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:
Dec. 31, 1991
Filed:
Feb. 22, 1991
Peter K Lo, Taipei, TW;
Other;
Abstract
A magnetic resistance type exercise unit includes a frame assembly, a first rotating shaft journaled on the frame assembly, a rope sheave rotatably actuating the first rotating shaft, a rope wound around the rope sheave and having one end secured to the rope sheave, a handle secured to the other end of the rope so as to rotate the rope sheave by pulling the rope away from the rope sheave, a spiral spring connected to the rope sheave to rewind the rope about the rope sheave, a second rotating shaft journaled on the frame assembly and rotated by the first rotating shaft, a rotary plate rigidly sleeved on the second rotating shaft and made of an electrical conducting material, and a permanent magnet member mounted on the frame assembly adjacent to the rotary plate and having a pair of oppositely polarized and aligned ends disposed on opposite sides of the rotary plate. When in use, the rotary plate cuts into a nonuniform magnetic field caused by the permanent magnet member to thereby induce eddy currents in the rotary plate. The eddy currents induced in the rotary plate generate a retarding force that opposes the motion of the rotary plate through the magnetic field.