Flapper valve with mold-in-place bearings

Details Flapper valve with mold-in-place bearings Flapper valve with mold-in-place bearings

2006-05-04

2009-12-01

Lee, Kevin L (Department: 3753)

Fluid handling

Processes

Cleaning, repairing, or assembling

C251S305000, C029S890120

Reexamination Certificate

active

07624750

ABSTRACT:
A flapper valve and a method of making the same that does not require bearing assembly. More particularly, the flapper valve includes a shaft having one or more flap portions and one or more bearing portions molded in place on the shaft as a unitary structure. The bearing portions are separated from adjacent flap portions and/or the shaft thereby forming a bearing that rotates independently of flap portions on the shaft. Accordingly, the flapper valve with mold-in-place bearings does not require bearings to be separately assembled or installed prior to installation of the valve.

REFERENCES:
patent: 4158352 (1979-06-01), Blatter
patent: 4771740 (1988-09-01), Koike
patent: 4836499 (1989-06-01), Steele et al.
patent: 4856558 (1989-08-01), Kardos
patent: 5715782 (1998-02-01), Elder
patent: 6235231 (2001-05-01), Martin
patent: 6612325 (2003-09-01), Rentschler et al.
patent: 6626421 (2003-09-01), Torii et al.
patent: 6626422 (2003-09-01), Kaiser
patent: 6698717 (2004-03-01), Brookshire et al.
patent: 6837261 (2005-01-01), Rentschler et al.
patent: 6877723 (2005-04-01), Martinsson et al.
patent: 6901942 (2005-06-01), Krimmer et al.

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