Electronically controlled throttle apparatus

Details Electronically controlled throttle apparatus Electronically controlled throttle apparatus

2005-03-08

2005-03-08

Bastianelli, John (Department: 3751)

Valves and valve actuation

Rotary valves

Butterfly

C251S337000, C251S355000

Reexamination Certificate

active

06863259

ABSTRACT:
In an electronically controlled throttle apparatus, a coil spring is shaped to extend from a U-shaped hook portion which is a joint between a first spring portion having a returning function and a second spring portion having an opening function to the other end of the second spring portion. A coating of a lubricant is provided on a sliding contact area between the inside circumferential surface of the coil spring and the outside circumferential surface of the second spring inside circumferential guide. Thus, the sliding resistance in relative motion between the coil spring and the second spring inside circumferential guide can be significantly reduced.

REFERENCES:
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patent: 4625943 (1986-12-01), Groger
patent: 4873957 (1989-10-01), Ueyama et al.
patent: 4880207 (1989-11-01), Matsumoto et al.
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patent: 5509396 (1996-04-01), Tamaki
patent: 5685521 (1997-11-01), Yoshida et al.
patent: 5762044 (1998-06-01), Hollister et al.
patent: 6173939 (2001-01-01), Dottavio et al.
patent: 20020078923 (2002-06-01), Torii
patent: 3-50350 (1991-03-01), None

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