US3884530A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for regulating the control current to the electric brake system of a trailer
Assignee: Linde International AB
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Filing: 1973-10-10
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Granted: 1975-05-20
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Expires: 1993-10-10
Abstract
Abstract An apparatus for regulating the control current from the brake system of a tractor to the electric brake system of a trailer comprises a brake regulator connectible to the brake system of the tractor and having at least one piston, membrane, or similar device operable by the braking medium of the tractor brake system. The piston, membrane or similar device, when displaced by the braking medium against the action of a spring, being adapted to produce minute incremental variations of the current in an electronic circuit, the variations being converted into continuous variations of the voltage in the control circuit of the electric brake system of the trailer, so that a substantially continuous voltage is emitted from the control circuit in proportion to the braking of the tractor. In this context, the piston, membrane or similar device is fitted with a mutually movable portion which is adapted to actuate, across an air gap, a member fixedly attached to the electronic circuit, the variation of the width of said air gap varying the current in the electronic circuit.
Inventors
- 👤 Rune Nilsson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 19:29
CPC Classifications
B; B60; B60T; B60T13/00; B60T13/10; B60T13/58; B60T13/74
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
175 words
An apparatus for regulating the control current from the brake system of a tractor to the electric brake system of a trailer, said apparatus comprising a brake regulator connectible to the brake system of the tractor and having at least one piston, membrane, or similar device operable by the braking medium of the tractor brake system, said piston, membrane, or similar device, when displaced by the braking medium against the action of a spring, being adapted to produce minute incremental variations of the current in an electronic circuit converted into continuous variations of the voltage in the control circuit of the electric brake system of the trailer, so that a substantially continuous voltage is emitted from the control circuit in proportion to the braking of the tractor, wherein the piston, membrane, or similar device is associated with a movable portion which is adapted to actuate, across an air gap, a member which is fixedly attached to the electronic circuit, the variation of the width of said air gap varying the inductance in said electronic circuit.
Claim 2
Independent Claim
175 words
An apparatus for regulating the control current from the brake system of a tractor to the electric brake system of a trailer, said apparatus comprising a brake regulator connectible to the brake system of the tractor and having at least one piston, membrane, or similar device operable by the braking medium of the tractor brake system, said piston, membrane, or similar device, when displaced by the braking medium against the action of a spring, being adapted to produce minute incremental variations of the current in an electronic circuit converted into continuous variations of the voltage in the control circuit of the electric brake system of the trailer, so that a substantially continuous voltage is emitted from the control circuit in proportion to the braking of the tractor, wherein the piston, membrane, or similar device is associated with a movable portion which is adapted to actuate, across an air gap, a member which is fixedly attached to the electronic circuit, the variation of the width of said air gap varying the inductance in said electronic circuit.
Claim 3
Independent Claim
188 words
An apparatus for regulating the control current from the brake system of a tractor to the electric brake system of a trailer, said apparatus comprising a brake regulator connectible to the brake system of the tractor and having at least one piston, membrane, or similar device operable by the braking medium of the tractor brake system, said piston, membrane, or similar device, when displaced by the braking medium against the action of a spring, being adapted to produce minute incremental variations of the current in an electronic circuit converted into continuous variations of the voltage in the control circuit of the electric brake system of the trailer, so that a substantially continuous voltage is emitted from the control circuit in proportion to the braking of the tractor, wherein the piston, membrane, or similar device is associated with a movable portion which is a ferrite plate adapted to actuate, across an air gap, a member which is fixedly attached to the electronic circuit and comprises a coil, the variation of the width of said air gap being designed to produce a variation in the inductance of the electronic circuit.
Claim 4
Independent Claim
188 words
An apparatus for regulating the control current from the brake system of a tractor to the electric brake system of a trailer, said apparatus comprising a brake regulator connectible to the brake system of the tractor and having at least one piston, membrane, or similar device operable by the braking medium of the tractor brake system, said piston, membrane, or similar device, when displaced by the braking medium against the action of a spring, being adapted to produce minute incremental variations of the current in an electronic circuit converted into continuous variations of the voltage in the control circuit of the electric brake system of the trailer, so that a substantially continuous voltage is emitted from the control circuit in proportion to the braking of the tractor, wherein the piston, membrane, or similar device is associated with a movable portion which is a ferrite plate adapted to actuate, across an air gap, a member which is fixedly attached to the electronic circuit and comprises a coil, the variation of the width of said air gap being designed to produce a variation in the inductance of the electronic circuit.
Claim 5
Dependent Claim
67 words
An apparatus according to claim 2, wherein the electronic circuit is movably arranged in relation to a unit which is fitted with the piston, membrane or similar device, and may be locked in its different shifting positions for the purposes of adjusting the air gap between the portion shiftable with said piston, membrane or similar device and the portion which is fixedly attached to the electronic circuit.
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) | 1978-05-19 | 1978-11-18 | 1979-05-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-05-19 | 1982-11-18 | 1983-05-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-05-19 | 1986-11-18 | 1987-05-20 | $7700.00 | Window Closed / Lapsed |