Abstract: A discharge valve assembly is disclosed which includes an improved valve guide and spring retainer having a continuous annular surface surrounding the discharge valve and operative to guide movement thereof. An improved discharge valve is also disclosed which includes an arcuate lower peripheral surface portion defined by a surface of revolution of a curve which surface may form the surface of a zone of a sphere. The annular guide surface and improved discharge valve cooperate to the noise level emanating from the compressor valve assembly and to facilitate manufacture and assembly of the components thereof.

Abstract: An improved valve plate assembly is disclosed herein which is particularly well suited for use in compressors and particularly refrigeration compressors employing pressure responsive reed type valving. The present invention provides several arrangements whereby the velocity of valve member may be reduced as it moves into a closed position so as to substantially reduce the resulting noise generated therefrom.

Abstract: An improved hermetic motor compressor is disclosed which incorporates an improved discharge muffler arrangement wherein the discharge muffler is intergrated with an end portion of the shell and remote from the driving motor whereby heating of the discharge gas by the motor is substantially eliminated and a relatively large surface area is provided to transfer heat to the surrounding atmosphere. Additionally, the compressor incorporates an improved lubrication system wherein in one embodiment a pressure responsive valved vent is provided for the substantially closed crankcase and operates to create a pressure differential between an oil sump and the upper end of an oil distribution passage thereby improving lubricant flow to the bearings as well as providing means for returning lubricant from the crankcase to the sump. In another embodiment a rotating valved vent is provided which operates to selectively place this upper end of an oil distribution passage in communication with the crankcase.

Abstract: A hermetic motor-compressor has a motor cover or shroud overlying the end turns of the motor windings. The motor cover is secured to a fastening device in the form of a ring held in place by the stator fastening bolts. A molded plastic holder or retainer for a motor protector is fitted on a lug formed on the ring. The retainer is adapted to hold protectors of different physical configurations. The lug projects upwardly inside the cover and in one embodiment the retainer is trapped between and held in position by the ring and the cover. The protector is of the thermally responsive electrical cutout type and is maintained in closely overlying heat conductive relationship with respect to the end turns of the motor windings by the motor cover. The parts which hold the retainer and the protector in place are movable into their holding positions by the act of moving the cover down into position, in a direction generally parallel to the axis of the motor.

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: There are disclosed herein several embodiments of a pressure responsive discharge valve assembly particularly adapted for use in reciprocating type gas compressors. The valve assembly includes a discharge passage valve seat of frusto conical shape in which a generally complementary shaped light-weight valve member is disposed. The valve member is preferably formed from a polymeric material, but may also be formed of metal. The materials used and the relative geometry of the valve seat and member are such as to reduce clearance or reexpansion volume, provide quiet closure with good sealing, long life and high speed operation, and still have the required flow areas at low valve lifts, thereby providing improved flow characteristics and efficiency. The included angles of the valve and seat are slightly different to provide progressive closing and sealing without permanent deformation.

Abstract: There is disclosed herein an improved supporting base for refrigeration condensing units which is non-corrosive and includes integral provisions for securing different size refrigeration compressors and associated condensers, as well as an optional receiver. The supporting base also includes a condensate receiving reservoir and means for holding the compressor discharge line beneath the level of condensate therein. The mounting provisions are designed to position the condenser and compressor above the maximum condensate level so as to reduce the likelihood of resulting corrosion thereof and to effectively prevent condensate leakage therefrom.

Abstract: An improved valve assembly and method of making same is disclosed which valve assembly is particularly well suited for use in refrigeration compressors. The valve assembly includes three plate members which may be easily stamped from sheet stock and which are assembled together and subjected to an oven brazing process to thereby provide a unitized valve plate having openings defining both suction and discharge valve seats.

Abstract: An improved discharge valve assembly is disclosed for use in refrigeration compressors which includes a combination valve guide and spring retainer extending into a conical discharge gas passage and which includes an annular conical surface positioned in spaced parallel relationship with the sidewalls defining the discharge gas passage. The conical annular surface cooperates with the sidewalls defining the discharge gas passage to provide a diffusing discharge gas flowpath offering improved compression efficiency and sound reduction.

Abstract: An improved valve plate assembly is disclosed herein which incorporates a spring retainer which is press fitted into a suitable opening provided in the upper plate of a multiple piece valve plate assembly. The spring retainer element may be suitably designed for use with either coil or leaf type springs. An improved attachment arrangement for connecting the leaf spring to the valve member is also disclosed.

Abstract: There are disclosed herein several embodiments of a pressure responsive discharge valve assembly particularly adapted for use in reciprocating type gas compressors. The valve assembly includes a discharge passage valve seat of frusto conical shape in which a generally complementary shaped light-weight valve member is disposed. The valve member is preferably formed from a polymeric material, but may also be formed of metal. The materials used and the relative geometry of the valve seat and member are such as to reduce clearance or reexpansion volume, provide quiet closure with good sealing, long life and high speed operation, and still have the required flow areas at low valve lifts, thereby providing improved flow characteristics and efficiency. The included angles of the valve and seat are slightly different to provide progressive closing and sealing without permanent deformation.

