Pneumatic cylinder with integral concentric hydraulic cylinder-type axially compact brake
OwnerSumio Sugaharainventor
Life of this patent
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Abstract
A composite hydraulic cylinder apparatus which has a pneumatic cylinder mechanism, a braking oil hydraulic cylinder mechanism associated concentrically with the pneumatic cylinder mechanism, an oil passage for communicating between the front chamber and the rear chamber of the oil hydraulic cylinder mechanism, and a control valve provided in the oil passage for controlling the flow of the oil. Thus, the apparatus provides high positioning accuracy, a large holding force, economy and small size as a movable element control system, and can be applied as a buffer for the movable element.
Claims8
A composite hydraulic cylinder apparatus comprising a pneumatic cylinder mechanism and a braking oil hydraulic cylinder mechanism associated concentrically with the pneumatic cylinder mechanism, wherein sections of a front chamber and a rear chamber of the braking oil hydraulic cylinder mechanism overlap concentrically so as to equalize the volume changes of the chambers, said chambers being communicated through an oil passage with a control valve provided therein to control the flow of the oil.
Dependencies are inferred from the claim text.