Langenfeld; Thomas J.
Patent Applications and Registrations
Patent applications and USPTO patent grants for Langenfeld; Thomas J..The latest application filed is for "electric motor and gear assembly".
Company Profile
2.104.0
- Langenfeld; Thomas J. - Sullivan IL
- - Sullivan IL US
Patent Activity
| Patent | Date |
|---|---|
| Electric motor and gear assembly Grant 11,346,439 - Langenfeld , et al. May 31, 2 | 2022-05-31 |
| Electric motor and gear assembly Grant 11,338,669 - Langenfeld May 24, 2 | 2022-05-24 |
| Electric drive assembly Grant 11,235,661 - Bonny , et al. February 1, 2 | 2022-02-01 |
| Fluid expansion tank Grant 11,215,275 - Langenfeld , et al. January 4, 2 | 2022-01-04 |
| Steerable transaxle Grant 11,118,680 - Langenfeld September 14, 2 | 2021-09-14 |
| Vent for a hydraulic drive device Grant 10,899,221 - Langenfeld January 26, 2 | 2021-01-26 |
| Electric motor with compound planetary gear drive Grant 10,876,596 - Bonny , et al. December 29, 2 | 2020-12-29 |
| Drive apparatus Grant 10,793,002 - Langenfeld October 6, 2 | 2020-10-06 |
| Transaxle having dual brake system Grant 10,539,163 - Langenfeld Ja | 2020-01-21 |
| Drive device Grant 10,480,142 - Langenfeld Nov | 2019-11-19 |
| Fluid expansion tank Grant 10,451,171 - Langenfeld , et al. Oc | 2019-10-22 |
| Hydrostatic transmission Grant 10,352,421 - Langenfeld July 16, 2 | 2019-07-16 |
| Steerable transaxle Grant 10,337,608 - Langenfeld | 2019-07-02 |
| Drive apparatus Grant 10,166,864 - Langenfeld J | 2019-01-01 |
| Hydraulic motor having a dual brake system Grant 10,059,313 - Langenfeld August 28, 2 | 2018-08-28 |
| Drive assembly Grant 9,976,640 - Bonny , et al. May 22, 2 | 2018-05-22 |
| Drive device Grant 9,914,350 - Langenfeld , et al. March 13, 2 | 2018-03-13 |
| Hydraulic motor assembly Grant 9,879,671 - Taylor , et al. January 30, 2 | 2018-01-30 |
| Transaxle having dual brake system Grant 9,816,536 - Langenfeld November 14, 2 | 2017-11-14 |
| Vehicle with steering mechanism Grant 9,802,646 - Langenfeld October 31, 2 | 2017-10-31 |
| Hydrostatic transmission Grant 9,664,270 - Langenfeld May 30, 2 | 2017-05-30 |
| Steerable transaxle Grant 9,610,840 - Langenfeld April 4, 2 | 2017-04-04 |
| Steerable transaxle Grant 9,598,103 - Langenfeld , et al. March 21, 2 | 2017-03-21 |
| Transaxle fluid expansion and contraction accommodation apparatus Grant 9,469,191 - Langenfeld October 18, 2 | 2016-10-18 |
| Three wheeled vehicle Grant 9,408,344 - Langenfeld August 9, 2 | 2016-08-09 |
| Valve Grant 9,410,631 - Langenfeld August 9, 2 | 2016-08-09 |
| Drive device Grant 9,371,865 - Bennett , et al. June 21, 2 | 2016-06-21 |
| Hydraulic motor having a dual brake system Grant 9,371,842 - Langenfeld June 21, 2 | 2016-06-21 |
| Return to neutral device for a hydraulic apparatus Grant 9,328,611 - Langenfeld May 3, 2 | 2016-05-03 |
| Transaxle having dual brake system Grant 9,163,724 - Langenfeld October 20, 2 | 2015-10-20 |
| Drive assembly Grant 9,139,086 - Bonny , et al. September 22, 2 | 2015-09-22 |
| Drive device Grant 9,109,684 - Langenfeld , et al. August 18, 2 | 2015-08-18 |
