Abstract: The utility knife of the present invention has a cutting blade that is extended to any desired length from the knife handle by providing a blade assembly and a blade deployment device supported in an internal cavity within a knife handle. In particular, the blade can be extended any desired distance from the front face of the handle between the full deployed position and the fully retracted position. No additional structure or locking devices are generally required to retain and hold the blade in a predetermined position from a handle opening when it has been deployed by the blade deployment device. Optional aspects of the invention include a blade position arm and indices, a locking collar and an elongated handle that may be made to articulate.

Abstract: The present invention provides a mosquito net frame. A rectangular top frame portion of the mosquito net frame is realized by easily assembling square tubes or rods and fittings together. Square tubes or rods are also used for corner columns that also interface with the fittings of the top frame at each corner of the top frame. A foot is added at the bottom of each column to assist in supporting the mosquito net frame from a frame of a cot or from a ground surface. A conventional mosquito netting or other fabric is supported by the mosquito net frame to protect a sleeping person. Disassembly and transport is realized by simply pulling the square tubes from the fittings and placing the components in a container with a secured lid for carrying, shipping and storing the mosquito net frame.

Abstract: The retainer or snap-ring tool of this invention includes a pair of jaws with only one of the jaws attached to a single handle. The jaws are disposed to be spread apart one from the other by a jaw positioning device. The lower end of each jaw is equipped with a tip to interface with the free ends of various types of snap-rings. The tips force the ring to extend or contract when placing the ring on a shaft or within a cylindrical bore of a body. The jaw positioning device comprises a threaded shaft having a positioning wheel formed integral with the shaft to rotate the shaft and move the pair of tips at the ends of the jaws with respect to one another. The tips remain a fixed distance from one another without gripping the handle. The universal tool of this invention works equally well for internally and externally applied snap-rings without any changing or modification of the tool.