Abstract: A sealing system of rotary piston machines, the rotor excludes rotor discs which are arranged next to one another, and which are seated on the common rotor axle and are pressed apart from one another by acting spring and/or gas forces in the joints between the discs in such a way that the end sides of the discs which point towards the side walls of the housing bear sealingly against the latter and thus prevent the access of the medium to the axles. Assemblies comprising movable shaped lamellae which adapt to the changing joint widths and prevent an inner flow around the rotor are present in the part joints between the discs.

Abstract: A rotor of a rotary internal combustion engine, with each of the end faces having at each of the apex portions a recess defined therein in communication with the at least one apex groove, an end seal received in the recess in sealing engagement with the apex seal of each of the at least one apex groove, a first seal member in sealing engagement with the end seal and with the face seal of the face groove defined between the apex portion and a first one of the adjacent apex portions, and a second seal member in sealing engagement with the end seal and with the face seal of the face groove defined between the apex portion and a second one of the adjacent apex portions.

Abstract: In one aspect, there is described a rotor of a Wankel engine including a plurality of apex seal members each biased by a respective spring, each spring including an axial action portion and a radial action portion, the axial action portion including at least two radially extending band sections with adjacent ones of the band sections being connected by a fold, one of the band sections contacting a radially extending surface of the apex seal member and another of the band sections contacting a radially extending element of the rotor body, and the radial action portion forming a major part of a length of the spring, contacting an axially extending surface of the apex seal member in two spaced apart locations, and contacting the rotor body between the two spaced apart locations.

Abstract: An alloy suitable for use in a rotor, such as one or more regions of a steam turbine rotor, as well as a forged rotor formed with the alloy. The alloy consists of, by weight, 0.20 to 0.30% carbon, 0.80 to 1.5% chromium, 0.80 to 1.5% molybdenum, 0.50 to 0.90% vanadium, 0.30 to 0.80% nickel, 0.05 to 0.15% titanium, 0.20 to 1.0% manganese, and 0.005 to 0.012% boron, the balance iron, optionally low levels of other alloying constituents, and incidental impurities.

Abstract: A sealing strip is provided for sealing a space between two parts of a machine, for example, a rotary engine. The two parts form a groove for receiving the sealing strip. The sealing strip includes a filler piece, at least one spring element, at least one sealing body and a separating element. The filler piece is divided into two filler piece parts along the longitudinal direction. The filler piece parts are capable of independent longitudinal displacement with respect to one another. A spring element is arranged between the filler piece parts for preloading the filler piece into the groove. Each sealing body is formed in a frame-like shape for surrounding an end of the filler piece. The separating element is arranged between the filler piece parts for separating the filler piece parts and extends longitudinally from an end of the divided filler piece to at least a point where a sealing body surrounds the divided filler piece.

Abstract: A rotary engine comprises a rotor 14 rotating within an oval chamber 10 for rotation about an axis fixed with respect to the chamber. The rotor 14 has radial slots 19 receiving respective vanes 18 which are urged radially outwardly to make sealing engagement with the oval peripheral wall of the chamber 10. To ensure good sealing of the ends of each vane with respect to the end walls of the chamber 10, each vane 18 is of multi-part construction comprising end parts 50 for cooperation with the chamber end walls and an intermediate part 52. In one embodiment the intermediate part 52 and end parts 50 have cooperating inclined ramp faces such that an outwardly directed force applied to the part 52 by centrifugal force or by a biassing spring will cause the end parts 50 to be thrust laterally, by a wedging action, into sealing contact with the adjoining end walls.

Abstract: Apex seals are installed in slots in the apexes of a rotor in a rotary engine. Each apex seal assembly includes an outer sealing member, an inner support member, a pair of side or end members, a pair of hollow cylindrical slotted corner seal members mounted in the corner recesses, a pair of solid cylindrical resilient inserts mounted in the corner seal members and a pair of underseal springs to urge the seal members outwardly towards the running surface. The apex seal and its slot are tilted with respect to the rotor lobe centerline. The sealing and support members have mating inclined surfaces which form an inclined interface which is spaced entirely outside of the outer cylindrical surface of the corner seal member.

Abstract: An apex seal structure of two-piece construction including a main or sealing piece and an under or support piece which are disposed in a sealing groove in a rotor apex portion with a superposed relationship with each other. The main piece has a bottom surface which is in engagement with the top surface of the under piece, the bottom surface of the main piece being perpendicular to the side surfaces thereof, and the top surface of the under piece to the side surfaces thereof. In order to prevent inclination of the main piece in the sealing groove, the gap between the main piece and the sealing groove is decreased. For the purpose of avoiding any delay of induction of gas pressure behind the pieces, the width of the under piece is decreased with respect to that of the main piece so that an adequate gap is provided between the under piece and the sealing groove.

