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:
Feb. 10, 1976
Filed:
Mar. 05, 1974
James J Pancook, Tonawanda, NY (US);
Ralph L Weisbeck, Williamsville, NY (US);
Unipunch Products, Inc., Buffalo, NY (US);
Abstract
A press frame includes upper and lower arm portions forming a recess therebetween for receiving a workpiece that is supported by a worktable mounted on the lower arm portion. A ram housing is supported at the front of the upper arm portion and is provided with a ram punch connected to a power source for reciprocating the ram toward and away from the worktable. A swing arm is connected to the upper arm portion in the recess of the press frame by a vertical shaft and is arranged to pivot in a horizontal plane with respect to the upper arm portion with the shaft. A tool holder is releasably engaged to the end of the swing arm by a locking device and is provided with a vertical bore for receiving a punch tool. A cooperating die is supported in the worktable, and when the tool holder and the swing arm are positioned in punching position, the punching tool is vertically aligned between the ram and the die so that the tool holder vertically guides the punch tool toward and away from the die as the ram delivers an impact blow to the punch tool. A fluid actuated device rigidly retains the swing arm and the attached tool holder in punching position with respect to the die. When the swing arm is locked in punching position, the punch circuit is completed and thereafter is selectively energized either manually or automatically to initiate a punching stroke of the ram. To facilitate a tool and die change, the fluid actuated device operably releases the swing arm from engagement with the upper arm portion permitting the swing arm to pivot laterally in a horizontal plane out of punching position. The punching apparatus is rendered inoperable until the swing arm is returned to punching position with the die.