GB1381558A - Thermal actuator - Google Patents
Thermal actuatorInfo
- Publication number
- GB1381558A GB1381558A GB4397872A GB4397872A GB1381558A GB 1381558 A GB1381558 A GB 1381558A GB 4397872 A GB4397872 A GB 4397872A GB 4397872 A GB4397872 A GB 4397872A GB 1381558 A GB1381558 A GB 1381558A
- Authority
- GB
- United Kingdom
- Prior art keywords
- chamber
- valve
- chambers
- valving
- spring
- 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
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
- F03G—SPRING, WEIGHT, INERTIA OR LIKE MOTORS; MECHANICAL-POWER PRODUCING DEVICES OR MECHANISMS, NOT OTHERWISE PROVIDED FOR OR USING ENERGY SOURCES NOT OTHERWISE PROVIDED FOR
- F03G7/00—Mechanical-power-producing mechanisms, not otherwise provided for or using energy sources not otherwise provided for
- F03G7/06—Mechanical-power-producing mechanisms, not otherwise provided for or using energy sources not otherwise provided for using expansion or contraction of bodies due to heating, cooling, moistening, drying or the like
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Fluid-Driven Valves (AREA)
- Magnetically Actuated Valves (AREA)
- Temperature-Responsive Valves (AREA)
- Actuator (AREA)
Abstract
1381558 Thermal responsive devices DANFOSS AS 22 Sept 1972 [22 Sept 1971] 43978/72 Heading G1D [Also in Division F2] A thermal actuator for a valve 6, 7, has formed therein a working chamber A containing a vaporizable liquid 21 and an equalizing chamber B, the two chambers being in selective communication with one another by way of an aperture-defining seat 14 and the channels formed in a valving- member 15, such channels being defined by the polygonal cross-section of the valving-member and being in communication with transverse passages 16. The stem 5 of main valve-member 6, is connected to an interior housing 11 which depends from a bellows 4 and which houses an electromagnetic coil for actuating valving-member 15. The lowermost portion of housing 11 carries an electric heater coil 17. In the state of the actuator shown, the two chambers A and B are in communication with one another and so there is no net pressure differential across the bellows wall 3, there being, in such circumstances, a net downward force on valve stem 5 due to the action of spring 12. On activating the heater 17 and closing magnetic valve 14, 15, the vaporizable liquid 21 (e.g. a fluorochlorohydrocarbon) becomes heated and the vapour thereby generated eventually produces a force greater than, and opposite to, the force of spring 12, thus opening valve 6. If the latter is then to be closed rapidly, magnetic valve 14, 15 is opened and so the pressure in chambers A and B becomes equalized thereby rendering spring 12 effective in rapidly moving closure member 6 into engagement with seat 7. On condensing in chamber B, the condensed vapour flows back into chamber A via passages 16, possibly assisted by a small pump. A pressure sensor 20 cuts-off the current to heater 17 when the pressure exceeds a predetermined value. Alternatively a limit position switch may be used. In a modification Fig. 2 (not shown) the chambers A, B are separated by a rolling diaphragm (29) supporting a movable wall (33) which is frusto-conical to direct condensed vapour from chamber B back to chamber A. Parts of the electromagnetic valve (35) and parts (23, 24) of the actuator housing may be of moulded plastics material, whereas the top (25) of chamber B is of metal to assist condensation.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19712147292 DE2147292B1 (en) | 1971-09-22 | 1971-09-22 | HEAT MOTOR |
Publications (1)
Publication Number | Publication Date |
---|---|
GB1381558A true GB1381558A (en) | 1975-01-22 |
Family
ID=5820268
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB4397872A Expired GB1381558A (en) | 1971-09-22 | 1972-09-22 | Thermal actuator |
Country Status (8)
Country | Link |
---|---|
US (1) | US3834165A (en) |
JP (1) | JPS5143132B2 (en) |
BE (1) | BE786781A (en) |
DE (1) | DE2147292B1 (en) |
FR (1) | FR2154145A5 (en) |
GB (1) | GB1381558A (en) |
IT (1) | IT964869B (en) |
NL (1) | NL151470B (en) |
Families Citing this family (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2625561B2 (en) * | 1976-06-05 | 1980-02-21 | Behr-Thomson Dehnstoffregler Gmbh, 7014 Kornwestheim | Control circuit for regulating the flow of a liquid or gaseous medium |
JPS5382345U (en) * | 1976-12-09 | 1978-07-07 | ||
US4180982A (en) * | 1977-03-21 | 1980-01-01 | Israel Siegel | Instant return-stroke differential temperature engine |
DE2749252C3 (en) * | 1977-11-03 | 1980-09-11 | Danfoss A/S, Nordborg (Daenemark) | Actuating device for adjusting the closing piece of a valve |
JPH0558877U (en) * | 1992-01-17 | 1993-08-03 | 日本サーモスタット株式会社 | Degenerate thermoelement |
IT1296141B1 (en) * | 1997-11-17 | 1999-06-09 | Eltek Spa | THERMAL TYPE ACTUATION DEVICE. |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1983314A (en) * | 1929-06-14 | 1934-12-04 | Cook Electric Co | Heat motor |
US2578992A (en) * | 1947-10-17 | 1951-12-18 | Bendix Aviat Corp | Electrosteam actuator |
US3132472A (en) * | 1959-09-08 | 1964-05-12 | Crane Co | Thermal actuator |
-
1971
- 1971-09-22 DE DE19712147292 patent/DE2147292B1/en active Granted
-
1972
- 1972-07-26 BE BE786781A patent/BE786781A/en unknown
- 1972-08-02 IT IT69532/72A patent/IT964869B/en active
- 1972-09-07 NL NL727212182A patent/NL151470B/en unknown
- 1972-09-18 US US00290092A patent/US3834165A/en not_active Expired - Lifetime
- 1972-09-20 FR FR7233298A patent/FR2154145A5/fr not_active Expired
- 1972-09-21 JP JP47095019A patent/JPS5143132B2/ja not_active Expired
- 1972-09-22 GB GB4397872A patent/GB1381558A/en not_active Expired
Also Published As
Publication number | Publication date |
---|---|
NL7212182A (en) | 1973-03-26 |
US3834165A (en) | 1974-09-10 |
BE786781A (en) | 1972-11-16 |
FR2154145A5 (en) | 1973-05-04 |
DE2147292B1 (en) | 1973-03-22 |
DE2147292C2 (en) | 1973-10-11 |
JPS4839834A (en) | 1973-06-12 |
DE2147292A1 (en) | 1973-03-22 |
JPS5143132B2 (en) | 1976-11-19 |
IT964869B (en) | 1974-01-31 |
NL151470B (en) | 1976-11-15 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
PS | Patent sealed [section 19, patents act 1949] | ||
PLNP | Patent lapsed through nonpayment of renewal fees |