Abstract: An ultrasonic bonding equipment for manufacturing a semiconductor device comprises a tip portion. The tip portion has a top surface which is faced to a member to be bonded, and propagates an ultrasonic vibration to the top surface. A plurality of protruding portions are provided on the top surface. Each of the protruding portions has: a first pair of opposite side surfaces inclined with respect to the top surface; and a second pair of opposite side surfaces substantially vertical to the top surface. A semiconductor device comprises: a semiconductor chip; a lead; and a bonding strap electrically connecting the semiconductor chip and the lead. A recess is formed on an upper surface of the bonding strap in at least one of a first region where the bonding strap and the semiconductor chip are connected and a second region where the bonding strap and the lead is connected.

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: Apertures through each face of a planetary rotor, volutes for low loss delivery and collection of fluid to and from the working volumes of a planetary rotary pump, compressor, or turbine, and zero clearance seals by using continuous carbon fiber reinforced polyetheretherketone (PEEK) or other self-lubricating materials significantly improve the volumetric flow rate of such rotary pumps compressors or turbines. By establishing a means to vent each working volume to an intake or exhaust port at arbitrary rotor positions, apertures linking working volumes to intake or exhaust ports allows each working volume of a multilobe planetary rotary pump to function independently near peak volumetric efficiency.

Abstract: A piston machine usable as an expansion engine, suction pump or compressor for a compressible medium has a housing containing a working space with two parallel walls and an interconnecting peripheral wall perpendicular to the parallel walls, the peripheral wall having a first chamber surface. A piston has a second chamber surface cooperating with the first chamber surface to form a chamber of variable volume. Two identical crankshafts rotatably mounted in the housing have crank pins rotatable in and supporting the piston, the crankshafts being coupled together for angular synchronous rotation. A first sealing element is mounted on the piston and a second sealing element is mounted on the peripheral wall. Each of the first and second chamber surfaces is formed as a sliding surface to slidingly engage the sealing element of the other of said chamber surfaces during piston rotation.

Abstract: A rotary internal combustion engine includes a rotor with apex seals installed in slots which extend axially through apexes of the rotor. Each slot has stepped side walls which define an inner narrower slot portion and an outer wider slot portion. The portion are joined by a pair of outwardly facing ledges on both sides of the slot. Each apex seal has a outer head which includes a pair of overhanging or cantilevered lips. The width of the overhang is slightly larger than the width of the ledges so that seal-slot contact is made near the outer seal tip.

Abstract: A rotary engine is disclosed which comprises a rotor housing, a rotor fitted in the rotor housing so as to define a plurality of operating chambers in cooperation with the inner wall surface of the rotor housing and produce a planetary rotation of itself inside the rotor housing, apex seal members severally accommodated inside seal grooves formed at the apexes of the rotor along the axis of rotation of said rotor, and pressure means disposed between the respective apex seal members and the rotor so as to press the apex seal members against the inner wall surface of the rotor housing by virtue of the pressure of a gas emanating from the operating chambers.

Abstract: A radial seal for a rotary piston engine having a trochoidal-shaped casing inner surfacing and a multi-corner piston with which sealing strips are arranged in radial grooves in the corners of the piston. The sealing strips engage under pressure of the operating chambers against the casing inner peripheral surfacing and respectively against the lower-pressure-side groove wall. The sealing strips have perforations or openings between the sealing surfaces coming into engagement along the groove walls. Filler pieces are inserted or installed with nominal clearance in the perforations or perforations in the sealing strip. These filler pieces are narrower in peripheral direction in the dimensioning or measurement thereof compared with the sealing strip. A spring holds the filler pieces in continuous engagement against an upper part of the sealing strip. Groove clearance of the sealing strip amounts to a value in a range of 0.04 to 0.

Abstract: A radial seal of a rotary piston engine with trochoidal-shaped casing inner peripheral surfacing and multi-corner piston, with which sealing strips are arranged in radial grooves in the corners of the piston. The sealing strips under pressure of the operating chambers of the rotary piston engine engage against the casing inner peripheral surfacing and respectively against under-pressure-side groove wall configuration. The sealing strip along a radial underside thereof has a narrow, deep groove extending parallel to the sides of the sealing strip. A sheet-metal strip is installed with nominal clearance in this first meshing groove and the sheet-metal strip projects beyond the groove. A groove spring for the sealing strip is inserted or installed in the base of this groove.

