Issued Patents All Time
Showing 26–40 of 40 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6716124 | Hydraulic tensioner with improved pressure relief valve reactive to peak operating loads | — | 2004-04-06 |
| 6689003 | Limited articulation chain (inverted tooth or roller) created by “squaring” ends (top and/or bottom) of links/guides of chain | Mark M. Wigsten, Brian R. Scotti | 2004-02-10 |
| 6592483 | CVT chain-belt having wear pads extending from wear links wherein pads are positioned at or between joint/pin ends | — | 2003-07-15 |
| 6575861 | Sprocket and chain for limiting chordal fall motion | Mark M. Wigsten | 2003-06-10 |
| 6477999 | Vane-type hydraulic variable camshaft timing system with lockout feature | — | 2002-11-12 |
| 6387001 | Rollerless chain having sprocket-engaging pins | — | 2002-05-14 |
| 6358169 | Chain tensioner system having a pivoting tensioner arm | — | 2002-03-19 |
| 6322469 | Dual arm chain tensioner for contacting multiple chain strands | — | 2001-11-27 |
| 6322470 | Pivoting dual arm chain tensioner system for contacting multiple chain strands | Mark M. Wigsten | 2001-11-27 |
| 5993342 | Hydraulic tensioner with force limiting tensioner spring | Mark M. Wigsten, Roger T. Simpson | 1999-11-30 |
| 5205249 | Variable camshaft timing system for internal combustion engine utilizing flywheel energy for reduced camshaft torsionals | Roger P. Butterfield | 1993-04-27 |
| 4867200 | Unidirectional fluid flow check valve assembly | — | 1989-09-19 |
| 4864989 | Pre-combustion chamber spark plug and method of igniting lean fuel | — | 1989-09-12 |
| 4531543 | Uni-directional flow, fluid valve | — | 1985-07-30 |
| 4527965 | Lubrication means for cyclically discharging lubricant into a fluid working chamber | — | 1985-07-09 |