Copeland Corporation

Forma Scientific, Inc.

Donald W Rode

Jean-Luc M Caillat

Frank S Wallis

Norman G Beck

Gary J Anderson

Francis M Simpson

A cooling device for rapidly cooling items, such as biological samples. The cooling device includes an enclosure having a chamber and an air circulation path at least partially within the chamber. A fan is operatively connected to the chamber for circulating air within the air circulation path and a perforated tube is disposed within the air circulation path for receiving a liquid refrigerant under pressure and distributing refrigerant in gaseous form to the air circulation path. Preferably the perforated tube is formed as a coil having multiple revolutions and either an axial blade fan or a centrifugal fan is received generally within the coils.

Cooling device having liquid refrigerant injection ring

A scroll machine has an intermediate pressure cavity which is operable to open and close a leakage path between the discharge zone and the suction zone of the scroll machine. The leakage path is closed when intermediate pressurized fluid is supplied to the cavity and the leakage path is open when the cavity is open to the suction zone of the compressor. A valve (102) which can be mechanical or electrical is used to open and close a passageway extending between the cavity and the suction zone of the machine. A high pressure relief valve is incorporated into the design of the compressor to prevent slugging. The high pressure relief valve will release the intermediate pressurized fluid to suction and/or discharge when the pressure within the intermediate pressure cavity exceeds a predetermined value.

Scroll machine with reverse rotation protection

A scroll machine has an intermediate pressure cavity which is operable to open and close a leakage path between the discharge zone and the suction zone of the scroll machine. The leakage path is closed when intermediate pressurized fluid is supplied to the cavity and the leakage path is open when the cavity is open to the suction zone of the compressor. A valve which can be mechanical or electrical is used to open and close a passageway extending between the cavity and the suction zone of the machine. Biasing means is located within the scroll machine in order to control the rate at which the intermediate pressurized fluid is bled to the suction zone of the compressor.

A scroll machine has an intermediate pressure cavity which is operable to open and close a leakage path between the discharge zone and the suction zone of the scroll machine. The leakage path is closed when intermediate pressurized fluid is supplied to the cavity and the leakage path is open when the cavity is open to the suction zone of the compressor. A valve which can be mechanical or electrical is used to open and close a passageway extending between the cavity and the suction zone of the machine.

An orbital shaker having an upper horizontal orbiting platform and including a counterbalancing mechanism for stabilizing forces associated with the orbiting mass. The counterbalancing mechanism counteracts the moment created by the orbiting mass in the X-Z plane of the upper orbiting shaft by way of a lower counterweight rotating in phase, but spaced from the Z coordinate of the shaker load. The lower counterweight is positioned low relative to the driven, rotating shaft and is preferably incorporated into the drive sheave of the shaker. An upper counterweight, sized to counter the mass of the load, platform, etc., above it and the lower counterweight below it in the X-Y direction is connected to the driven shaft located out of phase with the load and the lower counterweight and between the load and lower counterweight in the Z direction.

Dynamically balanced orbital shaker

A thermal protection system for a scroll compressor has a temperature sensor which is positioned directly within the discharge passage of the scroll compressor by being directed through an access passageway between the discharge zone and the suction zone of the compressor. The lead wires from the temperature sensor are wired in series with the normal motor temperature sensor circuit to provide the scroll discharge temperature control function as an integral part of the motor temperature control system located within the hermetic shell of the compressor. An additional embodiment of the present invention not only detects discharge gas temperatures but it also has the ability to detect the actual temperature of other selected compressor components.

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Marietta, OH, United States of America

Donald W Rode