Patent US3563138A successfully refreshed from Google Patents.
US3563138A
Expired / Lapsed
US
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Differential pressure responsive device with diaphragm equalization
Assignee: Combustion Engineering Inc
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Filing: 1969-06-23
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Granted: 1971-02-16
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Expires: 1989-06-23
Abstract
Abstract A pair of nominally identical diaphragms are rigidly interconnected with the end of a bar to deflect same. A connector on the end of the bar has an oblique circumferential track. Stems on the diaphragms are clamped in the track. To adjust for diaphragm differences, the stems are unclamped and the connector is rotated to shift the stems, the one stem moving toward the axis of bar deflection, and the other moving away therefrom. In this way, the difference between the diaphragms'' responses to pressure is neutralized by difference in effective lever arm of said diaphragms on said bar. The connector may be in the form of two like cylinders, each having nonparallel bases and clamping the stems between them.
Inventors
- 👤 James A Symonds
- 👤 John J Callahan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 19:38
CPC Classifications
F; F15; F15B; F15B5/00; G; G01; G01L; G01L13/00; G01L13/02; G01L13/025
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
235 words
In a differential pressure responsive device comprising a first fluid pressure-deflectible wall having a first effective area, a second fluid prEssure-deflectible wall having a second effective area, said first wall being mounted for deflection of its effective area in response to a first fluid pressure applied thereto, said second wall being mounted for deflection of its effective area in response to a second fluid pressure applied thereto, and both walls having mechanism interconnecting said walls for producing motion in proportion to the difference between said pressures, said mechanism including a bar angularly deflectibly pivoted at one portion thereof, and having a connector fixed to another portion thereof and to said effective areas for translating deflection of said walls into angular deflection of said bar, the improvement wherein said connector is a right circular cylinder having a track around the circumference thereof, the locus of said track being an elliptical cross section of said cylinder, a first follower interengaging said track and said first effective area, a second follower interengaging said track and said second effective area, the place at which said first follower engages said track being spaced around the circumference from the place at which said second follower engages said track; said cylinder having its cylinder axis lying along the length of said bar between the said portions thereof and said walls being oriented so that their deflections are normal to said cylinder axis.
Claim 2
Dependent Claim
235 words
In a differential pressure responsive device comprising a first fluid pressure-deflectible wall having a first effective area, a second fluid prEssure-deflectible wall having a second effective area, said first wall being mounted for deflection of its effective area in response to a first fluid pressure applied thereto, said second wall being mounted for deflection of its effective area in response to a second fluid pressure applied thereto, and both walls having mechanism interconnecting said walls for producing motion in proportion to the difference between said pressures, said mechanism including a bar angularly deflectibly pivoted at one portion thereof, and having a connector fixed to another portion thereof and to said effective areas for translating deflection of said walls into angular deflection of said bar, the improvement wherein said connector is a right circular cylinder having a track around the circumference thereof, the locus of said track being an elliptical cross section of said cylinder, a first follower interengaging said track and said first effective area, a second follower interengaging said track and said second effective area, the place at which said first follower engages said track being spaced around the circumference from the place at which said second follower engages said track; said cylinder having its cylinder axis lying along the length of said bar between the said portions thereof and said walls being oriented so that their deflections are normal to said cylinder axis.
Claim 3
Dependent Claim
29 words
The invention of claim 1, wherein said followers are flexible, thrust-transmitting stems, each having one end fixed to the corresponding said wall, and its other end to said track.
Claim 4
Dependent Claim
26 words
The invention of claim 1, wherein said track is a groove, and each said follower is a stem means having one end fixed in said groove.
Claim 5
Dependent Claim
60 words
The invention of claim 1, wherein said track is a groove, and said cylinder includes a first element having one circular base and one elliptical base, and a like second element, and there being means interconnecting said first and second elements with their elliptical bases juxtaposed, substantially parallel to each other, and spaced from each other to define said track.
Claim 6
Dependent Claim
20 words
the invention of claim 1, wherein said cylinder is an annular member, said track being a slot through said member.
Claim 7
Dependent Claim
48 words
The invention of claim 5, wherein said annular member includes two annular elements, each having a circular base and an elliptical base, there being means interconnecting said two elements with their elliptical bases juxtaposed, substantially parallel to each other, and spaced from each other to define said slot.
Claim 8
Dependent Claim
44 words
The invention of claim 1, wherein said cylinder is a pair of annular elements having the end of said bar extending therethrough, said followers extending between said elements, and being clamped therebetween, and also spacing said elements one from another to define said track.
Claim 9
Dependent Claim
30 words
The invention of claim 7, wherein said end of said bar is a sleeve having a diametral slot extending through said elements, and said followers each extending into said slot.
Claim 10
Dependent Claim
44 words
The invention of claim 8, wherein said followers are stems having their ends in said slot, and bent over against the inside of one of said annular elements, and there being means in said sleeve clamping said ends of said stems against said inside.
Claim 11
Dependent Claim
37 words
The invention of claim 1, wherein said followers are cylindrical stems extending into said track, said track being defined by opposing surfaces on said cylinder, said surfaces being line tangent to the cylindrical surfaces of said stems.
Claim 12
Dependent Claim
51 words
The invention of claim 10, wherein said cylinder is in two relatively movable elements, each having a surface facing a surface of the other, the last two said surfaces being the aforesaid opposing surfaces, and there being means clamping said relatively movable elements together so as to clamp said stems therebetween.
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) | 1974-02-15 | 1974-08-17 | 1975-02-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-02-15 | 1978-08-17 | 1979-02-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-02-15 | 1982-08-17 | 1983-02-16 | $7700.00 | Window Closed / Lapsed |