| Hydraulic motor assembly Grant 9,021,799 - Taylor , et al. May 5, 2 | 2015-05-05 |
| Transaxle fluid expansion and contraction accommodation apparatus Grant 8,931,268 - Langenfeld January 13, 2 | 2015-01-13 |
| Variable drive apparatus Grant 8,919,116 - Langenfeld , et al. December 30, 2 | 2014-12-30 |
| Variable drive apparatus Grant 08919116 - | 2014-12-30 |
| Steerable transaxle Grant 8,820,066 - Langenfeld September 2, 2 | 2014-09-02 |
| Variable drive apparatus Grant 8,683,796 - Langenfeld , et al. April 1, 2 | 2014-04-01 |
| Drive assembly Grant 8,636,616 - Langenfeld January 28, 2 | 2014-01-28 |
| Gear drive Grant 8,628,448 - Langenfeld , et al. January 14, 2 | 2014-01-14 |
| Drive device Grant 8,534,060 - Bennett , et al. September 17, 2 | 2013-09-17 |
| Brake actuation assembly Grant 8,517,159 - Langenfeld August 27, 2 | 2013-08-27 |
| Return to neutral device for a hydraulic apparatus Grant 8,499,680 - Langenfeld August 6, 2 | 2013-08-06 |
| Drive assembly Grant 8,479,418 - Langenfeld July 9, 2 | 2013-07-09 |
| Gear drive Grant 8,465,388 - Langenfeld , et al. June 18, 2 | 2013-06-18 |
| Drive device Grant 8,464,610 - Langenfeld , et al. June 18, 2 | 2013-06-18 |
| Hydraulic drive apparatus Grant 8,381,517 - Langenfeld , et al. February 26, 2 | 2013-02-26 |
| Drive assembly Grant 8,313,408 - Langenfeld November 20, 2 | 2012-11-20 |
| Zero turn transaxle Grant 8,245,509 - Langenfeld , et al. August 21, 2 | 2012-08-21 |
| Gear drive Grant 8,235,858 - Langenfeld , et al. August 7, 2 | 2012-08-07 |
| Hydraulic motor apparatus Grant 8,221,276 - Langenfeld , et al. July 17, 2 | 2012-07-17 |
| Valve Grant 8,132,588 - Langenfeld , et al. March 13, 2 | 2012-03-13 |
| Brake actuation assembly Grant 8,057,335 - Langenfeld November 15, 2 | 2011-11-15 |
| Return to neutral device for a hydraulic apparatus Grant 8,001,883 - Langenfeld August 23, 2 | 2011-08-23 |
| Hydraulic drive apparatus Grant 7,926,266 - Wigness , et al. April 19, 2 | 2011-04-19 |
| Hydraulic motor apparatus Grant 7,927,245 - Langenfeld , et al. April 19, 2 | 2011-04-19 |
| Zero turn transaxle Grant 7,841,176 - Langenfeld , et al. November 30, 2 | 2010-11-30 |
| Combined check valve and pressure relief valve Grant 7,568,497 - Langenfeld , et al. August 4, 2 | 2009-08-04 |
| Hydraulic drive apparatus Grant 7,487,636 - Wigness , et al. February 10, 2 | 2009-02-10 |
| Hydraulic motor apparatus including brake mechanism Grant 7,476,171 - Langenfeld , et al. January 13, 2 | 2009-01-13 |
| Motor apparatus including brake mechanism Grant 7,476,172 - Langenfeld , et al. January 13, 2 | 2009-01-13 |
| Zero turn transaxle Grant 7,454,908 - Langenfeld , et al. November 25, 2 | 2008-11-25 |
| Adjustable hydraulic motor apparatus Grant 7,412,828 - Bennett , et al. August 19, 2 | 2008-08-19 |
| Hydraulic motor apparatus Grant 7,409,890 - Langenfeld , et al. August 12, 2 | 2008-08-12 |
| Hydrostatic transaxle Grant 7,396,310 - Langenfeld July 8, 2 | 2008-07-08 |
| Combined check valve and pressure relief valve Grant 7,367,353 - Langenfeld , et al. May 6, 2 | 2008-05-06 |
