Abstract: A rotary scraper device for treating a work surface, comprises a generally cylindrical hollow hub casing having a peripheral wall. The hub casing has a closed end wall and open opposite end with a cover plate removably mounted on the open end of the hub casing, and a shaft extending axially outward of the cover plate for rotating the hub casing axially in one direction. Spaced walls inside the hub define chordal channels opening at the peripheral wall. The channels terminate at axially disposed sleeves inside the hub casing. Springy U-shaped clips have cylindrical bights fitted in the sleeves and springy side walls abutting spaced walls of the channels. Springy ends of the clips extend outwardly beyond the peripheral wall of the hub casing. Straight springy shanks of the fingers fit turnably in coplanar array inside the clips axially of the hub casing. Knuckles at ends of the fingers fit in the cylindrical bights axially of the hub casing.

Abstract: A rotary device for treating a work surface comprises a generally cylindrical hub body having a closed end wall, an open other end, and a rather serpentine endless peripheral wall formed with smoothly merging cylindrical wall sections, curved wall sections, flat wall sections and inner cylindrical wall sections. The flat wall sections define channels and the inner cylindrical wall sections define sleeves for removably receiving interchangeable springy fingers with cylindrical knuckles at their inner ends in side-by-side array axially of the hub body. Free ends of the springy fingers extend chordally outward from the hub body in directions opposite to the direction of rotation of the hub body. A centrally apertured cover plate closes the open end of the hub body. A bolt extends axially through a central passage in the hub body. The bolt has a keyed head mating nonrotatably with a corresponding keyed end of the central passage to insure insertion of the bolt in correct axial direction in the hub body.

Abstract: This portable container for liquids includes a bottom ring plate on which is nested an upper pressure plate. An elastic membrane overlays the pressure plate to define therewith a chamber for containing a liquid under pressure. The membrane has a circumferential side wall abutting a side wall of the pressure plate, and an inturned wall section engaged between side walls of the ring plate and pressure plate. A nipple having a threaded axial bore opening into the chamber is integral with the pressure plate and extends downwardly through a central hole in the ring plate. A fitting having an externally threaded shank is engaged in the threaded bore of the nipple. The fitting has a radially extending other nipple on which is secured a flexible tube for passing liquid under pressure into and out of the chamber while the membrane expands and contracts. The fitting may have a radially extending head abutting a flange which is integral with the ring plate and surrounds the central hole, to hold the assembly together.