Arthur D. Little, Inc.

Gm Global Technolgoy Operations, Inc.

Robert M Lucas

Ronald J Forni

John E McCullough

Yoshitaka Shibamoto

Hiromichi Ueno

Hiroyuki Taniwa

Thomas P Hosmer

Ralph A Gordon

Shigeki Hagiwara

Richard H Spencer

John T Bartoszek

David W Almgren

Chalres T Hoffman, Jr

Katsumi Sakitani

Richard J Whitehead

William H Saia

Richard P Berthiaume

A thermal isolation arrangement for use in a co-rotating scroll refrigerant compressor includes various thermal insulation elements adapted to minimize heat transfer between hot rotating members of the scroll fluid device and the return refrigerant to be compressed, and between hot lubricant in the compressor and the return refrigerant. The thermal isolation elements of the present invention may be used individually or collectively to minimize the preheating of the inlet refrigerant so as to maintain the density of the return refrigerant being compressed to thereby increase the total efficiency of the scroll fluid device.

Thermal isolation arrangement for scroll fluid device

A bearing and lubrication system for a sealed, integrated motor driven co-rotating scroll refrigerant compressor includes hydrostatic bearings and an independent motor driven lubricant supply pump for supplying lubricant to the hydrostatic bearings mounting in the housing. The housing is divided into a high-pressure section that receives compressed refrigerant and a low pressure section containing the involute scroll compressor wraps. Individual lubricant supply sumps are provided in the high and lower pressure housing sections for supplying lubricant to the compressor bearings. The lubricant pump is capable of drawing lubricant from one or both of the lubricant supply sumps. A lubricant level sensor associated with one of the low or high pressure housing sumps is provided to maintain a desired level of lubricant therein. The lubricant supply pump is controlled so that pressure is supplied to the hydrostatic bearings during compressor operation. The lubricant may be pressurized by compressed refrigerant in the high-pressure housing section for supply to the compressor bearings with or without operation of the lubricant supply pump.

Bearing and lubrication system for a scroll fluid device

A disc brake caliper is provided which has a parking brake. A dual lever parking brake apply assembly is also included which allows adjustment of the parking brake without modification of the parking brake cable. The adjustment is made by changing the relative position of the levers with one another.

Mechanism and method of positive arcuate orientation of a first member

In a space shuttle, payloads are individually temperature controlled by means of a liquid control loop in heat exchange relationship with both the payload and a radiator or shuttle cold plate. The liquid pump is driven at a variable speed to control the heat transferred between the load and the radiator or cold plate, and the motor may be reversed to by-pass the radiator through check valves. The radiator includes heat pipes seated in elongated, high thermal conductivity extrusions and retained therein by elongated springs. The motor is a brushless DC motor isolated from the pump by a magnetic clutch and thermal isolator. The motor is driven by a digital circuit which provides a single pulse to each set of windings during each energizing time frame. The width of that pulse is modulated to provide for speed control. Pulse width modulation is by means of a one-shot, the pulse duration of which is controlled by a speed control signal.

Thermal control system

Growing community of inventors

Melrose, MA, United States of America

Robert M Lucas