US4738141A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pressure sensor
Assignee: Robert Bosch GmbH
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Filing: 1986-12-17
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Granted: 1988-04-19
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Expires: 2006-12-17
Abstract
Abstract An improved pressure sensor includes a Bourdon tube, as its sensing element, and an indicator controlled thereby. At least one tightly closed container is secured to a free end of the Bourdon tube and is partly filled with a bulk material. If the Bourdon tube is made to vibrate as a result of pressure shocks or vibration forces acting upon its fixed end frictional forces that consume vibration energy arise between the container and the amounts of bulk material contained. The indicator includes Hall elements and permanent magnets, which magnets are secured on the Bourdon tube and are moved by it relative to the Hall elements.
Inventors
- 👤 Gunter Kas
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 22:51
CPC Classifications
G; G01; G01L; G01L9/00; G01L9/14; G01L9/0026
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
52 words
A pressure sensor comprising a Bourdon tube, one end of said Bourdon tube being fixed, said Bourdon tube further including a free end associated with a contactless indicator, said contactless indicator including a tightly closed container and said container being at least partially filled with a damping agent comprising a bulk material.
Claim 2
Dependent Claim
52 words
A pressure sensor comprising a Bourdon tube, one end of said Bourdon tube being fixed, said Bourdon tube further including a free end associated with a contactless indicator, said contactless indicator including a tightly closed container and said container being at least partially filled with a damping agent comprising a bulk material.
Claim 3
Dependent Claim
29 words
A pressure sensor as defined by claim 1 in which at least one additional container having bulk material is associated with said movable free end of said Bourdon tube.
Claim 4
Dependent Claim
21 words
A pressure sensor as defined by claim 2, in which said containers are of different lengths in their directions of movement.
Claim 5
Dependent Claim
21 words
A pressure sensor as defined by claim 3, in which said containers are filled with different amounts of said bulk material.
Claim 6
Dependent Claim
40 words
A pressure sensor as defined by claim 4, in which said indicator further comprises at least one Hall element disposed in a fixed manner and at least one permanent magnet joined to said movable free end of said Bourdon tube.
Claim 7
Dependent Claim
20 words
A pressure sensor as defined by claim 3, in which said containers are filled with different types of bulk material.
Claim 8
Dependent Claim
40 words
A pressure sensor as defined by claim 3, in which said indicator further comprises at least one Hall element disposed in a fixed manner and at least one permanent magnet joined to said movable free end of said Bourdon tube.
Claim 9
Dependent Claim
21 words
A pressure sensor as defined by claim 2, in which said containers are filled with different amounts of said bulk material.
Claim 10
Dependent Claim
20 words
A pressure sensor as defined by claim 8, in which said containers are filled with different types of bulk material.
Claim 11
Dependent Claim
40 words
A pressure sensor as defined by claim 8, in which said indicator further comprises at least one Hall element disposed in a fixed manner and at least one permanent magnet joined to said movable free end of said Bourdon tube.
Claim 12
Dependent Claim
20 words
A pressure sensor as defined by claim 2, in which said containers are filled with different types of bulk material.
Claim 13
Dependent Claim
40 words
A pressure sensor as defined by claim 2, in which said indicator further comprises at least one Hall element disposed in a fixed manner and at least one permanent magnet joined to said movable free end of said Bourdon tube.
Claim 14
Dependent Claim
40 words
A pressure sensor as defined by claim 1, in which said indicator further comprises at least one Hall element disposed in a fixed manner and at least one permanent magnet joined to said movable free end of said Bourdon tube.
Claim 15
Dependent Claim
32 words
A pressure sensor as defined by claim 13, in which said at least one permanent magnet is disposed such that it is adjustable relative to the Hall element by a threaded means.
Claim 16
Dependent Claim
22 words
A pressure sensor as defined by claim 14, in which said permanent magnet is secured by means of a self-locking threaded means.
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) | 1991-04-19 | 1991-10-19 | 1992-04-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-04-19 | 1995-10-19 | 1996-04-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-04-19 | 1999-10-19 | 2000-04-19 | $7700.00 | Window Closed / Lapsed |