Patent ID: 8683911
Filing Date: 2014-04-01
Classification: F15B

Abstract:
1. A linear actuator in which, by introduction of a pressure fluid from fluid inlet/outlet ports, a slide table is made to move reciprocally along an axial direction of a cylinder main body, comprising: the cylinder main body, which communicates with the inlet/outlet ports, and having a cylinder chamber into which the pressure fluid is introduced; the slide table, which moves reciprocally along the axial direction of the cylinder main body; a cylinder mechanism having a piston which is slidable along the cylinder chamber, wherein the slide table is made to move reciprocally under a displacement action of the piston; a guide mechanism for guiding the slide table along the axial direction of the cylinder main body, the guide mechanism being attached to the cylinder main body and having a flat guide block with first circulation passages formed therein through which a plurality of rolling bodies roll and circulate; and circulation members installed in the guide block and each having a second circulation passage therein through which the rolling bodies roll and circulate, wherein openings into which the circulation members are installed are formed in the guide block, wherein the second circulation passages and respective first circulation passages are offset by a predetermined height in a vertical direction.