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:
Sep. 23, 1997
Filed:
Dec. 04, 1995
Alan R Newton, East Wareham, MA (US);
Other;
Abstract
A high ratio screw actuated device used as a press to provide high pressure under small increments of movement which includes a frame or base for a housing rotatably carrying a screw having large pitch threads, a nut within said housing receiving said screw and having internal threads of the same pitch as the screw threads but a pitch diameter larger than the screw pitch diameter, a thrust/radial bearing encompassing said nut, a compression spring in said housing urging said nut downward, the free end of said screw carrying one piece of a two-piece die set, a guide rod having one end received in a socket in the frame, and a motor mounted on the guide rod for slidable movement thereof, the upper end of the screw terminating in a coupling receiving the drive end of the motor to engage the screw in rotational movement. A speed controller operated by a switch provides reversible rotation of the screw to advance and retract said screw and open and close the two-piece die, and a set screw acts to adjust the alignment of the centerlines of the screw and nut to adjust the ratio force of the press. Optionally, a torsion spring wrap clutch or resilient pawl engaging the nut outer surface prevents nut rotation in one direction which would otherwise prevent backing off of the screw.