Fitting for adjustably connecting a backrest member to a seat member
First Claim
1. A fitting for adjustably connecting a backrest part to a seat part of a seat, especially a seat of an automotive vehicle, said fitting comprising:
- a backrest mounting member connectable to said backrest part;
a seat mounting member connectable to said seat part;
a ring gear on one of said members and having a predetermined number of inwardly directed teeth centered on a ring-gear axis;
a spur gear on the other of said members inside said ring gear and having a number less than said predetermined number by at least one of outwardly directed teeth centered on a spur-gear axis radially offset from said ring-gear axis;
turning means for displacing said spur gear for orbiting said spur-gear axis about said ring-gear axis with said outwardly directed teeth meshing with said inwardly directed teeth and said spur-gear rolling in said ring gear, whereby the relative angular position of said members is varied by such displacement; and
eccentric means for increasing and decreasing the radial offset between said axes while always maintaining at least one of said outwardly directed teeth in mesh with at least some of said inwardly directed teeth.
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Accused Products
Abstract
A first mounting member can be secured to a backrest member of a seat, such as a seat of an automotive vehicle, and a second mounting member can similarly be secured to the seat member of the seat. A ring gear is provided on one of the mounting members and has inwardly directed teeth, and the other mounting member has a spur gear received within the ring gear and having outwardly directed teeth which mesh with play with the inwardly directed teeth. The spur gear has an outer diameter smaller than the root diameter of the ring gear by at least the height of one tooth and the number of inwardly directed teeth is different from the number of outwardly directed teeth by at least one. An eccentric arrangement is provided, extending through the gears and being movable to and from a position in which it effects relative radial displacement of the gears to such an extent as to eliminate the aforementioned play.
32 Citations
17 Claims
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1. A fitting for adjustably connecting a backrest part to a seat part of a seat, especially a seat of an automotive vehicle, said fitting comprising:
- a backrest mounting member connectable to said backrest part;
a seat mounting member connectable to said seat part;
a ring gear on one of said members and having a predetermined number of inwardly directed teeth centered on a ring-gear axis;
a spur gear on the other of said members inside said ring gear and having a number less than said predetermined number by at least one of outwardly directed teeth centered on a spur-gear axis radially offset from said ring-gear axis;
turning means for displacing said spur gear for orbiting said spur-gear axis about said ring-gear axis with said outwardly directed teeth meshing with said inwardly directed teeth and said spur-gear rolling in said ring gear, whereby the relative angular position of said members is varied by such displacement; and
eccentric means for increasing and decreasing the radial offset between said axes while always maintaining at least one of said outwardly directed teeth in mesh with at least some of said inwardly directed teeth. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17)
- a backrest mounting member connectable to said backrest part;
Specification