Abstract: A device enables the pumping of any kind of liquid while giving the liquid very high delivery pressure. The units that cause pumped liquid suction and then its delivery are driven exclusively by hydraulic means excluding mechanical means. So that there is no material contact between the driving units and the pumped product and that the product cannot damage the mechanical driving units, the chamber receiving the hydraulic fluid is, at the end of each compression cycle, placed again in direct communication with the hydraulic fluid reservoir.

Abstract: A liquid forced-feed apparatus has a built-in float in a hermetic vessel provided with a working fluid inlet port, a working fluid discharge port, a forced-feed liquid inlet port, and a forced-feed liquid discharge port. A snap mechanism which is actuated to operate the working fluid inlet port and the working fluid discharge port with the upward and downward strokes of the float, to thereby force a liquid in the hermetic vessel out through the forced-feed liquid discharge port. A power transmitting shaft for transmitting the upward-and-downward movement of the float to the snap mechanism extends out of the hermetic vessel. The snap mechanism is disposed outside of the hermetic vessel.

Abstract: A sequential controller is provided for sequencing multiple electric loads such electric pumps. That is, for each cycle the next load is designated as the lead load in a round-robin fashion. The controller uses cost effective electro-mechanical relay logic an thus avoids conventional solid state technology. In order to sequence the loads on each successive cycle, the electro-mechanical relay connected to the sensors comprises a double-throw contact set. The double-throw contact set comprises two complementary contacts, both of which alternate between normally open and normally closed on each successive cycle. In this manner one each successive cycle, the pumps designated as the lead pump and the lag pump automatically alternate in a round-robin fashion. Further, when the lead pump is disabled the lag pump is immediately actuated without disruption of service.

Abstract: An axial plunger slurry pump comprises a pump body, a sloping cam plate, a swashplate, cylinders, plungers and a pump head. Each of the plungers comprises a plunger body with a rubber piston positioned in its front end and being able to slide over it, and an oil receiving gap communicating with an oil passage disposed between two facing end surfaces of the plunger body and the rubber piston. There are check valves each of which is provided in an oil passage between a ball of each of two-ball links, which ball is coupled with the swashplate, and the swashplate. Each of the cylinder and the plunger body are fitted together by means of a half-and-half locating pad, a cylinder sleeve, a pressing cap, and a locking device. The pump may be used widely in drilling, electric power, mine, building, and metallurgy, etc., for conveying mud, mortar, ore pulp, coal pulp, concrete, etc.

Abstract: An oil pump attachment structure is provided for an engine. The oil pump attachment structure includes an oil pump 9 coaxially driven by the crankshaft 2. A pump housing 10 of the pump 9 is disposed between a front cover 7 for covering timing chains 5a, 5b and crank sprockets 3a, 3b while leaving a clearance against the front cover 7. The pump housing 10 is also fastened to a cylinder block 1 so as to straddle the timing chains 5a, 5b, through stays 11a, 11b, 11c by bolts 12. With this arrangement, pulsation produced during the operation of the oil pump 9 is not transmitted to the front cover 7 directly, so that noise radiated from a front face of the front cover 7 can be reduced.

Abstract: In a scroll compressor provided with a fixed scroll member (4) and a movable scroll member (3) which define a plurality of compression spaces (6) therebetween in cooperation with each other, a hole (32) is formed to the fixed scroll member to be communicable with adjacent ones of the compression spaces. The adjacent compression spaces are different from each other in pressure when the scroll compressor is driven. A piston valve (33) is disposed in the hole and controls communication between the adjacent compression space through the hole. The compression spaces are movable with volumes reduced by movement of the movable scroll member.

Abstract: A high-pressure reciprocating pump is constructed such that a plurality of plungers connected to a driver are made to move back and forth and intake channels or discharge channels are opened and closed by valves in synchronism with movements of the plungers for transferring a fluid under high pressure.

Abstract: When a steplike reference signal is supplied while a switch is open, an offset signal for compensating for the dead time of a pneumatic device is generated by an offset generator and supplied as a manipulated variable for the pneumatic device. When a feedback increases in level and a speed higher than a reference speed is detected by a speed detector, the switch is closed by a switching signal, switching from a PD control mode to a PID control mode. The pneumatic device thus controlled has a reduced response time and can made a quick response.

Abstract: In order to reduce the amount of air trapped in hydraulic assisted steering systems (1), a communication (13, 14) is established between the area of the oil expanding volume (8, 10, 11), which is the top area in the mounted position, and an open system (2), for example a tank volume.

Abstract: A variable displacement hydrostatic pump (11) having its displacement varied by a controller (17) in response to movement of a manual control lever (95) from a neutral position (FIG. 1). The vehicle has at least one other device (125,127) which provides an electrical output signal (133) indicating when operation of the pump (11) is "acceptable", in terms of either vehicle performance or operator safety. Associated with the control lever (95) is an input shaft (103) defining at least one stop surface (121,123). A solenoid assembly (109) has a moveable plunger (111), disposed adjacent the stop surfaces, and moveable between a retracted position (FIG. 4a) and an extended position (FIGS. 2 and 4), engaging one of the stop surfaces, when the output signal (133) indicates that operation of the pump is not acceptable.

Abstract: An apparatus for pumping fluids in a wellbore from a subterranean formation. The apparatus includes a tubular housing which is capable of being suspended from its associated upper end in a well bore or hole that communicates with a subterranean formation or oil reservoir. The tubular housing has at least one port or opening where through fluids (e.g. water, oil etc.) pass from the well bore. A pump assembly is contained within the tubular housing such as to be supported thereby. A rotating rod assembly is also contained within the tubular housing and is coupled to the pump assembly for operating the same. A gear assembly is coupled to the rotating rod assembly, and a motor assembly is coupled to the gear assembly while being dependedly attached to the tubular housing. The apparatus additionally includes a filter assembly coupled to the motor assembly.

Abstract: Pressurized fluid motor comprising a casing, a cylinder block, a cam, an internal fluid distributor and a selector. The bore of the selector has four grooves. Two of them are communication grooves each connected to a main (feed or exhaust) power duct and to a connection duct, the connection ducts being themselves connected to different groups of distribution ducts. The other two grooves of the bore are branch grooves respectively connected to an additional (feed or exhaust) power duct and to a third connection duct. The slide of the selector comprises at least a first selection groove which is adapted to establish communication between the two branch grooves. By modifying only the shape of the slide, and possibly that of the bore of the additional duct, the selector can provide different functions.

Abstract: A utility package for installation in the bed of a pickup truck includes a frame (10) having a relatively narrow, lower vertical section (12) of a width W1 narrower than the interior spacing between the sides of the pickup truck bed while substantially spanning the entire interior distance between such sides and a relatively wide, upper horizontal section (14) of a width greater than the interior spacing between the sides and no greater than about the distance between the exteriors of the sides and adapted to be supported on the tops of the sides. An elongated pressure vessel (26) is located within the vertical section (12) and a pair of upright housing sections (64,68) are mounted on the horizontal section (14) oppositely of the vertical section (12). The housing section (64,68) have access openings (78) at respective ends (16,18) of the horizontal section (14).