Flush valve with snap-on flapper

• US 4,841,579 A
• Filed: 11/20/1987
• Issued: 06/27/1989
• Est. Priority Date: 11/20/1987
• Status: Expired due to Term

• Current Assignee: Bruce A Antunez
• Original Assignee: Bruce A Antunez
• Inventors: Antunez, Bruce A.
• Primary Examiner(s): Phillips, Charles E.
• Application Number:
  US07/123,444
• Time in Patent Office: 585 Days
• Field of Search: 4/378, 4/392, 4/393, 4/395, 4/390, 4/391, 4/402-404
• US Class Current: 4/393
• CPC Class Codes: E03D 1/35 Flushing valves having buoyancy

Abstract

A rigid flapper type valve having a backing plate has been provided with a valve seal in the form of a flexible disc mounted to the bottom of the flapper valve. During sealing the disc will flex to contact the backing plate. A vent hole is provided in the backing plate to vent the area between the disc and plate.

Claims

1. A seal assembly for a valve flapper, said assembly comprising:

a rigid backing disc having a flat backing face and a central post extending from it; and

a resilient deformable seal shaped as a flat disc mounted to said post in circumferential sealing contact with said post, said seal having a flat face spaced from the backing face of said backing disc near the post, said backing disc having a vent port therethrough near said central post and opening through said face into the space between the respective faces wherein, with said valve resting on a valve seat said deformable disc will contact said flat backing face along the periphery of said disc and backing face to create a space which is vented by said opening.

2. A seal assembly according to claim 1 in which said post forms a portion of said backing plate, extending therefrom and having a peripheral groove therein to receive the inside edge of a hole through said seal disc.

3. A seal according to claim 1 in which said seal assembly is made of material that is resistant to water supplies and to chemicals characteristically found in toilet tanks.