Fluid dispensers
US6250505A · kind A · utility
36Cited by
23References
17Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Mar 29, 2000 |
| Grant date | Jun 26, 2001 |
| Priority date | — |
| Expiry date | Mar 29, 2020 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB65D83/7714
- WIPO fieldHandling
- WIPO sectorMechanical engineering
Abstract
A fluid dispenser is provided including (a) a flexible receptacle, having a closed end and an opposed open end, being movable from a collapsed condition to an elongate condition, and having an outer surface defining a helical thread, and (b) a helical spring in threaded engagement with the helical thread to axially compress the receptacle. Fluid introduced into said receptacle moves the receptacle from its collapsed condition to its elongate condition, producing tension in the spring, the tension being effective to move the receptacle from its elongate condition to its collapsed condition to force fluid from the receptacle.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.