Abstract: There is disclosed herein a suspension system including a shipping stop arrangement for resiliently mounting a refrigeration motor-compressor unit within a hermetically sealed shell. The suspension system comprises a three point supporting arrangement employing a pair of laterally disposed springs, each having a single tapered portion, for providing vertical support to the motor-compressor, in combination with a single top spring for providing lateral stability. Lateral and vertical motion limiting shipping stops are also provided to prevent excessive movement of the motor-compressor, such as may occur during shipment thereof, from damaging the suspension system members. In addition, the system is capable of accommodating different size motor-compressor units in a standardized hermetic shell size by using simple spacers of different sizes.

Abstract: There is disclosed herein an improved means and method for securing a shroud to one end of a motor in a refrigeration compressor. A fastening device is secured to one end of the motor stator by fasteners securing the stator to the compressor housing and is provided with a peripheral flange portion adapted to be folded into engagement with portions of the shroud so as to retain the shroud in position. The stator may therefore be easily accurately positioned with respect to the rotor to assure a uniform circumferential air gap therebetween prior to assembly of the shroud thereto. Additionally, a suction gas directing member may be provided on a portion of the shroud to efficiently direct the suction gas into the motor compartment. In one embodiment, the suction gas is directed through the motor air gap to the compressor via passage means in the compressor housing so as to cool the motor.

Abstract: A hermetic refrigeration compressor system comprises a sealed shell containing two motor-compressor units of different capacities and also containing a suction gas accumulator through and from which suction gas is delivered to both units, the interior of the shell being at suction pressure; gas from an outlet of the accumulator being directed into an aligned, spaced inlet in the motor cover of the smaller unit. Both units are spring-mounted on a unitary support within the shell.

Abstract: There is disclosed an improved compressor cylinder head fabricated out of two separate parts to reduce cost and facilitate assembly, and an improved compressor valve plate for use with said cylinder head which utilizes multiple parts to provide concentric suction and discharge passages. A novel method of fabricating the valve plate is also disclosed.

Abstract: There are disclosed herein several embodiments of a pressure responsive discharge valve assembly particularly adapted for use in reciprocating type gas compressors. The valve assembly includes a discharge passage valve seat of frusto conical shape in which a generally complementary shaped light-weight valve member is disposed. The valve member is preferably formed from a polymeric material, but may also be formed of metal. The materials used and the relative geometry of the valve seat and member are such as to reduce clearance or reexpansion volume, provide quiet closure with good sealing, long life and high speed operation, and still have the required flow areas at low valve lifts, thereby providing improved flow characteristics and efficiency. The included angles of the valve and seat are slightly different to provide progressive closing and sealing without permanent deformation.

Abstract: A reversible positive displacement rotary fluid pump comprising a rotor with dual sliding vanes defining pumping cavities of increasing and decreasing volume and having a single non-valved inlet for both directions of rotation, outlet flow being controlled by a valve plate rotatable to one of two positions, as determined by the direction of rotation of the pump, and a stationary porting plate.

Abstract: There is disclosed an improved discharge valve assembly for compressors utilizing a disc-like pressure responsive discharge valve, the assembly comprising hardened seats on the valve and cylinder head, a compression spring disposed therebetween urging the valve in a closing direction, and a spring guide surrounding the spring and providing a continuous annular stop surface for limiting opening movement of the valve, whereby wear is reduced and valve lift controlled. In an alternative embodiment the assembly operates between the valve and a bridge member rather than the cylinder head.

Abstract: There is disclosed herein a refrigeration compressor having an induction system which includes a conduit for directing suction gas to the compressor and an associated muffler designed to attenuate noise generated by the suction process while still allowing relatively unrestricted flow through the conduit. In one form the conduit and associated suction muffler are integrally formed from a suitable plastic composition as a two piece assembly with the associated muffler being in the form of an elongated chamber overlying an opening in the conduit and arranged in longitudinally parallel relationship thereto.

Abstract: There is disclosed herein an improved motor protection assembly for a motor compressor comprising a motor cover having an opening provided on a side wall thereof adjacent the exposed end turns of the motor stator windings. A motor protection device is adjustably secured to the motor cover and projects through the opening into engagement with a portion of the stator windings so as to enable sensing of abnormal conditions existing within these windings. The motor protection device is electrically connected to the stator windings so as to de-energize the windings in response to such abnormal sensed condition. The adjustable securing arrangement allows the axial positioning of the motor protection device within the opening to be varied thereby enabling a standard motor cover to be used with stator windings of different sizes and different manufacturers.