Sequencing valve mechanism

Details Sequencing valve mechanism Sequencing valve mechanism

F - Mech Eng,Light,Heat,Weapons

16

K

137/111

F16K 31/44 (2006.01) A61H 23/04 (2006.01)

Patent

CA 1193173

ABSTRACT OF THE DISCLOSURE A sequencing valve mechanism utilized to control a pneumatic or hydraulic pressure medium from an on/off type pressure source to a two-chambered pneumatic or hydraulic appliance is disclosed. A pawl on a ratchet arm is driven around a ratchet island by the alternate application and withdrawal of pressure to the sequencing device. The ratchet arm is pivotally attached to a valve control arm which regulates a valve so as to control the output of a pressure source. The shapes of the ratchet island portions are such that two alternate applications and withdrawals of pressure are required for the pawl to complete one cycle about the island and, thereby, actuate the valve to different output positions only on alternate applications of pressure to the sequencing device.

409173

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