| 摘要 |
Structure for locking a cylinder piston or the like in one limiting position thereof including a housing, a wedge member secured to the piston for reciprocation therewith mounted within the housing and having a cam surface thereon, and a locking piston positioned within the housing for reciprocal movement transversely of the wedge member also having a cam surface thereon engageable with the cam surface of the wedge member in one position thereof to secure the cylinder piston in the one limiting position. The camming surfaces have a surface area and a locking angle with respect to the cylinder piston to provide improved locking force on the cylinder piston and prevent backup of the cylinder piston on pressure drop or failure to the locking piston.
|