Abstract: Rotary piston engine having a substantially polygonal rotor provided at each apex portion with an apex seal and corner seals. The corner seal is so arranged that it is forced under the gas pressure introduced in a space behind it toward the side housing. A filler member comprised of a non-rigid material such as a heat resistant rubber or a suitable composite material is provided in a clearance between the corner seal and an adjacent end of the apex seal so as to prevent gas leakage through the clearance.

Abstract: Gas seal characterized in that a groove is formed on a rotor or on a sealing piece slidably embedded in the rotor. An apex seal, outwardly urged in the radial direction, is slidably inserted in the groove and both ends of the apex seal are so supported by a corner seal block that the apex seal does not slip out of the rotor. At the same time the seal block assures air-tightness of the rotor ends, thereby effectively sealing the rotor against the housing.

Abstract: A rotary internal combustion engine is disclosed having an apex seal assembly of the type that allows for lateral length adjustment. The assembly has an unexposed seal body portion received in a slot of the rotor, the body portion has a depth at least three times the height of the seal crown (exposed portion of seal) and is configured relative to the slot to provide a gas flow throat area to the underside of the body which is critically regulated. Grooves are defined in the leading and trailing sides of the unexposed body to reduce body portion mass by at least 20%, to reduce the uninterrupted body side wall contact area with the slot side wall by at least 40% thereby to increase unit sealing pressure and to create lands along the sides of said unexposed body portion which are short in depth to create a short flow throat equal to or less than 0.04 inch in depth.

Abstract: A rotary piston engine in which the housing has an opening in at least one end wall that is controlled by the piston. The end seals on the piston and the sealing bolts at the juncture thereof are located radially inwardly from the opening, while the corner seals of the piston have legs at the ends of the piston extending to the sealing bolts. The corner seals are disposed in planes which in the radially inward direction diverge from the radial planes of the piston passing through the corners of the piston.

Abstract: The improved apex seal assembly for a rotary piston of multi-corner profile having a plurality of contiguous peripheral surfaces intersecting at apex portions comprises a seal blade means receivable in a radial slot in each apex portion and an intermediate seal pin means for each apex portion and disposed in and rotatable relative to a bore communicating with the slot. The intermediate seal pin means is so formed as to have a sealing edge portion. A spring is located to exert a force on the intermediate seal pin means offset from its longitudinal axis so as to urge the intermediate seal pin means to rotate in a direction to maintain the sealing edge portion thereof into engagement against the seal blade means regardless of the amount and changes in differential gas pressure across the seal blade means.

Abstract: In rotary piston engines including apex seals each comprising a main body constituting a substantial part of the seal, an end piece disposed in abutting relationship to an end of the main body through slanted cam surfaces which serve to force the end piece axially outwardly to engage with the inner surface of the side housing when the end piece is resiliently biased radially outwardly by spring means, the method of assembling the apex seals in the rotary piston engine, which comprises providing a projection of consumable material between the main body of each seal and the spring means so as to retain the spring means preventing the end piece from being displaced over the end face of the center housing, the consumable material being of such a type that dissipates under heat produced during engine operation.

Abstract: The invention pertains to a rotary machine embodying as major elements a dual rotor consisting of two rotor halves rotating in a circular housing and an oscillator comprised of a cascade of elliptical gears. The periphery of the housing is adapted, with respect to intake, outlet and other necessary means, to suit the purpose for which the machine is intended. The dual rotor has an even number of vanes shaped to best suit the purpose of the machine. Half of the vanes are located on each rotor half in such a manner as to be able to rotate with the rotor halves in the circular housing and to oscillate with respect to each other creating working chambers of varying volume while rotating in the same direction. The oscillations are imposed by the oscillator which includes an input-output shaft integrated with a pair of elliptical gears in the center of the cascade. The space between the dual rotor and the housing and between the respective rotor parts is sealed by a suitable sealing system.

Abstract: An improved corner seal for rotary mechanisms, such as trochoidal or slant axis rotary mechanisms. The mechanism includes a housing defining a chamber with a rotor movable therein. The rotor includes a piston seal receiving bore and a piston seal is received in the bore and sealingly engages one wall of the chamber. An apex seal receiving groove is located in the rotor and intersects the bore. An apex seal is received in the groove and sealingly engages another wall of the chamber. A ring-like expander seal is within the bore and sealingly engages the piston seal and the bore when gas under pressure is directed to the bore from the groove.

Abstract: A multi-stroke engine for converting energy into torque is described including two rotors and a housing along surfaces of revolution of genus 1 about same axis. In the preferred configuration a cavity of revolution is used, generated by the revolution of a rectangle about the axis, two sides of the rectangle being parallel to the axis; one half of the cylindrical surface generated by the side nearest the axis is allocated to each rotor, while the surface generated by the other three sides of the rectangle is allocated to the housing. n substantially similar diaphragms having azimouthal thickness substantially equal to 90/n.degree. extend from each rotor at azimouthal angles 360/n across the cavity of revolution and are interleaved with the diaphragms of the other rotor so that the diaphragms divide the cavity of revolution in 2n chambers the volume of half of the chambers increasing while the volume of the others is equally decreasing as the rotors are pressured to rotate with respect to each other.

