The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Aug. 07, 2001
Filed:
Jun. 27, 1997
Robert Moffett, Clontibret, IE;
Carol Moffett, Clontibret, IE;
James McAdam, Clontibret, IE;
Paul Quinn, Castleblaney, IE;
Gerard McHugh, Carrickmacross, IE;
Gerard Harte, Castleblaney, IE;
Andrew Wylie, Ballybay, IE;
Martin McVicar, Killybrone, IE;
Thomas Cadden, Monaghan, IE;
Moffett Research and Development Limited, Clontibret, IE;
Abstract
A hydraulic drive system incorporating a hydraulic pump for three wheeled vehicles such as “piggy back” forklifts in which there are at least two separate but linked drives forming one drive unit for each of the wheels and each drive has a separate input and output. Valving is provided to provide both parallel and series operation of the system for optimum torque, speed and anti skid operation. In one preferred way of carrying out the invention a single drive unit feeds one of the drives of each of the other drives. The hydraulic pump feeds the single drive unit and one of the drives of the other transverse drive units. By-pass diverter valves are fitted across the drives of the transverse drive units.