Valves and valve actuation – Serial alternately closed ports
Reexamination Certificate
2006-05-30
2006-05-30
Jacyna, J. Casimer (Department: 3751)
Valves and valve actuation
Serial alternately closed ports
C251S318000, C173S017000, C173S206000
Reexamination Certificate
active
07051995
ABSTRACT:
A pressure-fluid driven device for generating a reciprocating movement includes a first (5) and a second relatively movable part (3), wherein a working chamber (7) is intended to be alternatively pressurised and depressurised so as to drive the parts in a movement relative to each other when the working chamber is pressurised. A valve arrangement (8) is intended to control the fluid flow into as well as from the working chamber. The inlet into the working chamber (7) is separate from the discharge from the working chamber (7). The invention also concerns a valve arrangement and a pneumatic tool.
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Guerra David
Jacyna J. Casimer
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