Paint roller

Apparatus for applying paint or other fluid material to a surface, which apparatus comprises a wheeled carriage for movement along a floor or other generally flat surface, said carriage including a base element supported by wheels and having a well for receiving a paint pail or the like, applicator means having a paint absorbent surface and manifold means for receiving paint and distributing the paint evenly over said absorbent surface and peristaltic pump means mounted on said carriage including a flexible conduit for delivering fluid therethrough from the pail positioned in said well to said manifold means, said peristaltic pump comprising a semi-circular casing having the circular portion of its wall lined with said flexible conduit, a motor driven propeller mounted co-axially within said casing, said propeller having distal ends opposing each other and an arm pivotally mounted on each of said ends, compression spring means normally biasing the arms away from each other so as to urge said arms toward said conduit, a roller mounted on each arm, each mounted by an axle for rotational movement and in engagement with said conduit under biasing of said spring means during rotation of said propeller whereby rotation of said propeller causes the rollers to alternately roll against the inner surface of said flexible conduit and produce a peristaltic pumping action to force fluid through the conduit, and pressure release means acting against said spring means for pivotally moving said arm members toward each other against the biasing of said spring means to relieve pressure of said rollers on said conduit and thereby stop the peristaltic pumping action through said conduit so that cleaning fluid can be directed through said conduit for cleaning purposes, said pressure release means including a cap mounted co-axially with said propeller and rotatable relative thereto, said cap having a peripheral circular wall with internal cam surfaces each engaging one of said axles for moving an axle and roller inwardly and away from engagement with said conduit upon rotation of said cap relative to said propeller.

Apparatus for applying paint or other fluid material to a surface, which apparatus comprises:

• a wheeled carriage for movement along a floor or other generally flat surface, said carriage including a base element supported by wheels and having a peripheral skirt and a well for receiving a paint pail or the like, peristaltic pump means mounted on said carriage including a flexible conduit for delivering fluid therethrough from a pail positioned in said well, applicator means having a paint absorbent surface and manifold means for receiving paint from said conduit and distributing the paint over said absorbent surface, said applicator means comprising a paint roller having a bifurcated yoke with a handle secured thereto, said conduit delivering paint to approximately the center of said manifold and said manifold having paint delivery ports increasingly graduating in size from the center thereof to each end thereof for even delivery of paint over the width of the paint roller, a trough member secured to said manifold below said roller with said handle in normal upright use position with the roller at the top thereof, said trough extending between said roller and said handle along the width of the roller for catching drippage from the roller, and hood member upstanding from said base and overlying said well above paint pail level, hook means on said hood member for engaging and hanging said paint roller by its manifold in upright position, said hood member including a top aperture and a grippable element whereby a hand inserted through the aperature can grip the grippable element for purposes of moving said carriage, said handle being mounted to said manifold with a bifurcated leaf spring having its base secured to the handle and extending to and secured to said manifold, said handle being hollow and said conduit extending through the length of the handle and into the manifold, said handle also including slidably mounted cam means engaging said flexible tube for pinching said flexible tube to stop or control the rate of flow therethrough from said peristaltic pump, said pump comprising a semi-circular casing having its circular top wall lined with said flexible conduit, a motor driven propeller mounted co-axially within said casing, said propeller having two distal ends opposing each other by about 180.degree., an arm pivotally mounted on each of said distal ends, a compression spring biasing each arm away from the opposite end of the propeller so as to urge said opposite ends normally away from said propeller and toward said conduit, a roller mounted on each arm for rotational movement in engagement with said conduit whereby rotation of said propeller causes said rollers to alternatively roll against said flexible conduit and produce a peristaltic pumping action to force fluid through the conduit, and pressure release means for said rollers acting against said spring means for pivotally moving said arm members toward each other to relieve pressure of said rollers on said conduit and thereby stop the peristaltic pumping action through said conduit, said pressure release means comprising a rotatable cam member in the form of a cover manually accessible from the exterior of said carriage, said cover being rotatable about the same axis as said propeller and having two inwardly convoluted cam surfaces, each approximately 180.degree., for engaging the axles of said two rollers and urging said axles and rollers inwardly toward each other during an approximate 180.degree. rotation of said cover whereby said arms are moved toward each other and toward the propeller and said springs are compressed.