Apparatus for making threaded joints incorporating a make-up speed controller
US4402052A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Apr 10, 1981 |
| Grant date | Aug 30, 1983 |
| Priority date | — |
| Expiry date | Apr 10, 2001 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T29/53687
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
An apparatus is provided for controlling the speed of rotation of a joint member during the operation of making a threaded joint. At lower speeds of rotation, a counter means receives clock pulses generated at a predetermined frequency and counts down from a stored value representing the elapsed time for a maximum rate at which turn signal pulses generated during predetermined increments of rotation of the joint member should be generated. If the elapsed time between the turn signal pulses is less than or equal to the stored time, a signal is generated to slow down the joint making operation. At higher speeds of rotation, a counter means receives the turn signal pulses and counts down from a stored value representing the maximum number of turn signal pulses which should be generated in a predetermined time interval. If the turn signal pulse total exceeds the maximum number during the predetermined time interval, the slow down signal is generated.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.