Valves and valve actuation – With selective flow regulation – Rotary
Reexamination Certificate
2005-07-12
2005-07-12
Look, Edward K. (Department: 3751)
Valves and valve actuation
With selective flow regulation
Rotary
C251S286000, C137S556600
Reexamination Certificate
active
06916010
ABSTRACT:
The medical regulating valve for adjusting the flow in an infusion or transfusion procedure has a housing (2), and a valve chamber (21) into which an inlet connecting piece and an outlet connecting piece (22, 23) open. A rotating piece has a cylindrical valve plug (41) which can be inserted in the valve chamber (21) to form a seal between the plug and the chamber. The valve plug, has, on its outer periphery, at least one groove (42, 43) opposite the connecting pieces (22, 23) connecting the connecting pieces with one another in terms of flow and having a cross-section changing in the peripheral direction. An insert (3) having the shape of an annular disc overlaps the valve chamber (21) and has, on its side facing the rotating piece (4), a number of markings (35, 36, 37) lying on concentric circles. Provided on the rotating piece (4) are a number of windows (45, 46, 47) which are offset with respect to each other in the peripheral and radial directions, each being opposite one of the markings (35, 36, 37).
REFERENCES:
patent: 4750707 (1988-06-01), Johncox et al.
patent: 5005604 (1991-04-01), Aslanian
patent: 6726175 (2004-04-01), Saba et al.
patent: 83 12 029 (1983-08-01), None
patent: 35 90 339 (1992-03-01), None
patent: 42 01 416 (1993-07-01), None
patent: 43 40 191 (1995-02-01), None
patent: 2002035123 (2002-02-01), None
Beck Bernd
Weber Jörg
Dougherty, Clements Hofer, & Bernard
Smiths Medical Deutschland GmbH
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