| 20090263225 | INTEGRATED WEDGE LOCK ARRANGEMENT - A hydraulically operated wedge lock system is disclosed to provide a releasable mechanical lock between relatively movable telescoping boom segments. Each wedge lock mechanism includes a backing wedge block connected to a relatively stationary boom segment It defines an angled smooth surface. A stationary shaft is supported generally parallel to the angled surface of the backing wedge block with a stationary piston secured to the shaft at an end. A slidable wedge block is supported for reciprocal movement on the angled surface. It includes a bore having a closed end defining a receptacle between the end and the stationary piston; and, a compression spring is disposed in the receptacle biased to urge the closed end of the bore away from the stationary piston. The end of the bore is closed with a gland to define a chamber with the piston. A port is provided to supply hydraulic fluid to urge the slidable wedge block against the bias of the spring. | 10-22-2009 |
