US3833171A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Temperature responsive valve assembly
Assignee: Vernay Laboratories Inc
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Filing: 1973-07-18
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Granted: 1974-09-03
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Expires: 1993-07-18
Abstract
Abstract A fluid flow metering valve which functions to decrease the effective area of a flow port in response to temperature decreases until a preselected temperature is reached, at which point further decreases in temperature have no appreciable effect on the effective size of the flow port area. The valve includes a valve casing constructed of a material having a relatively high coefficient of linear thermal expansion and a valve core slidably received in the casing and constructed of a material having a relatively low coefficient of linear thermal expansion. The valve core is provided with an enlarged head at one end and a shoulder adjacent its opposite end, both of which are adapted to engage abutments or stops formed in the bore in the casing receiving the core, and a coil spring urges these portions of the core and casing into engagement with each other.
Inventors
- 👤 R Gifford
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 01:50
CPC Classifications
G; G05; G05D; G05D23/00; G05D23/01; G05D23/02; G05D23/024; Y; Y10; Y10S; Y10S261/00; Y10S261/38
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
125 words
A thermally responsive valve comprising: a. a valve casing having a relatively high coefficient of linear thermal expansion, b. means defining a bore extending longitudinally of said casing, c. a valve core having a relatively low coefficient of linear thermal expansion compared to said casing slidably received in said bore, d. abutment means positioned in said bore adjacent one end thereof, e. abutment engaging means on said valve core positioned in opposition to said abutment means for engagement therewith upon expansion of said core, f. stop means positioned adjacent an opposite end of said bore, g. stop engaging means on said valve core positioned in opposition to said stop means, and h. means for urging said stop engaging means into engagement with said stop means.
Claim 2
Dependent Claim
125 words
A thermally responsive valve comprising: a. a valve casing having a relatively high coefficient of linear thermal expansion, b. means defining a bore extending longitudinally of said casing, c. a valve core having a relatively low coefficient of linear thermal expansion compared to said casing slidably received in said bore, d. abutment means positioned in said bore adjacent one end thereof, e. abutment engaging means on said valve core positioned in opposition to said abutment means for engagement therewith upon expansion of said core, f. stop means positioned adjacent an opposite end of said bore, g. stop engaging means on said valve core positioned in opposition to said stop means, and h. means for urging said stop engaging means into engagement with said stop means.
Claim 3
Dependent Claim
22 words
The valve of claim 1 wherein: a. said stop means comprises an enlarged portion of said bore defining an outwardly projecting shoulder.
Claim 4
Dependent Claim
43 words
The valve of claim 2 wherein: a. said means for urging said stop engaging means into contact with said stop means comprises a spring member mounted in said enlarged portion of said bore and pushing said stop engaging means toward said stop means.
Claim 5
Dependent Claim
48 words
The valve of claim 3 further comprising: a. a retainer extending inwardly of said enlarged portion of said bore in spaced relation to said stop means and in engagement with said spring member, and b. means defining a pocket formed in said core and receiving said spring member.
Claim 6
Dependent Claim
30 words
The valve of claim 1 wherein: a. said stop engaging means comprises an outwardly projecting head formed on one end of said core in overlying relationship to said stop means.
Claim 7
Dependent Claim
54 words
The valve of claim 5 wherein: a. said means urging said head into engagement with said stop means comprises a spring member, and b. a retainer is mounted in said bore in engagement with said spring member and in spaced relationship to said stop means to retain said spring in contact with said core.
Claim 8
Dependent Claim
23 words
The valve of claim 6 further comprising: a. means defining a pocket in said one end of said core receiving said spring member.
Claim 9
Dependent Claim
161 words
A thermally responsive valve comprising: a. a valve casing having a longitudinally extending bore, b. means defining an abutment adjacent one end of said bore and a stop adjacent an opposite end of said bore, c. a valve core slidably received in said bore and having portions adapted to engage said abutment and stop defining means, d. the length and coefficient of linear thermal expansion of said core with respect to the length of said bore and the coefficient of linear thermal expansion of said casing being such that: i. said abutment and stop engaging means engage said abutment and stop, respectively, at a first temperature, ii. said abutment engaging means is spaced from said abutment and said stop engaging means engages said stop at a second temperature higher than said first temperature, and iii. said abutment engaging means engages said abutment and said stop engaging means is spaced from said stop at a third temperature lower than said first temperature.
Claim 10
Dependent Claim
161 words
A thermally responsive valve comprising: a. a valve casing having a longitudinally extending bore, b. means defining an abutment adjacent one end of said bore and a stop adjacent an opposite end of said bore, c. a valve core slidably received in said bore and having portions adapted to engage said abutment and stop defining means, d. the length and coefficient of linear thermal expansion of said core with respect to the length of said bore and the coefficient of linear thermal expansion of said casing being such that: i. said abutment and stop engaging means engage said abutment and stop, respectively, at a first temperature, ii. said abutment engaging means is spaced from said abutment and said stop engaging means engages said stop at a second temperature higher than said first temperature, and iii. said abutment engaging means engages said abutment and said stop engaging means is spaced from said stop at a third temperature lower than said first temperature.
Claim 11
Dependent Claim
72 words
The valve of claim 8 further comprising: a. means defining a flow port, and b. means fixing said valve casing with respect to said flow port with a portion of said valve core positioned in said port, c. said valve core being operative to vary the effective open area of said flow port over a first temperature range and relatively inoperative to vary said effective open area over a second temperature range.
Claim 12
Dependent Claim
146 words
The valve of claim 8 further comprising: a. a portion of said bore adjacent one end thereof being of reduced cross section, forming an inwardly projecting shoulder defining said abutment, b. a second portion of said bore adjacent an opposite end thereof being of enlarged cross section, forming an outwardly projecting shoUlder defining said stop, c. a portion of said core adjacent said one end of said bore defining an outwardly projecting shoulder disposed in opposition to and for engagement with said inwardly projecting shoulder of said bore upon expansion of said core, d. a portion of said core adjacent said opposite end of said bore being of enlarged cross section and defining a head positioned for engagement with said outwardly projecting shoulder of said bore upon contraction of said core, and e. spring means resiliently urging said head into engagement with said outwardly projecting shoulder.
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) | 1977-09-02 | 1978-03-04 | 1978-09-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-09-02 | 1982-03-04 | 1982-09-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-09-02 | 1986-03-04 | 1986-09-03 | $7700.00 | Window Closed / Lapsed |