Abstract: A diaphragm-type vacuum pump device which includes a diaphragm, a pumping chamber the volume of which is changed by reciprocating motion of the diaphragm, a check valve for drawing air into the pumping chamber, a check valve for discharging air from the pumping chamber and an orifice or relief valve disposed in the pumping chamber so that the pumping chamber communicates with atmosphere.

Abstract: A swashplate type hydraulic pressure device comprising a cylinder and a swashplate which is rotatable relative to the cylinder and rotatably supported on a holder, the cylinder having a number of plungers disposed thereon axially slidably in an annular arrangement, in which a spherical end is formed at that extreme end of each plunger which is in abutment with the swashplate, and the swashplate is provided with a spherical concave portion for engagement with the spherical end. By cooperation between the spherical concave portions and the ends, the cylinder rotates synchronously with the swashplate and an aligning action is imparted to the swashplate from the group of plungers of the cylinder.

Abstract: A high-pressure plunger pump includes a pump housing centered on an axis and including a main body having two axially spaced ends, and a pump head secured to one of the ends of the main body. A plunger coaxially extends into the pump housing and a sleeve is floatingly supported on the plunger. The sleeve has two end portions one of which is closer to the pump head than the other, converges toward the pump head and has an axial end face. An insert body is positionally secured in the pump housing at the one end portion of the sleeve and bounds a circumferentially extending annular suction channel with this one end portion. The insert body includes an annular shoulder having a substantially axially facing seating surface. Pressure and suction valves are coaxially arranged within the housing.

Abstract: In accordance with the present invention, a diaphragm pump having a housing, a first chamber within said housing, a second chamber within said housing and a pair of diaphragm elements mounted in said housing between said first chamber and said second chamber, is provided with a failure sensing system for the diaphragm. The failure sensing system including a failure sensing device which is between the two parts of the diaphragm and an indicator circuit which includes the conductive liquid which is being pumped and an alarm. The two parts of the diaphragm element are clamped together proximate their peripheral edge such that a circumferential fluid tight compression seal region is provided. The sensing device includes an electrically conductive lead which extends from the exterior of the housing, through the circumferential fluid tight seal region into the region peripherally inward of the seal region.

Abstract: A swash plate plunger type pump-motor comprises a casing, a rotatable cylinder block formed with chambers, a plurality of plungers axially slideably received in the chambers, rotatable swash plate rotatably supported through a bearing within the casing, a plunger retainer adapted to prevent the plungers from disengaging from the swash plate, and a rotational shaft on which the cylinder block is fixedly mounted. The plunger retainer and the swash plate are connected with each other in such a manner that the front faces of the plunger head portions contact the swash plate and that the rear faces of the plunger head portions contact the plunger retainer. The rotational axis of the swash plate is inclined at a predetermined angle with respect to the rotational axis of the rotational shaft.

Abstract: A pressure intensifier for a fluid comprises at least three piston assemblies disposed along mutually parallel axes equiangularly disposed with respect to a central axis of the intensifier and radially equidistant therefrom. Each piston assembly has two opposed high pressure cylinders and low pressure cylinders. Fluid is supplied to the low pressure cylinders and discharged through a low pressure valve operatively coupled by a swash plate to the pistons of each assembly so as to be driven thereby. A high pressure collector, optionally in the form of a closed circuit, is provided for receiving high pressure fluid from the high pressure cylinders.

Abstract: A dosaging pump which can be placed, in particular, on bottles or the like, having a pump bellows and two valves, one of which is associated with the inlet side and the other with a nozzle. The nozzle-side valve-closure member is seated in the cover of a cap which grips over the pump bellows and the side wall of which is guided on the wall of a cup which surrounds the pump bellows, the inlet-side valve-closure member being seated in the bottom of the cup which is formed with an air-inlet opening. End folds of the pump bellows are seated on separate collars of the cup and the cap, and the end folds extend into outwardly directed protruding base support rings. A cup-bottom side of the base support rings has a sealing lip extending over the air-inlet opening in the cup bottom and the lip has a free-standing lip section resting against an inner wall of the cup.

