Gear motor/mixer
First Claim
1. Gear motor apparatus for mixing a liquid under pressure with a gas under pressure, comprising,a body having a gear chamber,intermeshing gears mounted for rotation in said chamber, said gears having teeth which interengage in a meshing zone of said chamber,a gas inlet entering said chamber adjacent a first end of said meshing zone,an outlet communicating with said chamber adjacent a second end of said meshing zone,a liquid inlet entering said chamber at a position which is spaced downstream from said gas inlet and upstream from said outlet,there being no motor drive for rotating said gears,the gears being rotated by the pressures of the incoming fluids.
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Accused Products
Abstract
A gas/liquid mixer in which intermeshing gears are caused to rotate and establish mixing, by pressure of the fluids being mixed. The gears are mounted for rotation in a gear chamber and interengage in a meshing zone of the chamber. A gas is introduced into the chamber through a gas inlet which is adjacent to one end of the meshing zone. A liquid inlet enters the chamber between the gas inlet and an outlet which is positioned adjacent a second or opposite end of the mixing zone. The gears are rotated in the chamber by the introduction and expansion of the gas and liquid in the spaces between the gear teeth. Flow regulating means controls the gas/liquid ratio. The apparatus is useful, among other purposes, for mixing a soluble gas with molten hot melt adhesive, directly adjacent the nozzle of a dispenser for preparing a hot melt foam.
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Citations
25 Claims
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1. Gear motor apparatus for mixing a liquid under pressure with a gas under pressure, comprising,
a body having a gear chamber, intermeshing gears mounted for rotation in said chamber, said gears having teeth which interengage in a meshing zone of said chamber, a gas inlet entering said chamber adjacent a first end of said meshing zone, an outlet communicating with said chamber adjacent a second end of said meshing zone, a liquid inlet entering said chamber at a position which is spaced downstream from said gas inlet and upstream from said outlet, there being no motor drive for rotating said gears, the gears being rotated by the pressures of the incoming fluids.
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2. Apparatus for dispersing a gas in a liquid directly proximate to a dispensing nozzle, comprising,
a source of gas under pressure, a source of liquid, a gear motor/mixer comprising, a body having a gear chamber, intermeshing gears mounted for rotation in said chamber, said gears having teeth which interengage in a meshing zone of said chamber, a gas inlet entering said chamber adjacent a first end of said meshing zone, an outlet communicating with said chamber, adjacent a second end of said meshing zone, and a liquid inlet entering said chamber at a position which is downstream from said gas inlet and upstream from said outlet, said gears being rotated in said chamber by the expansion of such fluid in the spaces between the gear teeth, means mounting said motor/mixer adjacent to said nozzle, passages connecting said gas source and said liquid source with the gas and liquid inlets respectively of said motor/mixer, and a passage connecting the outlet of said motor/mixer to said nozzle.
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18. Apparatus for mixing two fluids under pressure comprising,
a pair of gear motors, each having an inlet and an outlet, means interconnecting a gear of each said motor with a gear of the other motor so that the pair of motors rotate in synchronism, means for supplying one of said two fluids under pressure to the inlet of one of said pair of motors, means for supplying the other of said two fluids under pressure to the inlet of the other of said pair of motors, a passage connecting the outlets of both said pair of motors to the inlet of a third gear motor, said third gear motor being rotated by pressure of said fluids acting on the gears thereof and mixing said fluids as they are delivered to the outlet thereof.
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19. Gear motor apparatus in which a gas and a liquid are intermixed by the action of meshing gears in a gear chamber and the mixture is delivered to an outlet port where the teeth of the gear come into mesh,
said gear motor having mixing means for improving the dispersion of the gas in the liquid, said mixing means comprising, a series of blind cavities formed in a surface which adjoins said chamber, said cavities opening to said chamber, said cavities being at spaced positions along the path of movement of the teeth of at least one of said gears such that the cavities are separated by gear teeth, the intertooth spaces of said gear alternately connecting to and disconnecting from the cavities in sequence as the gear rotates.
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25. Gear motor apparatus operated by pressure of incoming fluids, for mixing a liquid under pressure with a gas under pressure, comprising,
a body having a gear chamber, intermeshing gears mounted for rotation in said chamber, said gears having teeth which interengage in a meshing zone of said chamber, a gas inlet and a liquid inlet entering said chamber, and an outlet communicating with said chamber, said gears being rotated in said chamber by fluid expansion in the spaces between the gear teeth.
Specification