Multi-stage tightening system

Details Multi-stage tightening system Multi-stage tightening system

1974-09-19

1976-06-29

Jones, Jr., James L.

Tools

Wrench, screwdriver, or driver therefor

173 12, B25B 23142

Patent

active

039657787

ABSTRACT:
A sequential tightening system is disclosed in this application for tightening a plurality of fasteners to a final predetermined condition and includes a plurality of wrenches for tightening the fasteners and a control system operatively associated with each of said wrenches for tightening the fasteners to a first predetermined condition, preferably their seated condition and at a relatively high output speed of the wrenches, and temporarily discontinuing the tightening procedure. When the tightening procedure of all of the wrenches has been temporarily discontinued, the control means restarts the tightening procedure of each wrench simultaneously or, if desired, sequentially, and, preferably at a lower output speed of the wrenches. As each wrench tightens its operatively engaged fastener to the final predetermined condition, the control means discontinues the tightening procedure of that wrench.

REFERENCES:
patent: 2691314 (1954-10-01), Stevens et al.
patent: 2720803 (1955-10-01), Rice et al.
patent: 2781682 (1957-02-01), Herndon
patent: 2796789 (1957-06-01), Rice et al.
patent: 3180612 (1965-04-01), Spyridakis
patent: 3319494 (1967-05-01), Ulbing

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