Abstract: A gas driven pump controls the process fluid pressure within a filtering and dispensing system. A pressure controller in the pump controls gas pressure within an enclosed chamber in the pump. The gas chamber is adjacent a floating piston that rests atop a layer of incompressible fluid in a fluid chamber. The incompressible fluid connects to a diaphragm head. As the gas pressure is increased, the floating piston will transmit that pressure through the incompressible fluid that then forces a relative displacement in the process fluid flow. A feedback system used in conjunction with the gas driven pump controls the gas pressure in order to regulate the process fluid flow.In addition, a positive displacement compensator can be used in conjunction with the gas driven pump in order to further regulate the process flow.

Abstract: A hermetic rotary compressor includes a sealed case, an electrically-driven mechanism installed in the sealed case and a compressing mechanism for compressing the sucked-in refrigerant. The compressing mechanism has a cylinder defining a compression chamber into which an eccentric roller of the electrically-driven mechanism is accommodated. Upper and lower flanges are respectively fixed to upper and lower portions of the cylinder so as to support the rotary shaft and seal the compression chamber. At least one resonance chamber is formed at an inner peripheral surface of a discharge port formed in the upper flange, whereby the resonance chamber communicates with the discharge port. A closure member is provided for opening/closing the resonance chamber. The closure member is biased closed by a spring disposed in a hole formed at the inner peripheral surface of the discharge port of the upper flange, the hole and resonance chamber having a common entrance.

Abstract: A single-piece piston for use in a pneumatically-activated pump or other metering device to meter a predetermined amount of lubricant or other liquid. The piston is disposed within a chamber of the body of the metering device. The piston has a grooved end that includes a head portion and a circumferentially-disposed angled channel for containing a sealing member such as an O-ring. An adjacent stem section includes means for providing a fluid-flow connection with the angled channel. Lateral movement of the piston within the body causes the sealing member to shift and block and unblock the fluid-flow connection means, which allows liquid from a liquid chamber to flow out the head of the piston's grooved end and to an adjacent pump chamber.

Abstract: A roller vane stage (10) for a fuel pump (80) includes an inlet plate (12), an outlet plate (14), and a spacer (16) held therebetween, the spacer having an eccentric inner surface (20) defining a rotor space (18) therein. The roller vane stage (10) further includes a rotor (30) mounted for rotation within the rotor space (18) and the rotor has a plurality of lobes (40), wherein each lobe contains an associated roller (42). Driver slots (44) located in the rotor (30) have a depth less than the thickness (h) of the rotor. Center outlet port (26) in the outlet plate (14) is shaped such that a lobe (40) and its respective roller (42) remains in fluid communication with the center outlet port almost until the lobe begins to communicate with inlet ports (22, 24) in the inlet plate (12).

Abstract: A magnetically coupled pump comprising a housing partitioned into a pump chamber and a motor chamber by a partition wall. An impeller is mounted in the pump chamber. The stator of the motor is mounted in the motor chamber. The rotating shaft of the impeller is received in a recess formed in the partition wall. The rotating shaft is held by a bearing mounted in the recess. An annular permanent magnet is mounted to the side of the body of the impeller which faces the partition wall and arranged about the rotating shaft. An annular sliding contact portion is formed at an end of the bearing and makes a sliding contact with the side of the body of the impeller facing the partition wall. A pair of annular auxiliary sliding contact portions are formed in a part of the rotating shaft and in a part of the bearing, respectively. The auxiliary sliding contact portions start to make a sliding contact with each other when the annular sliding contact portion is worn by a given amount.

Abstract: A single-acting manual pump for feeding lubricant to metering units provided in a lubrication line, of the type comprising a body (10) housing a piston (1) movable within a chamber (2) against the action of elastic means (3), and unidirectional valve means (4) provided in correspondence with at least one entry aperture (5) and at least one exit aperture (6) formed in a portion (2A) of said chamber (2), said means being arranged to enable a predefined quantity of lubricant to enter said portion (2A) of the chamber (2) from a reservoir (7) when the piston is raised, and to enable said quantity of lubricant to leave towards a tubular delivery channel (8A, B, C) when the piston (1) is released to return to its rest position by the action of said elastic means.

Abstract: The invention relates to a unit for conveying fuel from a supply tank to the internal combustion engine of a motor vehicle, having an electric drive motor and a flow pump (11), driven by it, which has a pump housing (16, 21) permanently connected to the unit housing (32) and forming a pump chamber (17), in which housing conveying means (12) moved by the drive motor revolve, wherein an insert (51) of wear-resistant material is disposed on the at least one housing part (16, 21) that defines the pump chamber (17), the insert forming at least part of a chamber wall (18, 19) which defines the pump chamber (17) in the direction of the axis of rotation (15) of the conveying means (12).

