Electric motor for driving elements of motor vehicles in two opposite directions with a higher resisting force in one direction than in the other, such as window raisers or pivotal seat backs
US4618794A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Mar 25, 1985 |
| Grant date | Oct 21, 1986 |
| Priority date | — |
| Expiry date | Mar 25, 2005 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE05Y2900/55
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
The electric motor is of the type in which the speed of rotation as a function of the resisting torque is different in one direction of rotation than in the other, and comprises a pair of brushes (B1, B2) placed between field poles (P1, P2) and cooperative with an armature structure consisting of a commutator (14) rigid with an armature support (12) through which the shaft of the motor extends and in which are formed slots in which are wound wires connecting a series of strips (1,2 . . . ) of which the commutator (14) is formed, wherein each plane (L) containing the geometric axis (XX) of the motor and passing through the middle of a strip (1,2 . . . 8) of the commutator (14) halfway between two consecutive slots (15) of the commutator is offset by a given angle .beta. relative to the corresponding plane (K) passing through two diametrically opposed slots (B,F) of the armature support (12) in the direction of rotation (R) of the motor employed for the rising of the driven element.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.