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:
Jun. 28, 2016
Filed:
Apr. 17, 2012
Joshua A. Shreve, Franklin, MA (US);
Neal B. Almeida, Cumberland, RI (US);
John Angelosanto, North Attleboro, MA (US);
Joseph A. Luongo, Walpole, MA (US);
Joshua A. Shreve, Franklin, MA (US);
Neal B. Almeida, Cumberland, RI (US);
John Angelosanto, North Attleboro, MA (US);
Joseph A. Luongo, Walpole, MA (US);
WATERS TECHNOLOGIES CORPORATION, Milford, MA (US);
Abstract
Described are embodiments of a pump that can be used, for example, in liquid chromatography applications. The pump includes a seal wash housing, pump head and seal assembly. A wear-resistant coating applied to a sealing surface or gland of the pump head or seal wash housing improves the hardness and chemical compatibility of the sealing surface. Oxidation of the sealing surface is reduced so that the sealing surface is less abrasive to the seal assembly and the lifetime of the seal assembly is increased.