Proserv Operations, Inc. Patent applications |
Patent application number | Title | Published |
20150309515 | DUAL PRESSURE SHUTTLE VALVE - A dual pressure shuttle valve assembly is arranged to operate at two different supply pressures and sequence the flow from the two supplies such that the first lower pressure fluid supply is consumed before the second higher pressure fluid supply is utilized in order to maximize downstream function pressure. The shuttle valve assembly includes a shuttle assembly with opposition portions having different valve seat diameters, and having differently sized apertures. | 10-29-2015 |
20150191996 | MODULAR DIRECTIONAL CONTROL VALVE - A directional control valve includes: a base and a slider longitudinally movable relative to the base. The base includes: a rectangular body having a longitudinal bore, a transverse bore, and a chamber formed at an intersection between the bores; supply and function seal plates, each having a stinger disposed in the transverse bore, one or more receptacles, and a passage extending from each receptacle through the stinger; and a supply, first function, and second function blocks, each fastened to the body and having a stinger disposed in the respective receptacle and a coupling for connection to a flow line. The slider includes: a sliding seal assembly disposed in the chamber; and an operating rod fastened to the seal assembly. | 07-09-2015 |
20150115536 | KEY SEAL AND VALVE - A key seal preferably includes a first circular seal portion, a second rounded seal portion and a third rounded seal portion. The first circular seal portion preferably has generally circular cross-section. The second rounded seal portion preferably has a bottom side which is connected to the first seal portion, and has a cross-section which is smaller than that of the first circular seal portion. The third rounded seal portion preferably has a top side which is connected to the first seal portion, and has a cross-section which is smaller than that of the first circular seal portion. The first, second and third seal portions may be integrally formed. They key seal may be installed in a hydroseal assembly around the pin section of a hydroseal, and between a seal and a block section of the hydroseal. | 04-30-2015 |