Interlocking pipe ball joint
US4132437A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Oct 18, 1976 |
| Grant date | Jan 2, 1979 |
| Priority date | — |
| Expiry date | Oct 18, 1996 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T29/4994
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A ball joint for connecting lengths of pipe particularly for use in automotive exhaust systems. One end of a first pipe is enlarged to an increased diameter to form a female portion into which one end of a second pipe is received. A tubular sleeve is inserted into said first pipe and connected thereto as by welding. The sleeve and the female portion together define an annular, axially elongated and radially narrow passage receiving said one end of said second pipe. The first and second pipes and the sleeve are together placed in a die, and the overlapping ends are spun radially outwardly by an internal, expansible arbor or the like to form a generally spherical, interlocking pipe ball joint.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.