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US 4,395,919 AGranted
Flow rate meter
AssigneeNevamo Inc.
InventorPaulus J. Peters
Life of this patent
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AssigneeNevamo Inc.
InventorPaulus J. Peters
Estimating the term…
A fluid flow rate meter, in particular a liquid flow rate meter, such as a fuel consumption meter for a motor vehicle. The meter comprises a housing to be mounted in a conduit. The housing has an axial passageway, and a liquid directing member in the form of an insert fills up the passage opening, which insert has at least one helical channel along its circumference. A rotor has a central shaft journalled with limited axial clearance on the downstream side of said insert in a cavity provided for the purpose in the downstream end face of said insert, and in a similar cavity in a counter-bearing. The counter-bearing comprises a central portion containing said cavity and is connected through radial sheet members to the wall of said passageway. A device is provided for sensing rotor revolutions and converting these into a signal representation of the fluid flow rate.
A fluid flow rate meter comprising:
A fluid flow rate meter comprising a housing to be mounted in a conduit, said housing having an axial passageway, a liquid directing member in the form of an insert filling up the passageway opening, said insert having at least one helical channel along its circumference, a rotor journalled on the downstream side of said insert, said rotor having an axis of rotation oriented in the direction of the axis of said passageway, and vane members extending in spaced parallel position to the axis of the rotor and comprising means for sensing rotor revolutions and for converting these into a signal representative of the fluid flow rate, the rotor having a central shaft whose upstream end is journalled in a cavity in the downstream end face of said insert, and whose downstream end is journalled in a cavity in a counter-bearing, said counter-bearing comprising a central portion containing said cavity and being connected through radial sheet members to the wall of said passageway, the rotor being journalled with limited axial clearance, the insert being provided with two helical circumferential channels, each extending at a steep angle to the axis for approximately 180.degree. and beginning and terminating diametrically opposite each other, the counter-bearing being formed as a flat strip extending transversely through the fluid passageway.
A fluid flow rate meter comprising a housing having an axial passageway therein and a stop shoulder protruding inwardly from a wall of said passageway, a fluid directing member in the form of an insert having two helical circumferential channels therein positioned in said passageway in contact with said stop shoulder, each channel extending for approximately 180.degree. and beginning and terminating diametrically opposite the other channel, a counter-bearing provided in said passageway downstream of said insert in the form of a plate extending transversely through said fluid passageway, and oriented approximately transversely to a line connecting terminal ends of said channels, facing end faces of said insert and said plate having bearing cavities formed therein for journalling, with axial clearance, a shaft of a rotor, a rotor having a shaft journalled in said cavities and a body extending transversely to said shaft, and from which rod elements extend in the downstream direction in spaced relationship to said shaft, and the meter further comprising an infrared transmitter and an infrared receiver disposed in opposition to each other, said transmitter being arranged to direct a light beam to said receiver so that when the rotor rotates the light beam is periodically interrupted by said rod elements.
A fluid flow rate meter comprising:
A fluid flow rate meter comprising:
Dependencies are inferred from the claim text.