Patent US1792608A successfully refreshed from Google Patents.
Patent US3841551A successfully refreshed from Google Patents.
US3841551A
Expired / Lapsed
US
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Thermo-operation type transfer valve
Assignee: Denso Corp
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Filing: 1972-09-15
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Granted: 1974-10-15
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Expires: 1992-09-15
Abstract
Abstract A transfer valve operative in response to variation in temperature at two predetermined setting points includes a valve member slidable in a valve passage which is provided with an output passage and two input passages. The valve member is divided into two sections coupled to each other with an intermediate rod member. One of the valve sections is provided by a through hole extending axially and one of the input passages is provided with a branch passage opened to a different position from that of the input passage from which it branches off. The valve passage is provided at one end thereof with an thermal expansible wax chamber bounded with a diaphragm. The valve member is slided axially in the valve passage by the force of expansion of the wax in one direction and by a force of a compression spring in the opposite direction.
Inventors
- 👤 N Ota
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 02:12
CPC Classifications
G; G05; G05D; G05D23/00; G05D23/185; Y; Y10; Y10T; Y10T137/00; Y10T137/8593; Y10T137/86493; Y10T137/86501; Y10T137/86815
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
331 words
A thermo-operation type transfer valve comprising a casing defining therein a valve passage extending axially of said casing, a cover means closing an end of said casing and adapted to be disposed in heat conductive relationship to a material the temperature of which is to be detected, a single diaphragm disposed axially inwardly of said cover means and extending generally transversely of the axis of said casing for defining with said cover means a single, closed, variable volume chamber, a thermally expansive element which expands as the temperature of the material to be detected rises, said thermally expansive element being contained in said single chamber and including two kinds of waxes having different melting points, a valve member disposed in said valve passage for axial movement by the thermal expansion of said thermally expansive element, said valve passage being provided with a fluid outlet passage and two fluid inlet passages, said outlet passage and said inlet passages each being formed in the peripheral wall of said casing and each being spaced axially from one another, said valve member being provided with a through-hole extending from one end thereof to a portion of the periphery of said valve member between the ends thereof, one of said inlet passages being provided with a branch passage connected thereto which opens into said valve passage at a location axially spaced from the location where the inlet passage having said branch passage is opened to said valve passage, said location being spaced from said outlet passage by at least the length of said through-hole, wherein said outlet passage is communicated with only one of said inlet passages at a temperature lower than a predetermined lower temperature, said outlet passage is communicated with only the other of said inlet passages at a temperature higher than said predetermined lower temperature and lower than a predetermined higher temperature and said outlet passage is communicated with only said one inlet passage at a temperature higher than said predetermined higher temperature.
Claim 2
Dependent Claim
331 words
A thermo-operation type transfer valve comprising a casing defining therein a valve passage extending axially of said casing, a cover means closing an end of said casing and adapted to be disposed in heat conductive relationship to a material the temperature of which is to be detected, a single diaphragm disposed axially inwardly of said cover means and extending generally transversely of the axis of said casing for defining with said cover means a single, closed, variable volume chamber, a thermally expansive element which expands as the temperature of the material to be detected rises, said thermally expansive element being contained in said single chamber and including two kinds of waxes having different melting points, a valve member disposed in said valve passage for axial movement by the thermal expansion of said thermally expansive element, said valve passage being provided with a fluid outlet passage and two fluid inlet passages, said outlet passage and said inlet passages each being formed in the peripheral wall of said casing and each being spaced axially from one another, said valve member being provided with a through-hole extending from one end thereof to a portion of the periphery of said valve member between the ends thereof, one of said inlet passages being provided with a branch passage connected thereto which opens into said valve passage at a location axially spaced from the location where the inlet passage having said branch passage is opened to said valve passage, said location being spaced from said outlet passage by at least the length of said through-hole, wherein said outlet passage is communicated with only one of said inlet passages at a temperature lower than a predetermined lower temperature, said outlet passage is communicated with only the other of said inlet passages at a temperature higher than said predetermined lower temperature and lower than a predetermined higher temperature and said outlet passage is communicated with only said one inlet passage at a temperature higher than said predetermined higher temperature.
Claim 3
Dependent Claim
55 words
A thermo-operation type transfer valve according to claim 1, in which said cover means includes a generally cup-shaped member, an elongated member axially movably extending between said diaphragm and an end of said valve member, and a compression spring extending between the other end of said valve member and the other end of said casing.
