Abstract: A scavenging system for single screw compressors to remove residual liquid eal from an open combustion chamber prior to controlled liquid seal injection. The removal of residual liquid seal is accomplished by providing the casing with a scavenging slot which surrounds a portion of the open combustion chamber thereby allowing centrifugal force to radially remove residual liquid seal.
July 3, 1986
Date of Patent:
October 4, 1988
The United States of America as represented by the Secretary of the Navy
Abstract: A vane-type compressor is disclosed having a rotor that is disposed eccentrially in a housing cylinder. Vane sliders are guided in the rotor so that they deviate by a few angular degrees from the radial direction. Elastic O-rings are provided in end-face ring grooves of the rotor, which rings are elastically deformable in their cross-section with the rings acting as noise-reducing spring and damping bodies for the vane sliders when moving adjacent their respective inner dead-center position. For promoting the durability of the O-rings they are constantly twisted by the tangential component of the impact force of the vane sliders inside the ring grooves.
June 8, 1987
Date of Patent:
September 20, 1988
Bayerische Motoren Werke Aktiengelleschaft
Abstract: A variable vane-type pump in which a cam ring with variable eccentricity encompasses a rotary piston comprising vanes guided in radial slots. At least one lateral surface of the rotary piston abuts on the contact surface of a control disc with pressure pocket and suction pocket. A channel is provided in the control disc whose intake opening is disposed in the direction of rotation of the pump between pressure pocket and suction pocket and in direct vicinity of the end of the pressure pocket. The channel terminates in a housing chamber, the waste oil chamber, the lubricating channels and/or into the under-vane chambers. After displacement of the cam ring, a connection can be established between the channel and the pressure pocket so that the pressure fluid still delivered can discharge via the channel to safeguard lubrication of the pump.
Abstract: A product pump assembly including a product pump having a product receiving inlet, a product discharge outlet, a product chamber, and an air port. A cone-shaped feed valve in the product chamber is forced upwards against the inlet thereby sealing it when pressurized air is forced through the port into the chamber, during the evacuation cycle of the pump assembly. The pressurized air is deflected against the valve sweeping the product out of the chamber through the outlet and via a delivery line to the product collector. An ejector is energized during the fill cycle to withdraw the air from the chamber through the air port, thereby opening the valve and pulling the product into the chamber.
Abstract: A card shuffler has a plurality of vertically stacked mixing pockets for holding cards. A first vertically traveling elevator holding cards to be shuffled distributes cards one at a time in sequence to the mixing pockets in accordance with a first distribution schedule. A second vertically traveling elevator on the opposite side of the mixing pockets from the first elevator picks up all of the cards from each mixing pocket one mixing pocket at a time in sequence according to a second distribution schedule. Cards from the second elevator are transferred to an output reservoir for use by a dealer.
Abstract: An oil pan structure of generally rectangular cup-like configuration having a rear end adapted to be connected with a clutch housing, which comprises reinforcement wall structure formed with the oil pan structure so as to protrude away from the rear end towards the clutch housing. The reinforcement wall structure defines a space between the rear end of the oil pan structure and the clutch housing when the oil pan structure is secured to the clutch housing, and has a portion cut away to define an access opening communicated with the space The access opening is located immediately below at least one bolt receiving boss formed in the rear end of the oil pan structure for the passage of a fitting bolt used to connect the oil pan structure from below to a cylinder block. The oil pan structure also comprises a cover member removably fitted to the reinforcement wall structure for closing the access opening.
Abstract: The invention is directed to a ratchet or hold-down mechanism for a motor which is pivotally connected to a base of a compressor attached to an air receiving tank. The compressor is provided with a base having a pair of legs at one end which terminate at resilient pads resting on the tank. The motor is attached to the compressor base adjacent the legs for limited pivotal movement toward and away from the compressor. A ratchet or hold-down mechanism is provided between the motor and the compressor base to restrict pivotal movement of the motor toward the compressor while allowing the motor to pivot away from the compressor to increase the tension on a belt connected therebetween. The ratchet mechanism maintains tension on the belt in the event that the portable air compressor is picked up by the motor or is accidently tipped on its side. In addition, the ratchet mechanism maintains a minimum tension on the belt during operation of the motor.
