US3775622A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Device for the suppression of reactions involving undue pressure rise in large-size containers
Assignee: LIST H OE
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Filing: 1972-10-20
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Granted: 1973-11-27
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Expires: 1992-10-20
Abstract
Abstract A device for the suppression of reactions involving undue pressure rise in large-size containers having an explosive or thermo-chemically reacting contents, comprising a pressure sensor exposed to the internal pressure of the container controlling a pressure relieving device via two parallel-connected contact assemblies, one of the contact assemblies responding to the transgression of a predetermined value of the internal pressure of the container and the second contact assembly responding to the transgression of a predetermined pressure rise per unit of time.
Inventors
- 👤 G Fredericks
- 👤 R Zeiringer
- 👤 K Wiederwohl
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 04:53
CPC Classifications
B; B01; B01J; B01J19/00; B01J19/0006; B01J19/002; B65; B65D; B65D90/00; B65D90/22; B65D90/32; B65D90/34; B01J2219/00; B01J2219/00049; B01J2219/00245; B01J2219/0027; Y; Y10; Y10T; Y10T137/00; Y10T137/7722; Y10T137/7758; Y10T137/7761
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
187 words
A device for the suppression of reactions involving undue pressure rise in large-size containers with an explosive or thermo-chemically reacting contents, comprising at least one pressure sensor exposed to the internal pressure of the container and having an output delivering an electric signal corresponding to the internal pressure, two contact assemblies each having an input and an output, the inputs of the two contact assemblies being connected in parallel and connected with the output of the pressure sensor, the first of the contact assemblies responding to an input voltage designating the transgression of a predetermined pressure value and releasing an output signal, the second contact assembly responding to an input voltage designating the transgression of a predetermined pressure increase per unit time and releasing an output signal, an ANDgate having two inputs and an output, the first of said inputs being connected to the output of the first contact assembly and the second input of the AND-gate connected with the output of the second contact assembly, a pressure-relieving device connected to the output of the AND-gate and releasable by means of the output pulses of the AND-gate.
Claim 2
Independent Claim
187 words
A device for the suppression of reactions involving undue pressure rise in large-size containers with an explosive or thermo-chemically reacting contents, comprising at least one pressure sensor exposed to the internal pressure of the container and having an output delivering an electric signal corresponding to the internal pressure, two contact assemblies each having an input and an output, the inputs of the two contact assemblies being connected in parallel and connected with the output of the pressure sensor, the first of the contact assemblies responding to an input voltage designating the transgression of a predetermined pressure value and releasing an output signal, the second contact assembly responding to an input voltage designating the transgression of a predetermined pressure increase per unit time and releasing an output signal, an ANDgate having two inputs and an output, the first of said inputs being connected to the output of the first contact assembly and the second input of the AND-gate connected with the output of the second contact assembly, a pressure-relieving device connected to the output of the AND-gate and releasable by means of the output pulses of the AND-gate.
Claim 3
Dependent Claim
126 words
A device according to claim 1, providing a first analog-to-digital converter forming the first contact assembly, a differentiating circuit having an output, an amplifier with an input and an output, the input of the amplifier being connected with the output of the differentiating circuit, a second analog-to-digital converter connected to the output of the amplifier, the differentiating circuit, the amplifier and the second analog-to-digital converter forming the second contact assembly, each of the two analog-to-digital converters comprising a differential amplifier having a positive input, a negative input and an output, a resistor preceding the negative input of the differential amplifier, a voltage regulator fed by means of a reference voltage, the negative inputs of both differential amplifiers being connected via the resistors to the voltage regulator.
Claim 4
Dependent Claim
25 words
A device according to claim 2, providing one reaction resistor each inserted between the positive input and the output of each of the differential amplifiers.
Claim 5
Dependent Claim
26 words
A device according to claim 1, providing a pre-amplifier inserted between the output of the pressure sensor and the parallel-connected inputs of the two contact assemblies.
Claim 6
Dependent Claim
23 words
A device according to claim 4, wherein the pressure sensor and the pre-amplifier are combined so as to constitute a common structural unit.
Claim 7
Dependent Claim
27 words
A device according to claim 4, providing a low-pass filter connected between the output of the said pre-amplifier and the parallel-connected inputs of the two contact assemblies.
Claim 8
Dependent Claim
160 words
A device according to claim 1, comprising an additional circuit for the suppression of thermo-chemical reaCtions, comprising a monostable switch step with an input and an output, the input of the monostable switch step being connected with the output of the first contact assembly, a pulse shaper with an input and an output, the input of the pulse shaper being connected with the output of the monostable switch step, a reversing stage with an input and an output, the input of the reversing stage being connected with the output of the second contact assembly, a bistable switch step having a clock input, a preparatory input, a resetting input and an output, the clock input of the bistable switch step being connected with the output of the pulse shaper, the preparatory input being connected to the output of the reversing stage and the resetting input connected with a switch for the resetting of the bistable switch step into the initial position.
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) | 1976-11-26 | 1977-05-28 | 1977-11-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-11-26 | 1981-05-28 | 1981-11-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-11-26 | 1985-05-28 | 1985-11-27 | $7700.00 | Window Closed / Lapsed |