Abstract: A single inlet/outlet-tank U-shaped tube heat exchanger is disclosed comprising a tank having a header plate and a plurality of U-shaped tubes whose legs extend through and terminate with an open end at one side of the header plate. A first group of the tubes is arranged so that the two open ends of each of these tubes are located in one and the other of two outboard rows extending longitudinally of the header plate. A second and remaining group of the tubes is arranged so that the return bends of these tubes criss-cross those of alternate tubes in the first group and have their open leg ends all located in a third and inboard row extending between the two outboard rows.

Abstract: A turbocharged internal combustion engine is provided in which the exterior of one side of the engine block has a cavity formed therein. A head is secured to the block and overlies the cylinders formed therein. The head is provided with an internal intake passageway and an internal exhaust passageway for each cylinder formed in the block. One end of each intake passageway communicates with the cavity and one end of each exhaust passageway terminates at the exterior of the head in proximity to the cavity formed in the block. A heat exchange assembly is disposed adjacent the cavity and is provided with a housing which is mounted on the block one side and in overlying relation with the cavity. The housing is provided with an inlet and an outlet spaced therefrom. A heat transfer means is disposed within the housing and is located between the inlet and outlet thereof. The housing outlet communicates with the cavity.

Abstract: An oil pump using internal gearing, wherein the difference in number of teeth between the internal and external gears is one, and wherein the inner rotor is directly connected to the crankshaft of the internal combustion engine or to the transmission shaft. The inner rotor is formed from a trochoidal curve and tracking circle which the outer rotor is formed from a trochoidal curve theoretically ideal for the inner rotor but modified by having circularly arched inwardly curved portions so as to decrease confinement of the inner rotor and smooth the operation thereof.

Abstract: A vane-type rotary machine for use as a compressor, pump or the like. The rotary machine has a cam ring with an inner peripheral contour expressed by an epitrochoid-like curve having at least one lobe, a cylindrical rotor having a plurality of vane grooves and contacting the inner peripheral surface of the cam ring, and vanes slidably received by the vane grooves and adapted to slide on the inner peripheral surface of the cam ring as the rotor rotates. The inner peripheral contour of the cam ring is corrected or modified in accordance with the amount of offset of the vanes in such a manner as to suppress the lateral reactional force applied to the vanes thereby to reduce the friction loss during sliding of the vanes in respective vane grooves, while making the sliding movement of the vanes approach a movement in accordance with a sine wave curve, thereby to diminish noise, thermal loss and mechanical damage which are attributable to irregularity of movement of the vanes.

Abstract: This invention pertains to a heat exchange system having a space heating, a space cooling and an independent water heating cycle. During the space heating and space cooling cycles a refrigerant is used to transfer heat by circulating between a condenser/evaporator and a heat exchanger, the refrigerant being evaporated and condensed in the process. During the independent water heating cycle a third heat exchanger is used to condense the refrigerant. The heat removed by this exchanger is used for the evaporating of the refrigerant. A fourth heat exchanger is provided for water heating. Either water pumped from an outside source or outside air may be used as a heat source and sink.

Abstract: A rotary internal combustion engine having separately housed compression and power rotors, and wherein there is a pair of sealing rotors positioned adjacent to diametrically opposite peripheral edges of each rotor to form two sealed pressure chambers in each housing.

Abstract: An arrangement for transmitting torque between the two rotors of a two stage rotary vane pump, consists of a coupling element, which forms between engagements on opposing faces of the two rotors, a connection which permits two degrees of freedom between the two rotors in the plane perpendicular to the rotor axis.

Abstract: In dissipating heat from miniature electronic devices, circuit modules, or the like, and particularly from dual-in-line package (DIP) type units having leads depending from opposite sides of a thin molded rectangular-parallelpiped body, an elongated sheet-metal strip of heat-radiating elements disposed above and in spaced relation to the top of the package has its opposite ends integrally connected with separate spaced heat-conducting clip members are cantilevered from it in different directions to fit respectively about the top and bottom surfaces of the package and to flex so as to accomodate insertion of the package between them and yet adjust themselves into abutments with those surfaces. Heat conducted away from the package by each of the cantilevered members first reaches a different end of the strip of heat-radiating elements, without interfering with the heat-exchange taking place along the opposite surfaces of the package clipped between the members.

Abstract: A vane-type rotary machine suitable for use as a compressor, pump or the like, having a cylinder provided with an inner peripheral contour expressed by an epitrochoid-like curve having at least one lobe, a cylindrical rotor contacting the inner peripheral surface of the cylinder and having a plurality of vane grooves, and vanes slidably received by respective vane grooves. The inner peripheral contour of the cylinder constituted by the epitrochoid-like curve is divided at the circumferential mid point of each of the portions where the distance between the rotor and the cylinder is minimized, and the curve is contracted in the circumferential direction by a predetermined angle to form a discontinuity corresponding to the predetermined angle. Both end points of the discontinuity is connected by an arc of the same radius as the rotor.

Abstract: A portion of the endless camming surface of the pump housing, which performs one cycle of suction, compression, and discharge of fluid in cooperation with the vanes and the rotor, includes an increasing radius portion and first through fourth decreasing radius portions successively arranged in the advancing direction of the vanes. These camming surface portions have such cam profiles that with movement of each vane, the amount of protrusion of the vane gradually increases along the increasing radius portion, and gradually decreases along the decreasing radius portions, the receding speed of the vane gradually increasing along the first and third decreasing radius portions, and gradually decreasing along the second and fourth decreasing radius portions. The cam profiles may preferably vary along quadratic curves.

