Flexible pipe coupling
US5056833A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Sep 11, 1989 |
| Grant date | Oct 15, 1991 |
| Priority date | — |
| Expiry date | Sep 11, 2009 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16L25/14
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A resiliently flexible pipe coupling for interconnecting two pipe ends in a pressure-tight manner includes a tubular sealing sleeve of resilient flexible material, and an adjustable tubular metal casing for clamping the sealing sleeve around the pipe ends. The sealing sleeve includes a tubular web portion and sealing lips integral with the web portion. The sealing lips are formed in adjoining relationship relative to the web portion and define free ends of the sealing sleeve. The sealing lips extend radially inwardly from the web portion and are spaced apart longitudinally. Each sealing lip includes a radially inner pipe-engaging surface for engaging one of the pipe ends, and the pipe-engaging surface of one of the lips has a substantially different internal diameter from the pipe-engaging surface of the other lip, whereby the coupling is adapted to connect two pipe ends of different external diameter. The web portion is radially thicker in the region of the lip of smaller internal diameter than in the region of the lip of greater internal diameter. This permits the axially inwardly facing surfaces of the respective lips to have substantially the same surface area.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.