Abstract: A heat pump system, utilizing a multi-component refrigerant blend in which a low pressure component is zeotropic with respect to the remainder of the blend, separates the low pressure component by rectification to enhance heating capability in low ambient temperatures. Vapor is separated from liquid in the effluent of the condenser of a heat pump, at a pressure in equilibrium at a temperature midway between the evaporator and condenser effluent temperatures, the vapor being applied to an auxiliary inlet at a mid pressure point in the compression stroke of the compressor.

Abstract: A heat pump system, utilizing a multi-component refrigerant blend in which a low pressure component is zeotropic with respect to the remainder of the blend, separates the low pressure component by rectification to enhance heating capability in low ambient temperatures. Vapor is separated from liquid in the effluent of the condenser of a heat pump, at a pressure in equilibrium at a temperature midway between the evaporator and condenser effluent temperatures, the vapor being applied to an auxiliary inlet at a mid pressure point in the compression stroke of the compressor.

Abstract: The motion of the orbiting scroll is used to cause pumping of oil in a hermetic horizontal scroll compressor.

Abstract: A durable low weight compressor having improved performance is disclosed. The compressor includes a fiber reinforced resin matrix composite housing and a fiber reinforced glass marix composite compression chamber liner. An air conditioner including an improved compressor is also disclosed.

Abstract: A method for manufacturing a discontinuous fiber reinforced glass matrix composites by injection molding using an injection nozzle that separates substantially all of a multifilament yarn into individual fibers resulting in a composite having greater crack resistance. The method comprises impregnating continuous filament yarn with glass matrix powders comprising glass, glass-ceramic powders or a mixture thereof. The impregnated multifilament yarn is chopped into discontinuous lengths and exposed to a temperature sufficient so that the matrix material softens. Pressure is applied to the heated impregnated multifilament yarn sufficient to displace the yarn into a mold through an injection nozzle contoured such that sufficient die-wall shear forces are generated to separate substantially all of the multifilament yarn into individual filaments. A mold pressure is maintained sufficient to prevent relaxation of the composite until the strain point of the glass is reached.

Abstract: A bearing arrangement which is to be used for supporting a rotatable shaft used in a system employing a pressurized medium at a pressure which is partially dependent on the speed of rotation of the shaft includes a main bearing sleeve mounted on a support and surrounding the shaft. The working medium is supplied between the shaft and the bearing sleeve to fully support the shaft in the bearing sleeve when the pressure of the working medium exceeds a predetermined value. The bearing arrangement further includes at least one, but possibly more than one, auxiliary bearing including a split bearing ring which has a conical outer circumferential surface and a stationary outer bearing ring surrounding the split bearing ring and having a conical inner ramp surface.

Abstract: Articles of zeolite, such as 6 mm thick plates suitable for use in cryopumps, are produced by cold isostatic pressing fine powders with pore sizes between 2-25.times.10.sup.-10 m without the aid of binders. Plates which have smooth hard surfaces and high porosity may be readily machined.

Abstract: An improved cryopump has cryopanels with pressed zeolite plates mounted thereon. The plates are maintained in intimate but unbonded contact with the panels by use of spring-type mechanisms. Older style panels have clay-bonded zeolite casts attached to their surfaces. The new configuration allows relative expansion and contraction between the zeolite plates and the panels, thereby improving durability of the zeolite. The resilient attachments assure that intimate contact and consequent good cooling of the zeolite adsorptive surface will be maintained during operation of the pump. The zeolite panels are desirably less than about 8 mm thick and are made by isostatic compaction of powders having pore sizes in the range of 2-25.times.10.sup.-10 m.

Abstract: A cryopump having a cryopanel adapted for being cooled by a first refrigerant and shielded from radiation incident thereon by shields adapted for being cooled with a second refrigerant is disclosed. The cryopanel and the radiation shield are fabricated with a first material having high thermal conductivity, such as aluminum, while means for distributing refrigerant from refrigerant dewars to the cryopanel and shields are made of a second material, such as stainless steel. The stainless steel and aluminum sections are connected by an aluminum-steel transition connector adapted for providing vacuum tight connections at cryogenic temperatures. Both the cryopanel and chevrons comprising the shields are fabricated and extruded aluminum with coolant passages formed therein. Thermal distortions during operation are compensated by the use of stainless steel bellows within refrigerant distribution lines.

Abstract: An improved process for fabricating a sealing flange assembly useful for oval and other noncircular access ports in high vacuum equipment is disclosed. The process is applicable to sealing flange assemblies of the type which include relatively hard metallic flange members having opposed, mating surfaces at least a portion of which are chamfered to define a V-shaped notch therebetween and a relatively soft metallic sealing member disposed in the notch under compression against the chamfered surfaces. The process relates specifically to the machining of the chamfered sealing surfaces by a milling process which utilizes a specially ground end mill and selected depths of cut to provide a more or less grooved sealing surface profile essentially devoid of tool chatter marks and metal folds which represent nonsealable surface defects. The as-milled chamfered sealing surfaces are much coarser (32.mu. inch finish) than those produced by grinding (8.mu.