Pneumatic check valve and method for making same

• US 5,386,848 A
• Filed: 02/22/1994
• Issued: 02/07/1995
• Est. Priority Date: 02/22/1994
• Status: Expired due to Fees

• Current Assignee: Alliedsignal Inc. (Honeywell International Inc.)
• Original Assignee: Alliedsignal Inc. (Honeywell International Inc.)
• Inventors: McCoy, Kevin, Gilchrist, Raymond T.
• Primary Examiner(s): Hepperle, Stephen M.
• Application Number:
  US08/199,865
• Time in Patent Office: 350 Days
• Field of Search: 137/510, 137/859, 137/315, 92/98 R, 251/61.1
• US Class Current: 137/510
• CPC Class Codes: F16K 15/144 the closure elements being fixed along all or a part of their periphery
• CPC Class Codes: F16K 17/0453 the member being a diaphragm
• CPC Class Codes: Y10T 137/6086 Assembling or disassembling check valve
• CPC Class Codes: Y10T 137/7836 Flexible diaphragm or bellows reactor
• CPC Class Codes: Y10T 29/49419 including machining or drilling

Abstract

A two-piece check valve employing an elastomeric diaphragm retained between two lands of an integral member. The integral member forms a boss on which the diaphragm is seated, and cooperates with the diaphragm to form a chamber surrounding the boss.

Claims

1. A check valve comprising in combination:

a circular diaphragm; and

an integral cylindrical member having first and second axial ends, a portion near the first axial end having a C-shaped cross section and forming opposing annular lands;

an annular peripheral portion of the diaphragm being captively retained between the opposing annular lands and the diaphragm being directly exposed to ambient pressure;

the member forming a central annular boss projecting toward the diaphragm and terminating at an annular valve seat;

the diaphragm abutting the valve seat to form the valve;

the member cooperating with the diaphragm to form an annular chamber circumscribing the annular boss;

the member having an outlet port, a first passageway extending from the outlet port to the annular boss, an inlet port, and a second passageway extending from the inlet port to the annular chamber.

2. A check valve comprising in combination:

a diaphragm; and

an integral member having first and second axial ends, a portion near the first axial end forming opposing lands;

a peripheral portion of the diaphragm being captively retained between the opposing lands and the diaphragm being directly exposed to ambient pressure;

the member forming a central boss projecting toward the diaphragm and terminating at a valve seat;

the diaphragm abutting the valve seat to form the valve;

the member cooperating with the diaphragm to form a chamber surrounding the boss;

the member having an outlet port, a first passageway extending from the outlet port to the boss, an inlet port, and a second passageway extending from the inlet port to the chamber.