IP Library › Granted Patent US 12,503,016
Granted Patent B2
US 12,503,016 · App. 18/378,770 · Granted Dec 23, 2025

Vehicle seat adjustment assembly with reduced-backlash gear system

Inventors: Mircea Napau (Sterling Heights, MI); Ileana Dacia Napau (Cugir, RO); Ioan Napau (Rochester Hills, MI)
Assignee: Fisher & Company, Incorporated
B60N2/165B60N2/02246B60N2/14B60N2/2251B60N2/12
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Quick Facts
Patent No.
US 12,503,016
App. No.
18/378,770
Granted
Dec 23, 2025
Kind
B2
Abstract

A seat adjustment mechanism includes a first component and a second component movable relative to the first component. A drive mechanism is drivingly connected to the second component for moving the second component relative to the first component. The drive mechanism includes a drive motor drivingly connected to a first gear member having conical involute teeth. A second gear member includes conical involute teeth in meshing engagement with the conical involute teeth of the first gear member. The conical involute teeth have a tapered tooth thickness, a tapered root and a tapered outside diameter.

Claims (34)

1 . A vehicle seat adjustment mechanism, comprising:

a first component;

a second component movable relative to the first component;

a drive mechanism drivingly connected to the second component for moving the second component relative to the first component, the drive mechanism including a first gear member having conical involute teeth, the first gear member drivingly connected to a drive motor, a second gear member having conical involute teeth in meshing engagement with the conical involute teeth of the first gear member; and

a resilient member allowing adjustment of one of the first gear member and the second gear member relative to the other of the first gear member and the second gear member,

wherein the drive mechanism includes a gear reduction mechanism providing a driving connection between the drive motor and the first gear member,

wherein the gear reduction mechanism includes an eccentric rotatably connected to the drive motor and a locking plate that engages the eccentric and one of a planetary gear and a ring gear and the other of the planetary gear and the ring gear is drivingly connected to the first gear member,

wherein the planetary gear includes exterior conical involute teeth and the ring gear includes interior conical involute teeth.

2 . The vehicle seat adjustment mechanism according to claim 1 , wherein the first gear member is a pinion gear.

3 . The vehicle seat adjustment mechanism according to claim 2 , wherein the second gear member is a sector gear.

4 . The vehicle seat adjustment mechanism according to claim 3 , wherein the first component is a seat base and the second component is a seat bottom.

5 . The vehicle seat adjustment mechanism according to claim 2 , wherein the second gear member is a rack.

6 . The vehicle seat adjustment mechanism according to claim 5 , wherein the first component is a rail and the second component is a slide unit on which a seat base is mounted.

7 . The vehicle seat adjustment mechanism according to claim 2 , wherein the second gear member is a ring gear.

8 . The vehicle seat adjustment mechanism according to claim 7 , wherein the first component is a vehicle floor and the second component is a seat that is swivelable relative to the vehicle floor.

9 . The vehicle seat adjustment mechanism according to claim 8 , wherein the ring gear includes interior conical involute teeth.

10 . The vehicle seat adjustment mechanism according to claim 8 , wherein the ring gear includes exterior conical involute teeth.

11 . The vehicle seat adjustment mechanism according to claim 1 , wherein the first component is a seat bottom and the second component is a seat back and the drive mechanism is a recliner mechanism for moving the seat back relative to the seat bottom.

12 . The vehicle seat adjustment mechanism according to claim 1 , wherein the first component is a rail and the second component is a slide unit on which a seat base is mounted and the drive mechanism is a seat adjustment mechanism for moving the slide unit relative to the rail.

13 . The vehicle seat adjustment mechanism according to claim 1 , wherein the resilient member is a wave spring.

14 . The vehicle seat adjustment mechanism according to claim 1 , wherein the resilient member is made from a resilient material.

15 . The vehicle seat adjustment mechanism according to claim 1 , wherein the locking plate engages two pins on the one of the planetary gear and the ring gear.

16 . A vehicle seat adjustment mechanism, comprising:

a first component;

a second component movable relative to the first component;

a drive mechanism drivingly connected to the second component for moving the second component relative to the first component, the drive mechanism including a first gear member having conical involute teeth, the first gear member drivingly connected to a drive motor, a second gear member having conical involute teeth in meshing engagement with the conical involute teeth of the first gear member; and

a resilient member allowing adjustment of one of the first gear member and the second gear member relative to the other of the first gear member and the second gear member,

wherein the drive mechanism includes a gear reduction mechanism providing a driving connection between the drive motor and the first gear member, and

wherein the gear reduction mechanism includes an eccentric rotatably connected to the drive motor and engaged with a wobbling planetary gear with exterior conical involute teeth that engage interior conical involute teeth of a ring gear that is drivingly connected to the first gear member, the wobbling planetary gear including a locking plate with at least two guiding holes that each receive a respective cylindrical pin mounted to a housing of the gear reduction mechanism.

17 . The vehicle seat adjustment mechanism according to claim 16 , wherein the wobbling planetary gear includes three guiding holes that each receive a respective cylindrical pin mounted to the housing of the gear reduction mechanism.

18 . The vehicle seat adjustment mechanism according to claim 16 , wherein the first gear member is a pinion gear, wherein the second gear member is a sector gear, and wherein the first component is a seat base and the second component is a seat bottom.

19 . The vehicle seat adjustment mechanism according to claim 16 , wherein the gear reduction mechanism includes an eccentric rotatably connected to the drive motor and a locking plate that engages the eccentric and one of a planetary gear and a ring gear and the other of the planetary gear and the ring gear is drivingly connected to the first gear member.

20 . The vehicle seat adjustment mechanism according to claim 16 , wherein the first gear member is a pinion gear, wherein the second gear member is a rack, and wherein the first component is a rail and the second component is a slide unit on which a seat base is mounted.

21 . The vehicle seat adjustment mechanism according to claim 16 , wherein the first gear member is a pinion gear, wherein the second gear member is a ring gear, wherein the first component is a vehicle floor and the second component is a seat that is swivelable relative to the vehicle floor, and wherein the ring gear includes conical involute teeth.

Assignments (2)
SECURITY INTEREST Recorded Nov 20, 2025
From: FISHER & COMPANY, INCORPORATED; GRA-MAG TRUCK INTERIOR SYSTEMS, L.L.C.
To: JPMORGAN CHASE BANK, N.A.
Reel/Frame 073652/0456 →
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Oct 20, 2023
From: NAPAU, MIRCEA; NAPAU, ILEANA DACIA; NAPAU, IOAN
To: FISHER & COMPANY, INCORPORATED
Reel/Frame 065291/0160 →
Continuity (2)
Provisional Application 63415483 · Oct 12, 2022
Related Publication 20240131966A1 · Apr 25, 2024
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