Abstract: A coolant pump for a coolant circuit of an internal combustion engine, including a drive wheel which is connected to an impeller via a drive shaft rotatably mounted in a pump housing has at least one coolant outlet provided radially with respect to the impeller. A blocking ring is movable in an axial direction and serves to change or block a cross-sectional area of the coolant outlet and is displaced by a pressure-medium-operated actuator. The actuator is arranged concentrically with the drive shaft in the region of the end thereof facing the impeller is secured on the end of the drive shaft, and is connected to a pressure medium supply via at least one longitudinal bore provided in the drive shaft.

Abstract: A reciprocating pump assembly including a first fluid assembly; a second fluid assembly; and, a power assembly operable by a prime mover. A prime mover including one of an engine and a motor. The power assembly interposed between and shared by the first fluid assembly and the second fluid assembly. The power assembly including at least one rotatable crankshaft operating the first and second fluid assemblies. Also included is a method of pumping fluid for a downhole operation.

Abstract: A fuel pump uses an expanding spring to pressurize liquid fuel and cause it to flow through a pump outlet port. A cam and cam follower cause a piston to move in a direction opposite to the pumping stroke in order to transfer fluid from a first chamber to a second chamber within the body of the pump. During the spring actuated pumping stroke, liquid fuel is drawn from a fuel reservoir into the first chamber of the pump for later transfer to the second chamber during the return stroke caused by the cam mechanism. A flexible shaft connects the cam to mechanism to a source of motive power to allow the pump to be displaced from the source of motive power and away from certain potential sources of heat.

Abstract: A portable fluid pump including a frame; a first fuel reservoir having a first upper boundary; a second fuel reservoir having a second upper boundary; an engine disposed laterally between the first and second fuel reservoirs; and a pump disposed laterally between the first and second reservoirs. The pump includes an intake pipe having a central axis; the central axis passing through a first point that is located less than two inches above the first upper boundary.

Abstract: A high-performance oil pump for pumping oil in an internal combustion engine that eliminates or greatly reduces cavitation in the oil pump, thereby increasing the efficiency and performance of the oil pump. The present invention provides a housing having an inlet for receiving a supply of oil and an outlet for discharging the oil. At least two gears rotatably and matingly are disposed within the housing for pumping the oil from the inlet to the outlet. A pressure regulation circuit is disposed within the housing for balancing oil flow pressure between the inlet and the outlet by redirecting a portion of the oil from the outlet to the inlet when said oil flow pressure reaches a predetermined level at the outlet in order to reduce or eliminate cavitation of oil in the oil pump.

Abstract: A torque converter having an impeller, a turbine, and a stator disposed between the impeller and the turbine is provided. The torque converter has an axially thin design, with a torus width to torque converter diameter ratio of about 0.15 to 0.17, by way of example. In some variations, the stator has twisted blades that have lower shell blade angles than core blade angles with respect to the center line of torque converter flow, at both the inlet and outlet.

Abstract: A high pressure fuel pump with improved lubrication characteristics includes a plunger configured to pressurize fuel supplied to a high pressure chamber formed within a housing at a high pressure to discharge the fuel while being lifted and dropped in the high pressure chamber within the housing, a tappet body configured to support a lower end of the plunger, a cam configured to lift and drop the plunger while rotating, and a roller configured to be installed in a roller shoe pressed in a lower portion of the tappet body and rotate in a state of being in contact with the cam, the fuel supplied to the high pressure chamber passes the roller shoe through at least one lubrication passage and is supplied to a contact area between the roller and the cam or a contact area between the roller shoe and the roller.

Abstract: In accordance with various embodiments of the present invention, a system and method are provided for converting a conventional automobile engine into a gas compressor. In various embodiments, the system and method may provide an economical and efficient gas compressor by modification of a balance-opposed internal-combustion engine to provide a balance-opposed gas compressor. More specifically, in some embodiments, the modification may include a uniquely designed cylinder head adapted to convert an automobile engine into a gas compressor for the recovery, gathering, transfer, or staged compression of natural gas. In one embodiment, a four-cylinder balance-opposed engine is utilized.

