Patent ID: 6739130
Filing Date: 2004-05-25
Classification: F15B

Abstract:
A linear actuator, comprising:two chambers containing an operating liquid; two mobile elements, one for each of the two chambers, each mobile element delimiting a side of one of the two chambers and being axially mobile along one of two sealed sliding seatings of the chamber, the two mobile elements being connected one to the other so that a movement of one of the mobile elements will determine a movement of the other of the mobile elements; at least one of the mobile elements being designed for connection to an external user; a pump for reversibly flowing the operating liquid from one of the two chambers to the other of the two chambers through an infeed conduit, in order to move the two mobile elements selectively in one direction or in another direction; a recycling conduit which places the two chambers in communication for enabling a closed-circuit circulation to be established when the two mobile elements are stationary and the pump is activated.