Claim 4
Dependent Claim
53 words
A thermo-operation type transfer valve according to claim 1, in which said casing is provided with a fitting member having a threaded outer peripheral surface portion for cooperation with a threaded hole in a container to secure said casing thereto, said container containing the material of which the temperature is to be detected.
Claim 5
Dependent Claim
58 words
A thermo-operation type transfer valve according to claim 3, in which said fitting member supports a hollow cylindrical member disposed concentrically therein, said cylindrical member movably supporting an elongated member disposed therein and extending between an end of said valve member and said diaphragm to transmit the thermal expansion of said thermally expansive element to said valve member.
Claim 6
Dependent Claim
52 words
A thermo-operation type transfer valve according to claim 1, in which said valve member has end portions and an intermediate portion of a reduced diameter, said end portions being in sliding and sealing engagement with the inner peripheral surface of said valve passage, said through-hole extending through one of said end portions.
Claim 7
Dependent Claim
77 words
A thermo-operation type transfer valve according to claim 1, in which said outlet passage is adapted to be connected to the input terminal of a vacuum-operated advancer of an internal combustion engine, said one inlet passage is adapted to be connected to an intake system of said engine, the other said inlet passage is adapted to be opened to atmosphere, and the said thermally expansive element is adapted to detect the temperature of coolant for said engine.
Claim 8
Dependent Claim
326 words
A thermo-operation type transfer valve comprising a casing defining therein a valve passage extending axially of said casing, a cover means closing an end of said casing and adapted to be disposed in heat conductive relationship to a material the temperature of which is to be detected, a single diaphragm disposed axially inwardly of said cover means and extending generally transversely of the axis of said casing for defining with said cover means a single, closed, variable volume chamber, a thermally expansive element which expands as the temperature of the material to be detected rises, said thermally expansive element being contained in said single chamber and including two kinds of waxes having different melting points, a valve member disposed in said valve passage for axial movement in accordance with the thermal expansion of said thermally expansive element, said valve passage being provided with a fluid outlet passage and two fluid inlet passages, said outlet passage and said inlet passages each being formed in the peripheral wall of said casing and each being spaced axially from one another, said valve member being provided with a through-hole extending from one end thereof to a portion of the periphery of said valve member between the respective ends of said valve member, one of said inlet passages being provided with a branch passage opened to said valve passage at a location axially spaced from the location where the inlet passage having said branch passage is opened to said valve passage, means for communicating said outlet passage with a first inlet passage at a temperature lower than a predetermined lower temperature, means including said through-hole for communicating said outlet passage with the other of said inlet passages at a temperature higher than said predetermined lower temperature and lower than a predetermined higher temperature, and means including said through-hole and said branch passage for communicating said outlet passage with said first inlet passage at a temperature higher than said determined higher temperature.
Claim 9
Dependent Claim
326 words
A thermo-operation type transfer valve comprising a casing defining therein a valve passage extending axially of said casing, a cover means closing an end of said casing and adapted to be disposed in heat conductive relationship to a material the temperature of which is to be detected, a single diaphragm disposed axially inwardly of said cover means and extending generally transversely of the axis of said casing for defining with said cover means a single, closed, variable volume chamber, a thermally expansive element which expands as the temperature of the material to be detected rises, said thermally expansive element being contained in said single chamber and including two kinds of waxes having different melting points, a valve member disposed in said valve passage for axial movement in accordance with the thermal expansion of said thermally expansive element, said valve passage being provided with a fluid outlet passage and two fluid inlet passages, said outlet passage and said inlet passages each being formed in the peripheral wall of said casing and each being spaced axially from one another, said valve member being provided with a through-hole extending from one end thereof to a portion of the periphery of said valve member between the respective ends of said valve member, one of said inlet passages being provided with a branch passage opened to said valve passage at a location axially spaced from the location where the inlet passage having said branch passage is opened to said valve passage, means for communicating said outlet passage with a first inlet passage at a temperature lower than a predetermined lower temperature, means including said through-hole for communicating said outlet passage with the other of said inlet passages at a temperature higher than said predetermined lower temperature and lower than a predetermined higher temperature, and means including said through-hole and said branch passage for communicating said outlet passage with said first inlet passage at a temperature higher than said determined higher temperature.
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) | 1977-10-14 | 1978-04-15 | 1978-10-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-10-14 | 1982-04-15 | 1982-10-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-10-14 | 1986-04-15 | 1986-10-15 | $7700.00 | Window Closed / Lapsed |