Rechargeable sprayer with improved valve system and charge cycle limit stop therefor
US3940029A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Dec 13, 1973 |
| Grant date | Feb 24, 1976 |
| Priority date | — |
| Expiry date | Dec 13, 1993 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB05B9/0883
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A manually operated, hand-held, rechargeable, liquid spraying device having a non-pressurized, refillable or non-refillable container, is disclosed. The sprayer, a completely contained device, comprises a charging mechanism whereby, upon rotation of one part relative to another part, a movable piston is displaced vacating a charge chamber which, simultaneously, is charged with liquid. Displacement of the piston compresses a responsor or spring which, in turn, causes the piston to exert a hydraulic pressure on the liquid now in the chamber vacated by the piston. Hydraulic pressure on the charge chamber liquid is maintained by the closing of a one-way, elastomeric resilient valve in the entrance in the chamber, which closing occurs when the piston halts in its movement. A push botton flow control valve, when operated, permits liquid to flow from the charge chamber to an outlet nozzle through associated conduit means, being urged therethrough by the piston which is moved back into the charge chamber under the urging of the responsor or spring.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.