Manually operated spray pump
US4057176A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | May 5, 1976 |
| Grant date | Nov 8, 1977 |
| Priority date | — |
| Expiry date | May 5, 1996 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB05B11/0039
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A reciprocating type of finger pump for use on top of a product container. This combines a tubular housing, including a laterally directed spray nozzle, mounted coaxially in the sleeve of an accumulator cap including a central valve. The valve opening leads to a dip tube which passes into a liquid reservoir in the container. The tubular housing, including the spray nozzle, is depressed manually so that it moves telescopically in the accumulator sleeve, driving a hollow piston against the tension of a spring. The first compression stroke serves to prime the pump, forcing a piston to close the valve to the dip tube. Simultaneously, air in an annular chamber of the housing surrounding the hollow piston is compressed. On the reverse or suction stroke, the valve to the dip tube is opened, creating a vacuum which causes the liquid to be sucked up from the reservoir and into the hollow piston. On the second or subsequent compression strokes, the compressed air and liquid are forced through normally closed pressure responsive seals into the inner mixing chamber, where the compressed air breaks up and atomizes the liquid, causing the atomized spray to move at high pressure through the spray…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.