US 11,839,796 B2
Golf ball with softer feel and higher iron spin
Dean A. Snell, Carlsbad, CA (US); and Eric M. Loper, Carlsbad, CA (US)
Assigned to Taylor Made Golf Company, Inc., Carlsbad, CA (US)
Filed by Taylor Made Golf Company, Inc., Carlsbad, CA (US)
Filed on Oct. 4, 2021, as Appl. No. 17/493,604.
Application 14/571,108 is a division of application No. 12/343,151, filed on Dec. 23, 2008, granted, now 8,932,154, issued on Jan. 13, 2015.
Application 17/493,604 is a continuation of application No. 16/865,084, filed on May 1, 2020, granted, now 11,167,178.
Application 16/865,084 is a continuation of application No. 15/921,522, filed on Mar. 14, 2018, granted, now 10,675,510, issued on Jun. 9, 2020.
Application 15/921,522 is a continuation of application No. 14/571,108, filed on Dec. 15, 2014, granted, now 9,950,216, issued on Apr. 24, 2018.
Claims priority of provisional application 61/009,416, filed on Dec. 28, 2007.
Prior Publication US 2022/0023722 A1, Jan. 27, 2022
This patent is subject to a terminal disclaimer.
Int. Cl. A63B 37/06 (2006.01); A63B 37/00 (2006.01)
CPC A63B 37/0076 (2013.01) [A63B 37/0003 (2013.01); A63B 37/0031 (2013.01); A63B 37/0033 (2013.01); A63B 37/0039 (2013.01); A63B 37/0043 (2013.01); A63B 37/0045 (2013.01); A63B 37/0065 (2013.01); A63B 37/0092 (2013.01); A63B 37/00621 (2020.08)] 5 Claims
OG exemplary drawing
 
1. A four-piece ball comprising:
(a) a core comprising a pyridine peptizer;
(b) a mantle layer adjacent to the core, wherein the mantle layer comprises a mixture of an ethylene/methacrylic acid copolymer ionomer in which the methacrylic acid groups have been partially neutralized with sodium ions and an ethylene/methacrylic acid copolymer ionomer in which the methacrylic acid groups have been partially neutralized with zinc ions, and the mantle layer has a material Shore D hardness of 45 to 75 and a thickness of at least 0.030 in.;
(c) an inner cover layer adjacent to the mantle layer, wherein the inner cover layer has a material Shore D hardness of 42 and comprises a polyurethane made from a polytetramethylene ether glycol terminated toluene diisocyanate prepolymer, and the inner cover layer has a thickness of less than or equal to 0.020 in.; and
(d) an outer cover layer adjacent to the inner cover layer, wherein the outer cover layer is selected from a thermoset polyurethane or a thermoset polyurea and the outer cover layer has a material Shore D hardness of 30 to 70, and the outer cover layer has a thickness of at least 0.030 in.,
and wherein the inner cover layer has a material Shore D hardness that is at least 3 units less than the material Shore D hardness of the outer cover layer.