Abstract: An improved slant axis rotary mechanism including a housing defining an operating chamber, a shaft journalled in the housing having an angularly offset portion within the chamber and a rotor within the chamber and journalled on the angularly offset portion. The rotor has an annular flange provided with plural apices on each side thereof. Peripheral seals are carried about the periphery of the flange and sealingly engage the housing. At each apex there is a generally radially extending groove and an apex seal is loosely carried in each such groove and sealingly engages the housing. A bolt seal is carried at each apex on the periphery of the flange and sealingly engages the housing. Each bolt seal has a first pressure-responsive surface in fluid communication with the corresponding groove and a second pressure-responsive surface in fluid communication with the side of the flange opposite the corresponding apex.

Abstract: A rotary combustion engine apex seal arrangement comprising two end-to-end apex seal segments forced by a spring biased central wedge to engage a peripheral wall at their outer sealing surfaces and also to engage the respective adjoining side walls at their outer ends thereby leaving a gap only between their inner ends.

Abstract: An improved corner seal for rotary mechanisms, such as trochoidal or slant axis rotary mechanisms. A rotor is provided with a piston seal receiving bore and the piston seal is received in the bore to be carried by the rotor and sealingly engage a wall of the mechanism operating chamber. A first seal receiving groove is disposed in the rotor and intersects the bore and a correspondingly dimensioned first seal receiving groove is located in the piston seal to be substantially centered with the first groove in the rotor. A first seal is received in the grooves. A second seal receiving groove is located in the rotor and intersects the bore at an angle to the first seal receiving groove. A second seal receiving groove is disposed in the piston seal and is only nominally centered with the second seal receiving groove in the rotor. It is also substantially wider than the second seal receiving groove in the rotor.

Abstract: A unitary apex seal assembly for rotary engines. The assembly includes a pair of spaced bolts each adapted to engage a respective side wall of the rotor-containing chamber of the engine. Each bolt has a generally radially extending slot, and each slot includes an enlarged seal-retaining portion. A spring is interposed between the bolts and connected to both, and is further adapted to urge the bolts away from each other when installed in a rotary engine. An apex seal is received in the slots of both of the bolts, and includes an enlarged section within the enlarged seal-retaining portion of each of the slots. The seal is provided with a raised surface located between the bolts for precluding substantial axial relative movement between the bolts and the seal, so that the seal and appurtenances can be installed within a rotor as a single assembly.

Abstract: A multi-piece apex seal for a rotary engine in which the seal includes a main seal piece and corner seal piece at one or both ends of the main seal piece and in which at least one of the adjacent engaging surfaces of the main seal piece and a corner seal piece is arcuate to insure a flat fit between the corner seal piece and the adjacent housing end wall.

Abstract: Rotary piston type internal combustion engine including corner seals adapted to be received in corner seal recesses provided in each corner portion of a rotor, said corner seal comprising a substantially cylindrical body, an axial bore of circular cross-section axially offset from the axis of the body, and a substantially radially extending slot provided in the body at the side opposite to the direction of offset of the bore so as to define a substantially C-shaped cross-section of varying wall thickness. The configuration of the corner seal is effective to provide it with radial resiliency and also ensure uniform contact pressure against the wall surface of the recess throughout the periphery thereof.

Abstract: The junction seals at one side of the rotor of a rotary engine are integral parts of the rotor.

Abstract: A radial seal for a rotary piston internal combustion engine, especially of trochoidal construction, which is constituted by a sealing bar, possibly of multi-partite construction, that is guided in an axially parallel groove of a piston and is forced radially outwardly by springs; the springs are thereby arranged separate from one another in series one behind the other--as viewed in the longitudinal direction of the groove.

Abstract: A rotary machine multi-piece apex seal arrangement having two arcuate main body segments with sliding tongue and slot engagement which are biased to pivot in opposite directions to engage an internal peripheral wall of the machine by a single spring that is positioned by a bar sliding on this wall and also having end segments that are wedged against the main body segments by the same spring to engage oppositely facing end walls in the machine.

Abstract: The corner seals and apex seals in a rotary engine are structured to permit coil springs to be concentrically arranged with and bias the corner seals.

Abstract: An inexpensive rotor and cooperating sealing grid for trochoidal rotary engines, in which the gas seals at each side of the rotor are simple circular elements interlocking and coacting with the sealing elements at the rotor apexes, whereby the chambers of variable volume formed between the rotor working faces and the housing are isolated from each other and from axial leakage of gas, the circular gas seals also serving as oil seals between the rotor and the housing side walls.