Hand operated low pressure valve

Claim 2

A valve comprising: a housing member defining an inlet passageway, a valve chamber and an outlet passageway for conveyance of a fluid under pressure therethrough; a main valve seat in said valve chamber; a valve assembly reciprocatably guided within said valve chamber; a main valve member included in a said valve assembly adapted to register with said main valve seat in the direction of flow of said fluid; said main valve member having a valve seat opening therethrough; a pair of spaced guide members attached to said main valve member; valve actuating means extending to said valve chamber in sliding relationship with said guide members with one portion thereof operable for engagement external of said housing for reciprocatable movement axially within said valve chamber in a direction against the flow of said fluid; a secondary valve member carried by said valve actuating means in operable relationship with said valve opening of said main valve member; and connecting means between said valve actuating means and said valve assembly said connecting means providing a stop member affixed to said actuating means retaining said valve assembly in one position against the pressure of said fluid with said main valve member exerting a closing force against said main valve seat while second secondary valve member is open; and providing a second position wherein said stop member retains said valve assembly with both said main valve member and said secondary valve member in open relationship with their respective valve seats.

Claim 3

A valve in accordance with claim 1 in which: said main valve seat includes an annular resilient seal member presenting an inwardly directed circumferential flexible flange portion extending toward incoming fluid and engaged by the periphery of said main valve member to effect the closure of said valve.

Claim 4

A valve in accordance with claim 2 in which: the periphery of said main valve member defines a tapered outer surface with a radial flange larger than the internal diameter of said flexible flange portion of said valve seat.

Claim 5

A valve in accordance with claim 1 in which: said valve chamber is provided with a guide chamber encompassing one of said guide members; and said guide chamber is in open communication with said inlet passageway.

Claim 6

A valve in accordance with claim 4 in which: said one guide member comprises a disc; radially spaced elongated supports are provided between said main valve member and said disc whereby fluid access is provided about said valve assembly exerting a constant closing pressure on said valve members.

Claim 7

A valve in accordance with claim 1 in which: said valve chamber has an open end through said housing and is defined by a surface of revolution tapering from said open end and intersecting said outlet and inlet passageways; said main valve seat comprises a separable valve seat member seated in said tapered valve chamber and having an end wall defining said main valve seat peripherally between said outlet and inlet passageways; an opening with said valve seat member communicating from said inlet passageway to said outlet passageway; said valve seat member having a base wall facing and spaced inwardly from said open end of said valve chamber with a central guide opening for said actuating means; closure means within said open end sealing against said base wall; and an annular resilient seal member against said end wall presenting an ouTer circumferential flexible flange portion circumferentially sealing the periphery of said valve seat member with said valve chamber; and presenting an inner circumferential flexible flange portion about said opening therein for engagement with said main valve member.

Claim 8

A valve in accordance with claim 1 in which: said secondary valve member comprises a spool valve with spaced radial flanges and having an O-ring seal between and spaced from said flanges; the valve seat opening in said main valve member is elongated and has a flared rounded edge facing said spool valve; and the peripheral diameter of the O-ring is greater than said flanges and greater than the internal diameter of the elongated portion of said valve seat opening.

Claim 9

A low pressure self-closing hand-operated valve comprising: a housing member defining an elongate frusto-conical valve chamber, a handle section and a nozzle section; said valve chamber having a substantially uniform taper with an open end at the portion of larger diameter and a closed end at the portion of smaller diameter; an outlet passageway communicating from said portion of larger diameter into said nozzle section; said handle section being tubular to define the inlet passageway for said valve and communicating with said valve chamber at a portion of intermediate diameter axially spaced from said outlet passageway and from said closed end; a guide chamber defined within the portion of said valve chamber having the lesser diameter; a tapered plug member adapted to fit within that portion of said valve chamber of greater diameter; intersecting bores in said plug member; one of said bores being axially aligned with said valve chamber and presenting a transverse wall facing and spaced from the open end of said valve chamber, with a circumferential retaining edge oriented between said portions of greater and intermediate diameters of said valve chamber; the other of said bores registering with said outlet passageway; a valve stem slidably supported by said transverse wall having a finger knob at the end outside said housing with the other end extending axially within said guide chamber and spaced from the closed end thereof; means sealing the transverse wall of said plug member within said valve chamber and about said valve stem; an annular resilient valve seat member adjacent said retaining edge of said plug member; said valve seat member having a pair of outwardly flared flanges disposed on the side opposite said retaining edge with the outermost flange engaging said valve chamber and the inner flange defining a resilient valve seat; a main valve having an outer tapered surface adapted to nest within said resilient valve seat and having a tapered center bore encompassing and spaced from said valve stem; axial support means extending from said main valve through said portion of said valve chamber having an intermediate diameter; inner and outer spaced radial support means affixed between said axial support means and slidably engaging said valve stem at its extended end, the outermost thereof being slidably retained within said guide chamber; a stop member affixed to said valve stem between said radial support means and adapted to alternately engage said support means upon reciprocation of said valve stem; a pilot valve member carried by said valve stem and adapted to be moved to and from a sealed position within the center bore of said main valve within the limits of reciprocation of said stop member between said radial support means as the initial opening position of said valve; and said valve stem stop member and radial support being movable into said guide chamber to thereby open said main valve against the flow of fluid from said inlet passageway as the final opening position of said valve with said inner radial support means and both of said valve member being subject to a closing force by said fluid stream.

