Title:
REFERENCE VOLUME TUBE
Document Type and Number:
WIPO Patent Application WO/2005/064291
Kind Code:
A1
Abstract:
A reference volume tube (10) which is a bi-directional prover having a prover pipe (12) provided with two detectors (14a, 14b), and tube sections (16a, 16b) provided at the opposite ends. At each positions of the tube sections (16a, 16b) closer to the detector (14a, 14b), waiting means (18a, 18b) consisting of gates (20a, 20b) and hydraulic cylinders (22a, 22b) are provided. When a sphere (24) is positioned at the tube section (16b), a gate (20b) of the waiting means (18b) provided between the sphere (24) and the detector (14b) projects into the tube section (16b). Consequently, the sphere (24) moved from the tube section (16b) toward the detector (14b) is stopped by the waiting means (18b) until the flow velocity of a fluid reaches a specified value and prevented from moving in the direction to the detector (14b), and the sphere (24) waits at that position.
Inventors:
MORIYAMA FUKUO (JP)
Application Number:
PCT/JP2004/010782
Publication Date:
July 14, 2005
Filing Date:
July 22, 2004
Export Citation:
Assignee:
OVAL CORP (JP)
MORIYAMA FUKUO (JP)
MORIYAMA FUKUO (JP)
International Classes:
G01F25/00; (IPC1-7): G01F25/00
Foreign References:
| US3668923A | 1972-06-13 | |||
| US3423988A | 1969-01-28 | |||
| JPS51110558U | 1976-09-07 |
Attorney, Agent or Firm:
Kobayashi, Tamotsu (Sumito Building 1-5, Iwamoto-cho 3-chom, Chiyoda-ku Tokyo 32, JP)
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