Combined service brake and spring type brake cylinder having internal ventilation
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United States of America Patent
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Dec 7, 2010
Issued Date -
N/A
app pub date -
Jul 27, 2006
filing date -
Jul 27, 2005
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Abstract
A combined service brake and spring brake cylinder has a diaphragm arranged in a housing of the service brake cylinder. At one side, the diaphragm delimits a service brake chamber acted on with a service brake pressure, and at the other side delimits a chamber accommodating a return spring. A spring brake piston is arranged in a housing of the spring brake cylinder, which at one side delimits a spring brake chamber and at the other side delimits a spring chamber. A piston rod supports a ventilation valve which produces or blocks a flow connection between the spring chamber and the service brake chamber. The ventilation valve includes a piston interacting with a valve seat. At least one further piston interacts with a further valve seat and opens at least one further flow cross-section when in its position raised from the further valve seat. When the parking brake is applied and the service brake is simultaneously actuated with service brake pressures lower than a pressure threshold, one piston is raised from the valve seat and the further piston is sealed against the further valve seat.
First Claim
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- 15 United States
- 10 France
- 8 Japan
- 7 China
- 5 Korea
- 2 Other
Patent Owner(s)
- KNORR-BREMSE SYSTEME FUER NUTZFAHRZEUGE GMBH
International Classification(s)
Inventor(s)
Inventor Name | Address | # of filed Patents | Total Citations |
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Le, Mer Sebastian | Auquainville, FR | 1 | 7 |
Schodrowski, Antony | Lisieux, FR | 2 | 16 |
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Fee | Large entity fee | small entity fee | micro entity fee |
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Surcharge after expiration - Late payment is unavoidable | $700.00 | $350.00 | $175.00 |
Surcharge after expiration - Late payment is unintentional | $1,640.00 | $820.00 | $410.00 |
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