Steve Niem Vuong

US Patent:

20090241953, Oct 1, 2009

Filed:

Mar 30, 2009

Appl. No.:

12/414430

Inventors:

Joseph Douglas Vandine - Newark CA, US
Steve Vuong - Vista CA, US
Iqbal Shahid - Mountain View CA, US
Ravikumar V. Kudaravalli - Manassas VA, US

Assignee:

Nellcor Puritan Bennett LLC - Boulder CO

International Classification:

A61M 16/12

US Classification:

12820421, 12820518, 12820511

Abstract:

A mechanical ventilator is provided with a piston-cylinder for performing an air displacement function and a buffer volume and associated output valve for providing an air metering function. The piston-cylinder may comprise a reciprocating arrangement, in which compressed air is supplied to the buffer volume with each stroke of the piston.