The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Nov. 21, 1989
Filed:
Feb. 01, 1989
Juichiro Takada, Setagaya-ku, Tokyo, JP;
Other;
Abstract
A drive device for a vehicle passive safety belt system comprises a first rotatable drum, a flexible drive tape having one end affixed to the first drum and leading from the first drum along a constrained path to a belt guide that is movable along a guide rail in the vehicle, a second rotatable drum positioned adjacent the path of the drive tape and proximate to the first drum, a flexible driving band having one end affixed to the first drum and its other end affixed to the second drum, the driving band overlapping the drive tape and being arranged to wind onto the second drum while unwinding from the first drum conjointly with the drive tape and to keep the drive tape from slackening on the first roll upon unwinding, and a drive device for conjointly rotating the first and second drums in one direction to wind the driving band into the second drum and unwind the drive tape and the driving band from the first drum and in the opposite direction to wind the drive tape and driving band onto the first drum and unwind the driving band from the second drum. A spring coupled between the first drum and the drive device biases the first drum in said opposite direction relative to the drive device and yields to enable the first drum to rotate at a speed different from the drive device. A lost motion coupling between the second drum and the drive device and adapted to couple the drive device to the first drum upon rotation in said one direction permits free rotation of the second drum within a predetermined range relative to the drive device upon rotation in said opposite direction.