| 摘要 |
<p>Docket 45050-352 HYDRAULIC CYLINDER AND PISTON WITH AUTOMATIC RECIPROCATION VALVE A reciprocation valve for a hydraulically actuated reciprocation motor, wherein the motor has hydraulic inlet and outlet passages into a cylinder through a porting block, and a slidable collar is fitted over the porting block for selectively opening and closing the passages, and a lightweight carriage assembly is attached to the collar and is actuated by a trip rod coupled to a piston within the cylinder.</p> |
