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:
Jun. 17, 1997
Filed:
Jan. 25, 1996
Edward Daniel, Fort Loramie, OH (US);
The Minster Machine Company, Minster, OH (US);
Abstract
The invention pertains to a press comprising, a drive mechanism, a slide and at least two connecting rods connecting between the drive mechanism and the slide for reciprocally driving the slide. At least two fluid valves are connected to respective connecting rods and manifolded together with a hydraulic chamber disposed in or adjacent the connecting rods. An electrically adjustable proportional valve is connected to the fluid valves which operate to vary the pressure at which the fluid valves open to unload the slide. A variable system pressurizing mechanism for pressuring said chambers to a predetermined system pressure is utilized while the mechanism may unload the slide if pressure within a hydraulic chamber exceeds a predetermined system pressure. A variable relief mechanism automatically relieves pressure within the hydraulic chambers dependent on an operating state of the press.