery member, a central memberand a face plateThe periphery member () is preferably composed of a high density material such as a nickel-tungsten alloy. The central member () is preferably composed of a lightweight, non-metal material. The face plate () is preferably composed of a titanium alloy material. The iron golf club head () preferably has high moments of inertia Izz and Ixx.

Iron golf club

A method for manufacturing a golf club head with an insert having a face plate is disclosed herein. The insert is disposed in a recess of the club head in which the recess has a depth that is greater than the thickness of the insert. The insert preferably has a plurality of tabs on its perimeter to engage the recess walls to allow the insert to essentially float within the recess. An adhesive is preferably disposed between the rear wall of the recess and an interior surface of the insert. Further, an adhesive is applied between the plurality of tabs, and preferably over the exterior surface of each of the plurality of tabs.

Putter-type golf club head with an insert

A method for manufacturing a golf club head with an insert having a face plate is disclosed herein. The insert is disposed in a recess of the club head in which the recess has a depth that is greater than the thickness of the insert. The insert is preferably composed of a thermoplastic polyurethane material formed from a polytetramethylene ether glycol terminated hexamethylene diisocyanate prepolymer having a NCO group content of 8.0% to 12.0%, and a 1,4 butane diol. An adhesive is preferably disposed between the rear wall of the recess and an interior surface of the insert. Further, an adhesive is applied between the plurality of tabs, and preferably over the exterior surface of each of the plurality of tabs.

An insert composed of a thermoplastic polyurethane materials is disclosed herein. The thermoplastic polyurethane insert is disposed in a recess of the club head in which the recess has a depth that is greater than the thickness of the insert. The thermoplastic polyurethane insert preferably has a plurality of tabs on its perimeter to engage the recess walls to allow the insert to essentially float within the recess. An adhesive is disposed between the rear wall of the recess and an interior surface of the insert. Further, an adhesive is applied between the plurality of tabs, and preferably over the exterior surface of each of the plurality of tabs.

Insert for golf club head

A method for manufacturing a golf club head with a thermoplastic polyurethane insert is disclosed herein. The thermoplastic polyurethane insert is disposed in a recess of the club head in which the recess has a depth that is greater than the thickness of the insert. The thermoplastic polyurethane insert has a plurality of tabs on its perimeter to engage the recess walls to allow the insert to essentially float within the recess. An adhesive is disposed between the rear wall of the recess and an interior surface of the insert. Further, an adhesive is applied between the plurality of tabs, and preferably over the exterior surface of each of the plurality of tabs.

The iron golf club head () of the present invention is preferably composed of three main components: a periphery member, a central memberand a face plate. The periphery member () is preferably composed of a high density material such as a nickel-tungsten alloy. The central member () is preferably composed of a lightweight, non-metal material. The face plate () is preferably composed of a titanium alloy material. The iron golf club head () preferably has high moments of inertia Izz and Ixx.

Iron golf club head

A method for manufacturing an insert having a plurality of tabs thereon in a cast molding operation is disclosed herein. The method commences with mixing a polyurethane prepolymer with a curing agent to form a polyurethane. The mixture is then poured into a mold cavity having a plurality of peripheral cavities. The mold is then subjected to pressure and heat for a predetermined time to cure the mixture thereby forming the polyurethane insert.

Method for manufacturing a golf club head with an insert having integral tabs

A golf club head having a defined internal cavity, and a golf club head containing a bi-material weight having a nonhomogeneous structure is disclosed herein. A method to add the bi-material weight to the golf club entails heating, vibration and cooling to produce the nonhomogeneous structure is also disclosed herein.

Golf club head

The present invention is a golf club ( ) having a club head main body ( ) with a recess ( ), an polymer insert ( ) in the recess ( ), an isolation layer ( ) and a weight body ( ). The polymer insert ( ) is composed of a thermosetting polyurethane material having a Shore D hardness in the range of 42 to 55, and a Bayshore rebound in the range of 51 to 60. The preferred thermosetting polyurethane material is formed from a p-phenylene diisocyanate prepolymer and a curing agent. The golf club ( ) is preferably a putter, however, it may be a wood or an iron. The particular thermosetting polyurethane provides a soft striking face for feel and a good rebound for distance. The weight body ( ) is preferably composed of a tungsten alloy, and the isolation layer ( ) is preferably composed of a thermoplastic polyurethane.

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Oceanside, CA, United States of America

John G Guard