US3665767A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fluidic pressure indicator
Assignee: United States Department of the Navy
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Filing: 1971-01-27
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Granted: 1972-05-30
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Expires: 1991-01-27
Abstract
Abstract To form a fluidic pressure gauge a pair of back pressure sensor nozzles are mounted in gapped adjacency to the movable ends of respective bellows or diaphragms. One bellows is connected, for example, to communicate with the engine oil pressure while the other communicates with a suitable reference pressure. The output leg of each nozzle is connected to a differential pressure gauge. Another form of the invention yields a nonanalog indication when the oil pressure is outside a certain range. The ends of the bellows are connected together by a pivoting arm which operates a linearly movable slotted bar. An interruptable jet is mounted adjacent the slotted bar and connected to a fluidic logic gate whose outputs operate pneumatic indicators.
Inventors
- 👤 Horace B Welk Jr
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 20:11
CPC Classifications
G; G01; G01L; G01L19/00; G01L19/08; Y; Y10; Y10S; Y10S73/00; Y10S73/08; Y10T; Y10T137/00; Y10T137/206; Y10T137/212; Y10T137/2125; Y10T137/2142
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
73 words
A differential pressure indicating system, comprising: a pair of pressure responsive means adapted to receive respective input pressures for converting changes therein to linear motion; a pair of nozzles operatively mounted adjacent said pressure responsive means respectively, each nozzle having a fluid supply inlet and a back pressure outlet providing a fluid output; and differential pressure gauge means connected to both nozzle outlets for indicating the back pressure difference between said nozzle outputs.
Claim 2
Dependent Claim
73 words
A differential pressure indicating system, comprising: a pair of pressure responsive means adapted to receive respective input pressures for converting changes therein to linear motion; a pair of nozzles operatively mounted adjacent said pressure responsive means respectively, each nozzle having a fluid supply inlet and a back pressure outlet providing a fluid output; and differential pressure gauge means connected to both nozzle outlets for indicating the back pressure difference between said nozzle outputs.
Claim 3
Dependent Claim
46 words
An indicating system according to claim 1 further comprising: each said pressure responsive means including a bellows, said nozzles operatively mounted at one end of said bellows respectively, such that movement of each said one end under pressure variation causes partial restriction of the corresponding nozzle.
Claim 4
Dependent Claim
96 words
A binary pressure gauge system for indicating whether the difference between two input pressures is within a predetermined range, comprising: differential pressure sensing means adapted to receive the input pressures for converting the pressure difference therebetween to proportional linear motion; interruptable jet means having a fluid supply inlet and an outlet providing a binary fluid output; baffle means connected to said sensing means for interrupting said jet means when said pressure difference is outside of the predetermined range; and logic means connected to said jet means outlet for indicating the level of said jet means output.
Claim 5
Dependent Claim
96 words
A binary pressure gauge system for indicating whether the difference between two input pressures is within a predetermined range, comprising: differential pressure sensing means adapted to receive the input pressures for converting the pressure difference therebetween to proportional linear motion; interruptable jet means having a fluid supply inlet and an outlet providing a binary fluid output; baffle means connected to said sensing means for interrupting said jet means when said pressure difference is outside of the predetermined range; and logic means connected to said jet means outlet for indicating the level of said jet means output.
Claim 6
Dependent Claim
45 words
A pressuRe gauge system according to claim 3 further comprising: said logic means including gate means operatively receiving said jet means output for providing two outputs indicative respectively of the binary levels thereof; and pneumatic indicator means operatively connected to receive said gate means outputs.
Claim 7
Dependent Claim
54 words
A pressure gauge system according to claim 4 further comprising: said gate means including a fluidic OR/NOR logic gate having a fluid supply inlet and a control inlet connected to receive said jet means output; and said pneumatic indicator means including a pair of color-coded pneumatic indicators connected respectively to said gate means outputs.
Claim 8
Dependent Claim
46 words
A pressure gauge system according to claim 3 further comprising: said baffle means including a linearly movable member having a slot corresponding to the predetermined range; and said jet means including means for defining a fluid path having a gap, said member passing through said gap.
Claim 9
Dependent Claim
34 words
A pressure gauge system according to claim 6 further comprising: said jet means including a body housing said fluid path and having a notch forming said gap, said baffle member passing through said notch.
Claim 10
Dependent Claim
69 words
A pressure gauge system according to claim 7 further comprising: said sensing means including a pair of bellows aligned for parallel elongation and adapted to be connected respectively to receive the input pressures, a yoke rotatable about an intermediate point and connected respectively at both ends to said bellows, said baffle member being operatively connected to one end of said yoke for linear motion proportional to said pressure difference.
References Cited (Backward Citations)
US3153934A
Cited
US3228602A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-05-30 | 1975-11-29 | 1976-05-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-05-30 | 1979-11-29 | 1980-05-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-05-30 | 1983-11-29 | 1984-05-30 | $7700.00 | Window Closed / Lapsed |