Accession Number : AD0163624
Title : Automatic Clutch and Brake for Hoists.
Descriptive Note : Patent,
Corporate Author : OFFICE OF THE SECRETARY OF THE ARMY WASHINGTON D C
Personal Author(s) : Kalpas,Roland A. ; Stowe,Derek W.
Report Date : 30 MAR 1971
Pagination or Media Count : 5
Abstract : The patent relates to a mechanical load brake system having a motor in driving connection with a traveling nut threadable on the drive shaft of a hoist drum. When rotated in one direction the nut will engage an input clutch which, in turn, engages a disc brake to lock a brake housing for rotation with the drive shaft. The brake housing is prevented from rotation in both directions by a backstop brake to permit free rotation of the drive shaft during hoisting without having to overcome brake friction torque in addition to the torque required to hoist the load, and on lowering the load to hold fixed the brake housing to permit generation of a reaction torque when brake application is required. On lowering, the speed of the drive shaft is controlled by the nut which acts as a governor.
Descriptors : (*BRAKES, *PATENTS), (*HOISTS, BRAKES), CLUTCHES, STRUCTURAL MEMBERS, SPEED REGULATORS
Subject Categories : Machinery and Tools
Distribution Statement : APPROVED FOR PUBLIC RELEASE