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:
Nov. 06, 1990
Filed:
Feb. 14, 1989
Applicant:
Inventor:
Donald F Meister, Overland Park, KS (US);
Assignee:
Target Products Inc., Kansas City, MO (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
E01C / ;
U.S. Cl.
CPC ...
299-1 ; 299 39 ;
Abstract
A machine for cutting spaced grooves in a concrete road surface includes at least two laterally-spaced hydraulic cylinders which apply downward operating forces on a travelling cutter head. Each cylinder is individually pressurized through a pressure line that incorporates a pressure reducing valve and a pressure relief valve. The pressure setting for the relief valve is slightly higher than the setting of the reducing valve, such that the cylinder pressure is closely maintained between a high limit established by the relief valve and a low limit established by the reducing valve.