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. 11, 1996
Filed:
Nov. 23, 1994
Michel Orain, Conflans-Sainte-Honorine, FR;
Glaenzer Spicer, Poissy, FR;
Abstract
The four trunnions (11) transmit the rotation of the shaft (8) to the body (1) through the intermediately of four tracks (3) which oscillate by rolling without sliding on the inner wall of the body (1). In addition, each track (3) is coupled angularly with the two adjacent tracks by mating teeth (7) so that any inclination of one track produces a contrary inclination of the two adjacent tracks and consequently an inclination in the same direction of the opposite track. The radii (a, b) according to which the tracks roll against the inner wall of the body and the position of the center of gravity (G) of the tracks are such that the centrifugal force (F) returns the tracks into neutral position. The inherent oscillation frequency of the tracks under the effect of this return is equal to twice the speed of rotation of the joint. This relationship is true for every joint rotation speed because the centrifugal force is proportional to the square of the speed of rotation, and the inherent frequency is proportional to the square root of the return force, therefore proportional to the speed of rotation.