Poppet valve and method of assembling same
AssigneeDayco Corporation
InventorPaul P. Frisch
Life of this patent
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Abstract
A poppet valve and method of assembling same are provided wherein such valve has an angled fluid flow passage extending through its valve body and has an improved closure for such passage comprising an annular sealing structure fixed to the valve body in sealed relation adjacent the discharge end of the flow passage with the sealing structure having an annular sealing edge at its inner end which is disposed in a plane perpendicular to an axis through such discharge end and a self-centering assembly comprising a disc having a yieldable planar portion which is adapted to engage the sealing edge of the sealing structure and provide a fluid-tight seal.
Claims21
In a poppet valve including a valve body defining an internal chamber and having inlet and outlet passages communicating with said chamber, and closure means disposed within said chamber and adapted to close a selected one of said inlet and outlet passages;
- the improvement wherein said closure means comprises, in combination, means defining an annular sealing edge circumferentially of said selected one of said inlet and outlet passages so that said sealing edge lies in a plane substantially perpendicular to the axis of said selected passage, a valve disc having an annular portion adapted to engage said annular sealing edge in fluid-tight sealing relation therewith, a backup plate fixed generally concentrically to said disc and defining a bearing surface generally centrally thereon, a spring plate defining a domed surface thereon, means supporting said spring plate internally of said chamber so as to lie in a plane substantially perpendicular to said axis of said selected passage in generally coaxial relation with said backup plate, and means cooperative with said backup plate and said spring plate for biasing them toward each other so that said domed surface engages said bearing surface in a manner to enable relative movement between said backup plate and said spring plate while maintaining relatively fixed rotational relation therebetween, said spring plate support means including means operative to move said backup plate and spring plate between a first position wherein said valve disc is spaced from said sealing edge to enable flow through said selected passage and a second position wherein said annular portion of said valve disc engages said sealing edge in fluid-tight sealing relation therewith.
A poppet valve comprising, in combination, a valve body defining an internal chamber and having inlet and outlet passages communicating with said chamber, at least one of said inlet and outlet passages having an annular sealing edge disposed circumferentially thereof with said sealing edge disposed in a plane substantially perpendicular to the axis of said at least one of said passages, a valve disc having a yieldable substantially planar annular sealing edge adapted for fluid-tight engagement with said sealing edge, a backup plate fixed generally concentrically to said valve disc and sized so as not to engage said annular yieldable portion of said valve disc, a plurality of spring support members fixed to said backup plate on a common circumference, a generally planar spring plate, means supporting said spring plate internally of said chamber so as to lie in a plane substantially perpendicular to said axis of said at least one passage in generally coaxially relation with said backup plate, said spring plate having a plurality of openings therein each of which receives a corresponding one of said spring support members therethrough, a spring cooperative with each of said support members in a manner to urge said backup plate toward said spring plate, said spring plate support means including means enabling movement of said backup plate and spring plate between a first position spaced from said sealing edge to enable flow through said one of said passages and a second position wherein said annular portion of said disc engages said sealing edge in fluid-tight relation therewith, and mutually cooperable surface means interposed between said spring plate and said backup plate to enable relative movement therebetween so that said yieldable annular portion of said valve disc engages the full circumference of said annular sealing edge in the event that said annular portion of said valve disc approaches said annular sealing edge in a skewed manner.
A method of assembling a poppet valve which includes a valve body defining an internal chamber and having inlet and outlet passages communicating with said chamber, said method comprising the steps of inserting means within said chamber to define an annular sealing edge circumferentially of a selected one of said inlet and outlet passages so that said sealing edge lies in a plane substantially perpendicular to the axis of said selected passage, fixing a backup plate generally concentrically to a valve disc so as to establish an annular sealing edge on said disc of a size sufficient to engage said annular sealing edge, said backup plate defining a bearing surface generally centrally thereon, interconnecting said backup plate to a spring plate, said spring plate defining a domed surface thereon and being interconnected to said backup plate in a manner to bias said domed surface against said bearing surface and enable relative movement between said backup plate and said spring plate while maintaining relatively fixed rotational relation therebetween, and mounting said valve disc, backup plate and interconnected spring plate within said chamber so that said spring plate is movable between a first position wherein said valve disc is spaced from said sealing edge to enable flow through said selected passage and a second position wherein said annular portion of said valve disc engages said sealing edge in fluid-tight sealing relation therewith.
Dependencies are inferred from the claim text.