Pump device including multiple function collapsible pump chamber
US5439178A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Feb 28, 1994 |
| Grant date | Aug 8, 1995 |
| Priority date | — |
| Expiry date | Feb 28, 2014 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB05B15/30
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A collapsible pump chamber is provided which includes several functional elements of a pump device. For example, the collapsible pump chamber may be a bellows which includes a functional element of an outlet valve, a functional element of a biasing feature, and a functional element of a spin chamber. Consequently, a functional element of all of the downstream functions are incorporated into the bellows. This can significantly reduce costs due to reduced tooling and assembly, for example. In contrast, there are no upstream components incorporated into the bellows which enables the upstream or inlet end of the bellows to be wide open. This wide open upstream end of the bellows makes molding easier.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.