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:
Jun. 29, 1999
Filed:
May. 26, 1998
Steve K Yates, Scotland, PA (US);
Edward D Magalski, York, PA (US);
Keith Williams, Minnetonka, MN (US);
Ingersoll-Rand Company, Woodcliff Lake, NJ (US);
Abstract
An earth compactor is propelled by a hydraulic circuit that includes a first hydraulic motor to drive a drum member and a second hydraulic motor to drive a tractor member mounted on tires, with a traction control system that includes a motor speed sensing device on each hydraulic motor. The speed sensing devices transmit electrical signals to a microcontroller, which compares the speeds and varies the speed of the tires or drum to maintain a preselected ratio between the two, thereby maintaining traction of both members. The compactor includes a ground slope sensing device which generates electrical signals and transmits the signals to the microcontroller such that, whenever the tires become elevated above the drum, the microcontroller lowers the speed of the tires and the drum to prevent tire hop.