Donald D. Schaefer
6Patents
6h-index
5Co-inventors
52Inventor score
Filing activity: Jan 2, 1979 → Oct 19, 1988
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US4545742A | Vertical 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 area | Mechanical Engineering; Lighting; Heating | 72 | Expired |
| US4383802A | Oil equalization system for parallel connected compressors | Mechanical Engineering; Lighting; Heating | 46 | Expired |
| US4220197A | High speed variable delivery helical screw compressor/expander automotive air conditioning and waste heat energy _recovery system | Emerging Cross-Sectional Technologies | 29 | Expired |
| US4508491A | Modular unload slide valve control assembly for a helical screw rotary compressor | Mechanical Engineering; Lighting; Heating | 22 | Expired |
| US4477233A | Vertical 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 area | Emerging Cross-Sectional Technologies | 18 | Expired |
| US4909716A | Screw step drive internal volume ratio varying system for helical screw rotary compressor | Mechanical Engineering; Lighting; Heating | 16 | Expired |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.