Abstract: A delivery valve, especially for a rotary piston compressor, which valve is adapted to be inserted into an opening provided in the compressor housing and extending substantially parallel to the axis of the compressor housing. The compressor housing has a bore in which is fitted a sleeve which has tangentially directed valve slots and forms a valve seat. The sleeve surrounds a member which over its entire length has an approximately horseshoe shape. That portion of the horseshoe shaped part which is located opposite the open side thereof faces toward the valve slots and has a greater bending radius than the sleeve. The free ends of the horseshoe shaped part which define the open side of the horseshoe shaped part are bent back toward the outside of this part while the lateral flanks of the horseshoe part bear against the sleeve.

Abstract: The disclosure is directed to a rotary engine having an annular housing and a plurality of walls disposed around the interior of the housing with adjacent walls joined by rounded corners. A plurality of sliding pistons are disposed within the interior of the housing spaced apart from one another and connected radially to a drive shaft extending through the interior of the housing along the central axis thereof. The sliding pistons having face portions adapted to slide adjacent the inner surfaces of the walls are disposed radially outward of the drive shaft. End plates disposed at opposite sides of the housing and intersecting the central axis thereof enclose the opposite sides of each sliding piston which extend to adjacent the inner surfaces thereof. The sliding pistons are guided around the plurality of walls and rounded corners of the housing chamber by cams attached to the end plates.

Abstract: A rotary compact compressor having through vanes of fixed length slidably mounted in intersecting slots of a cylindrical rotor which rotates on an eccentric axis in a cylinder working chamber formed with a developed surface. The rotor includes an integral forwardly extending drive shaft which is supported in a cantilevered rotatable manner by single bearing means in a front head housing. The cantilevered rotor facilitates assembly of the through vanes by virtue of the rotor intersecting slots being open throughout their diametrical extent to the rotor rear face. The structure further includes a combined cover and valve plate enclosing the front face of the rotor housing section.

Abstract: A rotary pneumatically powered tool comprising a housing, a motor assembly mounted in the housing and comprising a pneumatic motor for rotating an output shaft, and vibration absorbing mounting means for supporting and vibration insulating the motor assembly relative to the housing. The vibration absorbing means comprises a resilient connection piece for cramping the motor assembly axially in the housing and for interconnecting air passages in the motor assembly and the housing so as to enable communication of pressure air to and from the pneumatic motor of the motor assembly.

Abstract: An apparatus having an alternately expanding and contracting chamber comprises at least one pair of cylindrical rollers each having an exterior surface in continuous rolling engagement with the surface of the other roller of the pair, the rollers being rotatable along parallel axes, and two parallel side walls, with each one of the rollers also being in continuous rolling engagement with one of the side walls. A third wall is opposite the rollers and joins the two side walls wherein the chamber is defined between these walls and the pair of rollers, and is enclosed.

Abstract: A muffler is integrally incorporated with a pneumatic tool by cooperating with the tool housing intermediate the air exhaust chamber for the air motor and atmosphere. An inwardly dished muffler shell includes an exhaust inlet for receipt of exhaust air from the air motor. The shell is selectively positionable and may be combined with screen and additional muffler material as well as a retaining plate in any of a number of combinations to provide distinctive muffling characteristics for the air tool.

Abstract: A pressure valve arranged in a rotary piston compressor which valve is mounted in a passage or bore of the housing casing of the compressor. The last mentioned passage is axis parallel to the rotary piston compressor axis. The valve has a cylindrical cross section and can be inserted into the passage or bore parallel to the compressor axis behind an outlet opening in the track of the housing casing through a side wall of the compressor. The valve seat is formed by a longitudinally slotted tubular part which exerts a radially outwardly directed resilient force. The slotted tubular part comprises segmental valve opening slots extending parallel to the side walls of the compressor. Over the slots are located valve lugs or tongues which are cut from a thin-walled tube arranged with a precise fit in the tubular part while the roots of the valve lugs or tongues are connected to the thin-walled tube. An additional tube is with precise fit inserted into the thin-walled tube.

Abstract: A pneumatically operated vane-type motor for driving medical or dental handpieces. A stator housing forms a rotor chamber in which a rotor is mounted, the rotor having axial slots in which rotor vanes are radially movably mounted. The rotor rotates about an axis which is parallel to but spaced from the axis of a cylindrical inner surface of the housing which is circular in cross-section. A co-axial bearing ring is rotatably mounted in the inner surface of the housing, and the inner surface of the bearing ring is engaged by the outer ends of the vanes.

Abstract: The multi-sectional driveshaft for a multi-unit rotary piston mechanism has a plurality of driveshaft sections of identical configuration, arrangted co-axially with the end portion of one section telescopically engaging the end portion of a next adjacent section. Each section comprises an elongated body having an axial bore therethrough and an eccentric portion between the opposite end portions of the elongated body. One end portion is of reduced size with a shoulder extending normal to the axial bore. The other end portion of each section has a portion of the axial bore adjacent thereto of a size and configuration complementary to the one end portion for receiving and engaging the one end portion of the next adjacent section.

Abstract: A rotary compressor having a discharge check valve and retainer assembly in which the valve is a reed type valve mounted on the retainer and the retainer having spaced locating projections for positioning the assembly in a valve chamber. The retainer has arcuate end portions that when undistorted have a curvature greater than the corresponding end portions of the chamber so that the retainer and thus the valve is locked securely in position in the chamber by the distortion of the end portions and the projections.

Abstract: A rotating liquid pump, especially a vane cell pump, which is equipped with a disc-shaped rotor which together with a housing encloses at the circumference rotating feed spaces and which is non-rotatably but axially movably retained on a drive shaft by means of a form-locking connection while the disc-shaped rotor is axially fixed between housing walls that abut end-face at the disc-shaped rotor; the form locking connection is thereby subdivided into two separate axial mounting or support areas located as close to the disc-shaped rotor end faces as possible.

