Plural valve, hand-held spray apparatus
US4159081A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jul 18, 1977 |
| Grant date | Jun 26, 1979 |
| Priority date | — |
| Expiry date | Jul 18, 1997 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB05B7/2424
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
Dispensing apparatus has a body defining therein a tubular chamber with an outer wall of generally circular cross-section. A generally coaxial discharge orifice at an end of this chamber is closed by a first valve that includes a member of generally circular cross-section. That member also forms an inner chamber wall and defines with the outer chamber wall an annular discharge passage that is convergent towards the discharge orifice. An annular outlet is in one of the chamber walls and first passage is arranged to supply liquid to be dispensed to the annular outlet for discharge into the discharge passage. Second passage is provided for directing gas under pressure into the chamber for flow through the discharge passage, past the annular outlet and out the orifice. A second valve in the body seals the second passage from the chamber, and an operator mechanism is provided for operating the first and second valves concurrently to open the discharge orifice and to allow gas under pressure to flow through the annular outlet through the discharge orifice and form a spray of generally conical pattern.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.