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:
Jan. 16, 1996
Filed:
Sep. 29, 1994
Applicant:
Inventors:
Assignee:
SMC Kabushiki Kaisha, Tokyo, JP;
Primary Examiner:
Int. Cl.
CPC ...
B65G / ;
U.S. Cl.
CPC ...
1987507 ; 1984688 ;
Abstract
A balancer is installed with a frame directed substantially vertically. When an electric motor is energized, a ball screw shaft is rotated about its own axis, displacing a table mechanism in a substantially vertical direction. Simultaneously, a cylinder in the frame is operated to move a piston substantially vertically. At this time, magnets on the piston and magnets in the table mechanism are magnetically attracted to each other, so that the table mechanism is pulled in the same direction as the piston. Consequently, the burden on the electric motor which is loaded by the weight of a workpiece carried by the table mechanism is lessened.