Manually actuated trigger sprayer
US4345718A · kind A · utility
Inventor
Key dates
| Filing date | Dec 26, 1979 |
| Grant date | Aug 24, 1982 |
| Priority date | — |
| Expiry date | Dec 26, 1999 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB05B11/0039
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
Sprayer for fluid product in which a hand-actuated trigger forces a hollow piston mounted to move in vertical reciprocating fashion in a stationary tubular accumulator, against the compression of a spring. The product is forced upward and out through a swirl chamber adjacent the spray nozzle. Additional product is siphoned up into the accumulator by the partial vacuum created by the return of the piston to its rest position. Alternative embodiments, including both a vertically and horizontally directed sprayer, feature an annular flexible flange seating against an annular skirt below a swirl chamber, which keeps air out of the product chamber and deflects inwardly to release product under pressure. Additionally, a horizontally-directed spray-head may be attached to the vertical trigger sprayer for the purpose of converting the latter to a horizontal sprayer. Further embodiments comprise modification of the annular flexible flange including separate flange-type components which may be force-fitted into the accumulator top, and are constructed to tangentially seal against the annular skirt and deflect to release product. A dome and stopper structure may be used to replace the annular…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.