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Engine air intake shut-off valve

  • US 4,501,238 A
  • Filed: 05/03/1983
  • Issued: 02/26/1985
  • Est. Priority Date: 05/03/1983
  • Status: Expired due to Fees
First Claim
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1. A shut-off valve for restricting air flow to or from an engine comprising:

  • a. a housing defining a cavity therein, the cavity comprising an upper portion and a lower portion;

    b. an air passage extending through the housing and being alignable with an engine air intake line, the air passage comprising axially aligned first and second ports extending through opposed sides of the housing and also comprising the lower portion of the cavity intermediate the first and second ports;

    c. a first seating surface extending around the periphery of the first port and comprising a portion of an interior surface of the housing;

    d. a second seating surface extending around the periphery of the second port and comprising a portion of an interior surface of the housing;

    e. a gate member residing in the cavity, the gate member being reciprocable in the cavity in a direction perpendicular to the aligned axes of the first and second ports from an open position in the upper portion of the cavity to a closed position intermediate the first and second ports in the lower portion of the cavity, the gate member having a dimension along the axis of the air passage smaller than the axial distance between the first and second seating surfaces, the gate member being seatable directly against the first or second seating surface;

    f. means for reciprocating the gate member into and maintaining the gate member in the open or closed position; and

    g. means for connecting the gate member to the reciprocating and maintaining means permitting the gate member freedom of movement relative to the reciprocating and maintaining means and along the axis of the air passage to the extent of the distance between the first and second seating surfaces.

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