Abstract: In a rotary engine comprising a casing defining an oval working chamber and a rotor mounted in the chamber, the rotor is mounted for simple rotation about the chamber axis and resilient sealing means are provided in the rotor to cooperate with the curved chamber wall to provide suction through an inlet port in the casing, compression and expansion, and exhaustion through an outlet port in the casing during rotation of the rotor.

Abstract: Rotary piston engine includes a substantially triangular rotor formed with flank cooling oil passages located behind flanks of the rotor. The rotor further has coolant oil passages behind the oil seals at the opposite side surfaces thereof. The flank cooling oil passages are supplied with cooling oil only when the rotor temperature or engine speed is beyond a predetermined value, while the oil seal cooling passages are always supplied with cooling oil so that the rotor flanks can be maintained at a high temperature while preventing the oil seals from being excessively heated.

Abstract: A rotary-piston machine, in particular a rotary-piston combustion engine of trochoid type is provided. The machine includes a housing composed of at least one shell and at least two parallel end pieces and is traversed perpendicular to the end pieces by an eccentric shaft mounted in the end pieces. A liquid-cooled polygonal piston is rotatably mounted on the eccentric of the shaft. The piston contains cavities provided with at least one aperture near their radially inner portion. The eccentric shaft has an axial bore traversed by the liquid and communicating by way of transverse holes with the bearing and with at least one nozzle. The orifice of the nozzle is directed at the aperture of the piston cavities. Controls are arranged in the axial bore of the eccentric shaft for controlling the communication between the axial bore and the nozzle according to the engine load and/or the temperature of the liquid.

Abstract: A rotor is operatively provided in a bore of a cylinder which is formed with an inlet and an outlet. The cylinder is enclosed by a housing with an annular chamber being defined between the cylinder and the housing. The housing has an inlet which is connected to the inlet of the cylinder. The outlet of the cylinder is provided at an upper portion thereof. An oil sump is defined by a lower portion of the annular chamber of the housing. A partition divides the interior of the housing into the annular chamber within which the cylinder is disposed and an outlet chamber which communicates with an outlet of the housing. The lower portion of the partition is cut away to communicate the annular chamber with the outlet chamber.

Abstract: Cooling a hot component such as a rotor of a rotary piston engine by passing a coolant liquid through a passageway defined between adjacent surfaces of the component and a plug inserted into a socket in the component, the plug being made of a material having greater thermal conductivity than that of the material from which the component is made and the cross-sectional area of the passageway being sufficiently small as to produce turbulent flow of the coolant through the passageway.

Abstract: The lubricant metering system is for a rotary piston mechanism of the Wankel type and provides for by-passing a predetermined amount of lubricant past the oil seal ring carried by the rotary piston. The by-pass is one or more radially extending recesses of small total flow area in the contact surface of the oil seal ring, each of the recesses being in the nature of a scratch.

Abstract: Disclosed herein is a rotary internal combustion engine comprising a housing including walls defining a rotor cavity having axially spaced sides, a rotor shaft rotatably supported by the housing, extending through the rotor cavity, and including an eccentric, a rotor rotatably supported on the eccentric and within the rotor cavity, which rotor includes equi-angularly spaced apexes which, together with the rotor cavity, define working chambers rotatable within the rotor cavity, which rotor also includes side seals engaging the rotor cavity sides to restrain leakage of pressure from the working chambers, meshed gears on the rotor and on the housing for causing rotation of the rotor on the eccentric and rotation of the rotor shaft relative to the housing, and a gas recirculation system extending, at least in part, in the housing and including means defining a closed gas recirculation path including a first path portion in the rotor, a second path portion in the rotor shaft, a third path portion located to receiv

Abstract: The fluid-cooled rotary piston for a Wankel-type mechanism has a plurality of intersecting flank surfaces to form a multi-sided profile and a hub portion by which it is supported for rotation on a mainshaft. The rotary piston also has a closed-loop passageway for each flank surface extending in close spaced relation to the side faces of the rotor and the intersection of the flank surfaces. An inlet passage is provided for each closed-loop passageway to conduct to the latter, as the rotary piston rotates, pressurized cooling fluid from a source thereof. An outlet passage is provided for each closed-loop passageway to conduct heated cooling fluid from the latter to an area adjacent the hub portion. The outlet passage may be provided with a restricted flow area to insure that the associated closed-loop passageway is maintained full of cooling fluid.

