Abstract: Disclosed is a compressor having a drive shaft in a crank chamber and a swash plate supported on the drive shaft for integral rotation therewith to drive a piston in a cylinder bore. The piston compresses gas sucked from a suction chamber into the cylinder bore and discharges the compressed gas to a discharge chamber and the amount of the discharged gas is variable between a minimum and maximum values based on variation of the inclined angle of the swash plate between a minimum and maximum values.
Abstract: A tube pump is disclosed for conveying liquid or viscous media, with a pump head on which at least two pump rollers are arranged, which rollers can be brought into engagement in succession with a tube wherein the medium to be conveyed is contained, in such a way that the medium is transported by squeezing the tube tightly. The tube pump according to this invention is distinguished in that the pump rollers can be shifted between two end positions, one of which positions (pumping position) permits the pumping operation and the other position (park position) permits a tube change without manual twisting of the pump head and without displacement of the tube bed.
Abstract: An internal combustion engine having cylinders and a head assembly adapted for compressing gas, wherein one or more cylinders of an inline-cylinder engine are modified to compress flammable gas, such as natural gas. The engine cylinders and head assembly are adapted to compress gas by: modifying existing engine valves to secure compressor intake and discharge valves within the head assembly; converting engine pistons into compressor pistons; inserting filler plates into the head assembly; and replacing the engine manifold, which is in communication with the adapted cylinders, with gas intake and discharge manifolds.
Abstract: A tube pump for conveying liquid or viscous media, with a pump head on which at least two pump rollers are arranged which latter can act in succession on a tube, carrying the medium to be conveyed and located in the tube bed, in such a way that the medium is transported by squeezing the tube tightly, wherein the tube bed and the tube are fashioned so that the tube can be inserted in the tube bed in only one direction. This can be achieved by using end pieces of differing geometric forms and/or sizes, and/or providing that one end piece is magnetic and providing a magnetic sensor in the corresponding socket of the tube bed.
Abstract: The invention provides a pump including a pressure valve which is formed within a carrier element capable of being inserted into the pump casing, with the carrier body including a channel leading into a chamber which, in turn, is in communication, through a restrictor, with the brake circuit to be energized. The carrier element, substantially, is of a cylindrical configuration, with the channel leading to the side wall of the cylinder, and the carrier element, in part, being inserted into a cup-shaped retaining element, and with the outer diameter of the carrier element being only slightly smaller than the inside diameter of the closure member.
July 20, 1994
Date of Patent:
October 22, 1996
ITT Automotive Europe GmbH
Peter Volz, Georg Obersteiner, Albrecht Otto
Abstract: A two-rotor, sliding vane rotary compressor for compressing fluid containing an inner rotor, an outer rotor, means for rotating said inner rotor and said outer rotor at the same angular velocity, and at least one sliding vane disposed between the inner rotor and said outer rotor. The outer rotor is has an inner surface which is has at least one flat portion. As the inner rotor rotates, the sliding vane contacts the outer rotor.
Abstract: A variable capacity swash-plate type compressor provided with a suction chamber for refrigerant gas before compression, a discharge chamber for compressed refrigerant gas, a crank chamber for a swash-plate assembly driving reciprocation of compressing pistons in cylinder bores of a cylinder block, a high pressure gas supply passageway fluidly communicating between the discharge chamber and the crank chamber so as to supply the crank chamber with a high pressure gas, a flow choke arranged adjacent to the high pressure gas supply passageway so as to regulate the pressure and flow rate of the high pressure gas flowing through the gas supply passageway, and a control valve unit for controlling extraction of the high pressure gas from the crank chamber toward the suction chamber in response to a refrigerating load.
