Patent attributes
A rod-guided crosshead assembly for use in a pump or similar machine. The assembly includes a crosshead having a rigid body with a pair of parallel passageways passing from the front to the rear of the body. The body also has a rearwardly opening cavity between the parallel passageways for receiving the ring-shaped link of a crank arm. Further, the body has a transverse aperture intersecting the cavity for receiving a pivot pin capable of passing through the ring-shaped link to pivotally connect the crank arm to the crosshead. The body additionally has a connecting rod extending from the front thereof for connecting to a reciprocating machine part. A conduit connects the parallel passageways and places them in fluid communication with one another. A pair of parallel guide rods extends through the parallel passageways. One of the guide rods is hollow so as to define an elongated aperture therein and has a peripheral groove around its exterior surface. A transverse passageway connects the peripheral groove and the elongated aperture. A pressurized oil source is in fluid communication with the elongated aperture so that oil supplied thereto travels to the parallel passageways to lubricate the crosshead as it moves on the guide rods.