Abstract: A pump for a pressure washer. The pump includes a cam housing, a piston assembly disposed within the cam housing, a rotary shaft assembly disposed within the cam housing, a journal plate attached to the cam housing, a head assembly attached to journal plate and valve assembly operatively connected to the head assembly. The rotary shaft assembly includes a cam shaft, a vertically-extending oil tube partially disposed within a central portion of the cam shaft, a cam threaded onto the cam shaft and a thrust washer positioned adjacent the threaded cam. The piston assembly includes a plurality of pistons, preferably three, in mating contact with the thrust washer. Each piston includes a piston spring cap at one end, a spring disposed over the piston and engaging the piston spring cap, and a seal retainer having a low pressure seal at one end and a high pressure seal at the other end.

Abstract: A compressor, particularly suited for use in the motor vehicle air conditioning system, having a compact and simple design. The housing is constructed of a body portion having a first wall area which defines the cavity containing the pumping unit and is designed to withstand the internal cavity pressure. A second wall area, not designed to withstand the internal cavity pressure, cooperates with a housing cover to seal the housing. The second wall area is under tension and is attached to the body by welding or by bending the second wall area. The cover includes a pair of pressure cavities separated by concentric annular sealing bridges. The sealing bridges have axially offset sealing surfaces which cooperate with a valve plate to seal off the two chambers. The sealing surface of the radially outer bridge may be formed of any elastic material. A drive-shaft and swash plate cooperate with a take-up plate to operate one or more pistons. A drive plate, integral with, or attached, as by welding, etc.

Abstract: A vacuum toilet assembly including a vacuum toilet and a vacuum tank (e.g. a combined holding and vacuum tank) uses a simple air pump to remove air from the tank to create a partial vacuum. The air pump is capable of achieving about ten inches mercury of vacuum in an empty 9.5 gallon vacuum tank in roughly one minute, and can pump at least about one liter of liquid per minute. A combined sound muffler and odor filter and/or rat-tail check valve and noise reducer, is/are connected to the outlet from the air pump. The pump comprises a powered reciprocating diaphragm pump having a reciprocating diaphragm powered by an electric motor rotating an eccentric at about 2300 rpm, and oppositely directed first and second disk valves. The disk valves have elastomeric disk valve elements die-cut from flat sheets which cooperate with perforated concave surfaces in a dividing wall in the pump housing. The reciprocating diaphragm has a total stroke length of about 0.3-0.33 inches.

Abstract: A single-piece piston for use in a pneumatically-activated pump to meter a predetermined amount of lubricant or other liquid. The piston has a grooved end that includes a head portion and a circumferentially-disposed angled channel for containing a sealing member such as an O-ring. An adjacent stem section includes a longitudinally-disposed channel that is in fluid-flow connection with the angled channel. The piston is disposed within a chamber of the body of the pump. Lateral movement of the piston within the body causes the sealing member to shift and block and unblock the end of the longitudinal channel which allows liquid from a liquid chamber to flow into a slot and to a pump chamber adjacent to the head of the piston's grooved end.

Abstract: The present invention provides a controller for an air compressor system. The air compressor system includes an air compressor, control unloaders on the air compressor to prevent the air compressor from compressing gases when signaled to unload, an electric motor for driving the air compressor, and a tank for receiving and storing compressed gases from the air compressor. The controller has an adjustable pressure switch to raise or lower the discharge pressure. The differential pressure is pre-set in the pressure switch. The controller includes two methods of operating the air compressor, each of which is manually selected by operating a switch that will designate start/stop control or automatic dual control at the option of the operator. The start/stop control will start the motor when the pressure in the system reaches a predetermined low point. When the preselected high pressure point is reached, a signal is sent to the motor to stop, thereby ending the compressing cycle.

Abstract: A hydraulic engine employs dual cylinders and pistons of different diameter connected end-to-end in collinear alignment. Fluid from a pressurized source drives the large piston to transmit power to a crankshaft. An electromagnetic actuator, controlled by a distributor, opens a control valve, admitting fluid to the large cylinder. A hydraulic actuator closes the control valve, shutting off fluid flow. The hydraulic actuator responds to pressure drop when the large piston uncovers an exhaust port. Fluid drains to a tank, and the cycle repeats. The small piston recirculates fluid from the tank to the source.

