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. 25, 1985
Filed:
Apr. 19, 1983
Applicant:
Inventor:
Michel A Pierrat, Andover, MA (US);
Assignee:
Other;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
F16H / ;
U.S. Cl.
CPC ...
74804 ; 7457 / ; 74805 ;
Abstract
A speed reduction mechanism having an orbital drive system. A first crank arm drives the orbital system and a second crank arm, offset by 180 degrees, carries a counterweight for counter balancing the off center forces produced by the orbital system. To minimize inertia, the counterweight is symmetrically shaped about its axis and is mounted for free rotation about the second crank arm. Such a counterweight may have a smaller degree of eccentricity and a correspondingly greater mass than a conventional counterweight, but because the inertia is a function of the square of the eccentricity of the counterweight, the inertia may be significantly less.