US4104584A
Expired / Lapsed
US
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Moisture content meter
Assignee: Panasonic Holdings Corp
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Filing: 1977-02-02
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Granted: 1978-08-01
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Expires: 1997-02-02
Abstract
Abstract A moisture content meter comprising A microwave generator for generating a microwave signal of a constant power level, A microstrip transmission line connected in a manner to receive at one end thereof the microwave signal from said microwave generator and disposed in a manner that a flowing sample object, for instance cereal, contacts substantially the surface thereof and A microwave detector connected in a manner to detect the remaining power level after absorption by the flowing sample object of the microwave signal taken from the other end of said microstrip transmission line.
Inventors
- 👤 Yukio Miyai
- 👤 Takeshi Kojo
- 👤 Junichi Takahashi
- 👤 Satoshi Yoshioka
- 👤 Kensuke Nakamichi
- 👤 Kozo Okada
- 👤 Setsuko Takeda
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 14:34
CPC Classifications
G; G01; G01R; G01R27/00; G01R27/02; G01R27/04; G01N; G01N22/00; G01N22/04
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
106 words
A moisture content meter comprising a microwave generator for generating a microwave signal of a constant power level, a microstrip transmission line connected in a manner to receive at one end thereof the microwave signal from said microwave generator and disposed on one side of a sample body to be measured so as to substantially contact the surface thereof and a microwave detector connected in a manner to detect the power level of the microwave signal taken out from the other end of said microstrip transmission line, the difference in power lines at the opposite ends of the microstrip reflecting the moisture content of the body.
Claim 2
Dependent Claim
106 words
A moisture content meter comprising a microwave generator for generating a microwave signal of a constant power level, a microstrip transmission line connected in a manner to receive at one end thereof the microwave signal from said microwave generator and disposed on one side of a sample body to be measured so as to substantially contact the surface thereof and a microwave detector connected in a manner to detect the power level of the microwave signal taken out from the other end of said microstrip transmission line, the difference in power lines at the opposite ends of the microstrip reflecting the moisture content of the body.
Claim 3
Dependent Claim
38 words
A moisture content meter of claim 1, wherein said microstrip transmission line has a loop-shaped pattern having a developed length sufficiently longer than the distance between said one end and said other end of said microstrip transmission line.
Claim 4
Dependent Claim
22 words
A moisture content meter of claim 1 wherein the surface of said microstrip transmission line has a protection film of insulating substance.
Claim 5
Dependent Claim
26 words
A moisture measuring apparatus of claim 1 which further comprises microwave integrated circuits for controlling the oscillation power level of the microwave signal to be constant.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1981-07-31 | 1982-01-30 | 1982-08-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-07-31 | 1986-01-30 | 1986-08-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-07-31 | 1990-01-30 | 1990-08-01 | $7700.00 | Window Closed / Lapsed |