Patent ID: 6708778
Filing Date: 2004-03-23
Classification: B25B

Abstract:
A hydraulic unit, comprising:a case having a front closing element and a rear closing element, at least one first blade sealing surface, and at least one second blade sealing surface; a first cam recess having a first depth and provided in each of the front closing element and the rear closing element; a second cam recess having a second depth and provided in each of the front closing element and the rear closing element; a spindle disposed within said case and rotatably supported by the front closing element and the rear closing element; a first blade slidably supported by the spindle and having a first axially extending sealing surface; a second blade slidably supported by the spindle and having a second axially extending sealing surface; a first pair of pins disposed at a front end of the first blade and a front end of the second blade; and a second pair of pins disposed at a rear end of the first blade and a rear end of the second blade; wherein a first pin of the first pair of pins mounts at the front end of the first blade and is received by the first cam recess provided in the front closing element, a second pin of the first pair of pins mounts at the front end of the second blade and is received by the second cam recess provided in the front closing element, a first pin of the second pair of pins mounts at the rear end of the first blade and is received by the first cam recess provided in the rear closing element, and a second pin of the second pair of pins mounts at the rear end of the second blade and is received by the second cam recess provided in the rear closing element.