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US 3,942,915 AGranted
Flexible tube pump
AssigneeDias, Incorporated
InventorCarlisle Alton Thomas
Life of this patent
Estimating the term…
Abstract
A flexible tube pump comprises motor means having mounting elements on the casing thereof and a rotatable shaft. A rotor is carried by the shaft and impeller elements are distributed circumferentially on the rotor to orbit as the rotor rotates. A substantially U-shaped shield has leg means securable to the motor casing mounting elements and a semicircular bight portion cantilevered from the leg means substantially concentrically of the orbit of the impeller elements. A compressible tube is engagable between the shield and orbiting impeller elements. A housing may enclose the motor, rotor and shield, the motor being fixed to a cover on the housing and end portions of the tube extending out through a wall of the housing.
Claims13
A flexible tube pump, comprising in combination:
- motor means having mounting means and a rotatable shaft;
- a rotor carried by said shaft for rotation therewith and located adjacent said motor means;
- impeller means distributed circumferentially on said rotor and responsive to rotation of said rotor for orbiting therewith;
- a substantially U-shaped shield having leg means securable on said motor means through said mounting means and a semi-circular bight portion cantilevered from said leg means in substantially concentric relation with the orbit of said impeller means;
- a compressible tube for carrying a fluid, said tube being engageable between said shield and said impeller means and having end portions extending along said leg means, said shield having a U-shaped peripheral wall substantially parallel to said shaft and opposed to said impeller means, the edge of said peripheral wall remote from said motor means being flanged inwardly to overlie said tube, and including a plate-like bearing member extending between said leg means substantially as a continuation of said flange and having a bearing surface engageable with a central portion of said rotor and backing same against the restoring force of the compressed tube;
- whereby rotation of said rotor by said shaft causes said impeller means to move said fluid through said tube.
3 more elements
A flexible tube pump, comprising in combination:
- an electric motor unit including an elongate casing housing an electric motor at one end, a laterally offset drive shaft and bearings therefor at the other casing end and an intervening reduction drive train for rotatably driving said shaft from said motor, said shaft extending forwardly through a front wall of the casing, the casing further having a pair of laterally opposed mounting portions laterally spaced across an intermediate portion of said casing front wall, said mounting portions and shaft being located at the apices of a triangular zone of said front wall;
- a rotor on said shaft;
- impeller means distributed circumferentially on the front of said rotor and responsive to rotation of the rotor for orbiting therewith;
- a shield having a two-point support formed by a pair of column-like bosses releasably fixed to said casing mounting portions and extending forwardly therefrom, said shield further having a U-shaped band solely supported by lateral cantilevering from said pair of bosses in forwardly spaced relation to said casing front wall, said U-shaped band having a semicircular bight portion and a pair of side-by-side leg portions each of said leg portions having a first end and a second end, said first ends of said leg portions being joined to each other by said bight portion, forward ends of said column-like bosses being connected to said second ends of said leg portions, said impeller means facing the inner surface of said band, said semicircular band portion being concentric with said shaft and the orbit of said impeller means;
- a compressible tube for carrying a fluid and laterally squeezable between said shield band and said impeller means and having end portions extending along said leg portions;
- whereby rotation of said rotor by said shaft causes said impeller means to move said fluid through said tube.
3 more elements
A flexible tube pump, comprising in combination:
- a motor unit having a casing and a rotatable shaft extending forwardly therefrom;
- a unitary molded plastic rotor comprising a disk fixed on and rotatably carried by said shaft forward of said casing, and a plurality of integral circumferentially distributed spindles extending forward from said disk and terminating in radially enlarged integral heads;
- a molded plastic roller rotatably carried by each spindle and snap fitted over the head thereof, said rollers extending radially beyond said disk and orbiting therewith;
- a unitary molded plastic shield substantially of horseshoe shape comprising a U-shaped semicircular band with laterally spaced ends and integral column-like mounting members extending rearwardly from the band ends toward and releasably securable at spaced points of the motor casing, the shield having an open back for receiving said rollers forwardly thereinto in centered, axially coextensive relation with a semicircular intermediate portion of said U-shaped band, the front face of said rotor disk substantially closing said open back of said shield, the front of said shield being open except for a substantially D-shaped flanged structure integral with the front edge of said band and including a radially inwardly extending flange partially overlapping the rollers and a cross member connecting end portions of the U-shaped band adjacent the shaft and mounting members;
- a compressible tube for carrying a fluid and engageable between the shield band and rollers and having ends extending laterally beyond said column-like mounting members;
- means fixed on and extending laterally inboard from the upstream one of said column-like mounting members for releasably fixing said tube thereto.
3 more elements
Dependencies are inferred from the claim text.