Accumulator release pump
US4022354A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Feb 17, 1976 |
| Grant date | May 10, 1977 |
| Priority date | — |
| Expiry date | Feb 17, 1996 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB05B11/1001
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A finger operated accumulator release pump, adapted to be mounted on a container to dispense liquid therefrom only after the liquid has been pressurized by a predetermined amount, comprises a housing which defines a pump chamber and an inlet to the pump chamber. A conventional check valve prevents return flow of liquid through this inlet. A plunger is telescopically received for reciprocal pumping action in the pump chamber, makes a sliding piston fit with it, and is provided with an outlet passage and a valve seat at the inlet end of the outlet passage. The pressure accumulating release feature of the pump is provided by cooperation of an outlet passage by-pass arrangement and a pressure actuated accumulator valve. The by-pass arrangement comprises a number of by-pass grooves which are disposed in a generally axial direction on the inner surface of the outlet passage at a location intermediate its ends. The accumulator valve member is mounted for reciprocal movement in the outlet passage between a closed position sealed against the inner wall of the outlet passage or against the valve seat and an open position adjacent the by-pass grooves where it permits liquid to be forced throu…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.