TL

Thomas J. Langenfeld

HP Hydro-Gear Limited Partnership: 94 patents #2 of 96Top 3%
📍 Sullivan, IL: #2 of 51 inventorsTop 4%
🗺 Illinois: #194 of 84,256 inventorsTop 1%
Overall (All Time): #16,128 of 4,157,543Top 1%
95
Patents All Time

Issued Patents All Time

Showing 76–95 of 95 patents

Patent #TitleCo-InventorsDate
7081061 Hydraulic motor apparatus Raymond Hauser, Matthew C. Roney 2006-07-25
7047736 Zero turn transaxle Matthew C. Roney, Shane A. Deters, Daryl Smothers, J. David Pratt, Raymond Hauser 2006-05-23
7028708 Combined check valve and pressure relief valve Matthew C. Roney, Robert E. Trimble 2006-04-18
6997839 Hydraulic motor apparatus Raymond Hauser, Matthew C. Roney 2006-02-14
6964164 Return to neutral device for a hydraulic apparatus 2005-11-15
6880448 Pump and center section for hydrostatic transmission 2005-04-19
6843056 Zero turn transaxle Matthew C. Roney, Shane A. Deters, Daryl Smothers, J. David Pratt, Raymond Hauser 2005-01-18
6840879 Hydraulic motor apparatus Raymond Hauser 2005-01-11
6811509 Hydraulic motor apparatus including brake mechanism Shane A. Deters 2004-11-02
6811510 Hydraulic motor apparatus and vehicle Raymond Hauser, Matthew C. Roney 2004-11-02
6804958 Hydrostatic transmission bypass latch Herb Poplawski, Raymond Hauser, John Schreier 2004-10-19
6780137 Differential lock mechanism 2004-08-24
6701825 Return to neutral device for a hydraulic apparatus 2004-03-09
6675696 Pump and center section for hydrostatic transmission 2004-01-13
6672058 Zero turn transaxle Matthew C. Roney, Shane A. Deters, Daryl Smothers, Raymond Hauser 2004-01-06
6550244 Axle driving apparatus having an improved hydraulic fluid bypass mechanism 2003-04-22
6374604 Hydrostatic transmission bypass latch Herb Poplawski, Raymond Hauser, John Schreier 2002-04-23
6370876 Axle driving apparatus having an improved hydraulic fluid bypass mechanism 2002-04-16
6253637 Control device for hydrostatic apparatus Raymond Hauser, William H. Ward 2001-07-03
6122996 Hydrostatic transmission Raymond Hauser, Craig Wigness, William H. Ward 2000-09-26