Method of welding a spiral spring to produce a toroidal ring
US4122326A · kind A · utility
2Cited by
5References
5Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Oct 20, 1976 |
| Grant date | Oct 24, 1978 |
| Priority date | — |
| Expiry date | Oct 20, 1996 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16F1/06
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
A toroidal ring made from a spiral spring with contiguous turns, such as those used for constituting the inner core of a metal sealing ring. The ring has a weld without filling metal connecting together the two end turns of the spring, this weld being such that continuity of the wire of the spring is provided without altering the contiguous configuration of the turns and the mechanical, physical and chemical properties of the spring are substantially unchanged at this weld. The weld can advantageously be effected by a resistance weld performed with a pulse of electric current.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.