Valves and valve actuation – Reciprocating valve – Push or pull operator
Reexamination Certificate
2011-01-04
2011-01-04
Bastianelli, John (Department: 3753)
Valves and valve actuation
Reciprocating valve
Push or pull operator
C251S324000, C251S900000
Reexamination Certificate
active
07862006
ABSTRACT:
An air intake valve apparatus for pneumatic tool, configured in an intake port of a pneumatic tool for controlling air circulations, mainly comprises a valve base configured in the intake port of the pneumatic tool, a stem configured through the valve base inside capable of shifting to a air-blocking position and a air-exhausting corresponding to the valve base and a flexible component propped the stem for keeping the stem on the air-blocking position regularly, wherein the stem has a first portion, a second portion and a mid-reducing portion, the mid-reducing portion is coupled to the first portion and the second portion respectively with different transiting surfaces so as to maintain the force driving the stem in constant no matter the air pressure entering the valve base is lower or higher.
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Bastianelli John
Keymore International Co. Ltd.
Schmeiser Olsen & Watts LLP
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