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:
Mar. 03, 1987
Filed:
Dec. 31, 1984
Jorn Watvedt, Kvernaland, NO;
Kverneland A/S, Kvernaland, NO;
Abstract
A reversing and adjustment mechanism, especially for a reversible plough adapted for hydraulically adjustable furrow width and hydraulic reversing of the plough, wherein the reversing and adjustment mechanism comprises a hydraulic cylinder (8) with a 'hydraulic memory' for adjustment of the furrow width. The oil chambers on both sides of the ordinary piston (15) in the adjustment cylinder (8) communicate with a reservoir (24) via two pilot-controlled check valves (26, 25) with open passage toward the adjustment cylinder (8) and a second direction-control valve (10). The chamber (31) in the adjustment cylinder (8) between the rear head and a freely movable piston (17) communicates on the one hand with a hydraulic cylinder (7) for reversing the plough, preferably with the rod end thereof, via a first check valve (14) with open passage toward the reversing cylinder (7), and on the other hand communicates with the reservoir (24) via a flow-control valve (28) and a first direction-control valve (9). The reversing cylinder (7), on the end opposite its rod; i.e., preferably on the piston end, communicates on the one hand with the rod end of the adjustment cylinder (8) via a pilot-controlled check valve (36) with open passage toward the reversing cylinder (7) and a pilot-controlled check valve (32) with open passage toward the adjustment cylinder (8), and on other hand communicates with the reservoir (24) via a pilot-controlled check valve (36), the reversible flow-control valve (28) and a first direction-control valve (9).