Seal for spray gun
US5364033A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jul 6, 1993 |
| Grant date | Nov 15, 1994 |
| Priority date | — |
| Expiry date | Jul 6, 2013 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB05B1/3046
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A seal assembly for providing multiple fluid tight seals about a valve needle or other axially moveable shaft, such as a valve needle in a spray gun. The seal assembly is disposed in a chamber through which the shaft passes. Two conical sealing surfaces are formed co-axially about the shaft at either end of the chamber. Two packing members are urged apart by a spring, each packing member being urged into a respective conical recess formed by one of the sealing surfaces and the shaft. Each packing member seals against one of the sealing surfaces and against the outer periphery of the shaft. A packing member may be formed to provide multiple stage sealing by providing a collar which causes a second end on the packing member to seal with the shaft.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.