Low pressure dispensing apparatus with air pump
US3955720A · kind A · utility
Inventor
Key dates
| Filing date | Oct 25, 1973 |
| Grant date | May 11, 1976 |
| Priority date | — |
| Expiry date | Oct 25, 1993 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB05B7/2427
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A reuseable dispensing apparatus for dispensing a flowable product by pressurized air, comprising a refillable container for the product to be dispensed and an air pump operable by the user to pressurize the container after filling. The air pump has a conveniently grippable and storable handle. A user-actuable dispensing valve on the container dispenses product utilizing pressurized air as a propellant. Apparatuses are provided to permit the container to be depressurized at any time without product being dispensed, to relieve pressure in the pumping chamber either automatically at operating pressure or manually at any lesser pressure, and to permit the pumping handle to be conveniently stored with respect to the container. The apparatus can operate at relatively low pressure and can be made almost entirely of plastic.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.