Abstract: A radial engine with a rotating cylinder block is disclosed which is capable of high rates of rotation although operating on the two stroke cycle. An intake air compressor and an exhaust driven turbine are provided, both in driving connection with the same output shaft as the cylinder block. A peripheral manifold serves both to provide the stator of the exhaust turbine and to mask exhaust passages from the cylinders in the block so as to modify the two stroke cycle of the engine by effectively advancing the end of the scavenge phase. A system for recovering oil from the block is disclosed, and the block is reinforced by a peripheral tension band.

Abstract: In the embodiment depicted, the system comprises a gas compressing arrangement of first and second rotary compressing stages with an intercooler and an aftercooler for condensing and removing moisture from the compressed gas product. In order to cool the gas compressor, generally, and the second-stage rotor shafts in particular, the cooled, de-moisturized, compressed-gas product is used. Thus, the second-stage rotor shafts are axially bored or hollowed, and a tube is supported within the bore. The tube is through-connected with the outlet of the aftercooler to admit the cooled, compressed gas product into the bore, and, in turn, the compressed gas product is discharged from the bore. Accordingly, the cooled, compressed gas product is cycled through the bore, constantly to cool the shafts all the while that the compressor is running, or under load.

Abstract: A rotary mechanism including a housing defining an operating chamber, a rotor journalled within the chamber, at least one seal receiving groove in the rotor, a seal within the groove, a spring within the groove and urging the seal into sealing engagement with the housing, a source of oil under pressure, and an oil conduit in fluid communication with the source and ending in an opening in the groove beneath the spring and positioned to be closed by the spring so that the spring additionally serves as a check valve opening to permit oil to enter the groove when oil under pressure is directed to the conduit and prevents pressurized gas from entering the conduit from the chamber.

Abstract: The built-up mainshaft has a plurality of eccentric elements secured to an elongated shaft element in end-to-end angular off-set relationship to each other. Each of the eccentric elements has integral cylindrical body and axially extending sleeve-like portions and an axially extending bore therethrough to receive therein the elongated shaft element. Each eccentric element is scored to render the cylindrical body portion thereof deformable in an inward direction toward the shaft element. A clamping means is provided for each eccentric element to coact with the scoring to effect deformation of the associated cylindrical body portion and secure the latter in torque transmitting relationship with the shaft element.

Abstract: Structure providing improved cooling of the rotor of a rotary engine. The cooling structure includes flow passages for passing a portion of the bearing lubricant through the apices of the rotor. Radially extending portions of the flow passages may be provided in the end walls of the rotor. Delivery of the bearing lubricant to the rotor flow passages may be at one end of the bearing or at a mid-portion of the bearing as desired. The flow passages may include passages in the apices of the rotor extending between the end walls thereof and communicating at their opposite ends with radial passages in the end walls. In one form, the passages in the apices communicate at one end with a radial passage to a rotor cavity having an axial passage therefrom through the end wall at that end.

Abstract: A system is shown for the positive, metered lubrication of the shaft and rotor surfaces in a mechanical vacuum pump. The pump has an end plate which receives the shaft in a cylindrical opening and a lubricant conduit is provided in the end plate communicating with that opening. At a location of the opening's cylindrical surface circumferentially spaced from the lubricant conduit, a recess is provided in that cylindrical surface, the recess extending to the end of that surface adjacent the conventional pump rotor secured to the shaft for rotation therewith. One or more recesses are provided in the shaft itself and each is axially alinged with both the lubricant conduit and a portion of the recess in the cylindrical surface. Thus, upon rotation of the shaft, the recess in the shaft itself receives lubricant from the lubricant conduit and deposits the lubricant in the first-mentioned recess.

Abstract: Improved structure for cooling the rotor of a rotary engine wherein a heat pipe structure is provided extending inwardly from an outer portion of the rotor for transferring heat inwardly to a heat transfer structure within the rotor. Heat is transferred through the heat transfer structure from the heat pipe to lubricant coolant flowed through a grooved wall inwardly of the heat pipe and outwardly of the rotor bearing. In the illustrated embodiment, the heat pipe is provided with a body of water for effecting the desired heat transfer from the rotor apex.

Abstract: An improved slant axis rotary mechanism including a housing defining a chamber, a shaft journalled in the housing and having an angular eccentric within the chamber and a rotor within the chamber and journalled on the eccentric. The eccentric includes a radially outwardly extending thrust collar located between the ends of the eccentric. The rotor includes a hub and a peripheral flange and is defined by a centerpiece including the flange and part of the hub and having a bearing pad embracing one side of the thrust collar. An intermediate piece is secured to the centerpiece on one side thereof and has a bearing pad embracing the other side of the thrust collar. A pair of covers each defining part of the hub, are respectively secured to the centerpiece and to the intermediate piece and partially cover the latter.

