Title:
人工呼吸装置に適したポンプとその排気バルブアセンブリ
Document Type and Number:
Japanese Patent JP4456143
Kind Code:
B2
Abstract:
A reciprocating pump particularly useful in ventilator apparatus includes a piston reciprocatable axially within a cylinder and dividing its interior into an inlet chamber and an outlet chamber, a wall fixed within the inlet chamber, and a drive housing fixed to the wall. The drive housing includes a motor, a rotor rotatable by the motor, a nut rotatable within the drive housing, and a screw threadedly coupled at one end to the nut and fixed at its opposite end to the piston. The piston is substantially unrestrained for axial and rotary movement such that forward and reverse rotation of the nut by the motor reciprocates the screw and the piston axially of the cylinder, and also permits the screw and the piston to rotate with respect to the cylinder to thereby even out wear between the piston and cylinder.
Inventors:
Carmel Adahan
Application Number:
JP2007242694A
Publication Date:
April 28, 2010
Filing Date:
September 19, 2007
Export Citation:
Assignee:
Carmel Adahan
International Classes:
A61M16/00; F04B13/00; A61M16/20; F04B39/12
Domestic Patent References:
| JP64034374A |
Attorney, Agent or Firm:
Yoshiyuki Osuga