Abstract: A tip holder for the rotor of a centrifugal mineral breaker with a mounting member portion and a step with a mineral anchoring portion capable of retaining a bank of mineral material in which the minerals may have a diameter of up to 100 mm. The step also has one or more recesses formed longitudinally through the step and an insert of abrasion resistant material inserted in each recess. The width of a material retaining surface of said step is approximately equal to or greater than the depth of the insert of abrasion resistant material. A plurality of longitudinally disposed parallel inserts can be placed in the tip holder to maximize its resistance to specific mineral conditions.

Abstract: An interior clamping device for tubular poles which includes a driver disposed in one tubular member with a tapered end portion projecting outwardly from the tubular member. An expandable sleeve is disposed in a second tubular member. Locking means removably secure the driver to the sleeve by a fastener so that when the driver is rotated in one direction the expandable sleeve is moved radially outwardly against the inner surface of the tube to lock the tubes together.

Abstract: A cleaning appliance has a head portion 1 with a rearwardly projecting handle section 5, and presents at the front end opposed jaw members 2 and 3 between which a squeegee blade assembly 4, or another device such as a scraper blade or duster attachment, can be releasably clamped. The clamping arrangement comprises an operating level 8 disposed at a front upper surface 1a of the head portion 1 and positioned for single-handed operation by an operator using the thumb or forefinger of the hand in which the handle section is held.

Abstract: An elongated strut which has a pair of inwardly depending flanges formed to receive and secure fittings inserted into the continuous slot of the strut anywhere along the length of the slot. The flanges define an interior cavity to receive and hold strut fittings and accessories.

Abstract: An improved squeegee has a releasable clamping member mounted to the flared portion of the squeegee handle. A pivot pin is disposed in the clamping member in a position transverse to the handle, with the ends of the pin secured to fasteners mounted on opposite sides of the clamping member. The fasteners hold the flared portion of the handle and the back clamping plate which secures the support channel of the squeegee. When the position of the clamping member is shifted past its fulcrum point, the support channel is released for lateral movement.