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Bidirectional Drive-And-Brake MechanismVehicle that crawls along monorail combines features of both bicycle and railroad handcar. Bidirectional drive-and-brake mechanism includes selectable-pawl-and-ratchet overrunning clutch (drive mechanism) and mating stationary and rotating conical surfaces pressing against each other (brake mechanism). Operates similarly to bicycle drive-and-brake mechanism except limits rotation of sprocket in both directions and brakes at both limits. Conceived for use by astronaut traveling along structure in outer space, concept also applied on Earth to make very small railraod handcars or crawling vehicles for use on large structures, in pipelines under construction, or underwater.
Document ID
19910000543
Acquisition Source
Legacy CDMS
Document Type
Other - NASA Tech Brief
Authors
Swan, Scott A.
(NASA Lyndon B. Johnson Space Center, Houston, TX.)
Date Acquired
August 14, 2013
Publication Date
October 1, 1991
Publication Information
Publication: NASA Tech Briefs
Volume: 15
Issue: 10
ISSN: 0145-319X
Subject Category
Machinery
Report/Patent Number
MSC-21540
Accession Number
91B10543
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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