Abstract: Method for determining the temperature of a fluid in a hydraulic arrangement for a motor vehicle. The hydraulic arrangement has a pump arrangement, which is driven by means of a drive motor, and a pressure sensor, which is connected to a discharge port of the pump arrangement and is used to measure the pressure of the fluid. The pump arrangement is connected to a tank via a leakage point. The temperature of the fluid is determined on the basis of a relationship between a state variable of the drive motor and the temperature of the fluid at a predetermined pressure of the fluid, said relationship being specific to the hydraulic arrangement.

Abstract: A control apparatus for an automatic transmission mechanism including a continuously variable transmission having a drive pulley, a driven pulley, and a belt extending around the two pulleys. When beginning of the start of a drive source for driving a vehicle has been detected, a first command oil pressure as a command value of a first control oil pressure supplied to a cylinder chamber of the drive pulley is set to a first predetermined oil pressure substantially equal to 0, and a second command oil pressure as a command value of a second control pressure supplied to a cylinder chamber of the driven pulley is set to a second predetermined oil pressure higher than the first predetermined oil pressure. When the detected second control oil pressure has reached a predetermined threshold value, it is determined that filling of the cylinder chamber of the driven pulley has been completed.

Abstract: A bulldozer is provided with an engine, a pump assembly, an engine auxiliary, and a connecting member. The engine has an output axis which extends in a front and back direction of the bulldozer. The pump assembly includes a plurality of hydraulic pumps. The plurality of hydraulic pumps are disposed behind the engine and are disposed to line up with each other in the front and back direction. The pump assembly is connected to the engine. The engine auxiliary is disposed behind the engine and is mounted to the engine. The connecting member connects the engine and the engine auxiliary.

Abstract: Ultra efficient hydraulic hybrid drivetrain of vehicle with a single cylinder module of engine, air compressor, hydraulic pump and motor transmit power without crankshaft, pipes and hoses. The engine piston fastened to pump plunger located within rotor comprised two diametrically opposite axial rods associated with the plunger, compressor piston and swash plate. This plate turn and independently shift by digital control changes the engine piston stroke, changes the engine compression ratio for super efficient homogeneous charge compression ignition and either kind of fuel use. The hybrid by hydraulic accumulator provides start, idling and work mode of operation. Compressor's piston diameter greater than engine piston diameter and plunger pumping fluid and simultaneously driving additional plungers enables to provide more than 130 hp per liter engine displacement. Such unique features and energy recuperation enables to achieve 80 mile per gallon for the 1500 kg weight medium car in city conditions.

Abstract: A lubricant pump for pumping a pressurized lubricant to an engine includes a shiftable control ring, a pump rotor, a pump outlet port, a pressure control system and a preload control arrangement. The pressure control system comprises a first pressure control chamber, a first pressure conduit connecting the pump outlet port with the first pressure control chamber, and a pressure control valve. The pressure control valve comprises an outlet port, a control valve cylinder wall comprising a control port connected with the outlet port, a control plunger which opens and closes the control port, an input pressure plunger connected with the control plunger, and a control spring preloading the control plunger into a closed position. The preload control arrangement comprises a preload cylinder, a preload plunger in the preload cylinder supporting a basis of the control spring, a preload cylinder inlet, and a preload control valve controlling a lubricant pressure.

Abstract: A hydrostatic drive system for a vehicle (10) comprises an open circuit (100), a closed travel circuit (120), an electronic controller (320), and a main variable displacement hydraulic pump (102) driven by an internal combustion engine (12) equipped with a speed sensor (350). The main variable displacement hydraulic pump may be configured to supply hydraulic fluid to a hydraulic consumer (34, 44, 50) via a hydraulic supply line (106). A pressure relief valve (118) may be connected to a reservoir (300) and may be permanently connected to the hydraulic supply line of the open circuit. The electronic controller may be configured to run a strong braking mode in which the electronic controller at least partially increases the displacement of the main variable displacement hydraulic pump such that hydraulic fluid is discharged via the permanently connected pressure relief valve into the reservoir if the sensed engine speed is higher than a predetermined maximum engine speed.