| Zero turn transaxle Grant 7,328,576 - Langenfeld , et al. February 12, 2 | 2008-02-12 |
| Adjustable hydraulic motor apparatus Grant 7,308,790 - Bennett , et al. December 18, 2 | 2007-12-18 |
| Combination check valve and pressure rise rate valve Grant 7,258,134 - Langenfeld , et al. August 21, 2 | 2007-08-21 |
| Fastener and valve for a hydraulic apparatus Grant 7,234,300 - Langenfeld , et al. June 26, 2 | 2007-06-26 |
| Bypass mechanism for a hydraulic drive apparatus Grant 7,225,617 - Langenfeld , et al. June 5, 2 | 2007-06-05 |
| Hydrostatic transaxle Grant 7,210,294 - Langenfeld , et al. May 1, 2 | 2007-05-01 |
| Cylinder block brake for a hydrostatic drive apparatus Grant 7,134,276 - Langenfeld , et al. November 14, 2 | 2006-11-14 |
| Zero turn transaxle Grant 7,127,889 - Bennett , et al. October 31, 2 | 2006-10-31 |
| Diagnostic system for a hydrostatic transmission or transaxle Grant 7,111,457 - Langenfeld , et al. September 26, 2 | 2006-09-26 |
| Return to neutral device for a hydraulic apparatus Grant 7,111,545 - Langenfeld September 26, 2 | 2006-09-26 |
| Hydraulic motor apparatus Grant 7,081,061 - Langenfeld , et al. July 25, 2 | 2006-07-25 |
| Zero turn transaxle Grant 7,047,736 - Langenfeld , et al. May 23, 2 | 2006-05-23 |
| Combined check valve and pressure relief valve Grant 7,028,708 - Langenfeld , et al. April 18, 2 | 2006-04-18 |
| Hydraulic motor apparatus Grant 6,997,839 - Langenfeld , et al. February 14, 2 | 2006-02-14 |
| Return to neutral device for a hydraulic apparatus Grant 6,964,164 - Langenfeld November 15, 2 | 2005-11-15 |
| Pump and center section for hydrostatic transmission Grant 6,880,448 - Langenfeld April 19, 2 | 2005-04-19 |
| Zero turn transaxle Grant 6,843,056 - Langenfeld , et al. January 18, 2 | 2005-01-18 |
| Hydraulic motor apparatus Grant 6,840,879 - Langenfeld , et al. January 11, 2 | 2005-01-11 |
| Hydraulic motor apparatus and vehicle Grant 6,811,510 - Langenfeld , et al. November 2, 2 | 2004-11-02 |
| Hydraulic motor apparatus including brake mechanism Grant 6,811,509 - Langenfeld , et al. November 2, 2 | 2004-11-02 |
| Hydrostatic transmission bypass latch Grant 6,804,958 - Poplawski , et al. October 19, 2 | 2004-10-19 |
| Differential lock mechanism Grant 6,780,137 - Langenfeld August 24, 2 | 2004-08-24 |
| Return to neutral device for a hydraulic apparatus Grant 6,701,825 - Langenfeld March 9, 2 | 2004-03-09 |
| Pump and center section for hydrostatic transmission Grant 6,675,696 - Langenfeld January 13, 2 | 2004-01-13 |
| Zero turn transaxle Grant 6,672,058 - Langenfeld , et al. January 6, 2 | 2004-01-06 |
| Axle driving apparatus having an improved hydraulic fluid bypass mechanism Grant 6,550,244 - Langenfeld April 22, 2 | 2003-04-22 |
| Hydrostatic transmission bypass latch Grant 6,374,604 - Poplawski , et al. April 23, 2 | 2002-04-23 |
| Axle driving apparatus having an improved hydraulic fluid bypass mechanism Grant 6,370,876 - Langenfeld April 16, 2 | 2002-04-16 |
| Control device for hydrostatic apparatus Grant 6,253,637 - Hauser , et al. July 3, 2 | 2001-07-03 |
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