Title:
PEAK FLOWMETER
Document Type and Number:
Japanese Patent JP3628052
Kind Code:
B2
Abstract:
PURPOSE: To obtain a peak flowmeter that can be manufactured at a low cost and that has a long life, by providing a means for adjusting the movement of an indicator along the main body and a mass of slug for putting back the indicator in its original position.
CONSTITUTION: A marker 68 can be slid along a tube 48 inside a slot. A spring 80 retains the marker 68 by friction. The marker 68 has an extremely small mass, and when a person exhales breath into an inlet's edge of the peak flowmeter 20, a disk of a piston 52 moves forward against the pull strength of a spring 60, the marker 68 moving in front of the disk of a piston 52. The piston 52 stops when it reaches a point where the force of exhalation and that of the spring 60 are matched, and, simultaneously, the marker 68 also stops. When exhalation is stopped, the piston 52 returns to a resting position determined by the winding of the coil spring 60, while the marker 68 remains in the position it has reached. Cylindrical slug of a certain mass is provided downstream of the marker 68, and by shaking the flowmeter 20, the marker 68 is pushed back to its resting position by the slug.
Inventors:
William Earl Shane
Application Number:
JP28375794A
Publication Date:
March 09, 2005
Filing Date:
November 17, 1994
Export Citation:
Assignee:
Trudel Medical Limited
International Classes:
G01F1/22; A61B5/08; A61B5/087; A61M16/00; (IPC1-7): A61B5/08
Foreign References:
| WO1993006778A1 |
Attorney, Agent or Firm:
Minoru Nakamura
Fumiaki Otsuka
Shishido Kaichi
Toshio Imajo
Nobuo Ogawa
Village shrine Atsuo
Fumiaki Otsuka
Shishido Kaichi
Toshio Imajo
Nobuo Ogawa
Village shrine Atsuo