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Valve over-travel mechanism

  • US 10,024,439 B2
  • Filed: 07/24/2015
  • Issued: 07/17/2018
  • Est. Priority Date: 12/16/2013
  • Status: Active Grant
First Claim
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1. A valve mechanism comprising:

  • a valve body;

    a valve stem situated in the valve body and moveable in first and second directions of a longitude dimension of the valve stem;

    a main plate attached to the valve stem with the valve stem perpendicular to the main plate, wherein the main plate has a first surface and a second surface;

    an over-travel spring having a first end attached to the second surface of the main plate;

    a valve seal structure having a first surface attached to a second end of the over-travel spring, with the valve stem perpendicular to the first surface of the valve seal structure; and

    a single valve seat attached to a rigid support of the valve body, facing a second surface of the valve seal structure; and

    wherein moving the valve stem in the first direction of the longitudinal dimension of the valve stem results in movement of the main plate pushing the over-travel spring and in turn pushing the valve seal structure towards the single valve seat to reduce or stop a flow of a fluid between the valve seal structure and the single valve seat,further comprising one or more additional valve seals situated in the second surface of the valve seal structure for coming in contact with the single valve seat to reduce or stop a flow of the fluid between the one or more additional valve seals and the single valve seat,wherein a contact of a first seal of the one or more seals with the single valve seat can reduce the flow of the fluid between the first seal and the single valve seat to X cubic feet per hour (CFH); and

    a contact of a second seal of the one or more seals with the single valve seat can reduce the flow of the fluid between the first seal and the single valve seat to Y CFH; and

    X>

    Y.

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