Abstract: The heat exchanger according to the invention comprises extremely flat oval-shaped tubes (3) extending in a mutually parallel and spaced-apart relationship and are connected on their narrow side to manifold pipes (1,2) for forward and return flow. To ensure a sufficiently stable mechanical connection between the pipes and a satisfactory supply and discharge of the heating medium from the manifolds to the flat tubes as well as in the reverse direction, a trough (5) is formed by material removal in the manifold pipes (1a, 2a) thus creating a connection aperture (6) in the wall of the pipe. The flat tube (3a) is fitted into this trough (5) with its rim on the narrow side, to ensure a solid stable welded joint between the pipes. The flat tube (3a) is provided on its narrow side with a bore serving as a connection aperture (7), which comes to lie centrally against the connection aperture (6) in the manifold (1a, 2a).

Abstract: There is disclosed a scroll-type machine specifically suited for use as a gaseous fluid compressor. The machine has intermediate relief valve means providing variable pressure ratio characteristics to thereby improve efficiency, as well as protect against overcompression.

Abstract: The drive and driven gears of a pump are formed with grooves extending inward from the tips of the teeth to inside the root diameter. Thus each gear is divided into a first portion which serves solely as a drive or driven gear and a second portion which serves the two functions of a conventional pump gear, mainly to perform the pumping function and part of the drive function. Fitting within the grooves of both gears is a suction shoe which also overlies the inlet duct of the pump block and the mesh points of the first portions of the gears plus about two teeth to either side of the mesh point. The shoe separates the large portion of the pump chamber from the inlet duct.

Abstract: In a refrigerant compressor for use in an air conditioning system, a lubricating oil-separating device is mounted in the discharge pressure chamber communicating with pump outlets of the pump assembly and also with the discharge port. The lubricating oil-separating device comprises a plurality of tubes vertically disposed in a direction traversing flows of compressed refrigerant. The tubes each have at least one recess formed in a portion of its peripheral surface facing downstream of the compressed refrigerant flow, and an opening formed in the recess and communicating with the interior of the tube, whereby compressed refrigerant in the form of von Karman's vortices formed immediately downstream of the tube is introduced into the interior of the tube to thereby effectively separate the lubricating oil from the refrigerant.

Abstract: A drive shaft (26) of a gear type fuel pump (2) forms a driving interconnection between an engine gearbox (4) and a shaft (14) which carries the driving gear (10) of the fuel pump. The drive shaft has a slightly diverging lubricant supply passage (65) which receives lubricant from an oil jet (70) in the engine gearbox and directs the lubricant to the engaged splines (44, 46) at the inboard end of the drive shaft. Lubricant from the area of spline engagement is returned to the gearbox via radial passage (78), annular lubricant return passage (68) and radial passage (80). O-ring seals (82, 84) on the drive shaft, which straddle a drain passage (86) prevent the mixing of the lubricant and the fuel which may envelop an intermediate portion of the drive shaft. Wear of the engaged, oil lubricated splines (40, 42) at the outboard end of the drive shaft should provide a general indication of spline wear at the inboard end of the drive shaft because both ends are exposed to similar lubrication.

Abstract: An internally axed crankless piston engine wherein a piston rotor has at least one piston which moves through a circular annulus defined between a fixed inner casing and a fixed radially outer casing. A stopping piston is provided which defines the terminus of the annulus at one point on its circumference and an inflow duct issues into the annulus via an opening in the fixed inner wall of the inner casing or is arranged in the fixed radially outer casing wall adjacent to the stopping rotor while adjacent to the stopping rotor an outflow duct is provided in a fixed radially outer facing wall of the outer casing.

Abstract: A rotary piston compressor with a dual-arc trochoidal casing surface runway or path. The corners of a piston having three flanks or sides and rotating on an eccentric of an eccentric shaft are provided with radial sealing strips which are in continuous sliding contact with the runway. Overflow or transfer recesses are provided in a housing via which the already closed-off following or trailing working chamber, which is created in the region of the dead center position, is connected briefly with the preceding compression chamber. The leading corners of each of three flanks of the piston are bevelled or chamfered radially inwardly and toward the grooves of the radial sealing strips.

Abstract: A rotary vane type compressor provided with a rotor member arranged eccentrically in the cylindrical housing. Vane plates are radially slidably arranged in the rotor member, so that the vane plates always contact an inner cylindrical surface of the housing. Valve means are provided for a positive close-off of the supply of oil during non-operation of the compressor while maintaining a supply of oil in a necessary amount during operation of the compressor. The compressor further includes an oil reservoir arranged in the rotor member for storing an amount of oil to be directed to a pair of bearing units.

Abstract: A vacuum pump comprises a suction nipple valve including a cylinder, a piston slidably received therein and a movable valve closing member operatively connected to the piston. The vacuum pump further has a pressure medium conduit having a first end communicating with the cylinder; an inlet opening at a second end of the conduit for pressure medium to flow through the inlet opening to the piston; a control arrangement for closing and opening the inlet opening dependent upon run or standstill of the vacuum pump. In the closed state of the inlet opening an oil quantity is maintained above the inlet opening.

Abstract: A rotary fluid pressure device is disclosed of the type including a gerotor displacement mechanism (17), a rotary valve member (55), and a valve seating mechanism (75). The valve seating mechanism includes a balancing ring member (77) seated in an annular groove (81) defined by the valve housing (21). Leakage fluid from the gerotor displacement mechanism passes from the central case drain region (83) through the bearings (33 and 35) to an annular chamber (87). The leakage fluid is communicated from the annular chamber (87) to whichever of the ports (75 or 61) is connected to the system reservoir, through a series of fluid passages (131, 133, 135, 137, and 139). The fluid passage (139) communicates with the annular groove (81), and the leakage fluid flows past whichever of the balancing ring seals (143 or 145) is subjected to low pressure fluid, the balancing ring seal thus acting as a check valve. The invention eliminates the complicated and expensive prior art check valve assemblies (103, 105).