Patent US4244993A successfully refreshed from Google Patents.
Patent US4074576A successfully refreshed from Google Patents.
US4074576A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fluid pressure measuring device
Assignee: Individual
•
Filing: 1975-07-28
•
Granted: 1978-02-21
•
Expires: 1995-07-28
Abstract
Abstract A fluid pressure transducer comprising a resilient member located in a housing and made in the form of a sleeve whose open end receives a fluid, the pressure of which is to be is measured. Said resilient member accommodates a vibrating member secured, on two supports, parallel to the longitudinal axis of said resilient member, said vibrating member being made to oscillate by means of an exciter. The frequency variation of the vibrating member oscillations when the pressure of the supplied fluid acts upon the resilient member is used to measure said pressure. The fluid pressure transducer is compact and convenient in operation.
Inventors
- 👤 Lev Dmitrievich Bryzzhev
- 👤 Viktor Semenovich Kupko
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 03:06
CPC Classifications
G; G01; G01L; G01L9/00; G01L9/0001; G01L9/0008
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
135 words
A fluid pressure transducer comprising: a housing; a resilient member located in said housing and made in the form of a sleeve whose open end receives a fluid the pressure of which is to be measured; a vibrating member in the form of a strip and having end faces, said vibrating member being located on a side surface of said resilient member and being parallel to its axis; two supports for securing the end faces of the vibrating member to said resilient members; an excitor located in said housing and intended to induce oscillations in said vibrating member, said excitor including means for generating a signal having a frequency which varies under the effect of the fluid pressure upon said resilient member by a value proportional to the variation in the vibrating member oscillation frequency.
Claim 2
Dependent Claim
135 words
A fluid pressure transducer comprising: a housing; a resilient member located in said housing and made in the form of a sleeve whose open end receives a fluid the pressure of which is to be measured; a vibrating member in the form of a strip and having end faces, said vibrating member being located on a side surface of said resilient member and being parallel to its axis; two supports for securing the end faces of the vibrating member to said resilient members; an excitor located in said housing and intended to induce oscillations in said vibrating member, said excitor including means for generating a signal having a frequency which varies under the effect of the fluid pressure upon said resilient member by a value proportional to the variation in the vibrating member oscillation frequency.
Claim 3
Dependent Claim
26 words
A fluid pressure measuring device according to claim 1, wherein the housing includes a base, a casing, and means for attaching said base to said casing.
Claim 4
Dependent Claim
23 words
A fluid pressure measuring device according to claim 2, wherein the means for attaching said base to said casing is a threaded connection.
Claim 5
Dependent Claim
25 words
A fluid pressure measuring device according to claim 2, wherein the base includes a union and means for mounting said transducer on an external device.
Claim 6
Dependent Claim
24 words
A fluid pressure measuring device according to claim 4, wherein the means for mounting is a threaded connection at one end of said union.
Claim 7
Dependent Claim
31 words
A fluid pressure measuring device according to claim 2, wherein the casing includes a connector for connection of a power supply to the transducer and for extracting of an electric signal.
Claim 8
Dependent Claim
31 words
A fluid pressure measuring device according to claim 2, wherein the resilient member is fastened to the base by means of a thread and sealed therewith by means of a gasket.
Claim 9
Dependent Claim
26 words
A fluid pressure measuring device according to claim 1, wherein the resilient member, the supports and the vibrating member are made as a single, unitary unit.
Claim 10
Dependent Claim
35 words
A fluid pressure measuring device according to claim 1, wherein the exciter includes two electromagnetic coils, a frame on which said coils are arranged, and means for securing said frame on one of said supports.
Claim 11
Dependent Claim
33 words
A fluid pressure measuring device according to claim 9, further including an amplifier, whose inputs and outputs are connected to said electromagnetic coils, and which is powered by an external constant voltage source.
Claim 12
Dependent Claim
23 words
The fluid pressure measuring device according to claim 1, further comprising means for measuring the frequency of the oscillations of said vibrating member.
References Cited (Backward Citations)
US3399572A
Cited
US3863505A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1981-02-20 | 1981-08-22 | 1982-02-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-02-20 | 1985-08-22 | 1986-02-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-02-20 | 1989-08-22 | 1990-02-21 | $7700.00 | Window Closed / Lapsed |