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Class Information
Number: 137/384.4
Name: Fluid handling > With lock or seal > Common lock and valve actuator > Combination lock
Description: Devices in which the lock comprises an element which is, or a plurality of elements which are, manually manipulable in a predetermined sequence, or to a predetermined position to effect the operation of the lock.

Patents under this class:

Patent Number Title Of Patent Date Issued
4489748 Lockable apparatus for deactivating a hydraulic system Dec. 25, 1984
4061158 Valve with combination lock and remote control Dec. 6, 1977
4022137 Safe with hydraulic safety protection May. 10, 1977

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