Patent USRE26237E successfully refreshed from Google Patents.
Patent US2452032A successfully refreshed from Google Patents.
Patent US3768598A successfully refreshed from Google Patents.
US3768598A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Signal indicator for railway vehicles having disc brakes
Assignee: Knorr Bremse GmbH
•
Filing: 1972-04-04
•
Granted: 1973-10-30
•
Expires: 1992-04-04
Abstract
Abstract A railway vehicle having disc brakes is provided with an indicator which generates a signal when a predetermined wear occurs in a brake lining. A pressurized circuit including an indicator for generating a signal is connected to a housing centrally located at the periphery of the brake disc. The housing has control valves therein which control connection of the signal indicator with the atmosphere and with a source of pressure. The valves are actuated by sensor links pivotally connected to the housing and to brake lining holders so that upon the occurrence of a predetermined wear in a brake lining the sensor links engage actuation stems on the valves and cause the valves to disconnect the signal indicator from the source of pressure and connect the signal indicator to the atmosphere whereby a signal is generated.
Inventors
- 👤 H Pollinger
- 👤 E Blaut
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 13:49
CPC Classifications
F; F16; F16D; F16D66/00; F16D66/02
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
238 words
In an indicator which generates a signal when predetermined wear occurs in the brake lining of disc brakes in a vehicle, the combination of a control valve comprising a pair of valves with valve members therein moveable in opposite directions and a compression spring therebetween, a pair of holders mounted on said vehicle and supporting brake linings on opposed sides of a brake disc, actuation stems on said valve members extending outwardly of said control valve in opposite directions, first means on said control valve for connecting to a source of pressure and second means thereon for connecting to a signal indicator, said control valve having a first opening to the atmosphere associated with said first connection means and a second opening to the atmosphere associated with said second connection means, said first and second connecting means and said first and second openings defining a pressurized circuit interconnecting said valve and a signal indicator, said valves controlling said first and second connecting means and said first and second openings so that actuation of at least one valve disconnects said second means from said source of pressure and connects said second means to the atmosphere, and sensor device means engageable with said valve actuation stems and actuated by a said holder when predetermined brake lining wear occurs for actuating said valves to vary the state of pressure in said circuit whereby a signal is generated by the signal indicator.
Claim 2
Dependent Claim
238 words
In an indicator which generates a signal when predetermined wear occurs in the brake lining of disc brakes in a vehicle, the combination of a control valve comprising a pair of valves with valve members therein moveable in opposite directions and a compression spring therebetween, a pair of holders mounted on said vehicle and supporting brake linings on opposed sides of a brake disc, actuation stems on said valve members extending outwardly of said control valve in opposite directions, first means on said control valve for connecting to a source of pressure and second means thereon for connecting to a signal indicator, said control valve having a first opening to the atmosphere associated with said first connection means and a second opening to the atmosphere associated with said second connection means, said first and second connecting means and said first and second openings defining a pressurized circuit interconnecting said valve and a signal indicator, said valves controlling said first and second connecting means and said first and second openings so that actuation of at least one valve disconnects said second means from said source of pressure and connects said second means to the atmosphere, and sensor device means engageable with said valve actuation stems and actuated by a said holder when predetermined brake lining wear occurs for actuating said valves to vary the state of pressure in said circuit whereby a signal is generated by the signal indicator.
Claim 3
Dependent Claim
50 words
In an indicator as claimed in claim 1 and a housing at the periphery of the brake disc and said pair of valves being in said housing, passage means in said housing connecting said fIrst opening to said second opening, and a signal indicator connected to said second connecting means.
Claim 4
Dependent Claim
36 words
In an indicator as claimed in claim 1 and comprising a housing at the periphery of the brake disc and mounted on said vehicle in a position centrally located at the periphery of the brake disc.
Claim 5
Dependent Claim
41 words
In an indicator as claimed in claim 1 wherein said sensor device means comprises links pivotally mounted on each side of said control valve and pivotally connected to said brake lining holders, said links being engageable with said valve actuation stems.
Claim 6
Dependent Claim
28 words
In an indicator as claimed in claim 4 wherein said links are spaced from their respective actuation stems a predetermined distance when said brake linings are not worn.
Claim 7
Dependent Claim
19 words
In an indicator as claimed in claim 1 wherein said valves are connected in series with said signal indicator.
Claim 8
Dependent Claim
15 words
In an indicator as claimed in claim 1 wherein said vehicle is a railway vehicle.
Claim 9
Dependent Claim
74 words
In an indicator as claimed in claim 7 and comprising a plurality of said brake discs and a corresponding plurality of said housings and associated pairs of valves and brake lining holders mounted on a bogie of the railway vehicle, a pair of signal indicators connected in parallel with said indicators being associated respectively with both sides of said bogie, said plurality of pairs of valves being connected in series with said signal indicators.
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) | 1976-10-29 | 1977-04-30 | 1977-10-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-10-29 | 1981-04-30 | 1981-10-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-10-29 | 1985-04-30 | 1985-10-30 | $7700.00 | Window Closed / Lapsed |