Movable cleaning assembly for an aspirating needle
US4820497A · kind A · utility
27Cited by
37References
29Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jun 23, 1986 |
| Grant date | Apr 11, 1989 |
| Priority date | — |
| Expiry date | Jun 23, 2006 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T436/114998
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A liquid dispensing apparatus is characterized by a cleaning arrangement movable with the aspirating needle of the apparatus. The cleaning arrangement includes a pair of mating wellheads one of which has a flange with a planar surface thereon. The other of the wellheads has a corresponding cutout therein. When registered, the wellheads cooperate to define a well-like chamber with a closed bottom. The wellheads are each mounted on an arm which is movable from open to closed dispositions in response to movement of the aspirating needle.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.