Fred F. Chellis

Person

Concord, MA, US

People

Patents Grantslast 30 patents

Information Patent Grant
Electronic control of cryogenic refrigerators
- Patent number 4,543,793
- Issue date Oct 1, 1985
- Helix Technology Corporation
- Fred F. Chellis
- F25 - REFRIGERATION OR COOLING COMBINED HEATING AND REFRIGERATION SYSTEMS HEA...
Information Patent Grant
Fluid actuator for cryogenic valve
- Patent number 4,466,251
- Issue date Aug 21, 1984
- Helix Technology Corporation
- Fred F. Chellis
- F25 - REFRIGERATION OR COOLING COMBINED HEATING AND REFRIGERATION SYSTEMS HEA...
Information Patent Grant
Refrigeration system and reciprocating compressor therefor with pre...
- Patent number 4,244,192
- Issue date Jan 13, 1981
- Helix Technology Corporation
- Fred F. Chellis
- F25 - REFRIGERATION OR COOLING COMBINED HEATING AND REFRIGERATION SYSTEMS HEA...
Information Patent Grant
Cryogenic apparatus having means to coordinate displacer motion wit...
- Patent number 4,180,984
- Issue date Jan 1, 1980
- Helix Technology Corporation
- Fred F. Chellis
- F25 - REFRIGERATION OR COOLING COMBINED HEATING AND REFRIGERATION SYSTEMS HEA...
Information Patent Grant
Refrigeration system with magnetic linkage
- Patent number 4,158,293
- Issue date Jun 19, 1979
- Cryogenic Technology, Inc.
- Fred F. Chellis
- F02 - COMBUSTION ENGINES HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
Information Patent Grant
Refrigeration system with magnetic linkage
- Patent number 4,118,943
- Issue date Oct 10, 1978
- Cryogenic Technology, Inc.
- Fred Freeman Chellis
- F02 - COMBUSTION ENGINES HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS

Fred F. Chellis

Person

Patents Grantslast 30 patents

Electronic control of cryogenic refrigerators

Fluid actuator for cryogenic valve

Refrigeration system and reciprocating compressor therefor with pre...

Cryogenic apparatus having means to coordinate displacer motion wit...

Refrigeration system with magnetic linkage

Refrigeration system with magnetic linkage