Abstract: A variable capacity wobble plate compressor in which pressure in a crankcase accomodating a wobble plate is controlled by a pressure-control valve disposed across a communication passage connecting the crankcase and a suction chamber, whereby the delivery quantity or capacity is varied with a change in the inclination angle of the wobble plate depending on the pressure in the crankcase. The pressure-control valve comprises bellows variable in length with a change in the magnituted of suction pressure, a valve body attached to one end of the bellows, a first movable member attached to the other end of the bellows, a first spring urging the valve body in the closing direction, a second movable member which is brought into or out of urging contact with the first movable member in response to at least a change in the discharge pressure, and a second spring interposed between the second movable member and a spring seat.

Abstract: An axial piston device with a plurality of mechanically actuated, rotory valves having their front faces sealing for the control of flows of fluid is suggested for the connection of ports of its housing to ingoing and outgoing passages of a combustion engine or of other pump arrangements, motoring or transmission arrangements. The device includes working chambers which periodically contract and expand their volumes to take in and expel flows of fluid from the working chambers to and through the valves to the ports and for reversed flow direction. The device is thereby specifically suitable for the communication to external combustion chambers which burn coal powder fuel and which are provided with means to remove, in the external combustion chamber or in a passage, unclean particles from the hot gases before they enter into the expander unit of the device.

Abstract: A seal and retainer assembly for an air compressor piston includes a cup-shaped seal with its marginal edge extending at an angle relative to the cylinder wall, the seal having a notch extending circumferentially at the base of its marginal edge defining a hinge which allows pivoting of the marginal edge relative to the main body portion of the seal which is clamped to the piston. A head plate includes an air intake port for communicating the compression chamber with an air inlet and a discharge port for communicating the compression chamber with a compressed air discharge outlet, each of the ports having a flexible spring closure member cooperating with an inclined valve seat to allow the ports to be open whenever the compressor is shut off.

Abstract: A cup-like device, called a deturbulator, having a solid base portion and vertically oriented finger-like elements extending therefrom is disposed in the oil sump of a refrigeration compressor so that the base portion is spaced from the bottom of the oil sump. The compressor has a mechanical stirrer which is driven through the sump oil when the compressor is in operation to purposefully agitate the oil in order to create a sound attenuating blanket of foam within the compressor shell. The stirrer is disposed interior of the deturbulator so that the turbulence created by the stirrer in the oil agitation process is localized and contained within the interior of the deturbulator. The bottom of the oil sump, wherein debris normally collects, is therefore shielded from turbulence which would otherwise tend to stir the debris into the oil. The finger-like elements of the deturbulator both act to break up any wave action in the sump oil and to facilitate the production of foam to quiet the compressor.

Abstract: A bush assembly is inserted into the rotor hub around a cylindrical control body which is partially extending into the bush to fill the interior of the bush. In such device, where fluid flows through the control body and the working chambers in the rotor of the machine, leakage escaped through the clearance between the control body and the rotor. Due to the novel bush assembly the respective high pressure is led through passages which extend half way around the bush into recesses diametrically located in the bush. There the pressure is utilized to press respective seal-portions towards the control body to at least partially seal the escape of leakage, while maintaining a radial pressure balance between the control body and the bush.

Abstract: A variable displacement wobble plate type compressor with a variable angle non-rotary wobble plate, having a suction chamber for refrigerant returning from a refrigerating circuit via an evaporator, a discharge chamber for refrigerant after compression, suction and compression cylinder bores formed in a cylinder block, pistons reciprocating in the cylinder bores, a crankcase attached to the end of the cylinder block and receiving therein a drive and a wobble plate mechanism mounted about a drive shaft connectable to a rotary drive source, connected to the pistons to cause reciprocating motion of the pistons and capable of changing the wobble angle thereof and thereby change the strokes of the pistons, a first passageway for communicating the crankcase interior chamber with a discharge chamber to supply pressure acting as a back-pressure applied to the pistons, a control valve unit for closing and opening the first passageway, a second passageway extending through the drive shaft for communicating the crankcas

Abstract: The inclination angle of the wobble plate in a wobble plate type compressor is changed to obtain a discharge capacity in accordance with a cooling load. A spring is provided to adjust the inclination angle of the wobble plate in cooperation with the pressure force acting upon the pistons connected to the wobble plate, and thus the pressure in the suction chamber corresponding to the temperature of the exhausted air is kept at a constant level. That is, the temperature of the exhausted air is kept at a constant level suitable for maintaining a desired cooling condition in a vehicle.

