Power tongs control system

Details Power tongs control system Power tongs control system

1983-04-21

1985-11-12

Jones, Jr., James L.

Tools

Wrench, screwdriver, or driver therefor

Responsive to torque on work

B25B 2314

Patent

active

045520410

ABSTRACT:
The power tongs control system described herein includes a hydraulic load transducer in the tongs snub line, the transducer output controlling a shunt valve between the hydraulic lines leading to and from the tongs drive motor. At a predetermined threshold tongs torque, a switch is actuated by contact with a Bourdon tube connected to the transducer output closure of the switch causing the solenoid actuator to open the shunt valve and thereby halt operation of the tongs. A timer is provided to maintain the tongs in the disabled configuration for a period of time following initial cut off. Also disclosed is an adjustable choke valve in series with the shunt valve so that even following the opening of the shunt valve, substantial torque is maintained upon the pipe by the tongs.

REFERENCES:
patent: 3693727 (1972-09-01), Bell
patent: 3719237 (1973-03-01), Flick
patent: 3745820 (1973-07-01), Weiner
patent: 3768573 (1973-10-01), Jennings
patent: 4091451 (1978-05-01), Weiner et al.
patent: 4176436 (1979-12-01), McCombs et al.
patent: 4199032 (1980-04-01), Weiner et al.
patent: 4305472 (1981-12-01), Brossette

Affiliated with

Also associated with

Rating

Power tongs control system does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Power tongs control system, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Power tongs control system will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1873922