| Patent | Date |
|---|
Oil balance system and method for compressors connected in series
Grant 8,075,283 - Shaw December 13, 2 | 2011-12-13 |
Modular multi-rotor compressor and method of manufacture
Grant 7,980,836 - Shaw July 19, 2 | 2011-07-19 |
Defrost System And Method For Heat Pumps
App 20100229575 - Shaw; David N. | 2010-09-16 |
Oil balance system and method for compressors connected in series
Grant 7,651,322 - Shaw January 26, 2 | 2010-01-26 |
Modular Multi-rotor Compressor And Method Of Manufacture
App 20090304538 - Shaw; David N. | 2009-12-10 |
Oil Balance System And Method For Compressors Connected In Series
App 20080283133 - Shaw; David N. | 2008-11-20 |
Heat Pump Apparatus And Method
App 20080173034 - Shaw; David N. | 2008-07-24 |
Oil Balance System And Method For Compressors Connected In Series
App 20080085195 - Shaw; David N. | 2008-04-10 |
Boosted air source heat pump
Grant RE39,625 - Shaw May 15, 2 | 2007-05-15 |
Oil balance system and method for compressors connected in series
App 20060073026 - Shaw; David N. | 2006-04-06 |
Boosted air source heat pump
Grant 6,931,871 - Shaw , et al. August 23, 2 | 2005-08-23 |
Boosted air source heat pump
App 20050044866 - Shaw, David N. ; et al. | 2005-03-03 |
Multi-rotor helical-screw compressor
Grant 6,217,304 - Shaw April 17, 2 | 2001-04-17 |
Multi-rotor helical-screw compressor with discharge side thrust balance device
Grant 6,186,758 - Shaw Feb | 2001-02-13 |
Boosted air source heat pump
Grant 5,927,088 - Shaw July 27, 1 | 1999-07-27 |
Expansion/separation compressor system
Grant 5,911,743 - Shaw June 15, 1 | 1999-06-15 |
Series connected primary and booster compressors
Grant 5,839,886 - Shaw November 24, 1 | 1998-11-24 |
Variable capacity vapor compression cooling system
Grant 5,775,117 - Shaw July 7, 1 | 1998-07-07 |
Multi-rotor helical screw compressor
Grant 5,642,992 - Shaw July 1, 1 | 1997-07-01 |
Oil separator
Grant 5,170,640 - Heitmann , et al. December 15, 1 | 1992-12-15 |
Refrigeration temperature control system
Grant 5,065,591 - Shaw November 19, 1 | 1991-11-19 |
Combined oil heater and level sensor
Grant 5,062,277 - Heitmann , et al. November 5, 1 | 1991-11-05 |
Capacity volume ratio control for twin screw compressors
Grant 5,044,894 - Field , et al. September 3, 1 | 1991-09-03 |
Refrigeration system
Grant 4,947,655 - Shaw August 14, 1 | 1990-08-14 |
Evaporator feed system with flash cooled motor
Grant 4,899,555 - Shaw February 13, 1 | 1990-02-13 |
Common compression zone access ports for positive displacement compressor
Grant 4,878,818 - Shaw November 7, 1 | 1989-11-07 |
Refrigeration system
Grant 4,787,211 - Shaw November 29, 1 | 1988-11-29 |
Expansion compression system for efficient power output regulation of internal combustion engines
Grant 4,667,646 - Shaw May 26, 1 | 1987-05-26 |
Constant evaporator pressure slide valve modulator for screw compressor refrigeration system
Grant 4,583,373 - Shaw April 22, 1 | 1986-04-22 |
Oil atomizing compressor working fluid cooling system for gas/vapor/helical screw rotary compressors
Grant 4,497,185 - Shaw February 5, 1 | 1985-02-05 |
Temperature and pressure actuated capacity control system for air conditioning system
Grant 4,495,778 - Shaw January 29, 1 | 1985-01-29 |
Self-cleaning single loop mist type lubrication system for screw compressors
Grant 4,439,121 - Shaw March 27, 1 | 1984-03-27 |
Control system for screw compressor
Grant 4,412,788 - Shaw , et al. * November 1, 1 | 1983-11-01 |
Combined pressure matching and capacity control slide valve assembly for helical screw rotary machine
Grant RE31,379 - Shaw September 13, 1 | 1983-09-13 |
Stepping type unloading system for helical screw rotary compressor
Grant 4,388,048 - Shaw , et al. June 14, 1 | 1983-06-14 |
Screw compressor slide valve engine RPM tracking system
Grant 4,342,199 - Shaw , et al. August 3, 1 | 1982-08-03 |
Vertical axis hermetic rotary helical screw compressor with improved rotary bearings and oil management
Grant RE30,994 - Shaw July 13, 1 | 1982-07-13 |
Unloading control system for helical screw compressor refrigeration system
Grant 4,335,582 - Shaw , et al. June 22, 1 | 1982-06-22 |
Bottoming cycle refrigerant scavenging for positive displacement compressor, refrigeration and heat pump systems
Grant 4,332,144 - Shaw June 1, 1 | 1982-06-01 |
Compressor heat pump system with maximum and minimum evaporator .DELTA.T control
Grant 4,257,795 - Shaw March 24, 1 | 1981-03-24 |
Control system for screw compressor
Grant 4,249,866 - Shaw , et al. February 10, 1 | 1981-02-10 |
Solar augmented heat pump system with automatic staging reciprocating compressor
Grant 4,245,476 - Shaw * January 20, 1 | 1981-01-20 |
Attic mounted solar assist multi-source/sink residential heat pump system
Grant 4,242,872 - Shaw January 6, 1 | 1981-01-06 |
Combined pressure matching and capacity control slide valve assembly for helical screw rotary machine
Grant 4,222,716 - Shaw September 16, 1 | 1980-09-16 |
High speed variable delivery helical screw compressor/expander automotive air conditioning and waste heat energy _recovery system
Grant 4,220,197 - Schaefer , et al. September 2, 1 | 1980-09-02 |
Tri-level multi-cylinder reciprocating compressor heat pump system
Grant 4,197,719 - Shaw April 15, 1 | 1980-04-15 |
Multi-step regenerated organic fluid helical screw expander hermetic induction generator system
Grant 4,185,465 - Shaw January 29, 1 | 1980-01-29 |
Refrigeration system on/off cycle
Grant 4,180,986 - Shaw January 1, 1 | 1980-01-01 |
Reverse fan heat pump defrost control system
Grant 4,178,767 - Shaw December 18, 1 | 1979-12-18 |
Oil equalization system for parallel connected hermetic helical screw compressor units
Grant 4,179,248 - Shaw December 18, 1 | 1979-12-18 |
Solar augmented heat pump system with automatic staging reciprocating compressor
Grant 4,148,436 - Shaw April 10, 1 | 1979-04-10 |
Heat pump system with high efficiency reversible helical screw rotary compressor
Grant 4,058,988 - Shaw November 22, 1 | 1977-11-22 |
Undercompression and overcompression free helical screw rotary compressor
Grant RE29,283 - Shaw June 28, 1 | 1977-06-28 |
Undercompression and overcompression free helical screw rotary compressor
Grant 3,936,239 - Shaw February 3, 1 | 1976-02-03 |
Refrigeration System Including A Flow Metering Device
Grant 3,659,433 - Shaw May 2, 1 | 1972-05-02 |
| 