Abstract: A versatile cleaning device including a top cleaning assembly that includes a top cleaning means and a mount; a first shaft constructed to be fixedly or removably coupled to the top cleaning assembly; a side cleaning assembly that includes a side cleaning means, a body, and a first shaft receiving hole; and a second shaft constructed to be fixedly or removably coupled to the side cleaning assembly. The second shaft is constructed to be attached to the handle for electrically rotating the versatile cleaning device.

Abstract: A cleaning device includes a spinning brush assembly that cleans the item; an electric motor to actuate the spinning brush assembly; a battery to power the electric motor; a first switch to turn on and off the electric motor; a housing that receives the electric motor and battery and provides a pair of protruding ribs to further receive brushes constructed to be received therein; and a sleeve that is detachably attached to the housing covering the housing and the pair of ribs. The cleaning device further includes first container and one or more second containers in which the first and second containers are attachable by threaded coupling means and snugly received in the sleeve.

Abstract: A multi-purpose spade includes a spade head having a “V”-shaped cutout; a detachable tip constructed to substantially conform to the “V”-shaped cutout of the spade head; and nuts and bolts for fastening the detachable tip to the spade head in which spade head includes first and second inner edges, and cutting edges or blades are formed on the first and second inner edges. However, such cutting edges or blades are not formed on a region adjacent to the pointed end of the “V”-shaped cutout, and first and second inner edges form an angle of about 30˜40 degrees, and more preferably about 30 degrees. The first and second edge portions have longitudinal slots respectively to receive the first and second inner edges.

Abstract: A multi-purpose spade includes a spade head having a “V”-shaped cutout; a detachable tip constructed, to substantially conform to the “V”-shaped cutout of the spade head and a fastening means for fastening the detachable tip to the spade head. The spade head includes first and second inner edges, and cutting edges or blades are formed on the first and second inner edges. However, such cutting edges or blades are not formed on a region adjacent to the pointed end of the “V”-shaped cutout. The first and second inner edges form an angle of about 30˜40 degrees, and more preferably about 30 degrees. The first and second edge portions have longitudinal slots respectively to receive the first and second inner edges. The fastening means may be nuts and bolts such that bolts pass through holes, formed, on the edge portions and inner edges, being fastened to nuts.

Abstract: A multi-purpose spade includes a central plate, first and second edge plates, and a retreating crescent blade. The central plate is generally concave. The retreating crescent blade is formed along the tip portions of the central plate and the first and second plates. The inner edge portions of the first and second plates are connected to corresponding side portions of the central plate with a predetermined angle so as to form two crest portions on the front surfaces along the side portions of the central plate. The multi-purpose spade may further comprise an extending blade configured to be connected to the retreating crescent blade.

Abstract: A multi-purpose spade includes a central plate, first and second edge plates, and a retreating crescent blade. The central plate is generally concave. The retreating crescent blade is formed along the tip portions of the central plate and the first and second plates. The inner edge portions of the first and second plates are connected to corresponding side portions of the central plate with a predetermined angle so as to form two crest portions on the front surfaces along the side portions of the central plate. The multi-purpose spade may further comprise an extending blade configured to be connected to the retreating crescent blade.

Abstract: A practice golf ball comprises a spherical member, a weight member, and a coating means. The spherical member is made of a paper and formed between about 1.5 inch and 2.5 inches in diameter. The coating means coats a spherical surface of the spherical member so that the coating means protects the spherical member against an external impact. For a better performance, the spherical member is made of corrugated paper. The corrugated paper spherical member has a plurality of parallel substantially cylindrical cavities. The plurality of parallel substantially cylindrical cavities can be formed by the plurality of wave forming sheets sandwiched between the plurality of layering sheets.

Abstract: A multi-utility shoe brush system (11) is provided which includes a main body (13) having a several sides meeting other adjacent sides to form angles greater than ninety degrees so a plurality of paste applicator brushes (17, 19, 21b), a soft buffing brush (45), hard soil-removing brush (21a, 53), and one or more polishing pads (23, 27). A handle (31) is attached to the main body (13) to increase the efficiency of the use of the multi-utility shoe brush system (11), and its cleanliness. Each of the brushes and polishing pads is recommended to be removably attached to the main body (13). A shoe horn (49) is attached at the free end of the handle (31) for an additional utility.

Abstract: A process for the preparation of surface modified, multilayered, composite membranes are disclosed. This process comprises the steps of: subjecting the surface of porous polysulfone membranes to sulfonation to introduce sulfonic acid functional groups onto the surface of the membranes; and either subjecting the sulfonic acid functional groups so introduced to silylation with reactive polysiloxanes to undergo grafting the polysiloxanes on the introduced functional groups, followed by applying polysiloxanes coating along with cross-linking agent onto so treated membranes to allow to undergo cross-linking; or carrying out both the silylation step and the coating and cross-linking step simultaneously.The membranes so produced are useful in gas separation systems for oxygen enrichment of air.