Title:
VACUUM DEGREE MEASURING INSTRUMENT BETWEEN COVERING MATERIAL AND GROUND SURFACE IN ATMOSPHERIC PRESSURE METHOD
Document Type and Number:
Japanese Patent JP3969118
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To provide an instrument for simply and highly precisely measuring the vacuum degree between a ground surface and a covering material at low cost.
SOLUTION: This vacuum degree measuring instrument is provided with a vacuum gauge 17 directly or indirectly connected to a vent hole 23 provided in the surface of the covering material in the atmospheric pressure method.
Inventors:
Nakamura Tadaharu
Hidesada Kinji
Monma Natsuyo
Toru Sasaki
Hidesada Kinji
Monma Natsuyo
Toru Sasaki
Application Number:
JP2002046396A
Publication Date:
September 05, 2007
Filing Date:
February 22, 2002
Export Citation:
Assignee:
Obayashi Corporation
International Classes:
E02D1/08; E02D3/10; (IPC1-7): E02D1/08; E02D3/10
Domestic Patent References:
| JP57051321A | ||||
| JP2000144708A | ||||
| JP9125355A |
Attorney, Agent or Firm:
Isshiki International Patent Service Corporation
Satoshi Suzuki
Satoshi Suzuki