Patent ID: 7213503
Filing Date: 2007-05-08
Classification: B25J,F15B

Abstract:
1. A compressible fluid pressure actuator in which a pressure in a space defined inside is changed by a pressure of a compressible fluid supplied from a pressure source to generate displacement or force accordingly, the compressible fluid pressure actuator comprising: a first tubular expandable member including a first inner space connected to the pressure source; and tubular members including one or more inner spaces connected to the first inner space by way of two or more pressure loss parts with respect to flow of the compressible fluid and each having a volume that does not depend on a pressure of a first inner space, wherein the tubular members include a first tubular member including a second inner space formed in the first tubular member and connected to the first inner space of the first tubular expandable member by way of the pressure loss part and having a volume that does not depend on the pressure of the first inner space; and a second tubular member arranged coaxially within the first tubular member including a third inner space and formed in the second tubular member and connected to the second inner space by way of another pressure loss part and having a volume that does not depend on a pressure of the second inner space.