The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Oct. 19, 2010
Filed:
Dec. 19, 2008
Michael J. Sullivan, Barrington, RI (US);
Brian Comeau, Berkley, MA (US);
William B. Lacy, Plymouth, MA (US);
Michael J. Sullivan, Barrington, RI (US);
Brian Comeau, Berkley, MA (US);
William B. Lacy, Plymouth, MA (US);
Acushnet Company, Fairhaven, MA (US);
Abstract
A golf ball comprising a thermoplastic inner core layer that has a geometric center hardness greater than its surface hardness to define a 'negative' hardness gradient. An outer core layer is disposed about the inner core and is formed from a substantially homogenous thermoset composition, typically rubber, and has an inner surface hardness substantially less than its outer surface hardness to define a 'positive' hardness gradient. An inner cover layer is disposed about the outer core layer and an outer cover layer is disposed about the inner cover layer. The “negative” hardness gradient of the inner core is typically −1 to −5 Shore C and the “positive” hardness gradient of the core layer is typically at least 25 Shore C. The difference between the inner core surface hardness and the outer core inner surface hardness, Δh, should be at least 25 Shore C.