Abstract: An air blower including a flow-thru motor and fan unit encapsulated in resilient foam rubber layer within a substantially cylindrical plastic casing is provided which operates very quietly, delivers a sufficient quantity of warm pressurized air and filters the air which flows therethrough. The air blower is eloquently simple in design and relatively inexpensive to manufacture. The air blower incorporates a number of safety features including an outlet structure which prevents the introduction of water into the interior of the blower and a ground fault circuit interrupter. The air which flows through the blower is channeled through the motor to cool the motor and at the same time heat the air flowing through the blower. The resilient foam encapsulation separates the noise and vibration of the motor and fan unit from the casing. The casing includes a plurality of radial air inlets in its base and an air outlet in the side of the casing adjacent its upper end.
Abstract: A multi-piston type refrigerant compressor having a cylinder block unit in which a plurality of cylinder bores receiving a plurality of reciprocating pistons for sucking a refrigerant gas, compressing the refrigerant gas, and discharging the compressed refrigerant gas, and a piston reciprocating actuating mechanism are housed, and a muffling unit defined by upright walls integral with the cylinder block unit and including a suction pulsation damping chamber, a discharge pulsation damping chamber, and an arrangement in which the covering plate of the muffling chamber, having ports formed so as to fluidly connect suction and delivery gas pipes to the muffling chamber, is arranged to be inclined, with respect to a horizontal plane, towards one of the cylinder block units.
Abstract: A volumetric pump and fluid control valve system for controlling the flow of fluid which comprises a housing containing an interior cavity, an elongated valve shaft is disposed inside the cavity, and an elongate drive shaft of smaller diameter than the valve shaft connected to one end of the valve shaft. The drive shaft passes through a passage formed in the housing to extend from the cavity to the exterior. A resilient sheet of material having an aperture is disposed in the housing on the exterior side of the passage and the drive shaft passes through the aperture to form a sphincter seal. The drive shaft can be used to move the valve shaft back and forth in a reciprocating motion producing positive and negative pressures causing fluid to flow or merely to stabilize the valve shaft in position. The valve shaft includes two flanges which are spaced apart from one another. The flanges extend at least partially around the circumference of the valve shaft.
Abstract: A device is provided for feeding pressurized liquid to a hydraulic circuit of a hydraulic actuation element. The device includes a motor, a flywheel and a positive displacement pump. The positive displacement pump and the flywheel are mounted on a common shaft. The device also includes a flywheel containment structure suitable for retaining the flywheel in the event of accidental breakage, and a motion transmission element. The containment structure rigidly supports a pair of seats for shaft bearings, and a seat for the pump.
Abstract: A variable displacement axial piston hydraulic unit includes first and second control pockets individually disposed between first and second arcuate shaped fluid passages, a first electrohydraulic valve for controlling fluid flow between the first control pocket and the first fluid passage and a second electrohydraulic valve for controlling fluid flow between the second passage and the second control pocket. A controller outputs first and second control signals to the first and second electrohydraulic valves in response to receiving a command signal so that the tilt angle of a swashplate is controlled to obtain a desired operating parameter. An angle detector, a pressure detector, and a speed detector provide feedback signals to the controller for determining when the desired operating parameter has been obtained.
Abstract: A fluid infusion pump includes a disposable cassette having an inlet, an outlet, and a fluid chamber between the inlet and the outlet. There is a fixed wall of the fluid chamber and a movable wall of the fluid chamber. A pump body receives the cassette in a fixed operating relationship such that an actuator in the pump body is activatable for reciprocal advancement and retraction with respect to the cassette and is adapted to confront the movable diaphragm when the cassette is received in the pump body. There is a detachable coupling between the actuator mounted in the pump body and the movable wall so that fluid is expelled from the fluid chamber on advancement of the actuator and positively drawn into the fluid chamber upon retraction of the actuator.
