Hans Forch
14Patents
11h-index
9Co-inventors
61Inventor score
Filing activity: Jun 13, 1974 → Feb 11, 1993
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US4277072A | Seal for the gap between a revolving shaft and the bore of a housing against a mixture of a liquid and a gas | Emerging Cross-Sectional Technologies | 37 | Expired |
| US3938813A | Positive-contact seal | Mechanical Engineering; Lighting; Heating | 36 | Expired |
| US4709930A | Shaft and sealing ring | Mechanical Engineering; Lighting; Heating | 26 | Expired |
| US4172599A | Pressure-balanced packing | Mechanical Engineering; Lighting; Heating | 21 | Expired |
| US4695063A | Radial shaft seal ring with backfeed ribs and damming ribs | Mechanical Engineering; Lighting; Heating | 19 | Expired |
| US4428587A | Seal ring with channel for radially accelerating medium to be sealed | Mechanical Engineering; Lighting; Heating | 17 | Expired |
| US3973779A | Sealing arrangement | Emerging Cross-Sectional Technologies | 16 | Expired |
| US4304414A | Pressure-balanced packing | Mechanical Engineering; Lighting; Heating | 13 | Expired |
| US4546985A | Lip seal with channeled and non-channeled portions | Mechanical Engineering; Lighting; Heating | 13 | Expired |
| US4240643A | Annular seal | Emerging Cross-Sectional Technologies | 13 | Expired |
| US5332234A | Sealing arrangement | Mechanical Engineering; Lighting; Heating | 12 | Expired |
| US5018749A | Slide ring seal | Emerging Cross-Sectional Technologies | 10 | Expired |
| US4194748A | Radial shaft sealing ring | Emerging Cross-Sectional Technologies | 9 | Expired |
| US4202555A | Sealing ring | Performing Operations; Transporting | 8 | Expired |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.