Aerosol dispenser for fluid products comprising a piston pump assembly for generating compressed air
US3933279A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Nov 16, 1973 |
| Grant date | Jan 20, 1976 |
| Priority date | — |
| Expiry date | Nov 16, 1993 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF04B39/08
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
An aerosol dispenser for fluid products is described which has a container for product to be dispensed, a separator piston pump for generating compressed air as a propellant, a spray nozzle for aspirating, and spraying product from the product container, flowpaths, for compressed air from the piston pump, and for product from the product container, to the spray nozzle, valves and associated with the flowpaths and opening the paths dependent on the piston approaching or reaching full compression stroke position in the cylinder of the aforesaid piston pump. An abutment in the piston pump acts, in the aforesaid compression stroke position, on the valve body of the compressed air flow-controlling valve. The product flow control valve has a flexible elastic diaphragm across the compressed air flowpath and separating the latter from the interior of the product container. A product outlet in the wall of the product container outside the flexible elastic diaphragm is part of the flowpath for product to the spray nozzle, and a movable valve member is mounted in the flexible elastic diaphragm, the flexible elastic diaphragm being biassed to hold the movable valve member to close sealingly th…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.