Claim 10

A low pressure self-closing hand-operated valve comprising: a housing member defining an elongate frusto-conical valve chamber, a handle section and a nozzle section; said valve chamber having a substantially uniform taper with an open end at the portion of larger diameter and a closed end at the portion of smaller diameter; an outlet passageway communicating from said portion of larger diameter into said nozzle section; said handle section being tubular to define the inlet passageway for said valve and communicating with said valve chamber at a portion of intermediate diameter axially spaced from said outlet passageway and from said closed end; a guide chamber defined within the portion of said valve chamber having the lesser diameter; a tapered plug member adapted to fit within that portion of said valve chamber of greater diameter; intersecting bores in said plug member; one of said bores being axially aligned with said valve chamber and presenting a transverse wall facing and spaced from the open end of said valve chamber, with a circumferential retaining edge oriented between said portions of greater and intermediate diameters of said valve chamber; the other of said bores registering with said outlet passageway; a valve stem slidably supported by said transverse wall having a finger knob at the end outside said housing with the other end extending axially within said guide chamber and spaced from the closed end thereof; means sealing the transverse wall of said plug member within said valve chamber and about said valve stem; an annular resilient valve seat member adjacent said retaining edge of said plug member; said valve seat member having a pair of outwardly flared flanges disposed on the side opposite said retaining edge with the outermost flange engaging said valve chamber and the inner flange defining a resilient valve seat; a main valve having an outer tapered surface adapted to nest within said resilient valve seat and having a tapered center bore encompassing and spaced from said valve stem; axial support means extending from said main valve through said portion of said valve chamber having an intermediate diameter; inner and outer spaced radial support means affixed between said axial support means and slidably engaging said valve stem at its extended end, the outermost thereof being slidably retained within said guide chamber; a stop member affixed to said valve stem between said radial support means and adapted to alternately engage said support means upon reciprocation of said valve stem; a pilot valve member carried by said valve stem and adapted to be moved to and from a sealed position within the center bore of said main valve within the limits of reciprocation of said stop member between said radial support means as the initial opening position of said valve; and said valve stem stop member and radial support being movable into said guide chamber to thereby open said main valve against the flow of fluid from said inlet passageway as the final opening position of said valve with said inner radial support means and both of said valve member being subject to a closing force by said fluid stream.

Claim 11

A valve in accordance with claim 8 in which: said inner and outer radial support means comprises a pair of plate members affixed to and spaced along said axial supports; the outer of said plate members being in slidable relationship with said guide means and the inner of said plate members being within the inlet flow stream of said valve.

Claim 12

A valve in accordance with claim 8 in which: said pilot valve member includes a cylindrical body and a flange having an outside diameter greater than the smallest inner diameter of said pilot valve seat.

Claim 13

A valve in accordance with claim 10 in which said circumferential seal member is an O-ring and a second flange is provided on said cylindrical body spaced from first flange to retain said ''''O'''' ring thereon.

Claim 14

A valve in accordance with claim 8 in which: the open end of said valve chamber includes a closure member in sealed relationship therein and providing a central opening encompassing said valve actuating stem; said inlet and outlet passageways are radially disposed and longitudinally spaced on each side of said main valve seat; said valve chamber tapers from said outlet to said inlet passageway; and a tapered plug member is provided having an opening registering with said outlet passageway and includes an opening having a radial surface comprising said main valve seat.

Claim 15

A valve comprising: housing means defining a handle portion, an elongate valve chamber transverse to said handle portion and outlet passageway; an inlet passageway communicating with said valve chamber and spaced from said closed end; an outlet passageway communicating with said valve chamber and spaced from said open end; guide means in said valve chamber between said closed end and said inlet passageway; a circumferential valve seat in said valve chamber between said inlet and outlet passageways and facing said guide chamber; a valve actuating stem extending into said valve chamber and slidably carried between said open end and said guide means; a main valve member adapted to close upon said valve seat; said main valve member having an opening therethrough defining a pilot valve seat; a pilot valve member affixed to said valve actuating stem and adapted to close upon said pilot valve seat in said main valve member; lost motion connecting means between said valve actuating stem and said main including longitudinally spaced radial support means affixed to said main valve member; said support means providing guided reciprocable movement to and from said guide chamber and including a stop member affixed to said valve actuating stem between said support means; said stop member being movable between said support means during the opening of said pilot valve with said main valve closed and adapted to engage therewith after the opening of said pilot valve to open said main valve.

Claim 16

A valve comprising: housing means defining a handle portion, an elongate valve chamber transverse to said handle portion and outlet passageway; an inlet passageway communicating with said valve chamber and spaced from said closed end; an outlet passageway communicating with said valve chamber and spaced from said open end; guide means in said valve chamber between said closed end and said inlet passageway; a circumferential valve seat in said valve chamber between said inlet and outlet passageways and facing said guide chamber; a valve actuating stem extending into said valve chamber and slidably carried between said open end and said guide means; a main valve member adapted to close upon said valve seat; said main valve member having an opening therethrough defining a pilot valve seat; a pilot valve member affixed to said valve actuating stem and adapted to close upon said pilot valve seat in said main valve member; lost motion connecting means between said valve actuating stem and said main including longitudinally spaced radial support means affixed to said main valve member; said support means providing guided reciprocable movement to and from said guide chamber and including a stop member affixed to said valve actuating stem between said support means; said stop member being movable between said support means during the opening of said pilot valve with said main valve closed and adapted to engage therewith after the opening of said pilot valve to open said main valve.