Abstract: A system for dampening vibration in a pump includes a PTO-driven pump having a prime-mover side and a pump-side. The system includes a bulkhead interposed between the prime-mover side and the pump-side, the bulkhead having an opening therein. The system includes a vibration dampening plate having a thickness of at least 12 mm, where the vibration dampening plate is positioned between a bulkhead and a pump-side bearing flange or a prime-mover side bearing flange. The pump-side bearing flange or a prime-mover side bearing flange is coupled to the bulkhead at the opening therein. The system includes a bearing shaft extending through the opening in the bulkhead, the vibration dampening plate, the pump-side bearing flange, and the prime-mover side bearing flange.

Abstract: A vacuum pump (10) suitable for mounting at a lower region of an engine such as in the oil sump of an engine. The vacuum pump (10) includes a casing (12) having a cavity (14) containing a movable member (18), wherein the cavity (14) is provided with an inlet (32) and an outlet (34) and the movable member (18) is movable to draw fluid into the cavity (14) through the inlet (32) and out of the cavity (14) through the outlet (34) so as to induce a reduction in pressure at the inlet. The vacuum pump (10) is further provided with an oil feed conduit (84) to supply oil to the cavity (14), the oil feed conduit (84) being provided with a valve (86) to prevent the flow of oil to the cavity (14) during periods when the pump is not operating.

Abstract: A vehicle has a drive shaft which transmits torque onto a first drive, a clutch compressor, and a power steering pump. The power steering pump is driven by an output shaft which transmits torque from the first drive onto the power steering pump. A method is provided for controlling the power steering pump and the clutch compressor in the vehicle. An additional output shaft is provided for driving the clutch compressor. The additional output shaft is arranged on a second drive onto which torque is transmitted by the drive shaft which is driven by the engine. The additional output shaft transmits torque from the second drive onto the clutch compressor.

Abstract: The invention herein described consists of a single-cylinder free-piston engine system comprising a combustion cylinder, a compression cylinder, a seal between the two cylinders and a piston assembly, capable of being produced in a miniature scale (e.g., less than 10 cubic centimeters volume). The combustion cylinder consists of a holding chamber wherein fuel enters through a fuel inlet port before combustion, a combustion chamber wherein combustion occurs according to an HCCI process, after which the excess fuel and exhaust leaves the engine system through a port for exhaust, and a port extending from the holding chamber to the combustion chamber. The compression cylinder comprises a compression chamber wherein a compressible a compressible fluid enters through an inlet port, is compressed by the single-cylinder engine system, and the compressed fluid exits through an outlet port, and a rebound chamber wherein energy from the combustion process is conserved by a rebound element.

Abstract: An oil circulation system for electric motors in a hybrid electric vehicle having, as a power source, an internal combustion engine is disclosed. Provision is made to start oil circulation under high reliability even though an electric pump cannot circulate lubricant oil through the electric motors due to increased viscosity at low temperatures. The oil circulation system includes the electric pump in fluid communication with an oil flow path for the electric motors; a mechanical pump, in fluid communication with the oil flow path, operable on driving power of the engine; and a controller for control of operation of the electric pump and that of the mechanical pump. The controller utilizes operation of the mechanical pump upon detection of abnormality in operation of the electric pump derived from viscosity of the lubricant oil in order to recover the electric pump.

Abstract: An auxiliary power system that is coupled a truck is described. The auxiliary power system pumps a fluid material housed by a truck hydraulic tank and bypasses the truck engine to affect a pump that offload the fluid material. The auxiliary power system includes a housing, an auxiliary engine, a pump, a suction line, a pressure line, and an offload control module. A method for configuring an auxiliary power system to bypass a truck engine is also described. The method includes controlling a pump that is operatively coupled to an auxiliary engine with an offload control module, in which the pump is powered by the auxiliary engine.

