SILENT HOSE COUPLING
First Claim
1. A coupling for connecting a hose to a source of fluid at a presSure different from atmospheric pressure comprising an outlet having a hollow housing with a circular opening at one end and a peripheral wall having a port connected to said source of fluid, a valve in said housing which closely fits the peripheral wall thereof and having a passageway therein forming ports at the open end of said housing and at its periphery, respectively, a nipple at the end of the hose adapted to seat in sealing engagement with the port in said valve at the open end of the housing, a groove in the peripheral wall of the housing having an axially extending portion and a radially extending portion, a keyway in the outer peripheral wall of said valve, a key mounted to slide in said keyway in said valve, a detent projecting outwardly from the key into said groove in the peripheral wall of said housing and engaging the axially extending portion thereof, and a pin projecting radially from the nipple for engaging the key and moving it along the valve until the detent aligns with the radial portion of said groove whereby to permit the valve to be turned to connect its passageway with the port in the housing only after the nozzle has been seated in the valve to prevent air noise resulting from leakage between the parts.
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Accused Products
Abstract
The disclosure is directed to a coupling which eliminates air noise when connecting and disconnecting a detachable cleaning hose to a built-in vacuum-cleaning system for buildings having outlets in separate rooms in which a nipple at the end of the hose is moved into sealing engagement with a valve plug in an outlet and then turned to connect the hose to an exhauster through built-in piping, and an interlocking arrangement to prevent rotation of the valve plug except when the hose nipple is in sealing engagement therewith.
25 Citations
7 Claims
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1. A coupling for connecting a hose to a source of fluid at a presSure different from atmospheric pressure comprising an outlet having a hollow housing with a circular opening at one end and a peripheral wall having a port connected to said source of fluid, a valve in said housing which closely fits the peripheral wall thereof and having a passageway therein forming ports at the open end of said housing and at its periphery, respectively, a nipple at the end of the hose adapted to seat in sealing engagement with the port in said valve at the open end of the housing, a groove in the peripheral wall of the housing having an axially extending portion and a radially extending portion, a keyway in the outer peripheral wall of said valve, a key mounted to slide in said keyway in said valve, a detent projecting outwardly from the key into said groove in the peripheral wall of said housing and engaging the axially extending portion thereof, and a pin projecting radially from the nipple for engaging the key and moving it along the valve until the detent aligns with the radial portion of said groove whereby to permit the valve to be turned to connect its passageway with the port in the housing only after the nozzle has been seated in the valve to prevent air noise resulting from leakage between the parts.
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2. In a vacuum-cleaning system of the type having a central exhauster connected to piping extending to different areas of a building and having outlets for connection to a detachable cleaning hose and in which each outlet comprises a housing having a cylindrical wall with a port connected to the piping, a cylindrical valve plug in the housing having a passageway therein forming port openings at one end and in its periphery, respectively, and a nipple at the end of a detachable hose adapted to be moved into the port opening in the end of the valve, that improvement comprising an interlocking means between the valve plug and housing to prevent rotation of the valve plug when the cleaning hose is detached, said valve and nipple on the hose providing a seal when the nipple is inserted in the valve, and means on the nipple engaging and releasing the interlocking means when the nipple is moved into sealing engagement with the valve to permit the valve to be turned to connect the hose to the exhauster through the piping.
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3. A coupling for connecting a cleaning hose to a built-in vacuum-cleaning system for buildings having separate rooms and piping in the walls of each room, an outlet from the piping in at least one wall of each room comprising a housing having a cylindrical wall with an outlet port connected to the piping of the vacuum system, a cylindrical valve plug rotatable in said housing and having a passageway therein forming a port at its periphery and at one end thereof, end plates at the ends of the housing and valve plug, a keyway extending longitudinally in the periphery of the valve plug, a key slidable in the keyway and having at least one detent projecting from the key, a groove in the wall of the housing having longitudinal and radial sections, a slot underlying the keyway adjacent the end of the valve plug, a spring acting on one end of the key to yieldingly hold the detent in the longitudinal section of the groove to prevent rotation of the valve plug, at least one end plate having a circular hole in alignment with the port opening in the end of the valve and a notch at one side thereof, a detachable hose having a nipple at one end adapted for insertion through the hole in the end plate to seat in the port opening in the end of the valve plug, and a pin projecting from the nipple for movement through the notch in the side of the end plate and a slot in the end of the valve plug to move the key and detent along the longitudinal portion of the slot in the housing until the nipple is seated in the valve port and the detent is aligned with the radial portion of the slot so that the valve may be turned by the pin and nipple to align the port in the valve plug in communication with the outlet port in the housing wall.
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4. A coupling for detacHably connecting a cleaning hose to a vacuum-cleaning system for buildings in accordance with claim 3 in which each outlet comprises a fitting in the piping system.
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5. A coupling for detachably connecting a cleaning hose to a vacuum-cleaning system in accordance with claim 3 in which each outlet projects from the piping through an opening in the wall, and a movable cover plate on the wall overlying the outlet and open end of the valve.
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6. A coupling for detachably connecting a cleaning hose to a vacuum-cleaning system for buildings in accordance with claim 3 in which the piping system comprises connecting piping sections in the walls of the building, each outlet housing extending to opposite sides of the wall into adjacent rooms, said valve plug having separate passageways with each having a port at its periphery and a port at one of the ends of the valve plug, respectively, said keyway extending longitudinally of the valve plug throughout its length, keys in the keyway with each having a detent projecting radially therefrom, and separate grooves in the housing into which the detents project for controlling rotation of the valve plug in opposite directions.
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7. A coupling in accordance with claim 6 in which the separate grooves each has a longitudinal section and a radial section, and said spring acting between adjacent inner ends of the keys to hold them separated in interlocked relation with the longitudinal sections of the respective grooves to prevent rotation of the valve plug until one of the keys is moved along the valve plug into alignment with a radial section of its slot whereby to permit rotation of the valve plug only when a hose nipple is inserted into the outlet.
Specification