Abstract: A turbo compressor mounted upon a hollow box-like housing is provided with a noise suppressor which includes a rectangular open ended box-like structure suspended from the housing by flexible walled tubes which constitute an air inlet and an air outlet to the housing through which air flows to prevent heat build up within the housing. The suppressor walls are lined with a sound absorbent material which, combined with the non-rigid suspension of the suppressor from the housing and the non-linear air entrance and exit paths to and from the housing, suppresses sound generated by flow of high pressure air from the compressor into the housing through a shaft bearing. Noise generated by the flow of air into the compressor inlet is reduced by blocking the inlet with a block of porous foamed plastic material which also functions as an inlet filter.

Abstract: A fuel delivery system which includes a fuel pump and a dc motor, which are preferably contained within a unitary housing. A pressure-sensitive switch, which is either contained within the unitary pump/motor housing or as a separate structure, includes a movable contact positioned within a housing so as to form a first chamber for receiving fuel under pressure and a second chamber for venting to atmosphere. A spring urges the movable contact against a second contact for applying electrical power to the pump motor. When the pump output pressure exceeds the force exerted on the movable contact by the spring, electrical conduction between the switch contacts is broken and motor power is interrupted. Current to the pump motor is thus pulse-width modulated as a function of pump output pressure, fuel demand, and the adjustable force exerted by the pressure switch spring.

Abstract: A motor-driven compressor used as a compressor or high-pressure gas generator for a refrigerating cycle, in which the output torque of the electric motor for driving the compressor is controlled so as to make the output torque agree with the load torque required for performing compression in any revolutional angular position of the driving main shaft to thereby reduce revolutional torsional vibrations caused by disagreement between the load torque and the output torque.

Abstract: In a radial piston pump, motor, transmission the deep diving or entering piston shoe is utilized and swingably borne in the pivot-bed of the radially reciprocating piston. Since deep diving piston shoes have large piston strokes, the shoes pivot in the pistons in large angles. Thereby a considerable force - portion of the load on the piston is transferred to the wall between the piston and the cylinder, whereby heretofore short pistons occasionally produced welding and sticking between the cylinder wall and the piston wall. The piston therefore receives radially extending portions, which may extend beyond the medial portion of the piston shoe and may even enter into the ring groove of the piston stroke actuator ring. Thereby a very long guidance of the piston on cylinder wall portions is obtained, which makes the application of effective pressure balancing pockets at correct location between piston wall and cylinder wall possible.

Abstract: Vacuum pumping system comprises a plurality of vacuum processing vessels, semiconductor processing reactors, and the like, connected to a common manifold evacuated by a generously large central vacuum unit. The manifold is maintained at a substantially constant designated pre-set pressure higher than the pressures within the reactors by means of a gas bleed inlet valve controllably feeding an inert gas into the manifold. A blower package with valving, interposed between each reactor and the common manifold, discharges directly into the manifold and prevents pressure surges and excursions in the manifold and reactors as well as permitting each reactor to operate at different pressures independently of the existing manifold pressure.

Abstract: Automatic starting of a hydrokinetic amplifier 10 is accomplished by: an overflow pilot valve 32 responsive to output pressure for opening an overflow line 30 when output pressure drops below a predetermined level; and a start-up pilot valve 36 responsive to reduced pressure within amplifier 10 upon opening of overflow pilot valve 32 so that the reduced internal pressure opens the start-up pilot valve and admits vapor into the amplifier to merge with the already flowing liquid and start up the amplifier. Preferably a safety pilot valve 38 arranged in the vapor input line 13, in series with start-up pilot valve 36, closes the vapor input line whenever liquid input pressure to the amplifier falls below an adequate level.