US3619680A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Device for detecting the wheel speed of an automobile
Assignee: Denso Corp
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Filing: 1970-02-26
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Granted: 1971-11-09
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Expires: 1990-02-26
Abstract
Abstract A device for detecting the wheel speed of an automobile including a rotary disc of magnetic material having projections in the periphery thereof and attached to a transmission shaft in combination with a pulse signal generator having a magnet and a coil wound around the magnet. The pulse signal generator is mounted on the housing of an extension adjacent the rotary disc so that the rotation of the rotary disc produces a high-voltage level pulse signal proportional in number to the wheel speed.
Inventors
- 👤 Atutoshi Okamoto
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 01:31
CPC Classifications
G; G01; G01P; G01P3/00; G01P3/42; G01P3/44; G01P3/48; G01P3/481; G01P3/488
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
152 words
A device for detecting the Wheel speed of an automobile where the automobile is driven by a mechanical transmission and associated rotationally driven shafts having a housing thereabout wherein the rotational speeds of said driven shafts are higher than the rotational speed of the automobile wheel, said device comprising: a rotary disc made of magnetic material and having a plurality of projections provided in the outer periphery thereof, said rotary disc being secured to one of said rotationally driven shafts, and a pulse signal generator comprising a magnet and a coil assembly, said pulse signal generator being mounted on said housing with the magnet disposed in proximity to the outer periphery of the rotary disc whereby output pulse signals proportional in number to the wheel speed are produced with a higher voltage due to the increased rotational speed of said rotationally driven shafts with respect to the rotational speed of said wheel.
Claim 2
Independent Claim
152 words
A device for detecting the Wheel speed of an automobile where the automobile is driven by a mechanical transmission and associated rotationally driven shafts having a housing thereabout wherein the rotational speeds of said driven shafts are higher than the rotational speed of the automobile wheel, said device comprising: a rotary disc made of magnetic material and having a plurality of projections provided in the outer periphery thereof, said rotary disc being secured to one of said rotationally driven shafts, and a pulse signal generator comprising a magnet and a coil assembly, said pulse signal generator being mounted on said housing with the magnet disposed in proximity to the outer periphery of the rotary disc whereby output pulse signals proportional in number to the wheel speed are produced with a higher voltage due to the increased rotational speed of said rotationally driven shafts with respect to the rotational speed of said wheel.
Claim 3
Dependent Claim
39 words
A device as in claim 1 wherein said rotationally driven shaft comprises a driven output shaft of said transmission having an extended portion of said housing disposed thereabout with said pulse signal generator being mounted on said extended housing.
Claim 4
Dependent Claim
29 words
A device as in claim 1 wherein said rotationally driven shaft comprises an element of the transmission and said rotary disc comprises a magnetic gear element of said transmission.
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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) | 1974-11-08 | 1975-05-10 | 1975-11-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-11-08 | 1979-05-10 | 1979-11-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-11-08 | 1983-05-10 | 1983-11-09 | $7700.00 | Window Closed / Lapsed |