Inlet valve for pneumatic tool

Details Inlet valve for pneumatic tool Inlet valve for pneumatic tool

2005-05-31

2008-03-25

Huson, Gregory (Department: 3753)

Valves and valve actuation

Lost motion between actuator and valve

Check valve with external opening and closing means

C251S339000, C137S614160, C137S614180

Reexamination Certificate

active

07347405

ABSTRACT:
An inlet valve is provided for a pneumatic tool. The pneumatic tool defines a space and a passageway communicated with the space. The inlet valve includes a housing and a plunger. The housing is movable in the space between a first position where it blocks the space from the passageway and a second position where it allows the communication between the space and the passageway. The housing defines an inlet and an outlet. The plunger is inserted through the outlet and movable in the pneumatic tool between a first position, a second position and a third position. An end of the plunger is put in the housing for pushing the housing, from inside, to the second position as the plunger is in the third position. The plunger includes an annular flange put in the housing for blocking the outlet as the plunger is in the first position and for opening the outlet as the plunger is in the second position.

REFERENCES:
patent: 2180188 (1939-11-01), Ashworth
patent: 4631012 (1986-12-01), Eckman
patent: 5785228 (1998-07-01), Fa et al.
patent: 5788219 (1998-08-01), Nakajima
patent: 6443239 (2002-09-01), Izumisawa
Taiwan Patent Publication No. 567954, Dec. 21, 2003, 8 pages.

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