Abstract: The present invention relates to tools or devices which are commonly used for extracting or removing damaged or broken male threaded pipe fittings from their female threaded fitting counterparts. Said damaged male pipe fittings are often removed or extracted as a cost savings measure, in order to salvage the female fitting portion. This avoids the necessity and cost of discarding and replacing both the damaged or broken male fitting, as well as the undamaged female fitting or fittings. This salvage process is especially cost effective in cases where the broken or damaged male pipe fitting in question, is part of a larger, more expensive plumbing assembly or system.

Abstract: The present invention relates to tools or devices which are commonly used for extracting or removing damaged or broken male threaded pipe fittings from their female threaded fitting counterparts. Said damaged male pipe fittings are often removed or extracted as a cost savings measure, in order to salvage the female fitting portion. This avoids the necessity and cost of discarding and replacing both the damaged or broken male fitting, as well as the undamaged female fitting or fittings. This salvage process is especially cost effective in cases where the broken or damaged male pipe fitting in question, is part of a larger, more expensive plumbing assembly or system.

Abstract: The present invention relates to a vehicle propulsion system. In an exemplary use described, the vehicle propulsion system is intended for a personal amphibious vehicle capable of efficiently transversing water, snow, land, ice and the like. In a preferred form, the vehicle propulsion system includes a pair of continuous belt tracks which are independently driven from a power plant.

Abstract: A power drive yoke adapted for quick attachment to and disconnection from an output drive shaft of a power drive means comprises a yoke having a hub formed thereon. The hub has a centrally disposed longitudinally extending bore for accepting a portion of the output drive shaft. The output drive shaft is mechanically interconnected to the yoke to rotationally drive the yoke by passing means. An annular groove is provided on the portion of the output shaft and is accepted within the bore in the hub. The hub is provided with at least two generally parallel bores each tangentially intersecting the bore on its opposite sides. A locking pin is slidably disposed in each of the parallel bores and has a locking surface thereon to engage the annular groove on the output shaft. Means are provided to connect each of the locking pins to substantially simultaneously slidably move the locking pins within the bores into engagement and disengagement with the output shaft at its annular groove.