Patent US4463312A successfully refreshed from Google Patents.
US4463312A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Speed sensor device
Assignee: Aisin Corp
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Filing: 1982-04-12
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Granted: 1984-07-31
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Expires: 2002-04-12
Abstract
Abstract A speed sensor device incorporates a reed switch which is controlled by the changes in the density of the magnetic flux in response to the displacement of a permanent magnet. The device comprises at least one permanent magnet positioned on a rotational shaft, a reed switch opened and closed in response to the rotational displacement of the permanent magnet, an elastic member protecting the periphery of the reed switch, a body member being made of a material having excellent electric conduction and receiving the reed switch, a supporter being in a thin plate form and also being made of a material having excellent electric conduction, and a projection formed on the supporter serving to secure the supporter to the body member.
Inventors
- 👤 Yukihisa Oda
- 👤 Naoji Sakakibara
- 👤 Hiroyuki Amano
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 23:46
CPC Classifications
G; G01; G01P; G01P3/00; G01P3/42; G01P3/44; G01P3/48; G01P3/481; G01P3/484
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
118 words
A speed sensor device comprising: permanent magnet means positioned on a rotational shaft; a reed switch operably opened and closed in response to the rotational displacement of said pemanent magnet means; an elastic member protecting the periphery of said reed switch; a body member formed of an electrically conductive material; said reed switch being positioned in said body member through said elastic member; a supporter being in the form of a thin plate and being formed of an electrically conductive material; said reed switch having a terminal contacted with one end of said supporter; and projection means formed on the other end of said supporter; said supporter pushed and contacted with said body member through said projection means.
Claim 2
Dependent Claim
118 words
A speed sensor device comprising: permanent magnet means positioned on a rotational shaft; a reed switch operably opened and closed in response to the rotational displacement of said pemanent magnet means; an elastic member protecting the periphery of said reed switch; a body member formed of an electrically conductive material; said reed switch being positioned in said body member through said elastic member; a supporter being in the form of a thin plate and being formed of an electrically conductive material; said reed switch having a terminal contacted with one end of said supporter; and projection means formed on the other end of said supporter; said supporter pushed and contacted with said body member through said projection means.
Claim 3
Dependent Claim
28 words
A speed sensor device according to claim 1, wherein said other end of said supporter is provided with a circular portion on which said projection means is formed.
Claim 4
Dependent Claim
29 words
A speed sensor device according to claim 1 wherein said thin plate of said supporter is interposed between said elastic member and an inner wand of said body member.
Claim 5
Dependent Claim
28 words
A speed sensor device according to claim 1 wherein a cylindrical rotor is fixed on said rotational shaft and said permanent magnet means is fixed to said rotor.
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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) | 1987-07-31 | 1988-01-30 | 1988-07-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-07-31 | 1992-01-30 | 1992-07-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-07-31 | 1996-01-30 | 1996-07-31 | $7700.00 | Window Closed / Lapsed |