Fritz Schadlich
24Patents
13h-index
25Co-inventors
77Inventor score
Filing activity: Jan 28, 1975 → Oct 3, 1986
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US4722021A | Safety circuit for hand tools, and method for safe operation thereof | Emerging Cross-Sectional Technologies | 105 | Expired |
| US4540318A | Rotary electrical tool with speed control, especially drill | Emerging Cross-Sectional Technologies | 66 | Expired |
| US4545121A | Hand-held power tool with circular-disk-shaped tool | Emerging Cross-Sectional Technologies | 56 | Expired |
| US4434586A | Machine tool, especially a hand-held power tool with a turnable clamping element for clamping a tool on the tool spindle | Performing Operations; Transporting | 42 | Expired |
| US4493377A | Electronic two-hand safety system for power tools | Mechanical Engineering; Lighting; Heating | 34 | Expired |
| US4463293A | Method and apparatus for shutting off a power screwdriver | Performing Operations; Transporting | 30 | Expired |
| US4562389A | Automatic screwdriver or torquing tool control system | Emerging Cross-Sectional Technologies | 29 | Expired |
| US4343214A | Arrangement for fastening a circular saw blade on a trunnion axially projecting from a drive shaft | Emerging Cross-Sectional Technologies | 28 | Expired |
| US4002959A | Motor control system, particularly to reduce idling speed | Electricity | 24 | Expired |
| US4056762A | Stroke energy limited motor-driven screwdriver | Performing Operations; Transporting | 21 | Expired |
| US4458565A | Torque limiting power screwdriver | Performing Operations; Transporting | 16 | Expired |
| US4515303A | Electric hammering apparatus with air-cushioned armature | Performing Operations; Transporting | 15 | Expired |
| US4673318A | Hand tool machine, in particular drilling machine | Emerging Cross-Sectional Technologies | 13 | Expired |
| US4360048A | Power driven, hand operated plane | Performing Operations; Transporting | 12 | Expired |
| US4611742A | Electromagnetically operated driving tool with air damper | Performing Operations; Transporting | 12 | Expired |
| US4343115A | Protecting hood for a motor-driven hand tool | Mechanical Engineering; Lighting; Heating | 11 | Expired |
| US4083571A | Drill chuck arrangement | Emerging Cross-Sectional Technologies | 6 | Expired |
| US4392093A | Electronic control and regulating system | Emerging Cross-Sectional Technologies | 4 | Expired |
| US4219747A | Mechanical apparatus for activating no load current limiting circuits in electric motors | Performing Operations; Transporting | 4 | Expired |
| US4209719A | Tachogenerator for rotating machinery | Physics | 3 | Expired |
| US4622779A | Method and apparatus for speed control of a grinder | Emerging Cross-Sectional Technologies | 3 | Expired |
| US4382458A | Planing tool | Performing Operations; Transporting | 2 | Expired |
| US4516045A | Electric power machine with protection against overspeed | Electricity | 1 | Expired |
| US4497354A | Low noise planing machine, particularly hand planer | Performing Operations; Transporting | 0 | Expired |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.