| 摘要 |
<p>A hydraulic power transmission apparatus (22) having valving (20) for regulating the flow of hydraulic material between a pair of cylinders (28, 30) in either of two opposite directions. The valve has a circularly cylindrical occluding member (60) disposed in occluding position within the hydraulic material pathway (48) connecting the two cylinders to separate the pathway into separate first and second sides. The occluding member (60) seats loosely within a plurality of arcuate seating surfaces (62, 64, 66) and is displaceable upon change in direction of flow of the hydraulic material, under the influence of the hydraulic material, from a first position in abutment with a first plurality of seating surfaces (62, 66) to a second position in abutment with a second plurality of abutment surfaces (64, 66). The occluding member is freely rotatable about its longitudinal axis within the seating surfaces and has at least one slot (68) formed therein.</p> |
