US 6,981,926 B2
Multi-layered core golf ball
Michael J Sullivan, Barrington, R.I. (US); Derek A Ladd, Acushnet, Mass. (US); and Antonio U DeSimas, East Providence, R.I. (US)
Assigned to Acushnet Company, Fairhaven, Mass. (US)
Filed on Mar. 10, 2004, as Appl. No. 10/797,699.
Application 09/172608 is a division of application No. 08/943932, filed on Oct. 03, 1997, granted, now 6,056,842.
Application 10/797699 is a continuation in part of application No. 10/341574, filed on Jan. 13, 2003, granted, now 6,852,044.
Application 10/341574 is a continuation in part of application No. 10/002641, filed on Nov. 28, 2001, granted, now 6,547,677.
Application 10/002641 is a continuation in part of application No. 09/948692, filed on Sep. 10, 2001.
Application 09/948692 is a continuation in part of application No. 09/172608, filed on Oct. 15, 1998, granted, now 6,302,808.
Prior Publication US 2004/0176186 A1, Sep. 09, 2004
This patent is subject to a terminal disclaimer.
Int. Cl. A63B 37/06 (2006.01)
U.S. Cl. 473—376 27 Claims
OG exemplary drawing
 
1. A golf ball comprising:
a multi-layer core having:
a center having a Shore C surface hardness of less than about 80 and a compression of less than 70,
at least one rigid outer core layer having a flex modulus greater than 40,000 psi and a Shore C hardness of greater than 80;
an intermediate core layer interposed between the center and the rigid outer core layer comprised of a fully neutralized ionomer, and having a flex modulus less than 20,000 psi and a Shore C hardness less than 60; and
a cover having a Shore D hardness of less than 65.