Fluid pressure monitoring and flow control apparatus
US4947856A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Oct 26, 1988 |
| Grant date | Aug 14, 1990 |
| Priority date | — |
| Expiry date | Oct 26, 2008 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61B5/0215
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
Apparatus for monitoring fluid pressure and controlling fluid flow in a fluid line. The apparatus (10) includes a base (36) and a cover (38), between which is captured a membrane (42). The base includes an inlet port (18), a first outlet port (20), and a second outlet port (34). Channels formed within the base and covered by the membrane connect the inlet and outlet ports in fluid communication. The apparatus includes a flushing flow control valve (30) formed by a flow control projection (70), which projects outwardly from the base through the cover, and separates an inlet channel (62) from an outlet channel (64). A capillary flow passage 88 for restricting flow through the apparatus is disposed between the inlet channel and outlet channel comprises a capillary groove (86), formed across the flow control projection, adjacent the overlying membrane. Flushing fluid flow through the apparatus is obtained by pulling upwardly on a grip (90) to deform the membrane away from the flow control projection, thereby enlarging the capillary flow passage. A pressure sensing assembly (28) is mounted on the apparatus in fluid communication with the outlet channel for continuous monitoring of fluid…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.