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:
Apr. 16, 2002
Filed:
Aug. 08, 2000
Ronald Olsson, Savedalen, SE;
Sverker Alfredsson, Vastra Frolunda, SE;
Stig-Erik Johannesson, Kungalv, SE;
Volvo Lastvagnar AB, Gothenburg, SE;
Abstract
A vehicle gearbox includes a basic gearbox with a main shaft that is an input shaft to a high-low range gearset joined to the basic gearbox. The basic gearbox has a control shaft, which, rotated in either direction from a neutral position, engages a selected gear. The control shaft is coordinated with a lock-out device which is controlled by a first sensor, which senses the speed of the output shaft from the range gearbox, and a second sensor which senses the engaged range in the range gearbox. An operating device holds the lock-out device in a lock-out position which prevents rotation of the control shaft towards the position for the lowest synchronized gear in the basic box, when the vehicle speed exceeds a predetermined speed in the low range of the gearbox.