Abstract: Systems and methods of the invention relate to removing fluid from a compressor to mitigate condensation accumulated for a compressor. A controller can be configured to actuate a drain valve coupled to an aftercooler of a compressor and actuate a check valve to isolate air pressure of the aftercooler from a reservoir of the compressor. Through control of the drain valve of the aftercooler and the check valve, the controller removes fluid from the aftercooler to facitliate thermal management of a compressor.

Abstract: A hydraulic drive system for a track device of crawler type has right and left hydraulic track motors. The hydraulic drive system is capable of correcting for skew occurring in the straight line traveling of the track device. A traveling test is conducted upon shipment from a factory. If skew is noted during the test, a plug disposed on the side of a valve opening-side pressure receiving portion of a pressure compensating valve for the track which is lower in speed is removed and, replaced with an adjusting mechanism-mounted plug having an adjusting pin. The pin is operated so as to strengthen a biasing force of a target compensating differential pressure adjusting spring. An opening in the pressure compensating valve is thereby corrected in an opening direction and a flow rate to one of the left and right track motors is thereby adjusted to be equal to the other motor.

Abstract: A hydraulic circuit architecture for a work vehicle includes a pump, a work circuit, a propel circuit, and a circuit selector. The work circuit is connected to an actuator for driving a work component of the work vehicle. The propel circuit includes a motor that is adapted to be connected to a drive train of the work vehicle. The propel circuit also includes an accumulator. The circuit selector selectively connects the pump to the work circuit and the propel circuit. The hydraulic circuit architecture is operable in a first mode and a second mode. In the first mode, the propel circuit is connected to the pump and the work circuit is disconnected from the pump. In the second mode, the work circuit is connected to the pump and the propel circuit is disconnected from the pump. When the hydraulic circuit architecture is in the second mode, stored energy from the accumulator can be used to drive the motor to cause propulsion of the work vehicle.

Abstract: An air compression apparatus includes an air tank, an air compressor, and a governor. The air compressor delivers compressed air to the air tank by using power of an engine at the time of load running and stops the delivery of the compressed air to the air tank at the time of no-load running. The governor switches between the load running and the no-load running of the air compressor. Furthermore, the governor changes, when an engine speed is equal to or more than a threshold value, switchover timing for switching the air compressor from the no-load running to the load running in comparison with a time when the engine speed is less than the threshold value.

Abstract: A fluid motor under variable pressure, wherein variation of pressure is generated by combustion of a combustible, after said process the liquid flow of the motor returns to its place activated by pressurization of a compressed gas that is within a cavity that encompasses the combustion chamber almost totally. This liquid flow energy in movement is collected by a turbine that is located within said motor.

Abstract: A hydraulic fan drive for a cooling system of an internal combustion engine, in particular a diesel engine of a mobile working machine or a construction machine, is configured to be switched off for a short time or by way of a transition in dependence on a load of the internal combustion engine. A shut-off valve, which is arranged in a working line connecting a variable-displacement pump to a fan motor, is configured to switch off the fan drive. The fan drive is further configured to be switched off by rotational speed monitoring of the internal combustion engine.

Abstract: An adjusting valve adjusting valve for adjusting the delivery volume of a displacement pump includes a valve casing, a valve piston which is mounted such that the valve piston can be moved within the valve casing, a valve spring which counteracts a force exerted by the valve-actuating pressure on the valve piston, and an adjusting device serving to adjust the valve piston in the direction of or counter to the force exerted by the valve-actuating pressure. A displacement pump exhibiting an adjustable delivery volume, includes a pump casing, a delivery chamber formed in the pump casing and a delivery member and the adjusting valve for adjusting the delivery volume, arranged in a flow of the fluid delivered by the delivery member.

