Abstract: A fluid end assembly comprising a housing having multiple conduits formed therein. A tubular sleeve is installed within one of the conduits and is configured to house a plurality of packing seals. A seal is installed within a groove formed in the walls of the housing surrounding the tubular sleeve such that the seal engages an outer surface of the tubular sleeve.

Abstract: A high pressure pump comprising a fluid end mechanically coupled to a power end. The power end is modular and comprises a crankshaft section, a crosshead section, and a connector section coupled together by a first set of stay rods. The fluid end comprises a plurality of fluid end sections positioned in a side-by-side relationship. Each of the plurality of fluid end sections are attached to the power end using a plurality of second set of stay rods.

Abstract: A quick release fastener comprising a threaded shaft and a split nut arranged to release threads of the shaft when spread open by squeezing. The shaft may be, for example, a screw or a bolt. The nut is longitudinally split into upper and lower mirror image sections such that half of each turn of the threads is contained within a jaw of the upper section and the other half of each turn is contained within a jaw of the lower section. A handle projects from each jaw, enabling the nut to be opened fashion by squeezing the handles together. The fastener is utilized with an appliance bearing a passageway configured to receive the fastener. The passage way is configured such that slight unthreading of the nut allows the jaws to expand, thereby releasing the shaft from the nut. The appliance may be a commode having a toilet seat arranged to be retained by one or more of the novel fasteners.

Abstract: A unidirectional insert lock for securing an insert, with a central mounting hole, to a pocket in a cutting tool is provided. The insert lock includes a locking pin having an eccentric and a radially extending lobe, and a shim having an arcuate channel angularly bordered by a first and second stop, that is configured to receive the lobe. The locking pin is inserted through holes in both the insert and the shim so that when the lobe is rotated in one direction the eccentric urges the insert into a secured cutting position within the pocket. However, when the lobe is rotated in the opposite direction the second stop prevents the pin from sufficiently rotating so that the eccentric is not able to urge the insert against the sides of the pocket, and consequently, the insert sits loosely in the pocket so that it is clear to the operator that the insert is not secured in the cutting position.