Adjustments device for a motor vehicle seat with an electric motor with a gear connected thereto

• US 20090085420A1
• Filed: 09/26/2008
• Published: 04/02/2009
• Est. Priority Date: 09/27/2007
• Status: Active Grant

• Current Assignee: Keiper Seating Mechanisms Company Limited
• Original Assignee: C ROB Hammerstein GmbH & Company KG (Johnson Controls International plc)
• Inventors: Beneker, Wilfried, Becker, Burckhard, Reimann, Michael
• Granted Patent: US 7,755,233 B2
• Time in Patent Office: Days
• US Class Current: 310/83
• CPC Class Codes: B60N 2/02253 characterised by the transmission between the electric motor and the seat or seat parts
• CPC Class Codes: B60N 2/853 characterised by their adjusting mechanisms, e.g. electric motors

Abstract

An adjustment device for a motorized vehicle seat has an electric motor and a gear connected to the electric motor. The electric motor has a nominal speed of more than 12,000 rpm, in particular of more than 15,000 rpm at nominal voltage.

Claims

1. An adjustment device for a motor vehicle seat which comprises an electric motor and a gear connected to said electric motor, wherein said electric motor has a nominal speed of more than 12,000 rpm, at nominal voltage.

2. The adjustment device of claim 1, wherein said electric motor has at most half as much weight as an electric motor which has a nominal speed of approximately 3,000 to 4,000 rpm for an adjustment device.

3. The adjustment device of claim 1, wherein said electric motor is electronically commuted.

4. The adjustment device of claim 1, wherein said electric motor and said gear are within one common housing.

5. The adjustment device of claim 4, wherein said adjustment device comprises a control circuit and said control circuit is within said housing.

6. The adjustment device of claim 1, wherein said electric motor has a volume that is at the most 30% the size of an electric motor for a comparable adjustment device which electric motor has a nominal speed of 3,000 to 4,000 rpm.

7. The adjustment device of claim 1, wherein said electric motor has a weight that is at most 30% of the weight of an electric motor for a comparable adjustment device which electric motor has a nominal speed of 3,000 to 4,000 rpm.

8. The adjustment device of claim 1, wherein said electric motor meets at least one of the following conditions:

a) the diameter of a substantially cylindrical motor housing is smaller than 30 mm,

b) the length of said motor body is not greater than 50 mm or

c) the weight is less than 150 g.

9. The adjustment device of claim 1, wherein said electric motor has a nominal speed of more than 15,000 rpm at nominal voltage.

10. The adjustment device of claim 1, wherein said adjustment device comprises a control circuit.

11. The adjustment device of claim 1, wherein the length of a cylindrical motor body is not longer than 50 mm.