Abstract: An improved air inlet cover and impeller for a convertible electric blower/vacuum. The blower/vac includes an electric motor which drives an impeller. A plurality of blades located on the impeller define a frusto-conical surface of revolution. The air inlet cover includes an integral, frusto-conical pressure ring which is located offset but generally congruent to the surface of revolution defined by the impeller blades. The cover additionally includes an air grate that allows the passage of air but prevents the passage of other objects. The grate also includes a choke member for adjusting the effective area of the air inlet into the blower/vac to control the exit air volume and velocity of the blower. The cover also includes a bell-mouthed opening integral with the choke member to increase the efficiency of the blower/vac when in the blower mode.

Abstract: A connection module is disclosed for a submergible pumping system of the type including a submergible electric motor and a pump drivingly coupled to the motor. The system may also include additional components such as a fluid separators, an injection pump, and so forth. The connection module includes a body through which a fluid passage is formed. A recess is formed in the body for receiving a cable for transmitting power to the submergible electric motor. The fluid passage transfers fluid within the pumping system, such as by means of shrouds disposed around the system components. The connection module also includes an electrical connector for completing current carrying paths between a supply cable and the motor. The connection module may thus serve as the motor head in which the electrical connections are made, but through which fluid is channeled to system components.

Abstract: Pump to supply fluid to at least two circuits in a control system for a production well. Each of the circuits is maintained at different pressures. The pump provides fluid to a plurality of poppets that are opened or closed depending on the positions of a cam surface which controls the position of the poppet. A pressure relief valve is used to prohibit fluid from entering a circuit unless the pressure exceeds the pressure of the fluid in the control circuit. The cam surfaces are controlled by a knob rotatable by an operator. By rotating the knob, the poppets can be opened or closed so as to provide fluid sequentially to each of the circuits and pressurize each circuit individually.

Abstract: A pneumatically driven pump includes a piston threadably connected to each end of a common connecting hollow rod which is inserted over a pumped material receiving tube, with this assembly enclosed in a housing. The pistons reciprocate in response to compressed air sequentially directed through different air ports in the housing, alternatively drawing in pumped material and then pumping it out of the pump through the pumped material tube along the center of the pump. A check valve at each of the inflow and outflow ends of the pump prevents back flow of the pumped material.

Abstract: A cam motor apparatus A is configured such that a cylinder block (2) rotating together with an output shaft (10) is internally provided with a plurality of cylinders (5, 5, . . . ) formed radially in a direction orthogonal to a rotational axis (X) of the cylinder block (2) and pistons (6) respectively housed in the cylinders are reciprocated by the action of working oil distributed thereto by a distribution valve (7) thereby rotating the output shaft. The cam motor apparatus A further includes a selector valve (9) for selectively communicating each of the cylinders with a supply passage (81) or a discharge passage (82) for working oil through the distribution valve. When the selector valve is in a low rotational speed position, working oil is supplied to and discharged from all the cylinders.

Abstract: High velocity vacuum pump, such as turbomolecular pump, drag pump, centrifugal pump or the like, comprising a stator (10) and a rotor (18,43,53), which is axially and radially suspended with respect to the stator (10) by magnetic bearings (27). The vacuum pump may comprise two at the same rotor provided, parallelly acting pump portions, each one comprising two pumping steps. The rotor may be cylindrical and rotates around an inner stator shaft and within an outer stator portion. In that way, one pumping step (22) is formed between the inner stator shaft and the rotor and another pumping step (24) between the outer stator portion (10) and the rotor. The magnet bearing comprises at least one rotation symmetric magnet (27) and is disposed to give rise to a rotation symmetric magnetic field which is centered around the rotational axis.

Abstract: A high volume low pressure (hereinafter HVLP) blower having a blower motor with a cooling fan for passing cooling air over the blower motor and a blower turbine connected to and driven by the blower motor for delivering HVLP air to an air outlet. An air intake communicates fresh incoming air to the cooling fan and to the blower turbine. The HVLP blower has a blower housing having mounted therein the blower motor and blower turbine. The blower housing has exhaust vents therein for exhausting cooling air exhaust to the atmosphere. An exhaust plenum within the blower housing prevents mixing of the incoming air with the cooling air exhaust and provides a first passageway for cooling air exhaust to be communicated from the cooling fan to the exhaust vents, such that the exhaust vents direct the cooling air exhaust away from the air intake.