Abstract: An oil pressure control apparatus includes a control valve mechanism being in communication with a pump via a first fluid passage and being in communication with a control apparatus via a second fluid passage, a third fluid passage diverging from the first fluid passage to supply oil to a predetermined portion other than the control apparatus, and a fluid passage dimension regulating mechanism including a movable member provided at the third fluid passage and including an opening for regulating a fluid passage dimension of the third fluid passage. The fluid passage dimension regulating mechanism is in communication with a fourth fluid passage diverging from the second fluid passage and biases the movable member to a side increasing the fluid passage dimension by applying the hydraulic pressure of the fourth fluid passage to the movable member separately from the hydraulic pressure of the third fluid passage.

Abstract: An air-cooled general-purpose engine includes: a cooling fan fixed to one end portion, protruding outward from one end wall of an engine main body, of a crankshaft; and a shroud which is mounted to the engine main body, and which defines a cooling-air path between the shroud and the one end wall, the cooling-air path guiding a cooling air blown under pressure from the cooling fan. The air-cooled general-purpose engine includes: an oil pump which pumps up an oil from an oil reservoir; and an oil-supply path which is formed in the one end wall, facing the cooling-air path, of the engine main body, and configured to guide the oil discharged from the oil pump to a valve operating chamber in a head portion of the engine main body, and a jet for jetting the oil is provided in an opening of the oil-supply path, the opening being open to the valve operating chamber.

Abstract: A hybrid drive system for a utility vehicle (1) which operates with an internal combustion engine (12) and an electrical generator (80), motor (86) and storage means (84). Auxiliary hydraulic functions (93,94) may be powered by the electric motor (86). An output of the engine (12) is mechanically coupled to a multi-ratio transmission (10) which has a hydrostatic driveline (24) and an output which is mechanically coupled to propulsion means. With the engine switched off, the electric motor powers a hydraulic pump (91) which generates pressurised fluid to operate auxiliary functions. In addition, the pressurised fluid may be exploited in a secondary propulsion mode to drive a hydraulic motor (92) in the hydrostatic transmission to propel the vehicle in a low emission, low noise output mode.

Abstract: A fuel pump module including a reservoir and a sender gauge. The reservoir includes an outer wall, an inner wall spaced radially inward from the outer wall, a floor connecting the inner and outer walls, and N sets of supports fixed to the floor and disposed between the inner and outer walls and around the inner wall. The sender gauge is supported and retained by one of the N sets of supports, wherein N is an integer greater than one.

Abstract: A hydraulic powertrain system is disclosed, in which one possible embodiment provides at least one combustion cylinder, at least one cylinder head, at least one piston. During combustion, pressure moves the piston downwards, where it creates motion in an attached hydraulic cylinder. Fluid in the hydraulic cylinder is then pressurized, where it exits the hydraulic cylinder and is directed to a fluid turbine, where work is extracted from the pressurized fluid.

Abstract: A camshaft assembly may include a shaft and a mechanical vacuum pump. The shaft may define first and second ends and include first and second lobes and first and second bearing support structures distributed between the first and second end. The shaft may define a first vane opening. The mechanical pump may be coupled to the shaft between the first and second ends. The mechanical vacuum pump may include a cover, a housing coupled to the cover to define a cavity therebetween and a vane. The cover may define a cover opening that rotatably receives the shaft. The housing may define a housing opening that rotatably receives the shaft. The vane may be arranged within the cavity and slidably received within the first vane opening such that the vane rotates with the shaft.

Abstract: An integrated compressor and pump unit suitable for installation on a vehicle and draw rotary power from a power source of the vehicle. The unit includes a compressor unit and a separate pump unit. The compressor unit has a rotary input shaft coupled to a rotary compressing device of the compressor unit. The pump unit is mounted to the compressor unit and has a rotary input shaft coupled to a rotary pumping device of the pump unit. The pump unit is secured to the compressor unit and rotary motion is transferred from the rotary input shaft of the compressor unit to the rotary input shaft of the pump unit such that the rotary compressing and rotary pumping devices operate in unison and in series.

