Abstract: The crosshead has a body formed of solid, metal plate, and of substantially U-shape. It comprises a pair of spaced-apart parallel limbs which are bridged between by an integral transverse member, and the latter is bored through to receive a piston rod therein. Shoe plates are joined to the limbs to guide the body in reciprocation. In the combination with a connecting rod assembly and a piston rod, an end of the piston rod is directly fastened to the connecting rod assembly, and the crosshead is coupled to an intermediate portion of the piston rod.

Abstract: The valve, depicted as of the plate-type, has a ported valve seat, stop plate, and valving element (movable between the plate and seat) biased toward the seat by compression springs. Eight sets of compression springs are employed, in the disclosed embodiment, and each set comprises a pair of helical, counterwound (compression) springs concentrically nested together.

Abstract: In the depicted embodiment, the novel valve assembly comprises a pair of valving plates in which are formed separate, circular, and walled valving chambers. One plate is in surmounting relationship to the others, so that the valving chambers subsist in a plurality of tiers. All the chambers, however, are in given rows which are common to both tiers, and any one chamber, depending upon which tier it is in, either overlies or underlies a portion of another, adjacent chamber in the other tier. Consequently, a great through-flow volume of fluid is accommodated in a considerably compacted, overall valve assembly area. Notwithstanding such an integration of the valving chambers, no one thereof obstructs the fluid flow through any other thereof. Each of the chambers has its own inlet and outlet ports, valving element moveable therewithin, and spring for biasing the valving element in a given direction.

Abstract: In the embodiment shown, the valve has a seat and a stop plate with valving elements therebetween. The seat has pluralities of openings formed therein, and the stop plate has a central void. The valving elements move, to open or close off communication between the openings and the void, in response to pressured fluid. Each element controls fluid flow through a pair of openings. The valve seat has angularly-formed lands with which the elements, correspondingly angularly formed, nest to close off fluid communication through the valve.