Solenoid valve device and automatic document feeder having...

Details Solenoid valve device and automatic document feeder having... Solenoid valve device and automatic document feeder having...

2011-03-01

2011-03-01

Bollinger, David H (Department: 3653)

Sheet feeding or delivering

Feeding

Multiple supplies

C271S009050, C271S009130, C335S255000, C335S257000, C335S277000

Reexamination Certificate

active

07896336

ABSTRACT:
A solenoid valve and an automatic document feeder using the solenoid valve are provided. The solenoid valve includes a valve body, a valve spindle, a spring, a ring-shaped groove and muffling ring. The ring-shaped groove is sheathed around the valve spindle. The muffling ring is disposed within the ring-shaped groove. When the valve body is magnetized to magnetically attract the valve spindle, the valve spindle is moved within the valve body, and the muffling ring collides with the recess inner wall, thereby reducing collision noise.

REFERENCES:
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patent: 3400351 (1968-09-01), Flentge
patent: 3609610 (1971-09-01), Flentge
patent: 3890587 (1975-06-01), Field
patent: 4845451 (1989-07-01), Uetsuhara et al.
patent: 5066980 (1991-11-01), Schweizer
patent: 5652560 (1997-07-01), Carter et al.
patent: 6595485 (2003-07-01), Burrola et al.
patent: 6935612 (2005-08-01), McCombs et al.
patent: 7806397 (2010-10-01), Wang et al.

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