Motors: expansible chamber type – With correlated control of motive fluid and locking means – Sequential operation of locking means and motive fluid control
Reexamination Certificate
2005-04-19
2005-04-19
Look, Edward K. (Department: 3745)
Motors: expansible chamber type
With correlated control of motive fluid and locking means
Sequential operation of locking means and motive fluid control
C091S045000, C091S406000
Reexamination Certificate
active
06880446
ABSTRACT:
A lock mechanism of a cylinder includes a lock member for locking or unlocking a piston rod by actions of air pressure and a spring force, a third pressure chamber for causing air pressure to act on the lock member, and a third port. In a pneumatic circuit, a check valve and a throttle valve are connected in parallel in each of first and second pipes connecting first and second ports of the cylinder and a solenoid valve and a check valve and a throttle valve are connected in parallel in a third pipe connecting the third port and the first pipe or the second pipe.
REFERENCES:
patent: 3359862 (1967-12-01), Modrich
patent: 3707629 (1972-12-01), Colston
patent: 4214795 (1980-07-01), Kakuminato
patent: 6308613 (2001-10-01), Takahashi
patent: 6612221 (2003-09-01), Rollgllgårdh
Leslie Michael
Look Edward K.
SMC Corporation
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