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Device and method to control and/or regulate a pressure level

  • US 7,156,467 B2
  • Filed: 09/24/2004
  • Issued: 01/02/2007
  • Est. Priority Date: 09/25/2003
  • Status: Expired due to Fees
First Claim
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1. A device for controlling and/or regulating the pressure level of at least one volume variable recipient of a motor vehicle seat pneumatic system having a static admission pressure, the device comprising a closed system communicating with the recipient so that the closed system and the recipient contain a working fluid, the closed system including a volume adjusting element adjusted to a defined zero setting, the volume adjusting element operably increasing or reducing the pressure in the recipient in a reversible manner by selectively decreasing and increasing the volume of the closed system, the system having an inlet with a pump that feeds a corresponding quantity of working fluid to the volume adjusting element and achieving initial static pressurization of the working fluid prior to active dynamic pressurization of the system, the dynamic pressurization increased or decreased with no losses in working fluid and the pump no longer feeding any working fluid to the recipient.

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