Patent US3848878A successfully refreshed from Google Patents.
US3848878A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Device for producing a series of electrical pulses, whose frequency is proportional to the speed of rotation of the wheel of a motor vehicle
Assignee: Allgemeine Industrie Commerz Walter von Weizenbeck
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Filing: 1973-09-25
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Granted: 1974-11-19
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Expires: 1993-09-25
Abstract
Abstract The specification describes a sensor adapted to produce a pulsed signal, whose frequency is proportional to the speed of rotation of a motor vehicle wheel. A PTFE seal preventing access of dirt and ice is adapted to be opened centrifugally during running to reduce wear of the sealing surfaces.
Inventors
- 👤 F Mayer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 18:48
CPC Classifications
G; G01; G01P; G01P3/00; G01P3/42; G01P3/44; G01P3/48; G01P3/481; G01P3/486; B; B60; B60T; B60T1/00; B60T1/02; B60T1/06; B60T1/065; B60T8/00; B60T8/32; B60T8/72; G01P3/443
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
178 words
A device for producing a series of electric pulses, whose frequency is proportional to the speed of rotation of a motor vehicle wheel having a brake element associated therewith and which is to be monitored as regards its braking behavior, characterized by a concentric ring, which is fixed to the chassis of the vehicle and is concentric to the wheel axis, the ring having a conical outer surface, a sleeve-shaped body which is also concentric with respect to the wheel axis and which is fixed to the brake element, and a ring which consists of wear-resistant elastic plastics material and is fixed at the edge of the sleeveshaped body, the latter ring having a conical inner surface, and having on its outer surface a number of centrifugal weights in such a manner that the inner surface of the plastics material ring rubs or engages the conical outer surface in the case of low speeds of rotation of the wheel, while in the case of higher speeds of rotation of the wheel it moves clear of the outer surface.
Claim 2
Independent Claim
178 words
A device for producing a series of electric pulses, whose frequency is proportional to the speed of rotation of a motor vehicle wheel having a brake element associated therewith and which is to be monitored as regards its braking behavior, characterized by a concentric ring, which is fixed to the chassis of the vehicle and is concentric to the wheel axis, the ring having a conical outer surface, a sleeve-shaped body which is also concentric with respect to the wheel axis and which is fixed to the brake element, and a ring which consists of wear-resistant elastic plastics material and is fixed at the edge of the sleeveshaped body, the latter ring having a conical inner surface, and having on its outer surface a number of centrifugal weights in such a manner that the inner surface of the plastics material ring rubs or engages the conical outer surface in the case of low speeds of rotation of the wheel, while in the case of higher speeds of rotation of the wheel it moves clear of the outer surface.
Claim 3
Dependent Claim
31 words
A device in accordance with claim 1, characterized in that a protective ring is fixed on the chassis of the vehicle, the ring being concentric to the wear-resistant elastic plastics ring.
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) | 1977-11-18 | 1978-05-20 | 1978-11-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-11-18 | 1982-05-20 | 1982-11-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-11-18 | 1986-05-20 | 1986-11-19 | $7700.00 | Window Closed / Lapsed |