Paint discharge control device
US4938253A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jul 17, 1985 |
| Grant date | Jul 3, 1990 |
| Priority date | — |
| Expiry date | Jul 17, 2005 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T137/7834
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
A paint discharge control device includes a housing having a paint supply port and a paint discharge port defined therein, a paint passage through which the paint supply and discharge ports communicate with each other, a diaphragm disposed in the paint passage and actuatable by air under pressure for controlling the rate of a paint flow through said paint passage, a piston slidably disposed in the housing and having a hole defined therein as part of the paint passage, and a needle valve supported in the housing and having a portion disposed in the hole in the piston. The paint passage includes a paint discharge control passageway defined between the hole and the needle valve portion. The cross-sectional area of the paint discharge control passageway can be varied in response to sliding movement of the piston in the housing.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.