Abstract: An oil pump assembly for use with an internal combustion engine having an engine block, a crankshaft that is rotatable with respect to the engine block on a crankshaft axis, and a sump that is connected to the engine block for receiving and storing oil therein. The oil pump assembly includes a housing and a drive assembly that is arranged on the housing. The drive assembly is connected to the crankshaft for rotation in unison therewith. An oil pump is connected to the housing for pumping oil between an inlet and an outlet of the oil pump in response to rotation of a drive shaft. The drive shaft is connected to the drive assembly for rotation in unison therewith.

Abstract: A compression pump for an engine is provided. The pump may include a first impeller operatively coupled to a main shaft of the engine, a first inlet configured to at least partially receive bypass airflow, and a first outlet configured to direct compressed air to a thermal management system.

Abstract: A pressure washer system includes an internal combustion engine and a water pump. The internal combustion engine includes an engine block forming a chamber and a cover for the chamber. The cover has an area designed to hold a lubricant. Additionally, the engine includes a crankshaft within the chamber. The water pump includes a pumping mechanism, an inlet, an outlet, and a fluid passage. The pumping mechanism is powered by the crankshaft. Water enters the pump through the inlet and exits the pump through the outlet. The fluid passage extends between the inlet and the outlet. A portion of the fluid passage is formed in the cover of the engine. Heat transfers from the lubricant of the engine to the water of the water pump during operation of the pressure washer system.

Abstract: A retainer extends across first and second overlapping hinged beams to retain the hinged beams against pivotal movement.

Abstract: A portable hand held controllable and directable liquid pumping device including a vortex pump head (1) fitted to a first end (2) of an elongate flexible drive shaft (3) and a pump drive (4) fitted to a second end (5) of the flexible drive shaft in which the pump drive includes a substantially rigid elongate housing (6) for a portion of the drive shaft and the elongate housing includes a first handle (7) at or near the first end (8) remote from the pump drive.

Abstract: An improved fire pump for a firefighting vehicle is provided. The fire pump is capable of being positioned at least partially under a rear portion of the cab of a firefighting vehicle. The pump includes a shaft, an impeller supported by the shaft, and a pump housing which encloses the impeller and supports the shaft for rotation about an axis. The housing includes a fluid inlet configured to direct a fluid into the housing along a path generally parallel to the axis. The housing also includes two fluid outlets each at a periphery of the impeller and configured to direct the fluid from the housing along respective paths generally perpendicular to the axis.

Abstract: A compressor drive system for driving a compressor of an internal combustion engine contains a variable speed drive unit and a planetary gear set, the planetary gear set being connected to the internal combustion engine and the compressor in such a way that a first output shaft of the planetary gear set is connected to the compressor, a first drive shaft of the planetary gear set is connected to the internal combustion engine, and a second drive shaft of the planetary gear set is connected to the internal combustion engine through the variable speed drive unit.

Abstract: A pressure washer system includes an engine block, a water conduit, a water pump, and a spray gun. The engine block is for a horizontally-shafted internal combustion engine, and has a chamber therein. The chamber is designed to contain oil for cooling and lubricating the internal combustion engine. The water conduit has a garden hose connector on an end thereof, and is fastened to the engine block. As such, heat transfers from the engine block to a flow of water passing through the water conduit during operation of the internal combustion engine. The water pump is coupled to the water conduit, where the flow of water is driven by the water pump. The spray gun is coupled to the water pump, where the flow of water exits the pressure washer system via the spray gun.

Abstract: A water pump is constructed to have a rotating member that is adapted to be rotated by an external driving source, a housing that forms a part of a pump chamber from which a cooling water is led to an internal combustion chamber for cooling the engine upon rotation of the rotating member, a mechanical seal unit that is installed between the housing and the rotating member to seal the pump chamber and a bearing that is operatively disposed between the rotating member and the housing at a position other than the pump chamber, in which an annular slinger is arranged at an axial end of the bearing and fixed to a fixed portion, the annular slinger having a given portion that slidably contacts to the rotating member.

