Patent US3870911A successfully refreshed from Google Patents.
US3870911A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Wheel speed detector for vehicles
Assignee: Denso Corp
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Filing: 1973-06-19
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Granted: 1975-03-11
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Expires: 1993-06-19
Abstract
Abstract A wheel speed detector for vehicles in which a stator including a coil and a magnet is secured to a stationary plate which is fitted coaxially to an axle or an axle housing so that the stator can be readily positioned coaxially with respect to the axle. The stator is also disposed between a wheel hub and a brake disc and serrations are provided on either the wheel hub or the brake disc in an opposite relation to the stator so that an alternating current is produced in the coil with a frequency correspsonding to the rotational speed of the wheel and thus the rotor.
Inventors
- 👤 Koichi Toyama
- 👤 Koichi Taniguchi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 05:05
CPC Classifications
B; B60; B60T; B60T8/00; B60T8/32; B60T8/321; B60T8/329; G; G01; G01P; G01P3/00; G01P3/42; G01P3/44; G01P3/443; G01P3/48; G01P3/481; G01P3/488
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
161 words
A wheel speed detector for vehicles comprising: a nonrotatable axle, a wheel hub coaxially rotatably mounted on said axle through bearings, said wheel hub being made of magnetic material, brake disc means connected to the outer periphery side of said wheel hub in a coaxially rotatable relation to said axle, a stationary plate directly snugly fitted on the outer peripheral surface of said axle in a coaxial relation therewith, electric power generating means secured to said stationary plate and disposed in an enclosure defined by the outer surface of said wheel hub and the inner surface of said brake disc means, said generating means including annular coil means with its turns forming concentric circles with respect to said axle and annular permanent magnet means disposed around the outer periphery of said coil means, and a plurality of serrations disposed in an opposite relation with respect to said generating means and directly provided on the outer peripheral surface of said wheel hub.
Claim 2
Dependent Claim
161 words
A wheel speed detector for vehicles comprising: a nonrotatable axle, a wheel hub coaxially rotatably mounted on said axle through bearings, said wheel hub being made of magnetic material, brake disc means connected to the outer periphery side of said wheel hub in a coaxially rotatable relation to said axle, a stationary plate directly snugly fitted on the outer peripheral surface of said axle in a coaxial relation therewith, electric power generating means secured to said stationary plate and disposed in an enclosure defined by the outer surface of said wheel hub and the inner surface of said brake disc means, said generating means including annular coil means with its turns forming concentric circles with respect to said axle and annular permanent magnet means disposed around the outer periphery of said coil means, and a plurality of serrations disposed in an opposite relation with respect to said generating means and directly provided on the outer peripheral surface of said wheel hub.
References Cited (Backward Citations)
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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) | 1978-03-10 | 1978-09-09 | 1979-03-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-03-10 | 1982-09-09 | 1983-03-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-03-10 | 1986-09-09 | 1987-03-11 | $7700.00 | Window Closed / Lapsed |