Vacuum gauge

Measuring and testing – Fluid pressure gauge – With pressure and/or temperature compensation

Reexamination Certificate

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Details

C313S230000

Reexamination Certificate

active

10516963

ABSTRACT:
A thermal conductivity type pressure gauge comprises a gauge head (2) being rotatably mountable in a vessel whose environmental pressure is to be measured and an elongate electrical filament (6) mounted in the gauge head, the gauge head (2) having an inlet where through the electrical filament is exposed to the environmental pressure within the vessel and the filament (6) having directional component lengths in two orthogonal axes, one of the orthogonal axes X—X being parallel to the axis of rotation of the gauge head (2).

REFERENCES:
patent: 3199356 (1965-08-01), Andriulis
patent: 3915009 (1975-10-01), Worden et al.
patent: 4307323 (1981-12-01), Bills et al.
patent: 4729241 (1988-03-01), Flosbach et al.
patent: 5602441 (1997-02-01), Ohsako et al.
patent: 10 94 341 (1960-12-01), None
patent: 827 311 (1960-02-01), None
patent: 560011332 (1981-02-01), None
patent: 560044816 (1981-04-01), None
patent: 2000241281 (2000-09-01), None
patent: 0491858 (1975-11-01), None
International Search Report of PCT/GB03/02452; Date of publication of the International Search Report: Jun. 3, 2004.
United Kingdom Search Report of Application No. GB 0213611.7; Date of search: Dec. 10, 2002.
Abstract of JP 2000241281 A, “Hot Cathode Ionization Vacuum Gauge,” Anelva Corp. (Sep. 8, 2000).
Abstract of JP 56011332 A, “Hot Cathode Ionization Vacuum Gauge,” Tokyo Shibaura Electric Co. (Feb. 4, 1981).
Abstract of SU 491858 A, “Thermal Vacuum Meter with Pirani Type Transducer-Can be Operated at Constant Temperature, or Current or Voltage,” Lengd Electrotech (Nov. 15, 1975).
Abstract of JP 56044816 A, “Vacuum Gauge,” Tokyo Shibaura Electric Co. (Apr. 24, 1981).

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