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US4819992A
Expired / Lapsed
US
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Duplex-type distributor for a pneumatic braking system for a motor vehicle equipped with an auxiliary slowing device
Assignee: Industrie Magneti Marelli SRL
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Filing: 1987-10-27
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Granted: 1989-04-11
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Expires: 2007-10-27
Abstract
Abstract The distributor comprises a body in which a movable brake-operating pusher is mounted for movement as a result of the actuation of the brake pedal. The position of the operating pusher relative to the distributor body is detected by means of a linear potentiometer having a casing fitted into the distributor body and a slide provided with a control pusher adapted to cause the displacement of the slide as a result of the movement of the operating pusher.
Inventors
- 👤 Domenico Angelillo
- 👤 Antonio Riversa
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 10:11
CPC Classifications
B; B60; B60T; B60T15/00; B60T15/02; B60T15/04; B60T15/14; B60T15/043; B60T15/045; B60T15/046
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
159 words
A control duplex-type pneumatic distributor for controlling a pneumatic braking system for a motor vehicle fitted with an auxiliary slowing device, comprising a body in which a movable brake valve operating pusher is mounted for movement as a result of the actuation of a brake pedal, and electrical sensor means for detecting the position of said operating pusher relative to the body, said electrical sensor means including a linear potentiometer including a casing fitted in said body and a control pusher which is movable through an opening in said casing for controlling the operation of the potentiometer as a result of movement of the control pusher, so that the operation of the potentiometer depends on the position of the operating pusher relative to the distributor body, and mechanical regulating means provided in said body and associated with said casing for enabling the resistance of the potentiometer to be calibrated in correspondence with a reference position of the operating pusher.
Claim 2
Dependent Claim
159 words
A control duplex-type pneumatic distributor for controlling a pneumatic braking system for a motor vehicle fitted with an auxiliary slowing device, comprising a body in which a movable brake valve operating pusher is mounted for movement as a result of the actuation of a brake pedal, and electrical sensor means for detecting the position of said operating pusher relative to the body, said electrical sensor means including a linear potentiometer including a casing fitted in said body and a control pusher which is movable through an opening in said casing for controlling the operation of the potentiometer as a result of movement of the control pusher, so that the operation of the potentiometer depends on the position of the operating pusher relative to the distributor body, and mechanical regulating means provided in said body and associated with said casing for enabling the resistance of the potentiometer to be calibrated in correspondence with a reference position of the operating pusher.
Claim 3
Dependent Claim
20 words
A distributor in accordance with claim 1, wherein the potentiometer is located in the distributor body above said operating pusher.
Claim 4
Dependent Claim
21 words
A distributor in accordance with claim 2, wherein said control pusher of the potentiometer is resiliently biased against the operating pusher.
Claim 5
Dependent Claim
28 words
A distributor in accordance with claim 1, wherein the casing of the potentiometer is mounted in the body of the distributor in a position which can be regulated.
Claim 6
Dependent Claim
71 words
A distributor in accordance with claim 4, wherein the casing of the potentiometer is located with axial play in a seat in the body of the distributor; resilient means being provided to urge the casing of the potentiometer against an upper wall of the seat; stop means being provided in an axially-adjustable position in said upper wall so as to locate the casing of the potentiometer in a correspondingly-adjustable axial position.
Claim 7
Dependent Claim
27 words
A distributor in accordance with claim 5, wherein said stop means comprise a grub screw screwed into a correspondingly-threaded hole in said upper wall of said seat.
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) | 1992-04-10 | 1992-10-10 | 1993-04-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-04-10 | 1996-10-10 | 1997-04-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-04-10 | 2000-10-10 | 2001-04-11 | $7700.00 | Window Closed / Lapsed |