US5207765A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sensor for thermal mass flowmeters
Assignee: SENSYCON GESELLSCHAFT fur INDUSTRIELLE SENSORSYSTEME und PROZEBLEITTECHNIK MBH
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Filing: 1991-08-16
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Granted: 1993-05-04
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Expires: 2011-08-16
Abstract
Abstract A sensor for thermal mass flowmeters is described herein. The sensor includes a plate-shaped, thin-film resistor and a cylindrical holder into which the resistor is fastened. In order to fasten the thin-film resistor in a mechanically stable manner, the end surface of the holder is provided with a pocket hole which closely matches the cross section of the thin-film resistor. The thin-film resistor is suitably inserted into this pocket hole and fastened therein with an adhesive agent.
Inventors
- 👤 Kurt Eiermann
- 👤 Dieter Link
- 👤 Martin Hohenstatt
- 👤 Reiner Goebel
- 👤 Juergen Schrode
- 👤 Andreas Gabel
- 👤 Andreas Hoehler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 18:22
CPC Classifications
H; H01; H01C; H01C1/00; H01C1/01; G; G01; G01F; G01F1/00; G01F1/68; G01F1/684; G01P; G01P5/00; G01P5/10; G01P5/12
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
188 words
A sensor for a thermal mass flow meter, said sensor comprising: a plate-shaped thin-film resistor, a holder in the shape of a cylindrical rod, and a tube tightly enclosing the cylindrical rod, wherein the holder includes an electrically insulating material and is provided with capillary drillings for receiving conductors connected to the thin-film resistor; wherein a first end of the holder defines a pocket hole which is adapted to receive the thin film resistor; said pocket hole being defined by a slit extending across said first end of the holder and by the enclosing tube; wherein a narrow end portion of the thin-film resistor is inserted into the pocket hole, whereby approximately 10 to 60% of the length of the thin-film resistor is received therein; wherein an area between a wall of the pocket hole and the received end portion of the thin-film resistor is filled with an adhesive substance; and wherein said holder in the shape of the cylindrical rod further includes a tapered portion which prevents contact between the cylindrical rod and the tube enclosing the rod over at least the length of the tapered portion.
Claim 2
Dependent Claim
188 words
A sensor for a thermal mass flow meter, said sensor comprising: a plate-shaped thin-film resistor, a holder in the shape of a cylindrical rod, and a tube tightly enclosing the cylindrical rod, wherein the holder includes an electrically insulating material and is provided with capillary drillings for receiving conductors connected to the thin-film resistor; wherein a first end of the holder defines a pocket hole which is adapted to receive the thin film resistor; said pocket hole being defined by a slit extending across said first end of the holder and by the enclosing tube; wherein a narrow end portion of the thin-film resistor is inserted into the pocket hole, whereby approximately 10 to 60% of the length of the thin-film resistor is received therein; wherein an area between a wall of the pocket hole and the received end portion of the thin-film resistor is filled with an adhesive substance; and wherein said holder in the shape of the cylindrical rod further includes a tapered portion which prevents contact between the cylindrical rod and the tube enclosing the rod over at least the length of the tapered portion.
Claim 3
Dependent Claim
23 words
A sensor according to claim 15, wherein the electrically insulating material of the holder is chosen from the group of ceramic or glass.
Claim 4
Dependent Claim
21 words
A sensor according to claim 1, wherein the adhesive substance is chosen from the group of glass frit or glass solder.
Claim 5
Dependent Claim
21 words
A sensor according to claim 2, wherein the adhesive substance is chosen from the group of glass frit or glass solder.
Claim 6
Dependent Claim
171 words
A sensor for a thermal mass flow meter, said sensor comprising: a plate-shaped thin-film resistor, a holder in the shape of a cylindrical rod, and a tube tightly enclosing the cylindrical rod, wherein the holder includes an electrically insulating material and is provided with capillary drillings for receiving conductors connected to the thin-film resistor; wherein a first end of the holder defines a pocket hole which is adapted to receive the thin film resistor; said pocket hole being defined by a slit extending across said first end of the holder and by the enclosing tube; wherein a narrow end portion of the thin-film resistor is inserted into the pocket hole, whereby approximately 10 to 60% of the length of the thin-film resistor is received therein; wherein an area between a wall of the pocket hole and the received end portion of the thin-film resistor is filled with an adhesive substance; and wherein said holder in the shape of the cylindrical rod includes two separate cylindrical rod portions separated by a gap.
Claim 7
Dependent Claim
171 words
A sensor for a thermal mass flow meter, said sensor comprising: a plate-shaped thin-film resistor, a holder in the shape of a cylindrical rod, and a tube tightly enclosing the cylindrical rod, wherein the holder includes an electrically insulating material and is provided with capillary drillings for receiving conductors connected to the thin-film resistor; wherein a first end of the holder defines a pocket hole which is adapted to receive the thin film resistor; said pocket hole being defined by a slit extending across said first end of the holder and by the enclosing tube; wherein a narrow end portion of the thin-film resistor is inserted into the pocket hole, whereby approximately 10 to 60% of the length of the thin-film resistor is received therein; wherein an area between a wall of the pocket hole and the received end portion of the thin-film resistor is filled with an adhesive substance; and wherein said holder in the shape of the cylindrical rod includes two separate cylindrical rod portions separated by a gap.
Claim 8
Dependent Claim
23 words
A sensor according to claim 5, wherein the electrically insulating material of the holder is chosen from the group of ceramic or glass.
Claim 9
Dependent Claim
21 words
A sensor according to claim 5, wherein the adhesive substance is chosen from the group of glass frit or glass solder.
Claim 10
Dependent Claim
21 words
A sensor according to claim 6, wherein the adhesive substance is chosen from the group of glass frit or glass solder.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1996-05-03 | 1996-11-02 | 1997-05-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2000-05-03 | 2000-11-02 | 2001-05-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2004-05-03 | 2004-11-02 | 2005-05-04 | $7700.00 | Window Closed / Lapsed |