Boots – shoes – and leggings
Patent
1994-09-01
1996-05-21
Trammell, James P.
Boots, shoes, and leggings
36447415, G05B 902
Patent
active
055196047
ABSTRACT:
A method and a device for tightening threaded joints to a desired pretension level using a manually operated power nutrunner and controlling the tightening process by determining, during a tensioning phase, the instantaneous growth per time unit of the torque resistance from the joint, and adapting continuously the rotation speed of the nutrunner in relation to the determined instantaneous torque growth per time unit so as to obtain the same reaction force characteristics in the nutrunner handle for all joints, regardless of differences in torque resistance growth per angle of rotation between the joints.
REFERENCES:
patent: 4510424 (1985-04-01), Doniwa
patent: 4908926 (1990-03-01), Takeshima et al.
patent: 4987806 (1991-01-01), Lehnert
patent: 4995145 (1991-02-01), Eshghy
patent: 5062491 (1991-11-01), Takeshima et al.
patent: 5094301 (1992-03-01), Wipperman et al.
patent: 5152046 (1992-10-01), Abe
patent: 5205031 (1993-04-01), Hansson
patent: 5215270 (1993-06-01), Udocon et al.
patent: 5216795 (1993-06-01), Hansson
patent: 5229931 (1993-07-01), Takeshima et al.
patent: 5245747 (1993-09-01), Hansson
patent: 5285857 (1994-02-01), Shimada
Patent Abstracts of Japan, vol. 16, No. 534 (M-1334) Nov. 4, 1992 & JP-A-04 201 022 (Sanyo Mach Works Ltd) Jul. 22, 1992, Screw Fastening by Multi-Nut Runner.
Atlas Copco Tools AB
Trammell James P.
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