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. 10, 1982
Filed:
Feb. 22, 1980
Henry J Levington, Snelland, GB;
Clayton Dewandre & Company Limited, Lincoln, GB;
Abstract
A hydraulic braking system for agricultural tractor-trailer combinations, taking hydraulic power from a pump on the tractor. The system includes a pressure control valve movable by the main hydraulic service supply to connect the main supply with a chamber in communication with a restricted bore and an outlet for the by-passed braking fluid. A pilot valve responsive to braking pressure, or manually operable, admits fluid to the trailer brakes and operates a check-valve closing a connection between the chamber and a return line for fluid not required for braking. The check valve enables a clean switching action and eliminates any tendency to meter at some intermediate pressure. Both constant flow and constant pressure systems are described. The return line may be connected to a low pressure sink or to the flow at the services outlet port preferably via another check valve.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile