Abstract: Improvements to a portable fire extinguisher are disclosed. The improvements allow for frequent and simpler untrained and automatic self-servicing of a fire extinguisher. The improvements include an anti-bridging mechanism that fluffs, mixes or stirs the powder within the chamber to keep it in a liquefied state. Additional improvements include a larger opening to more quickly fill and inspect the powder within the chamber. Another improvement includes the use of a CO2 canister located external to the chamber to allow easier servicing or replacement of just the CO2 canister as well as the ability to maintain the chamber in an un-pressurized condition, allows for non-HASMAT shipping. These features will extend the service intervals while maintaining the fire extinguisher in a ready condition.

Abstract: A crankable hand wrench includes an elongated main handle having opposite end portions, opposite faces extending between the opposite end portions, and a slot in the main handle nearer to one than the other of the opposite end portions, a wrench head attached to and extending from at least the other of the opposite end portions of the main handle, and a crank assembly incorporated by the main handle. The slot is formed through the main handle between the opposite faces thereof so as to open at the opposite faces. The crank assembly includes a crank handle movable between a stored position in which the crank handle is disposed within the slot and a deployed position in which the crank handle extends from the main handle so as to form a substantially L-shaped crank therewith.

Abstract: A screwdriver device comprises a handle; a shank being rotatably mounted within the handle; a gear provided at the middle part on the shank; an operating lever extending from an upper plate and a lower plate formed therewith; a claw member provided at a suitable position formed between the upper plate and the lower plate which are superposed, the claw member having two pointed corners at the front end thereof which are switchable to the left or right to be respectively engaged into a groove of the gear and which, in use, move the shank to rotation; and a rotary member provided at a suitable position on the handle and fixed with the shank for facilitating a user's hand to directly operate to rotate the shank.