July 27, 1994
Date of Patent:
September 10, 1996
Dana J. Owens, Aaron Raines, Ed G. Rasmussen, David G. Ozinga, David J. Harrison, Carl R. Anderson
Abstract: A medical infusion pump (10) using a pump chamber cassette (86) has a housing (20,22) defining a pump chamber cassette receptacle (84) and a pump driving mechanism (250) for propelling liquid through the pump chamber cassette. A door (50) holds the pump chamber cassette (86) within the cassette receptacle (84) in an operative position relative to the driving mechanism (250). The cassette includes an elastomeric conduit (132), a frame (134) and clips (146,148) for attaching the elastomeric conduit (132) to the frame (134) for holding the elastomeric conduit (132) in a select position relative to the pump driving mechanism (250) of the infusion pump upon placement of the cassette (86) in an operative position relative to the pump driving mechanism (250).
May 11, 1995
Date of Patent:
September 3, 1996
Baxter International Inc.
Mark E. Williamson, Jerry W. Newbrough, Robert L. Anderson, Jeffrey P. Castleberry, Warren P. Heim, Steve W. Stracener
Abstract: A vacuum pump comprises a casing body (11,12) having a cylinder liner (16) therein which defines a primary exhaust passage between the outer wall of the liner and the inner wall of the body. The exhaust passage includes restrictors (20,21), which permit the spaces (37,38) in the interior of the body to be used as silencer chambers.
Abstract: An IV fluid delivery system for use with a resilient, deformable tube, wherein a mechanism is provided to restore the cross-sectional shape of the tube after it has been deformed by a plurality of pinchers, so as to improve the accuracy, consistency, reliability and predictability of flow through the tube.
Abstract: A peristaltic pump is disclosed for attachment to a slurry mixing machine. The peristaltic pump includes an occluder ring, a pump rotor driven by the drive of the slurry mixing machine, a plurality of compression wheels driven by the pump rotor, and a flexible compressible hose. The occluder ring is supported on a hinged support in a manner that will permit the occluder ring to be hinged away from the compression wheels and flexible hose when slurries are not to be pumped through the hose and to be moved into cooperating alignment with the compression wheels and flexible hose when slurries are to be pumped. The hinged occluder ring functions as a clutch mechanism in the pumping of slurries.
Abstract: A unit for delivering fuel from a supply tank to the internal combustion engine of a motor vehicle in which an electrical drive motor, which is embodied as an axial field motor, drives an impeller of a feed pump, which is embodied as a peripheral feed pump. In order to embody the delivery unit as flat as possible in the axial direction of the impeller, the rotor part of the axial field motor is disposed on the impeller, which carries the blades and which revolves in a pump chamber, and is combined with this impeller into one common element. The rotor windings of the rotor part can be disposed either inside a circle constituted by the blades of the feed pump or on the impeller radially outside the blades; the permanent magnets of the axial field motor are accordingly disposed in the housing, opposite the rotor windings.
Abstract: A compressor includes a motor for reciprocating a piston which sucks-in refrigerant through an inlet, and discharges compressed refrigerant through an outlet. A cylinder head forms a discharge chamber communicating with the outlet, and also forms a recess disposed opposite the inlet. Mounted in the recess is a base muffler which includes a pair of elastically flexible, tapered tubes connected by a snap-in connection to a suction muffler. Refrigerant travels through the suction muffler and the base muffler to the inlet. The base muffler insulates the refrigerant from heat radiated by the motor. A capillary tube conducts oil from an oil reservoir to the base muffler for being mixed with the refrigerant.
Abstract: A variable capacity swash plate type compressor having a hinge unit having a support arm protruding from a back side of a rotor, and a guide pin having one end thereof fixed onto a rotatable swash plate. The support arm has guide holes or guide surfaces which are parallel with a plane passing through a central axis "O" of a drive shaft and the top dead center position of the swash plate, the holes extending in a direction in which the holes approach the drive shaft from the outer edge of the rotor. Sections taken so as to be perpendicular to the center lines of the holes (guide surfaces) can be circular. A spherical element interacting with the guide holes is arranged at the end of the guide pin away from the rotatable swash plate. Thus, the spherical element of the guide pin interacts with the guide holes so that the suction force, compressive reaction force and torque are sustained on a line.