Robert D Pound

US Patent:

52307271, Jul 27, 1993

Filed:

Jun 5, 1992

Appl. No.:

7/894447

Inventors:

Robert D. Pound - Erie CO
Lockett E. Wood - Louisville CO

Assignee:

Cybermedic, Inc. - Boulder CO

International Classification:

B01D 4610

US Classification:

55492

Abstract:

An inexpensive, bi-directional, low flow resistance air filter for medical ventilation equipment and the like includes a disposable shell possessing a cylindrical conduit terminating in an exponentially curved radially outwardly flaring surface. The exponentially curved construction minimizes dead space and hence also flow resistance Radially and axially spaced stepped annular surfaces connected by short axially extending cylindrical sidewall portions at a distal end of the shell function as coupling and sealing surfaces. A ring of adhesive applied adjacent a peripheral edge of an electret filter disk mounts the filter disk internally within the shell. An elastic retaining band detachably secures an equipment connection adapter to the shell, such that a technician may easily and quickly replace the shell and filter. The equipment connection adapter possesses clamping ring and coupling rim surfaces dimensioned in close conformance with the coupling and sealing surfaces of the shell to ensure a fluid tight connection. The filter assembly allows rapid replacement of contaminated filter components to protect patients from diseases caused by bacterial and viral microorganisms, while minimizing medical waste.