Butterfield; Roger P.
Patent Applications and Registrations
Patent applications and USPTO patent grants for Butterfield; Roger P..The latest application filed is for "phaser with oil pressure assist".
- Butterfield; Roger P. - Trumansburg NY
- Butterfield; Roger P. - Interlaken NY
| Patent | Date |
|---|---|
| Phaser with oil pressure assist Grant 8,561,583 - Butterfield October 22, 2 | 2013-10-22 |
| Phaser With Oil Pressure Assist App 20120285406 - Butterfield; Roger P. | 2012-11-15 |
| Variable cam timing controls mounted in the camshaft Grant 8,256,393 - Simpson , et al. September 4, 2 | 2012-09-04 |
| Variable Cam Timing Controls Mounted In The Camshaft App 20100186699 - Simpson; Roger T. ; et al. | 2010-07-29 |
| High-performance silent chain Grant 7,404,778 - Butterfield July 29, 2 | 2008-07-29 |
| Variable chamber volume phaser Grant 7,318,401 - Pluta , et al. January 15, 2 | 2008-01-15 |
| High-performance Silent Chain App 20070287563 - Butterfield; Roger P. | 2007-12-13 |
| Variable chamber volume phaser App 20070215084 - Pluta; Christopher J. ; et al. | 2007-09-20 |
| Silent chain Grant 7,056,248 - Butterfield June 6, 2 | 2006-06-06 |
| Power transmission chain having links with lateral spacing elements Grant 7,048,665 - Ledvina , et al. May 23, 2 | 2006-05-23 |
| VCT mechanism incorporating camshaft bearing journal Grant 6,966,289 - Butterfield November 22, 2 | 2005-11-22 |
| High-performance silent chain App 20050049098 - Butterfield, Roger P. | 2005-03-03 |
| Silent chain App 20050049097 - Butterfield, Roger P. | 2005-03-03 |
| Power transmission chain having links with lateral spacing elements App 20030236145 - Ledvina, Tim J. ; et al. | 2003-12-25 |
| Power transmission chain having links with lateral spacing elements Grant 6,595,882 - Bubel , et al. July 22, 2 | 2003-07-22 |
| Power transmission chain having links with lateral spacing elements App 20020128102 - Bubel, Dennis J. ; et al. | 2002-09-12 |
| Fastenerless chain snubber App 20020042316 - Young, Roger G. JR. ; et al. | 2002-04-11 |
| Three-way phased continuously variable transmission chain with strut retention Grant 6,123,638 - Butterfield September 26, 2 | 2000-09-26 |
| VCT system utilizing engine oil pressure for actuation Grant 5,657,725 - Butterfield , et al. August 19, 1 | 1997-08-19 |
| Variable camshaft timing system for improved operation during low hydraulic fluid pressure Grant 5,367,992 - Butterfield , et al. November 29, 1 | 1994-11-29 |
| Belt driven variable camshaft timing system Grant 5,361,735 - Butterfield , et al. * November 8, 1 | 1994-11-08 |
| Differential pressure control system for variable camshaft timing system Grant 5,172,659 - Butterfield , et al. December 22, 1 | 1992-12-22 |
| Variable camshaft timing for internal combustion engine Grant 5,046,460 - Butterfield , et al. * September 10, 1 | 1991-09-10 |
| Variable camshaft timing for internal combustion engine Grant 5,002,023 - Butterfield , et al. March 26, 1 | 1991-03-26 |
| Variable camshaft timing system Grant 4,862,845 - Butterfield , et al. September 5, 1 | 1989-09-05 |
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