Hydraulic apparatus for actuating a punch for a clutch facing machine
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United States of America Patent
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-
Jul 7, 1998
Grant Date -
N/A
app pub date -
Mar 20, 1996
filing date -
Mar 20, 1996
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A rotary drive unit powers a double-acting cam and a Geneva drive. The cam actuates two double-acting pumps which supply pressurized hydraulic fluid to a double-acting motor. A punch is reciprocated by the motor to punch sectors from a sheet material. The Geneva drive rotates a carrier which is indexed to receive material punched from the sheet. The hydraulic fluid is maintained in the system by a pair of check valves which deliver fluid as required from a pressurized reservoir to the pumps during a low pressure portion of the pumping cycle. Also provided are bleed and fill valves and pressure relieve valves which further assist in filling the system and controlling the maximum system pressure.
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