Abstract: A rotary mechanism including a housing defining an operating chamber, a shaft journalled in the housing and having an eccentric within the chamber, a rotor within the chamber and journalled on the eccentric, a timing gear carried by the housing and within the chamber and having a predetermined number of teeth, an internal ring gear carried by the rotor and meshed with the timing gear, the ring gear having a number of teeth greater than the predetermined number of the timing gear whereby a crescent-shaped gap between the gears exist. A crescent-shaped pad is carried by the eccentric within the gap and an inlet port is provided in the eccentric adjacent one corner of the pad for supplying hydraulic fluid to the gap. An outlet port is located in the eccentric adjacent the other corner of the pad for conveying pressurized hydraulic fluid to a point of use within the mechanism. The invention provides high pressure hydraulic fluid through unique use of the timing and ring gears necessary in such mechanisms.

Abstract: A rotary internal combustion engine comprising two intermeshing rotors provided with radially extending lobes and intervening grooves, the lobes of at least one of the rotors being provided with radially extending channels for supply and return of cooling liquid from and to, respectively, axially extending central channels of the rotor, said return channels being interposed between said supply channels and a heated surface portion of the lobes. The temperature difference between the cooling liquid portions in the radially extending channels being utilized for circulating the liquid under the action of the centrifugal forces arising during rotation of the rotors.

Abstract: An improved rotary mechanism such as a rotary engine. The mechanism includes a main shaft with a rotor supporting portion thereon. A rotor is journalled on the supporting portion and has a plurality of apices. Each apex is provided with a seal retaining groove and a seal is disposed therein. A plurality of hydraulic passages are provided in the rotor, one for each apex seal, and open from the rotor to the rotor supporting portion of the main shaft. The rotor is provided with suitable devices for transmitting hydraulic pressure applied in each of the passages to the corresponding apex seal to bias the apex seal out of the groove into good sealing engagement with the operating chamber walls. A hydraulic fluid conduit is located in the main shaft and has a port terminating in the rotor supporting portion. The port is disposed to be periodically, serially aligned with the passages in the rotor for timed biasing of the apex seals as desired.

Abstract: An improved means for lubricating the compression seals of rotary engines. The system is provided in a typical rotary engine having a housing with a main shaft extending through the housing and a rotor within the housing and journalled on the main shaft. The rotor includes a bore receiving the shaft. Conventional means are provided for supplying lubricant to the interface of the main shaft and the rotor at the bore. The rotor carries at least one compression seal and is provided with a lubrication conduit for the seal extending from the bore to a surface of the rotor adjacent the seal. During operation of the engine, relative rotation between the rotor and the shaft takes place and generates a pumping action at the interface to drive small amounts of lubricant through the lubrication conduit to the rotor surface to lubricate the seal.

Abstract: A rotary type engine is modified to be used as an air compressor and the air compressor is employed in an air cooling system. In the air cooling system, the air compressor supplies compressed air to a heat exchanger which reduces the temperature of the compressed air. The cooled compressed air is allowed to expand and cool within an expansion cavity of the compressor, and the rotation of the compressor forces the cooled air to emerge from an exit port in the compressor.

Abstract: The disclosure herein describes a vane-type rotary internal combustion engine which includes two separate housings, a compressor housing and a motor housing; each housing includes an interior profile of a first order configuration with constant diametrical chord. A rotor is rotatably mounted in each housing and includes a series of arc-shaped segments disposed in circular alignment in the housing and equally spaced to define therebetween a series of elongated radial openings. The rotor of each housing includes also a system of partially unbalanced vanes slidably mounted in these openings and bearing at each extremity thereof against the interior profile of the related housing; each vane defines in the housing chambers of variable volume depending on the relative rotational position of each segment with respect to the housing profile. Both housings are similarly structured with the exception that the compressor housing includes two sections of constant radius.

Abstract: A multi-rotor Wankel type rotary engine is disclosed having an intermediate or center bearing assembly for the eccentric shaft in addition to end bearing assemblies. The center bearing is split along a central plane for special assembly techniques. The indermediate housing, receiving the center bearing, is substantially hollow and has a sector interrupting the hollow interior to act as a support for one of the split portions of the center bearing. The portions are joined to the sector by a pair of bolts extending only through the sector and split bearing portions.