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Reaction mechanism for booster

  • US 6,003,426 A
  • Filed: 05/21/1997
  • Issued: 12/21/1999
  • Est. Priority Date: 05/31/1996
  • Status: Expired due to Fees
First Claim
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1. In a booster including a valve body slidably disposed within a shell, a power piston mounted in the valve body, a constant pressure chamber and a variable pressure chamber defined across the power piston, a valve mechanism disposed in the valve body, an input shaft for driving a valve plunger, which forms at least a part of the valve mechanism, back and forth to switch a flow path in the valve mechanism, and an output shaft driven forward as the valve body is driven forward;

  • a reaction mechanism for booster comprising a pseudoreaction imparting means which prevents a reaction applied to the output shaft from being transmitted to the valve plunger when the booster is operative and which imparts a pseudo-reaction which depends on a travel of the input shaft, andin which the pseudo-reaction imparting means comprises an elastic member which is disposed in the constant pressure chamber for urging the valve plunger rearward.

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