Disposable cassette for fluid delivery pump systems
US4850807A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jun 16, 1987 |
| Grant date | Jul 25, 1989 |
| Priority date | — |
| Expiry date | Jun 16, 2007 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61M2205/128
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A readily sterilizable, disposable cassette (3) can be used in a medical pumping system having a supply tube (2), an outlet tube (6) and means (22,24), such as a motor-driven piston, for intermittently applying pressure to the cassette. The cassette features a hydraulically self-actuating inlet valve (44) communicating with the supply tube (2), a hydraulically self-actuating outlet check valve (42) communicating with, and preventing backflow from, the outlet tube (6), a hollow, resilient compressible member, such as a bellows (34), having an interior communicating with the inlet and outlet valves, and a support structure (30,36,38) securing together the tubes, valves and bellows in operating relation. Preferably, the inlet and outlet valves are a unitary element. An optical sensing system detects fluid exhaustion in the cassette. The cassette has an irregularly-shaped cap (38) which prevents incorrect insertion into a pump.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.