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: A rotary positive displacement pump has a front-loading seal arrangement to better accommodate servicing and cleaning of the pump body. The pump includes a sliding seal subassembly disposed in a volume between a central portion of a rotor that is received on a shaft of a gear case and the hub of the pump body. A related method of modifying a rotary positive displacement pump enables the transformation conventional pumps with a rear-side seal arrangement to be transformed into a pump having a front-loading seal arrangement. In addition to the reduction of a dead zone in which turbulent flow does not occur by inclusion of the sliding seal subassembly, other modifications to the pump body to improve the ability of the pump to be cleaned in place.

Abstract: Corner seal sockets (26) are formed at the end of apex seal slots (58) formed in a rotor (10). A twisted split washer spring (70) is positioned in each socket (26) between the base wall (28) of the socket (26) and the inner end of the corner seal (16). The springs (70) bias the outer end surfaces of the corner seals (16) against the inner side surfaces of the housing sidewalls (20, 22). A radial apex seal slot (32) is formed in each corner seal (16). The base (38) of each slot (32) is substantially semi cylindrical in shape. It and the cylindrical peripheral surface (44) of the corner seal (16) form an arch shaped bight that connects side portions of the corner seals (16) together. End portions of the apex seals (18) extend into the apex seal slots (32) in the corner seals (16). The end portions of the apex seal biasing spring (60) contacts spring abutments (52, 54) which project radially inwardly from the outer ends of the apex seal (18).

Abstract: Corner seal sockets (26) are formed at the end of apex seal slots (58) formed in a rotor (10). A twisted split washer spring (70) is positioned in each socket (26) between the base wall (28) of the socket (26) and the inner end of the corner seal (16). The springs (70) bias the outer end surfaces of the corner seals (16) against the inner side surfaces of the housing sidewalls (20, 22). A radial apex seal slot (32) is formed in each corner seal (16). The base (38) of each slot (32) is substantially semi cylindrical in shape. It and the cylindrical peripheral surface (44) of the corner seal (16) form an arch shaped bight that connects side portions of the corner seals (16) together. End portions of the apex seals (18) extend into the apex seal slots (32) in the corner seals (16). The end portions of the apex seal biasing spring (60) contacts spring abutments (52, 54) which project radially inwardly from the outer ends of the apex seal (18).

Abstract: A rotary engine in which rollers are inserted between the side wall of a seal groove and an apex seal such that the side wall of the seal groove and the apex seal are brought into rolling contact, the rollers are enhoused within a recessed groove formed in the side wall of the seal groove or in the side surface of the apex seal, and both ends of the recessed groove are enhoused in the corner seals assembled at both ends of the rotor so that the recessed groove is sealed.

Abstract: An apex seal for rotary piston engines which comprises an elongated sealing piece and an elongated support piece which are superposed throughout their lengths. A side piece is provided at one end of the superposed pieces and has an inclined inward surface which is engaged with a correspondingly inclined end surface of the sealing piece but spaced from a correspondingly inclined end surface of the support piece. A spring is provided for urging the support and side pieces toward the inner wall of the rotor housing.

Abstract: A rotary combustion engine apex seal arrangement comprising two end segments forced by a spring biased wedge shaped central segment arranged therebetween 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 which is substantially filled by the tip of the central segment.

Abstract: A rotary piston machine of the type having a slant or precessing rotor or the type having a parallel axis rotor, such as a Wankel engine, having a rotor seal grid formed from peripheral and apex seals which are connected together at their adjacent ends by connectors, often called bolts, located in sockets in the rotor. An arcuate seal extends peripherally around each bolt in the manner of a piston ring between the peripheral surface of the bolt and the adjacent peripheral wall of the socket in which the bolt is located, to effect sealing between the peripheral walls of the bolt and the socket without inhibiting relative movement of the bolt in the socket.

Abstract: A corner seal member for use in a rotary internal combustion engine is constructed with an apex seal groove and an elongated cavity. The elongated cavity forms a thin wall having a substantially semicircular cross-section in the opposite side of the apex seal groove. The gas pressure delivered into the elongated cavity is advantageously used for urging the corner seal towards the inner surface of the corner seal groove, thereby preventing the gas pressure from leaking into an adjacent working chamber.

Abstract: The sealing grid is for a rotary piston mechanism having a multi-profile rotor forming apex portions, which rotor is supported for planetary rotary movement in a housing cavity. The sealing grid comprises an apex seal assembly carried in each of the apex portions of the rotor, which assembly includes an apex seal blade. Also forming part of the sealing grid are apex seal pins disposed in the opposite side faces of the rotor and at each of the apex portions. The grid additionally includes side gas seal strips carried in each of the opposite side faces of the rotor. One end portion of each side gas seal strip is disposed in abutment against an apex seal blade at one apex portion while the opposite end portion engages the apex seal pin located at an adjacent apex portion. The grid further includes a biasing means for each side gas seal strip for urging the associated side gas seal strip in an endwise direction and into abutment against the apex seal blade associated therewith.

Abstract: A rotary piston machine of the type having a slant or precessing rotor or the type having a parallel axis rotor, such as a Wankel engine, having a rotor seal grid formed from peripheral and apex seals extending around surfaces of the rotor and together defining closed working chambers in a housing in which the rotor is rotatable, adjacent ends of the seals being connected together by connectors, often called bolts, located in sockets in the rotor. Each bolt has clearance laterally of its longitudinal axis from the peripheral wall of the socket to permit lateral movement of the bolt in the socket except in one direction laterally of the longitudinal axis of the bolt, in which direction, movement of the bolt is restrained by the bolt being held between fixed laterally opposite positions engaging its peripheral surface.

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.