Tool driving or impacting – Automatic control of power operated means – Drive means responsive to torque or speed condition
Patent
1991-10-30
1993-02-16
Yost, Frank T.
Tool driving or impacting
Automatic control of power operated means
Drive means responsive to torque or speed condition
173165, 173218, 29822, 81470, B25B 2314
Patent
active
051862620
ABSTRACT:
An electro-hydraulically operated tool apparatus installs and removes bolts of track shoes for assembling and disassembling endless track assemblies. In the assembly procedure, a wrench of the tool apparatus engages the head portion of a track shoe bolt and rotates the bolt in a clockwise direction at a relatively high speed to thread a nut onto the bolt and secure the track shoe to the track chain. The tool apparatus senses the torque and at a pre-set level, a transmission of the apparatus automatically shifts to rotate the wrench at a relatively low speed. At this point, the tool apparatus starts measuring the angle of rotation, and at a pre-determined angle of about 120.degree., the wrench stops rotating. The rotation of the bolt an additional 120.degree. after the pre-torque level is reached applies the desired torque value to the bolted joint. In the disassembly procedure, the wrench engages the head portion of the bolt and applies a large down pressure to the bolt. The wrench then rotates the bolt in a counterclockwise direction at low speed and high torque. When the torque value drops, the transmission automatically shifts to high speed to rapidly remove the bolt.
REFERENCES:
patent: Re29444 (1977-10-01), Alexander
patent: 3576217 (1971-04-01), Schaedler
patent: 3827506 (1974-08-01), Himmelstein et al.
patent: 3955662 (1976-05-01), Thackston
patent: 4091451 (1978-05-01), Weiner et al.
patent: 4106570 (1978-08-01), Eshghy et al.
patent: 4167058 (1979-09-01), Janssen
patent: 4223555 (1980-09-01), Alexander
patent: 4286458 (1981-09-01), Alexander
patent: 4403663 (1983-09-01), Janssen
patent: 4535850 (1985-08-01), Alexander
patent: 4938109 (1990-07-01), Torres et al.
patent: 5005654 (1991-04-01), Moriki et al.
patent: 5067567 (1991-11-01), Webster
Caterpillar Inc.
Smith Scott A.
White Claude F.
Yost Frank T.
LandOfFree
Powered tool apparatus does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Powered tool apparatus, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Powered tool apparatus will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2142271