US3651827A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pressure relief and indicator device
Assignee: Purolator Courier Corp
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Filing: 1970-01-13
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Granted: 1972-03-28
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Expires: 1990-01-13
Abstract
Abstract A device which senses a differential pressure across a system having a high pressure side and a low pressure side and which at a predetermined pressure of pressure difference functions to bypass the flow from the high pressure to the low pressure side. There is pressure responsive means and indicator means, the indicator means functioning upon the pressure sensitive means moving in response to an increase in differential pressure.
Inventors
- 👤 Kurt F Hammer
- 👤 Wilbur A Meyer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 01:06
CPC Classifications
F; F16; F16K; F16K37/00; F16K37/0025; F16K37/0033; B; B01; B01D; B01D35/00; B01D35/14; B01D35/143; B01D35/147; F16K17/00; F16K17/02; F16K17/04; F16K37/0041; Y; Y10; Y10T; Y10T137/00; Y10T137/7722; Y10T137/7738; Y10T137/8158; Y10T137/8225; Y10T137/8275; Y10T137/8292; Y10T137/8326
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
214 words
A pressure indicator and bypass and pressure relief device, the combination including: a. a body having a chamber which has a high pressure inlet and a low pressure outlet with a seat adjacent to said high pressure inlet and with a pressure pocket located adjacent to and downstream of said seat; b. a piston movable in said chamber and exposed on one side to high pressure and on the other side to low pressure, said piston having a valve means adapted to engage said valve seat; and c. indicator means movable into a position to indicate an initial movement of said piston, said indicator means comprising an indicator element movable within a second chamber in said body, said second chamber having a wall structurally separating it from the first chamber in said body, indicator operating means carried by said piston and movable to actuate said indicator means, means connected between said pressure pocket and said indicator operating means whereby upon initial movement of said piston away from said fluid under pressure may flow to said indicator operating means to operate same, and said indicator element being adapted to move within said second chamber in a direction toward and away from the first chamber due to cooperative interaction with said pressure actuated indicator operating means.
Claim 2
Dependent Claim
214 words
A pressure indicator and bypass and pressure relief device, the combination including: a. a body having a chamber which has a high pressure inlet and a low pressure outlet with a seat adjacent to said high pressure inlet and with a pressure pocket located adjacent to and downstream of said seat; b. a piston movable in said chamber and exposed on one side to high pressure and on the other side to low pressure, said piston having a valve means adapted to engage said valve seat; and c. indicator means movable into a position to indicate an initial movement of said piston, said indicator means comprising an indicator element movable within a second chamber in said body, said second chamber having a wall structurally separating it from the first chamber in said body, indicator operating means carried by said piston and movable to actuate said indicator means, means connected between said pressure pocket and said indicator operating means whereby upon initial movement of said piston away from said fluid under pressure may flow to said indicator operating means to operate same, and said indicator element being adapted to move within said second chamber in a direction toward and away from the first chamber due to cooperative interaction with said pressure actuated indicator operating means.
Claim 3
Dependent Claim
56 words
A combination as defined in claim 1 in which said indicator element comprises: a. an indicator element body movable within the second chamber; b. a magnet having north and south poles carried by said body; and c. a spring supported within the second chamber and adapted to urge said indicator element body toward the first chamber.
Claim 4
Dependent Claim
15 words
a magnet having a north and south pole carried by said indicator element body; and
Claim 5
Dependent Claim
15 words
a magnet having a north and south pole carried by said indicator element body; and
Claim 6
Dependent Claim
31 words
a magnet having a north and south pole carried by said second piston, said magnet being oriented so as to urge separation of said second piston and said indicator element, and
Claim 7
Dependent Claim
31 words
a magnet having a north and south pole carried by said second piston, said magnet being oriented so as to urge separation of said second piston and said indicator element, and
Claim 8
Dependent Claim
46 words
means for urging said second piston toward the low pressure end of said first chamber; and f. bleed means operable when said piston has moved a short distance from its seat in combination with means for directing high pressure fluid to operate said indicator operating means.
Claim 9
Dependent Claim
46 words
means for urging said second piston toward the low pressure end of said first chamber; and f. bleed means operable when said piston has moved a short distance from its seat in combination with means for directing high pressure fluid to operate said indicator operating means.
Claim 10
Dependent Claim
29 words
means within said second chamber for biasing said indicator element body toward said first chamber; e. pressure operated indicator operating means carried by said first piston, said means comprising:
Claim 11
Dependent Claim
29 words
means within said second chamber for biasing said indicator element body toward said first chamber; e. pressure operated indicator operating means carried by said first piston, said means comprising:
Claim 12
Dependent Claim
115 words
A combination as defined in claim 2 in which said indicator operating means comprises: a. an indicator operating piston supported within the first chamber in said body, said piston being adapted to move within the first chamber in a direction toward and away from said indicator element; b. a magnet having north and south poles carried by said indicator operating piston, said magnet being arranged so that as said piston moves toward said indicator element said magnet presents a like pole to the proximate pole of said magnet of said indicator element; and c. a spring supported within the first chamber and adapted to urge said piston in a direction away from said indicator element.
Claim 13
Dependent Claim
115 words
A pressure indicator and bypass pressure relief device, the combination including: a. a first chamber adapted to be connected to a high pressure zone and a low pressure zone with a seat positioned at the high pressure end of said chamber; b. a second chamber adjacent the low pressure end of said first chamber, said second chamber having a dividing wall separating said first and second chamber; c. a first piston movable in said first chamber, said piston being exposed on one side to high pressure and on the other side to low pressure, said piston having a valve face adapted to engage said seat; d. an indicator element movable within said second chamber comprising:
Claim 14
Dependent Claim
115 words
A pressure indicator and bypass pressure relief device, the combination including: a. a first chamber adapted to be connected to a high pressure zone and a low pressure zone with a seat positioned at the high pressure end of said chamber; b. a second chamber adjacent the low pressure end of said first chamber, said second chamber having a dividing wall separating said first and second chamber; c. a first piston movable in said first chamber, said piston being exposed on one side to high pressure and on the other side to low pressure, said piston having a valve face adapted to engage said seat; d. an indicator element movable within said second chamber comprising:
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) | 1975-03-28 | 1975-09-27 | 1976-03-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-03-28 | 1979-09-27 | 1980-03-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-03-28 | 1983-09-27 | 1984-03-28 | $7700.00 | Window Closed / Lapsed |