Abstract:
Apparatus and methods are provided for relieving the compression pressure while starting an internal combustion engine 10. A passage 12 communicates via end openings 22 and 22a between the compression space 13 and the exhaust region 19 in the head 20 of the engine. A spring 16 presses against one side of a piston 15 in a valve 21, holding an end portion 23 away from the opening 22 until the engine speed exceeds the cranking speed. The pressure of the engine's lubricating oil 18 on the opposite side of the piston 15 then forces the end portion 23 against the opening 22, to close the passage 12 and permit the engine to continue running with full compression.
Abstract:
A scroll type fluid displacement machine (10) with a housing (12) a fluid inlet port (78) and a fluid outlet port (76) has an annular piston (88) that biases the balls (90) of the ball coupler and the orbital scroll (29) toward the fixed scroll (18) to move the axial tips (40 and 58) of the wraps (34 and 52) into sealing contact with the end plates (30 and 48) when fluid is pumped into the annular chamber (120). A control system (28) is provided to control the axial position of the orbital scroll (20). The control system (28) includes a solenoid valve (176) which directs fluid from a small trigger compressor (174) to the annular chamber (120) to axially move the orbital scroll (20) into sealing contact with the fixed scroll (18). The solenoid valve (176) also directs fluid from the exhaust chamber (42) to the annular chamber (120) to maintain the orbital scroll (20) in sealing contact with the fixed scroll (18). The solenoid valve (176) also directs fluid from the annular chamber (120) to the sump (232) to stop fluid compression by the scrolls (18 and 20).
Abstract:
A wobble plate piston pump in which means for holding the slipper shoes in close proximity with the wobble plate comprises a first retainer member in the form of an annular plate, loosely fitted on the drive shaft and formed with a plurality of through bores circumferentially arranged in the vicinity of its outer periphery and loosely receiving therethrough trunk portions of the slipper shoes swivellingly engaging the pistons, the retainer member being movable in directions substantially parallel to the wobble plate as the slipper shoes slide on or in close proximity to the wobble plate, a second retainer member having a hollow tubular portion loosely fitted through the first retainer member and unremovably fitted in a central bore formed in the wobble plate and a flanged portion holding the first retainer member on flanged portions of the slipper shoes to keep the latter in close proximity with the wobble plate.
Abstract:
A coupler for joining two eccentrically rotating members for simultaneous rotation about their respective axes at the same angular velocity without angular phase shift. The invention is particularly useful for coupling the rotor and cam ring in certain types of positive fluid displacing devices. The coupling includes a double crank member with a central portion extending along a first axis and two end portions extending from each end of the central portion along a second axis parallel to the first. The central portion is received in a bore in the inner member and the end portions are received in opposing mutually parallel slots in the outer member.
Abstract:
An apparatus for controlling air/fuel ratio in a carburetted single cylinder internal combustion engine, including an apparatus for preventing fuel from being drawn into a carburetor, and, in turn, toward the cylinder inlet, as a result of air flow oscillations occurring during the portion of an engine cycle in which the at least one inlet valve is closed.
Abstract:
A compact, 4-chamber gas meter comprising crankpost and valve drive mechanisms whereby each reciprocating valve moves from a stroke shifting point near center to a stroke endpoint and back to said stroke shifting point with each 180.degree. rotation of the crankpost and each stroke of each diaphragm occurs over said 180.degree. rotation of the crankpost.
Abstract:
A scroll compressor (10) with a fixed scroll (18) and orbital scroll (20) has an axial thrust and anti-rotation assembly (22), a drive assembly (24), a balance assembly (26) and a control system (28). The drive assembly (24) includes a crankshaft (116) and a bushing assembly (108). The bushing assembly includes a bushing body (146) with a slot (154) journaled on the orbital scroll and a drive lug (150) positioned in the slot and non-rotatably secured to the crankshaft (116). Springs (156) bias the bushing body toward a position in which the axis of the bushing body (178) coincides with the axis (176) of the crankshaft and the crankshaft can rotate without moving the orbital scroll. The bushing body (146) can be moved by compressed fluid to a position in which the springs (156) are compressed, the scroll wraps (34 and 56) are in sealing contact and the drive assembly will drive the orbital scroll in a circular orbit with a radius R.sub.0. The balance assembly includes two weight assemblies (184 and 186) with four weights (192, 196, 210 and 214) that are rotated about the axis of a cylindrical extension (182) in response to movement of the drive lug (150) relative to the bushing body (146) between a position in which the orbital scroll (20) is balanced and a position in which the weights balance themselves when the crankshaft (116) rotates without driving the orbital scroll. The control system (28) includes a trigger compressor (242) and a solenoid valve (246) which directs compressed fluid to the sump (88) when the solenoid valve is open and to the chamber (162) in the bushing assembly (108) when the solenoid valve is closed.
Abstract:
A compressor assembly for pumping a recirculating refrigerant including a power input shaft, a power output shaft and a clutch disposed therebetween for translating torque from the power input shaft to the power output shaft. The clutch includes a solenoid for generating an electromagnetic force and an actuator including input friction plates mounted for rotation with the input shaft and output friction plates mounted for rotation with the output shaft. The input and output friction plates are adapted for frictional engagement to translate torque between the input and output shafts. The actuator is responsive to the electromagnetic force to initially move along the axis of the input shaft thereby bringing the input and output friction plates into engagement to translate torque between the input and output shafts to actuate the compressor assembly so as to produce a refrigerant discharge pressure. The actuator is further responsive to the discharge pressure to develop a greater force between the input and output friction plates thereby bringing about full torque translation between the input and output shafts.
Abstract:
A scroll compressor 10 includes a housing 12, a fixed scroll 26, an orbital scroll 48, a scroll drive assembly 74 and an axial thrust and anti-rotation assembly 108. The axial thrust and anti-rotation assembly includes a pair of scroll key ways 110 and 112, a pair of housing key ways 122 and 124 and an Oldham coupler 132 with key blocks 140 and 142 positioned in the scroll key ways and a pair of key blocks 148 and 150 positioned in the housing key ways. Axial loads exerted on the orbital scroll and end plate 50 by fluid under pressure are transferred from the end plate 50 to roller bearings 118 and 120 mounted in the scroll key ways 110 and 112, to the key blocks 140 and 142, to the ring 134 to thrust roller assemblies 156 and 158 in contact with a surface 136 of the Oldham coupler ring 134 and to the housing 12.
Abstract:
An assembly for providing socket plate torque restraint for a variable displacement wobble plate refrigerant compressor includes a non-rotary cross groove joint. The joint has a cylindrical outer race, a cylindrical inner race, slightly angled helical grooves in the races, a plurality of torque receiving balls and a cage for properly maintaining and positioning the balls in the cooperating grooves for operation. The joint is connected to a fixed anti-rotational shaft. The shaft is in the form of a sleeve and forms the inner race to effect torque restraint, but at the same time allow for translational axial motion of the socket plate. Radial and thrust bearings mount said socket plate relative to the rotary hub/journal. Lubricating fluid carried by the gaseous refrigerant lubricates the grooves and is then transferred by a passage extending from the grooves in the outer race to the radial/thrust bearings. The cross groove joint provides the ideal kinematic restraint action for the socket plate; the grooves on said inner and outer races and said cage effectively maintaining the balls situated substantially in a single torque transmitting plane that defines and bisects the joint angle. The joint effectively transmits the restraining torque of the joint to the anti-rotational shaft in a manner effective to substantially eliminate torsional vibration.