Abstract: A drive system for a down hole oil well pump includes a cylinder assembly which defines first and second cylinders. A pump rod which includes first and second pistons, each disposed in a respective one of the cylinders, is coupled to the down hole pump. A hydraulic accumulator supplies a resilient biasing force to one of these pistons to counter the weight of the ram interconnecting the pump rod and the down hole pump. A hydraulic pump supplies pressurized hydraulic fluid which is alternately directed against upwardly facing and downwardly facing piston faces of the pump rod to cause the pump rod to oscillate, thereby driving the down hole pump. Fluid level sensors deactivate the hydraulic pump when the oil level in the oil well falls below a pre-set level.
Abstract: Method and apparatus for transferring and boosting the pressure of gas from a source to a receptacle by sequentially filling and compressing volumes of gas by displacing same with a fluid available at a higher pressure and utilizing pressure differential between the gas and fluid to signal the filling and compressing cycles.
Abstract: A pumping unit has a drive train comprising a very large mass including large diameter series connected sheaves, one of which is a large crank sheave. The crank sheave is directly connected to a pitman arm which oscillates a walking beam, which in turn reciprocates a horsehead attached to a bridle. The bridle is connected to a polished rod associated with a downhole pump. The crank wheel, pitman arm, and rocking beam are arranged respective to one another to cause the tail bearing to oscillate predominantly in the second quadrant, and to cause the center of gravity of the pitman arm to be located predominantly between the vertical axis of the crank wheel and the Samson post bearing. The geometry of the crank wheel, pitman arm, and rocking beam provides substantially constant, positional of the polish rod on the downstroke, with rapid positional occurring at peak polish rod velocity, which causes a longer downhole pump stroke because of the induced elongation of the sucker rod string.
Abstract: An enclosed type compressor comprises an electric motor and a compressor pump directly coupled with the electric motor, both enclosed in a casing. A centeradjusting plate having a through hole at the center is provided between the electric motor and the compressor pump. The center-adjusting plate is disposed perpendicular to the central axis of the internal surface of the stator of the electric motor. The rotor of the electric motor is coupled with the compressor pump and the combination thus obtained is secured to the center-adjusting plate in a manner such that the central axes of the rotor and the internal surface of the stator are aligned with each other. A method for assembling the enclosed type compressor is also disclosed.
Abstract: A plurality of unloading steps for a compressor are achieved by providing the compressor with at least two cylinders having different displacements. By unloading different cylinders, the compressor output is better able to match system demand.
Abstract: A scroll-type fluid machine for an air conditioning machine comprises a hermetically closed vessel which houses therein an orbiting scroll member and a stationary scroll member forming together a compressor portion, an Oldham ring member for preventing the orbiting scroll member from rotating about its own axis, a driving motor having a driving shaft connected to the orbiting scroll member for driving the same, and a frame for supporting the shaft, a low pressure liquid introducing passage for making the interior of the hermetically closed vessel a low pressure chamber, and a high pressure fluid discharge passage. A sealing member is provided at the back of the orbiting scroll member with its surfaces slidably contacting the frame and the orbiting scroll member to form a chamber separated from the low pressure chamber.
Abstract: A pump for conveying a viscous medium, comprising a feed hose in the pump housing, a support wall extending along the feed hose and supporting the feed hose in the housing, pressure rolls mounted for movement along the feed hose diametrically opposite the support wall and arranged to compress the feed hose between the support wall and a respective pressure roll as the pressure roll moves along the feed hose whereby the feed hose is successively deformed from a normal, expanded shape to a compressed, flattened shape and the viscous medium therein is conveyed from a suction to the output end of the feed hose, and a centering device engaging the feed hose at its periphery for holding the feed hose in alignment with the support wall and for returning the feed hose from the compressed to the normal shape after the pressure roll has passed, the centering device including resiliently yielding support elements mounted in the housing and arranged at both sides of the feed hose, the support wall and the pressure roll d
Abstract: An improved blower assembly particularly useful for liquid bath type vacuum cleaners is disclosed. The improved blower assembly features enhanced noise attenuation achieved by providing a four-stage noise reduction system featuring a serpentine airflow path at the blower assembly air inlet and outlet. The four stages of the noise reduction system are comprised of; a noise reduction stage housing, a lower stage assembly, an upper stage assembly, and a motor base, respectively. Improvements in the production assembly techniques of the blower assembly components are further provided through a modified upper stage assembly which is assembled to a motor base component by a partial turn and lock procedure so that the components become firmly locked together and accurately positioned. This production technique can be accomplished quickly without a requirement of a high degree of operator skill.
