ROBERT J FINKELSTON
Engineers in Colmar, PA
License number
Pennsylvania PE024963E
Category
Engineers
Type
Professional Engineer
Address
Address
Colmar, PA 18915
Professional information
Apparatus And Method For Tightening An Assembly
US Patent:
4344216, Aug 17, 1982
Filed:
Dec 10, 1979
Appl. No.:
6/101975
Inventors:
Robert J. Finkelston - Colmar PA
Assignee:
SPS Technologies, Inc. - Jenkintown PA
International Classification:
B23P 1906
US Classification:
29407
Abstract:
Apparatus and method for tightening assemblies held together by threaded fasteners. The desired tightened condition is achieved by turning the threaded fastener through a precise tightening angle required to induce a predetermined preload in the threaded fastener and calculated from input parameters characteristic of the assembly being tightened and the predetermined preload. The tightening angle is measured from the onset of linearity of the preload-rotation curve for the assembly by sensing the onset of the substantially linear tightening portion of the torque-rotation curve through which the assembly is taken as it is being tightened.