Pump diaphragm

• US 5,349,896 A
• Filed: 06/14/1993
• Issued: 09/27/1994
• Est. Priority Date: 06/14/1993
• Status: Expired due to Term

• Current Assignee: W. L. Gore & Associates (W.L. Gore & Associates)
• Original Assignee: W. L. Gore & Associates (W.L. Gore & Associates)
• Inventors: Connelly, John M. Jr., Sicker, Fred C., Delaney, William E. III
• Primary Examiner(s): Denion, Thomas E.
• Application Number:
  US08/076,605
• Time in Patent Office: 470 Days
• Field of Search: 92/96, 92/97, 92/98 R, 92/99, 92/100, 92/101, 92/102, 92/103 R, 92/103 R, 92/103 F, 92/103 SP, 92/104, 92/105, 92/47
• US Class Current: 92/98.00R
• CPC Class Codes: B29L 2031/755 Membranes, diaphragms
• CPC Class Codes: F04B 43/0054 particularities of the flexible members
• CPC Class Codes: F16J 3/02 Diaphragms

Abstract

A flexible pump diaphragm for pumping fluids is described in which the diaphragm has a number of ribs or troughs located radially across its circumferential flexure portion.

Claims

1. A pump diaphragm having a circularly-configured body having a convex face side and a concave air-pressure receiving side consisting of a composite in which the convex face side is mace of polytetrafluoroethylene and the concave air-pressure receiving side is made of a resilient elastomeric material;

said body having a central opening for receiving a piston rod;

said body having a generally annular flexure portion that flexes in operation;

said body having on the face side a plurality of radially disposed uniformly spaced ribs extending radially outwardly across said flexure portion.