Throttle body

Details Throttle body Throttle body

2008-01-08

2008-01-08

Jacyna, J. Casimer (Department: 3754)

Valves and valve actuation

Rotary valves

Butterfly

C251S368000, C123S337000

Reexamination Certificate

active

11273905

ABSTRACT:
A lightweight, low cost throttle body and throttle valve placed in the body, both formed of resins, that resolve the problem of excessively large gap formation is disclosed. Circumferentially oriented filler contained in a resin forming a throttle valve compensates to make the radial linear expansion coefficient of the throttle valve substantially equal to that of a bore. Grooves are formed on concentric circles in the throttle valve to orient filler circumferentially. A throttle valve provided with circumferentially oriented filler can be formed by impregnating an aggregate formed by circumferentially arranging the filler with a resin and curing the resin. A rib is formed in a part near a throttle shaft to control molding shrinkage so that the roundness of the bore is small.

REFERENCES:
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patent: 5704335 (1998-01-01), Akutagawa et al.
patent: 6065483 (2000-05-01), Tanaka et al.
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patent: 6354267 (2002-03-01), Kotchi et al.
patent: 6451238 (2002-09-01), Suzuki et al.
patent: 07-166898 (1995-06-01), None
patent: 08-014069 (1996-01-01), None
patent: 09-032590 (1997-02-01), None
patent: 10-169473 (1998-06-01), None

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