Abstract: An improved rotary mechanism such as a rotary engine, and, more specifically, an improved clamp for securing the center and end housings of such mechanisms together. The improved clamping means include at least one elongated bracket having a convex face when unstressed, with the convex face being in contact with the side of one of the end housings opposite from the center housing. Bolts are employed to stress the clamping bracket to bring the convex face into contact with the end housing side along most of the length of the face to eliminate localized stress.

Abstract: In a pneumatic motor that includes a vaned rotor, a rotor chamber having a gas inlet and gas outlet means, a housing and an axially extending rotor shaft to rotate in said chamber, structure to control and muffle the escape of exhaust gas comprisingA. a first exhaust chamber extending about the rotor chamber and into which pressurized exhaust gas escapes from the rotor chamber,B. a second exhaust chamber spaced axially from the first exhaust chamber and extending about the shaft, and primary porting communicating between the first and second exhaust chambers, andC. a third exhaust chamber extending about the shaft and located radially inwardly of the second exhaust chamber, there being radially inwardly extending porting spaced about the shaft and communicating between the second and third exhaust chambers to direct escaping exhaust directionally inwardly and in conflicting turbulent streams to dissipate energy contained in said streams.

Abstract: Disclosed herein is a rotary piston engine comprising a housing assembly including a trochoid housing and a pair of end housings aligned and secured together to define a trochoid cavity, a shaft rotatably supported in the end housings and having an eccentric portion disposed in the trochoid cavity, a rotary piston rotatably supported on the eccentric portion of the shaft and extending within the trochoid cavity, the rotary piston having an internal timing gear, a stationary gear separate from the end housings and in mesh with the internal timing gear, a female member extending integrally from one of the end housings and being disposed adjacent to the trochoid housing, the female member having a registering surface in predetermined fixed relation relative to the end housing, and a male member extending integrally from the stationary gear, the male member being pressed into the female member and held in non-rotatable relation by the registering surface.

Abstract: An apparatus for melting and dispensing thermoplastic material comprising a hopper, a grid melter, a reservoir and a pump. The novelty of this application resides in a novel method and apparatus for forcing molten material into the pump inlet. The infeed is accomplished by a pair of counter-rotating shafts to which the molten material is supplied and from which it is sheared by a pair of inclined surfaces. In the process of being sheared from the counter-rotating shafts the molten material is forced into the pump inlet.

Abstract: A fluid-pressure operated actuator arrangement has a double-acting actuator device and a control valve. A three-element differential mechanism has two of its elements respectively drivingly connected to the control valve and the actuator device, and a third element resiliently coupled to an input lever. The input lever is frictionally restrained against movement. Relative movement between the lever and the third element, induced as a result of jamming the control valve, brakes the third element, increasing a torque which can be applied by the actuator device to the valve.

Abstract: An inner component of the fluid machine has an outer circumferential surface, and an outer component has an inner circumferential surface which eccentrically surrounds the outer circumferential surface. One of the components is rotatable relative to the other component. The inner component is formed with at least two pair of diametrically opposite guide slots each having an outer end open at the outer circumferential surface and an inner end, the inner ends communicating with one another and each of the guide slots receiving a sliding vane. The sliding vanes in the respective diametrically opposite guide slots are biased apart by at least one biasing spring located between inner ends of the guide slots.

Abstract: A pneumatic vane motor comprising a cylinder and a vane carrying rotor. The vanes are reciprocably guided in radial slots in the rotor, which slots have a width exceeding the thickness of the vanes. For preventing the vanes from seating flatly on the slot walls they are provided with projection protruding from their both faces at a distance from their inner edges. Thereby, the projections are protected from wear as the vanes, during load transmission to the rotor, reciprocate in the slots.

Abstract: An improved positive displacement motor suitable for use in downhole drilling at the end of a drill string and driven by fluid, e.g., liquid mud, under high pressures. The motor has a novel arrangement of inlet and outlet ports in longitudinally extending circumferentially spaced rows for providing fluid at a substantially uniform pressure along substantially the length of the blades driving the motor so as to equalize the driving torque along the length of the rotor and avoid pressure differentials tending to twist the blade. A continuous ring isolates the adjacent rows of inlet and outlet ports.

Abstract: A method and apparatus for controlling speed and torque of hand held air driven vane type motors is available in several embodiments. For example, one embodiment is used in tool and die work and another embodiment is used in dental work. In reference to the latter, a foot operated control regulates the speed of an air driven handpiece, driving in turn various tools such as cutters and drills as they are generally used in a dental laboratory, by regulating the flow of compressed air both to and from the handpiece. Application of an operator's foot pressure on a floor level foot control, simultaneously depresses two valves which control the flow of compressed air. One valve controls the flow of compressed air from its source to the handpiece, and one valve controls the release into the atmosphere of compressed air from the handpiece.

Abstract: The present invention refers to a machine with rotary articulated pistons, which work within a cylindrical chamber. The machine could equally be a motor, compressor or pump to achieve transformations of energy.

Abstract: A rotary combustion engine having a completely die cast aluminum housing assembly wherein one of two end housings is rigidly secured and sealed to one open end of an outer barrel housing in which either one rotor housing or two or more rotor housings separated by an intermediate housing are radially confined. The other end housing is secured and sealed to the other open end of the outer housing to clamp the radially confined housing or housings with a predetermined load within the tolerance stack-up of the clamped parts. With this arrangement the outer housing grows with the clamped parts in the axial direction as a result of heat expansion during engine operation to prevent an excessive change in the clamp load while good sealing is maintained.