Forming method of throttle apparatus for internal combustion...

Details Forming method of throttle apparatus for internal combustion... Forming method of throttle apparatus for internal combustion...

2006-09-19

2006-09-19

Bryant, David P. (Department: 3729)

Metal working

Method of mechanical manufacture

Prime mover or fluid pump making

C029S888450, C029S888460, C029S527100, C264S242000, C264S328800, C264S334000, C425S812000

Reexamination Certificate

active

07107679

ABSTRACT:
A throttle valve and the throttle body are formed substantially simultaneously in the same dies. When a movable die moves away from a fixed die, a body ejector pin, a valve ejector pin, and a motor housing ejector pin simultaneously push a bore wall of the throttle body, a motor housing, and peripheral edge of the throttle the valve in a radial direction respectively. A deformation of the throttle valve can be avoided because a stress concentration on the metal shaft of the throttle valve is reduced in opening the dies.

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