Abstract: An interchangeable lubricating oil pump for use with two internal combustion engines having different lubrication requirements includes a pump housing and a drive shaft rotatably supported in an opening through the pump housing. A first end of the drive shaft provides a drive gear mounting location. First and second idler gear mounting locations of the pump housing are positioned a common distance from the drive gear mounting location. The interchangeable lubricating oil pump also includes a set of interchangeable gears including a small interchangeable gear and a large interchangeable gear. A first configuration for a first internal combustion engine having a first lubrication requirement includes the large interchangeable gear mounted at the drive gear mounting location and the small interchangeable gear mounted at the first idler gear mounting location.

Abstract: A method and apparatus for heating at least one fluid tank that receives production fluid comprising produced oil and a produced liquid from a hydrocarbon producing well. A layer of liquid is provided in the fluid tank that has a higher specific density and a higher thermal conductivity than the produced oil. The layer of liquid at least partially covers a heat trace positioned in the fluid tank. The heat trace transfers heat to the layer of liquid.

Abstract: A wheeled, manually movable, internal combustion engine powered pressure washer is mounted in a rigid frame formed of tubular steel elements. A pair of aligned wheels is pivotally mounted independently to each opposite side of the frame. Each pair of aligned wheels is provided with a pivot pin mechanism that enables the rear wheels to be lifted of the ground to facilitate pivoting the unit on the front wheels. The internal combustion engine is mounted toward the front end of the frame, and the pump toward the rear end of the frame. The upper front portion of the frame houses a fuel tank completely within the outline of the frame, and the tank holds more than two gallons of fuel.

Abstract: A hydraulic supply system for a hydraulically-operated automatic transmission includes a primary pump that is driven by an internal combustion engine of a vehicle. An electrically-driven auxiliary pump is provided to supply the system with hydraulic pressure when the primary pump is off or to supplement the primary pump when the primary pump does not deliver sufficient pressure. A discharge line from the auxiliary pump is connected to a control line of the hydraulic supply system and to the hydraulic system supply line under system pressure. Check valves are provided in the respective lines from the auxiliary pump. An additional check valve is provided in a line that extends from the control line to a torque sensing chamber of the automatic transmission.

Abstract: A wheeled, manually movable, internal combustion engine powered air compressor is mounted in a rigid frame formed of tubular steel elements. A pair of aligned wheels is pivotally mounted independently to each opposite side of the frame. Each pair of aligned wheels is provided with a pivot pin mechanism that enables the rear wheels to be lifted off the ground to facilitate pivoting the unit on the front wheels. Each pair of aligned wheels is selectively detachable from the frame to facilitate shipping. Two gas storage tanks are mounted to the bottom of the frame and disposed side-by-side. The internal combustion engine is mounted toward the front end of the frame. The upper front portion of the frame houses a fuel tank completely within the outline of the frame, and the tank holds more than two gallons of fuel.

Abstract: A wheeled, manually movable, internal combustion engine powered trash pump is mounted in a rigid frame formed of tubular steel elements. A pair of aligned wheels is pivotally mounted independently to each opposite side of the frame. Each pair of aligned wheels is provided with a pivot pin mechanism that enables the rear wheels to be lifted off the ground to facilitate pivoting the unit on the front wheels. Each pair of aligned wheels is selectively detachable from the frame to facilitate shipping. The internal combustion engine is mounted toward the front end of the frame. The upper front portion of the frame houses a fuel tank completely within the outline of the frame, and the tank holds more than two gallons of fuel.

Abstract: An internal combustion engine is coupled to a supercharger operable to supply varying amounts of air to the engine responsive to the load on the engine. The supercharger has a pair of screw rotors driven by the engine to move air to the engine and a control apparatus for varying the mass and pressure of air supplied to the engine.