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FR2653911B1 - HYGROSTATIC CONTROL DEVICE. - Google Patents

HYGROSTATIC CONTROL DEVICE.

Info

Publication number
FR2653911B1
FR2653911B1 FR8914622A FR8914622A FR2653911B1 FR 2653911 B1 FR2653911 B1 FR 2653911B1 FR 8914622 A FR8914622 A FR 8914622A FR 8914622 A FR8914622 A FR 8914622A FR 2653911 B1 FR2653911 B1 FR 2653911B1
Authority
FR
France
Prior art keywords
control device
hygrostatic
hygrostatic control
control
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
FR8914622A
Other languages
French (fr)
Other versions
FR2653911A1 (en
Inventor
Gervais Christian
Chevallier Jacques
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Individual filed Critical Individual
Priority to FR8914622A priority Critical patent/FR2653911B1/en
Priority to PCT/FR1990/000786 priority patent/WO1991006902A1/en
Publication of FR2653911A1 publication Critical patent/FR2653911A1/en
Application granted granted Critical
Publication of FR2653911B1 publication Critical patent/FR2653911B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • A—HUMAN NECESSITIES
    • A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01G—HORTICULTURE; CULTIVATION OF VEGETABLES, FLOWERS, RICE, FRUIT, VINES, HOPS OR SEAWEED; FORESTRY; WATERING
    • A01G25/00—Watering gardens, fields, sports grounds or the like
    • A01G25/16—Control of watering
    • A01G25/167—Control by humidity of the soil itself or of devices simulating soil or of the atmosphere; Soil humidity sensors
    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
    • G05D22/00—Control of humidity

Landscapes

  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Automation & Control Theory (AREA)
  • Soil Sciences (AREA)
  • Water Supply & Treatment (AREA)
  • Environmental Sciences (AREA)
  • Nozzles (AREA)
  • Catching Or Destruction (AREA)
FR8914622A 1989-10-31 1989-10-31 HYGROSTATIC CONTROL DEVICE. Expired - Lifetime FR2653911B1 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
FR8914622A FR2653911B1 (en) 1989-10-31 1989-10-31 HYGROSTATIC CONTROL DEVICE.
PCT/FR1990/000786 WO1991006902A1 (en) 1989-10-31 1990-10-31 Hygrostatic control device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR8914622A FR2653911B1 (en) 1989-10-31 1989-10-31 HYGROSTATIC CONTROL DEVICE.

Publications (2)

Publication Number Publication Date
FR2653911A1 FR2653911A1 (en) 1991-05-03
FR2653911B1 true FR2653911B1 (en) 1992-05-07

Family

ID=9387184

Family Applications (1)

Application Number Title Priority Date Filing Date
FR8914622A Expired - Lifetime FR2653911B1 (en) 1989-10-31 1989-10-31 HYGROSTATIC CONTROL DEVICE.

Country Status (2)

Country Link
FR (1) FR2653911B1 (en)
WO (1) WO1991006902A1 (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IL127953A0 (en) * 1996-07-09 1999-11-30 Clive Lindsay Ragless Soil moisture responder
CN103026949B (en) * 2013-01-17 2014-03-26 中国农业大学 Capillary pressure regulator with stable pressure-regulating performance
CN103026948B (en) * 2013-01-17 2014-03-26 中国农业大学 Capillary pressure regulator

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2318659A1 (en) * 1973-04-13 1974-10-31 Feddern Paul PROCESS AND EQUIPMENT FOR REGULATING THE DEGREE OF MOISTURE OF GRAINY MATERIAL, IN PARTICULAR MOLDING SAND
DE2513600A1 (en) * 1975-03-27 1976-10-07 Rainer Ing Grad Schwemmle Humidity controlled valves for watering systems - with self adjusting valve controlled by sensor whose length varies with humidity
CH607128A5 (en) * 1976-03-25 1978-11-30 Elektrowatt Ag
FR2380588A1 (en) * 1977-02-09 1978-09-08 Levadoux Gilbert Horticultural hydrostatic valve including flexible pipe - has hank of hair and spring acting in opposition to control compression of water pipe
DE3607101A1 (en) * 1986-03-05 1987-09-10 Harald Dipl Ing Vetter Valve for the moisture-dependent regulation of a mass flow

Also Published As

Publication number Publication date
FR2653911A1 (en) 1991-05-03
WO1991006902A1 (en) 1991-05-16

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Legal Events

Date Code Title Description
ST Notification of lapse