Pressure regulating valve
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United States of America Patent
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Feb 13, 2007
Grant Date -
Nov 10, 2005
app pub date -
Apr 12, 2005
filing date -
May 6, 2004
priority date (Note) -
Expired
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Abstract
Known pressure regulating valves have a valve closing body, which cooperates with a valve seat, and a restoring spring, which acts on a valve closing body in the direction facing away from the valve seat. It is disadvantageous that the restoring spring is disposed in a pressure chamber, which has the valve seat and through which aggressive blowby gases flow out of the crankcase. The blowby gases for instance have a corrosive, etching effect on the material of the restoring spring, shortening the service life and lessening the spring force of the restoring spring. This has a highly adverse effect on the regulation of the pressure in the crankcase. In the pressure regulating valve of the invention, the service life of the restoring spring is increased. According to the invention, the restoring spring (31) is embodied as a tension spring and is located on the side of the valve closing body (15) facing away from the valve seat (12).
First Claim
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- 15 United States
- 10 France
- 8 Japan
- 7 China
- 5 Korea
- 2 Other
Patent Owner(s)
- ROBERT BOSCH GMBH
International Classification(s)
Inventor(s)
Inventor Name | Address | # of filed Patents | Total Citations |
---|---|---|---|
Christen, Markus | Bochum, DE | 3 | 16 |
Hezel, Bruno | Stuttgart, DE | 10 | 101 |
Ulrich, Markus | Rudersberg, DE | 15 | 345 |
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Fee | Large entity fee | small entity fee | micro entity fee | due date |
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Fee | Large entity fee | small entity fee | micro entity fee |
---|---|---|---|
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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