Retractable gas line connecting apparatus
US3970103A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jan 2, 1974 |
| Grant date | Jul 20, 1976 |
| Priority date | — |
| Expiry date | Jan 2, 1994 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T137/6977
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
Apparatus for connecting a ceiling terminating gas line to an item of equipment at floor level, which includes, a tubular outer member having a gas inlet end for connection to the ceiling outlet and a gas outlet end, a tubular piston rod, of substantially the same length as the outer tube, telescopically mounted in the outer tube with one end extending from the outlet end of the outer tube and having an internal diameter substantially smaller than the internal diameter in the outer tube, an annular piston mounted on the opposite end of the piston rod in the annular space between the piston rod and the outer tube which presents an annular piston surface to the opening of the gas inlet end of the outer tube and a spring mounted in the annular space between the piston rod and the outer tube having a biasing force greater than the force exerted on the piston by the gas entering the inlet end of the outer tube so that the piston is normally urged toward the inlet end of the outer tube when the apparatus is connected to the gas source. A unitary structure is provided to accommodate a plurality of different sources of gas in which a plurality of coupling elements equal in number to the nu…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.