Abstract: An electric motor driven inline hydraulic apparatus comprises a common housing, a stationary shaft mounted in said housing and spaced pump cylinder block subassemblies that rotate around and are mounted on said shaft. Each subassembly includes a cylinder block and a plurality of circumferentially spaced pistons. The cylinder block subassemblies are positioned such that the pistons of one subassembly extend toward the other subassembly. A common yoke plate is mounted between the two cylinder blocks and bears the two groups of piston shoes, one on each of its two bearing surfaces. Each cylinder block is driven independent of and in direction opposite to the other by an electric motor integrally mounted such that its hollow rotor houses the block and drives it. All components described above are contained in one housing and operate submerged in hydraulic fluid.
Abstract: A pump comprising an elongated housing adapted to be positioned in a landfill gas well. The housing has a peripheral wall, an interior chamber and apertures in the peripheral wall leading from the exterior of the housing to the chamber so that liquid can flow from the well into the chamber. A pressure responsive valve member is mounted in the chamber on the peripheral wall and extends across the apertures. A discharge conduit extends from the chamber to a location above the housing. When the liquid level in the chamber rises to a predetermined upper level, gas under pressure is supplied to the chamber. The gas under pressure causes the pressure responsive valve member to close the apertures and it forces the liquid out of the chamber through the discharge conduit.
Abstract: Apparatus for picking up and conveying crop has a high-speed rotor 21 mounted on a mobile frame 50 for movement over the ground to pick up previously cut crop. A hood 54 extends around part of the front of the rotor and moves relative to the frame in response to the crop to effect automatic adjustment of the clearance. Heavy unwanted objects, whether metallic or non-metallic, are detected by an impact detector 25A. Metallic objects (whether large or small) are detected by an electromagnetic detector 25B. The detectors are positioned in various alternative locations, either on the moving hood, or on static portions of the frame.
February 13, 1985
Date of Patent:
January 26, 1988
National Research Development Corporation
Abstract: A hydraulic tensioning device for tracked vehicles comprising a hydraulically chargeable piston-cylinder unit, coupled on one end with the body of the vehicle, and with the other end to a guide wheel for the track chain which is supported on a rocker arm. In order to obtain the proper track chain tension in any operating condition without providing a separate hydraulic pump, the piston unit is equipped with a tappet supported against the piston unit by means of a spring unit. The tappet closes off a secondary cylinder chamber in the piston unit which is connected with the principal cylinder chamber by two check valves which seal in opposite directions. The tappet effects a pumping action as the result of the vibration generated by the chain links running in and out the guide wheel, thereby pumping the hydraulic oil from a hydraulic oil reservoir into the secondary cylinder chamber and from there into the principal cylinder chamber.
Abstract: A fluid pump is disclosed having a plunger reciprocating within a working cylinder and a standing intake retention valve. The plunger comprises a stem having affixed to it a plug and a stop, a body being slidably engaged to the cylinder an located on the discharge side of the plug and on the intake side of the stop. Upon the upstroke of the plunger, a plug surface engages with a body seal and therefore pumps the fluid before it. Meanwhile, fluid flows in behind the plunger through the standing intake retention valve. Optionally, a standing discharge retention valve is employed to alleviate the vapor lock condition caused by the combination of counterpressure effect and gases in the fluid. On the downstroke, the plug disengages from the body, allowing fluid to flow noncompressibly past the plunger. Wiper means keep the cylinder surface clean of precipitated solids, so as to prevent abrasion to the sliding exterior surface of the body.