Method and device for connecting pipe components made of weldable plastic
US4349397A · kind A · utility
Inventor
Key dates
| Filing date | Dec 24, 1978 |
| Grant date | Sep 14, 1982 |
| Priority date | — |
| Expiry date | Dec 24, 1998 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB29C66/961
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
Pipe components, i.e., pipes, adapting members and fittings made of weldable plastic, are interconnected by electrically weldable joints. The welding process is made possible by a welding sleeve 3 being connected to the output 4 of the device. A switch-on monitor 11 permits the switching on of a switch stage 7 of the welding current circuit. The thermal energy is determined by square-law simulation of the welding or mains voltage in a pulse generator 9, which produces a pulse frequency which is dependent on this value and whose pulses are summed in a counter 10. Once a count value that corresponds to the thermal energy has been reached, the switch stage 7 is switched off. If the count value is not reached a function monitor 5 gives a warning signal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.