Inventor · disambiguated record
Donald D. Schaefer
Also filed as: GAGNON JOSEPH A M · SCHAEFER DONALD D
6 granted patents·310 citations·filing 1979–1988
87Inventor score
Technology areasF04C
Files withDUNHAM BUSH INC6
Top patents by PatentIndex Score
6 records- 0195US4545742AVertical axis hermetic helical screw rotary compressor with discharge gas oil mist eliminator and dual transfer tube manifold for supplying liquid refrigerant and refrigerant vapor to the compression areaDUNHAM BUSH INC·Filed 1984·Granted Oct 8, 1985·105 cites·2 claims
- 0293US4220197AHigh speed variable delivery helical screw compressor/expander automotive air conditioning and waste heat energy _recovery systemDUNHAM BUSH INC·Filed 1979·Granted Sep 2, 1980·50 cites·23 claims
- 0390US4383802AOil equalization system for parallel connected compressorsDUNHAM BUSH INC·Filed 1981·Granted May 17, 1983·67 cites·6 claims
- 0480US4477233AVertical axis hermetic helical screw rotary compressor with discharge gas oil mist eliminator and dual transfer tube manifold for supplying liquid refrigerant and refrigerant vapor to the compression areaDUNHAM BUSH INC·Filed 1982·Granted Oct 16, 1984·32 cites·6 claims
- 0579US4508491AModular unload slide valve control assembly for a helical screw rotary compressorDUNHAM BUSH INC·Filed 1982·Granted Apr 2, 1985·31 cites·6 claims
- 0667US4909716AScrew step drive internal volume ratio varying system for helical screw rotary compressorDUNHAM BUSH INC·Filed 1988·Granted Mar 20, 1990·25 cites·10 claims
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →