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. 22, 1994
Filed:
Sep. 03, 1992
Toyota Jidosha Kabushiki Kaisha, Aichi, JP;
Abstract
A hydraulic cushioning apparatus for a press, having work-supporting pressure pins, hydraulic cylinders linked with the pressure pins, and a fluid passage connecting a hydraulic power supply to the hydraulic cylinders, to apply a preset hydraulic pressure to the cylinders. The apparatus includes a shut-off valve disposed in the fluid passage for connection and disconnection of the hydraulic power supply to and from the hydraulic cylinders, and a controller for controlling the shut-off valve such that the shut-off valve is closed before a movable die of the press comes into pressing contact with the workpiece, and is held in the closed position for at least a period which expires when the fluid in the hydraulic cylinders rises to the preset pressure level.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile