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:
Feb. 02, 1988
Filed:
Jun. 05, 1981
Jack L Wissman, Xenia, OH (US);
The Duriron Company, Inc., Dayton, OH (US);
Abstract
A lined pump is provided including a casing and cover assembly forming a chamber having an inlet and an outlet. The fluid contacted surfaces of the pump are lined with PFA resin. These linings may be formed by an injection or other suitable molding process and are restrained against undesirable movement by locking plates. The locking plates may take the form of perforated metal plates attached to the pump casing and cover through which the resin flows during molding so as to become embedded in areas of the liners and lock those areas in place. Proper placement of the locking plates provides both restrained and unrestrained liner areas which permit the dissipation of built up internal stresses in the resin material due to thermal and hydraulic forces. This avoids cracking and failure while preserving the dimensional stability of the liners.