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: Corner seal for rotary piston engines comprising a substantially cylindrical body which is formed with a groove for accommodating an end of the apex seal. The corner seal has an end surface adapted to be brought into a slidable engagement with the inner surface of a side housing. The end surface of the corner seal is formed with a recess so that the area of the sliding surface is decreased to 45 to 75% of a sum of the area of the sliding surface and the area of the recess.

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 radial engine having an engine casing supporting for rotation therein a central drive shaft and having mounted thereupon a rotator drivingly afixed to said shaft, at least two combustion apertures provided along the circumferential edge of the rotator and in alignment with complimentary apertures provided within the engine block for mating with said rotor apertures. At least two axially reciprocal pistons for compressing the fuel within said engine combustion chambers, at least one intake valve with each combustion chamber, and a slotted piston cam drivingly engaged on said central shaft and associated by cam follower mechanism with said reciprocal pistons. Appropriate exhaust ports are provided within the engine block and spaced at least a rotor combustion chamber width away from the combustion chambers and in alignment with the combustion chambers in said rotator. Intake valve cam structure also appropriately arranged for drive from the central shaft.

Abstract: An improved apex seal construction for slant axis rotary mechanisms. The mechanism includes a housing defining a chamber having radially inner and outer spherical walls interconnected by opposed, generally radially extending side walls, a shaft journalled in the housing and having an angularly offset portion within the chamber, a rotor within the chamber and journalled on the angularly offset portion. The rotor has a spherical hub and a peripheral, radially outwardly extending flange having plural apexes on each side thereof, each apex being provided with an apex seal receiving groove extending radially the length of the flange and into the hub. An apex seal is loosely received in each groove and extends therefrom to sealingly engage a corresponding one of the side walls.

Abstract: The improved seal grid assembly is for a rotary compressor or expansion engine of the type having a rotor supported for planetation in a multi-lobe housing cavity and comprises, in combination with a non-rotating seal at the juncture of the housing lobes, a sealing means including a sealing surface movable between a retracted position where it is out of engagement with the peripheral wall and an extended position where it is in engagement with the peripheral wall of the housing cavity. A vent passage means is also provided in the rotor to communicate a space defined between the sealing means and rotor with the working chambers to conduct gaseous fluid which pressurizes said space so as to provide movement of the sealing surface of the associated seal means to the retracted position just prior to engagement with the non-rotating seal and to the extended position after such engagement with the non-rotating seals at each of the housing lobe junctures.

Abstract: Seals for providing sealing contact between the rotary piston and the apexes of the casing of a rotary type combustion engine, compressor, or pump for sealing the several pressure chambers, one from the other or others, during operation. The seals are disposed in radially formed slots at each apex of the housing and are so constructed to permit pressure in the chamber being pressured to be communicated to the rear side of the seal, or the side opposite that which makes sealing contact with the rotary piston, so that such pressure acting on the rear side may assist the spring normally acting against the same side in forcing the seal against the rotary piston with greater pressure and thereby provide a better sealing effect.

Abstract: An improved rotary mechanism including a housing defining an operating chamber, a shaft journalled in the housing and extending through the chamber, and a rotor having plural apices journalled on the shaft and within the chamber. The rotor includes apex seal receiving grooves at its apices and piston seal receiving bores intersecting the grooves. Apex seals are disposed in the apex seal receiving grooves while piston seals are disposed in the bores. Balance pistons are disposed within the bores and abut the associated piston seals adjacent the point of intersection of the bores and the grooves and fluid passages establish fluid communication between the bores and a portion of the rotor surface remote from the corresponding apex to provide for gas energization of the piston seals either by gas pressure directly against the piston seals or indirectly through gas pressure applied to the balance pistons for all cyclic stages of operation of the mechanism.

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: A rotary combustion engine having a planetary rotor and side intake ports is provided with an apex seal arrangement comprising two side-by-side seal members providing spaced sealing lines of contact at each rotor apex and wherein communicating grooves in the ends of the two apex seal members and existing corner seals connect the space between the apex seal members to the existing spaces between the side seals and oil seals on the rotor sides which periodically communicate with the side intake ports.

Abstract: An internal combustion engine including improved seals with longer wearing capability. The engine includes a housing having an interior wall defining a combustion chamber and a member movable within the housing, the member being subjected to hot gases of combustion. A sealing device is mounted on the member for movement therewith and establishes a seal between the member and the interior wall. The improved seal embodies at least one insulating member carried by the seal and in relation to resist heat transfer of heat from hot gases of combustion to the seal so that the seal will run at a cooler operating temperature to reduce wear. The invention may be employed in either reciprocating engines or rotary engines.

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.