Back to results
US 6,598,821 B2Granted
Seat belt retractor
AssigneeBreed Automotive Technology, Inc.
InventorMartin Specht
Life of this patent
Estimating the term…
Abstract
A seat belt retractor has a winding reel rotatably mounted in a frame, an electric motor and a switching mechanism, with which varying torques can be transmitted to the winding reel to adjust the comfort of a wearer of the seat belt or to tighten the seat belt. The switching mechanism is automatically directed into a switch position set for the comfort perceived by the wearer of the seat belt and into a switch position for belt tightening, in which if necessary an adjustable load limitation is also achieved.
Claims18
A seat belt retractor comprising:
- (a) a winding reel rotatably mounted in a frame;
- (b) an electric motor;
- and
- (c) a switching mechanism with which varying torques can be transmitted to the winding reel to adjust the comfort of a user of a seat belt or to tighten the seat belt, wherein the switching mechanism, depending on a change in number of revolutions or the number of revolutions with which each torque has been transmitted, can be directed into a corresponding switch position, the switching mechanism comprising a coupling device that comprises at least one engageable coupling element that, as a result of an inertial moment of a sensor mass provided at a predetermined distance from the rotational axis of a driving part, can be actuated at a certain number of revolutions or change in number of revolutions of the driving part.
1 more element
A seat belt retractor comprising
- (a) a winding reel rotatably mounted in a frame;
- (b) an electric motor;
- and
- (c) a switching mechanism with which varying torques can be transmitted to the winding reel to adjust the comfort of a user of a seat belt or to tighten the seat belt, wherein the switching mechanism comprising a coupling device, depending on a change in number of revolutions or the number of revolutions with which each torque has been transmitted, can be directed into a corresponding switch position, the coupling element can be engaged via a pre-blocking device that comprises a sensor mass, via which an engagement part, movably mounted on a driving part, can be brought into engagement with a control part, due to which the coupling element can be re-engaged while the driving part is rotating.
1 more element
Dependencies are inferred from the claim text.