A self-aligning mud pump apparatus is provided. In one embodiment, the mud pump includes a rotatable crankshaft, a crosshead, a crosshead guide, and a hub disposed in a housing. The hub is disposed on the crankshaft and is operable to convert rotating motion of the crankshaft to reciprocating motion of the crosshead within the crosshead guide. The hub is coupled to the crosshead via a connecting rod, which is connected the crosshead such that the connecting rod has five degrees of freedom with respect to the crosshead guide. The mud pump may also or instead include a piston coupled to the crosshead with five degrees of freedom between the piston and the crosshead. Additional systems, devices, and methods are also disclosed.

A linear drive assembly configured for use within a power end assembly. The linear drive assembly is configured to interconnect a crankshaft and a pony rod and comprises a crosshead assembly attached to a connecting rod assembly. In one or more embodiments disclosed herein, the connecting rod assembly is configured to attach to opposite sides of the crosshead assembly so that no portion of the connecting rod assembly is disposed within an interior of a crosshead included in the crosshead assembly.

A linear drive assembly configured for use within a power end assembly. The linear drive assembly is configured to interconnect a crankshaft and a pony rod and comprises a crosshead assembly attached to a connecting rod assembly. In one or more embodiments disclosed herein, the connecting rod assembly is configured to attach to opposite sides of the crosshead assembly so that no portion of the connecting rod assembly is disposed within an interior of a crosshead included in the crosshead assembly.

The invention relates to an assembly of an ORC engine with a crosshead for the articulated connection of a piston rod of a piston, which is guided in a working cylinder, to a connecting rod of the ORC engine, wherein the crosshead is movable in a guide in the longitudinal direction of the piston rod. The crosshead can be detached from the connecting rod in the direction of the working cylinder without complete or partial dismounting of the guide. By means of the guide, free space can be left for the dismounting of the crosshead with axial displacement of a connecting-rod pin, and/or the crosshead can be broken down into parts for dismounting purposes.

The invention relates to an assembly of an ORC engine with a crosshead for the articulated connection of a piston rod of a piston, which is guided in a working cylinder, to a connecting rod of the ORC engine, wherein the crosshead is movable in a guide in the longitudinal direction of the piston rod. The crosshead can be detached from the connecting rod in the direction of the working cylinder without complete or partial dismounting of the guide. By means of the guide, free space can be left for the dismounting of the crosshead with axial displacement of a connecting-rod pin, and/or the crosshead can be broken down into parts for dismounting purposes.

Internal combustion engines that operate in an inverted orientation in which the piston is closer to the local gravitationally dominant terrestrial body's center of gravity at top dead center position than at bottom dead center position are disclosed. The engines may have non-circular, preferably rectangular, cross-section pistons and cylinders, and the pistons may include a skirt with a field of pockets that provide a ringless, non-lubricated, seal equivalent. The pistons also may have a domed piston head with depressions thereon to facilitate the movement of air/charge in the cylinder. The engines also may use multi-stage poppet valves in lieu of conventional poppet valves, and a split crankshaft. The engines may use the pumping motion of the engine piston to supercharge the cylinder with air/charge.

Internal combustion engines that operate in an inverted orientation in which the piston is closer to the local gravitationally dominant terrestrial body's center of gravity at top dead center position than at bottom dead center position are disclosed. The engines may have non-circular, preferably rectangular, cross-section pistons and cylinders, and the pistons may include a skirt with a field of pockets that provide a ringless, non-lubricated, seal equivalent. The pistons also may have a domed piston head with depressions thereon to facilitate the movement of air/charge in the cylinder. The engines also may use multi-stage poppet valves in lieu of conventional poppet valves, and a split crankshaft. The engines may use the pumping motion of the engine piston to supercharge the cylinder with air/charge.

A positive displacement injector pump for use in the oil and gas industry includes friction reducing roller bearing and head assemblies. The roller bearing assembly is provided to reduce friction in the operation of one or more fluid delivery injector heads and utilizes a motor driving a crosshead and power hub. The power hub has a hub cam follower roller bearing with at least three peripheral perpendicular mounted rolling bearings. A cross head communicates with the hub cam follower roller bearing and is adapted to reciprocate the head assembly to drive the plunger of the injector pump with a guide rod.

A positive displacement injector pump for use in the oil and gas industry includes friction reducing roller bearing and head assemblies. The roller bearing assembly is provided to reduce friction in the operation of one or more fluid delivery injector heads and utilizes a motor driving a crosshead and power hub. The power hub has a hub cam follower roller bearing with at least three peripheral perpendicular mounted rolling bearings. A cross head communicates with the hub cam follower roller bearing and is adapted to reciprocate the head assembly to drive the plunger of the injector pump with a guide rod.

An actuation system includes a linear actuator extends longitudinally along an actuation axis. A first link extends along a first centerline parallel to the actuation axis, where first link is on a first side of the linear actuator. A second link extends along a second centerline parallel to the actuation axis, where the second link is on a second side of the linear actuator. The first and the second links are configured to transfer a load along the first and the second centerlines between the component and the linear actuator.