A liquid flow regulator has a housing formed by two parts that snap together. The housing defines an axial bore, an inlet, an outlet and a plurality of axial grooves opening endwise of the inlet and laterally of the housing into the bore. The grooves taper axially so that the cross-sectional area of
A liquid flow regulator has a housing formed by two parts that snap together. The housing defines an axial bore, an inlet, an outlet and a plurality of axial grooves opening endwise of the inlet and laterally of the housing into the bore. The grooves taper axially so that the cross-sectional area of each groove gradually decreases from the inlet to nothing at a pont where the groove merges with the bore. The grooves have different axial lengths. An elastomeric sock fits within the bore. Means for expanding the sock radially outward into sealing engagement with the housing adjacent the bore is axially movable within the bore. Flow through the grooves and the bore is regulated by the axial position of the sock expanding means and the minimum cross-sectional area of the tapered, axial grooves at the axial location where the sock seals the bore. Axial adjustment of the sock expanding means sequentially opens and closes passage from the grooves through the bore to the bore outlet. Means are provided for disabling the sock expanding means to limit withdrawal of the sock expanding means from the bore.
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1. A liquid flow regulator comprising: a housing having an axial bore, an inlet adjacent one end of the bore, an outlet at the opposite end of the bore, and at least one axial groove opening endwise into the inlet and laterally of the bore into the bore, said groove having at least one dimension
1. A liquid flow regulator comprising: a housing having an axial bore, an inlet adjacent one end of the bore, an outlet at the opposite end of the bore, and at least one axial groove opening endwise into the inlet and laterally of the bore into the bore, said groove having at least one dimension that tapers from the inlet to the bore so that the groove cross-sectional area gradually decreases to nothing where the groove merges into the bore; an elastomeric sock fitted within the bore; means movable axially of the bore within the sock for expanding the sock radially outward into sealing engagement with the housing adjacent the bore, whereby flow through the groove and the bore is regulated by the axial position of the sock expanding means and the minimum cross-sectional area of the tapered, axial groove at the axial location where the sock seals the bore, said sock expanding means including a bulb, a stem attached to the bulb including means threadedly fitting the stem through the housing so as to permit the bulb to be moved axially of the bore upon rotation thereof, and a knob for rotating the stem; and means for disabling the sock expanding means to limit withdrawal of the bulb from the bore. 2. The liquid flow regulator of claim 1 wherein said means for disabling the sock expanding means includes a pair of legs depending from the knob, a pair of lugs projecting laterally from the legs with one lug on each leg projecting towards the other leg, a pair of stops on the housing near the top portion thereof for engaging the lugs when the stem is rotated in one direction and a pair of cam surfaces on the housing extending from the stops to the outer periphery of the housing for camming the lugs radially outward upon rotation of the stem in the opposite direction. 3. A liquid flow regulator comprising: a housing having an axial bore, an inlet adjacent one end of the bore, an outlet at the opposite end of the bore, and at least one axial groove opening endwise into the inlet and laterally of the bore into the bore, said groove having at least one dimension that tapers from the inlet to the bore so that the groove cross-sectional area gradually decreases to nothing where the groove merges into the bore; an elastomeric sock fitted within the bore; and means movable axially of the bore within the sock for expanding the sock radially outward into sealing engagement with the housing adjacent the bore, whereby flow through the groove and the bore is regulated by the axial position of the sock expanding means and the minimum cross-sectional area of the tapered, axial groove at the axial location where the sock seals the bore, said sock expanding means including a bulb, a stem attached to the bulb including means threadedly fitting the stem through the housing so as to permit the bulb to be moved axially of the bore upon rotation thereof, and a knob for rotating the stem, said bulb and stem having a vent extending from the bottom of the bulb to a location laterally of the stem to provide pressure relief when the bulb moves axially downward into the sock. 4. A liquid flow regulator comprising: a housing having an axial bore, an inlet adjacent one end of the bore, an outlet at the opposite end of the bore, and at least one axial groove opening endwise into the inlet and laterally of the bore into the bore, said groove having at least one dimension that tapers from the inlet to the bore so that the groove cross-sectional area gradually decreases to nothing where the groove merges into the bore; an elastomeric sock fitted within the bore; means movable axially of the bore within the sock for expanding the sock radially outward into sealing engagement with the housing adjacent the bore, whereby flow through the groove and the bore is regulated by the axial position of the sock expanding means and the minimum cross-sectional area of the tapered, axial groove at the axial location where the sock seals the bore; and said housing being made of two parts that snap together locking the elastomeric sock in place within the bore. 5. A liquid flow regulator comprising: a housing having an axial bore, an inlet adjacent one end of the bore, an outlet at the opposite end of the bore, and at least one axial groove opening endwise into the inlet and laterally of the bore into the bore, said groove having at least one dimension that tapers from the inlet to the bore so that the groove cross-sectional area gradually decreases to nothing where the groove merges into the bore; an elastomeric sock fitted within the bore; means movable axially of the bore within the sock for expanding the sock radially outward into sealing engagement with the housing adjacent the bore, whereby flow through the groove and the bore is regulated by the axial position of the sock expanding means and the minimum cross-sectional area of the tapered, axial groove at the axial location where the sock seals the bore; and said housing having a plurality of ribs projecting upwardly from the bottom of the bore and extending from the sides of the bore to the bore outlet for supporting the elastomeric sock above the bottom of the bore.
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