Franklin R. Smith
47Patents
18h-index
17Co-inventors
78Inventor score
Filing activity: Jul 13, 1987 → Oct 11, 2018
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US5107804A | Variable camshaft timing for internal combustion engine | Mechanical Engineering; Lighting; Heating | 95 | Expired |
| US5002023A | Variable camshaft timing for internal combustion engine | Mechanical Engineering; Lighting; Heating | 93 | Expired |
| US6361458B1 | Hydraulic tensioner with pressure relief valve | Mechanical Engineering; Lighting; Heating | 51 | Expired |
| US5361735A | Belt driven variable camshaft timing system | Mechanical Engineering; Lighting; Heating | 49 | Expired |
| US7000580B1 | Control valves with integrated check valves | Mechanical Engineering; Lighting; Heating | 40 | Expired |
| US5577970A | Hydraulic tensioner with a pressure relief valve | Mechanical Engineering; Lighting; Heating | 33 | Expired |
| US6481402B1 | Variable camshaft timing system with pin-style lock between relatively oscillatable components | Emerging Cross-Sectional Technologies | 31 | Expired |
| US4869708A | Sprocket retention/chain guide assembly | Mechanical Engineering; Lighting; Heating | 30 | Expired |
| US5046460A | Variable camshaft timing for internal combustion engine | Mechanical Engineering; Lighting; Heating | 30 | Expired |
| US8800515B1 | Cam torque actuated variable camshaft timing device with a bi-directional oil pressure bias circuit | Mechanical Engineering; Lighting; Heating | 29 | Active |
| US8356583B2 | Variable camshaft timing device with hydraulic lock in an intermediate position | Mechanical Engineering; Lighting; Heating | 27 | Active |
| US6814038B2 | Spool valve controlled VCT locking pin release mechanism | Mechanical Engineering; Lighting; Heating | 25 | Expired |
| US5367992A | Variable camshaft timing system for improved operation during low hydraulic fluid pressure | Mechanical Engineering; Lighting; Heating | 23 | Expired |
| US6666181B2 | Hydraulic detent for a variable camshaft timing device | Mechanical Engineering; Lighting; Heating | 22 | Expired |
| US4862770A | Two-speed alternator drive | Electricity | 21 | Expired |
| US6745735B2 | Air venting mechanism for variable camshaft timing devices | Mechanical Engineering; Lighting; Heating | 20 | Expired |
| US4862845A | Variable camshaft timing system | Mechanical Engineering; Lighting; Heating | 20 | Expired |
| US6941913B2 | Spool valve controlled VCT locking pin release mechanism | Mechanical Engineering; Lighting; Heating | 18 | Expired |
| US6668778B1 | Using differential pressure control system for VCT lock | Mechanical Engineering; Lighting; Heating | 15 | Expired |
| US5718650A | Hydraulic tensioner with porous vent | Mechanical Engineering; Lighting; Heating | 14 | Expired |
| US7124722B2 | Remote variable camshaft timing control valve with lock pin control | Mechanical Engineering; Lighting; Heating | 12 | Expired |
| US5207192A | Variable camshaft timing system utilizing square-edged spool valve | Mechanical Engineering; Lighting; Heating | 12 | Expired |
| US6312351A | Hydraulic tensioner with pivotal mount | Mechanical Engineering; Lighting; Heating | 11 | Expired |
| US5152261A | Variable camshaft timing system utilizing changes in length of portions of a chain or belt | Mechanical Engineering; Lighting; Heating | 9 | Expired |
| US8820280B2 | Variable camshaft timing mechanism with a default mode | Mechanical Engineering; Lighting; Heating | 7 | Active |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.