Abstract: A mechanical broadhead arrowhead has moveable blades that deploy from a retracted in-flight configuration to an outward deployed configuration as the broadhead strikes the target. Once in the deployed configuration, the blades are locked to each other against the resistance of the target, but freely pivot about the ferrule. Accordingly, if one blade strikes an obstruction such as a solid bone, the blade assembly simply pivots out of the way without damaging the blade, deflecting the trajectory of the arrow, or halting its penetration into the target.

Abstract: A mechanical broadhead arrowhead has moveable blades that deploy from a retracted in-flight configuration to an outward deployed configuration as the broadhead strikes the target. Once in the deployed configuration, the blades are locked to each other against the resistance of the target, but freely pivot about the ferrule. Accordingly, if one blade strikes an obstruction such as a solid bone, the blade assembly simply pivots out of the way without damaging the blade, deflecting the trajectory of the arrow, or halting its penetration into the target.

Abstract: A system of utilizing a single radio receiver with continuously broadcast GPS signals in order to determine precise relative positioning between two arbitrary positions or to determine current position. The invention includes utilizing changes in the carrier signal as detected by the GPS receiver occurring as a result of the movement from a first position to a second position.

Abstract: For the recovery of the protein from oil seeds, particularly from soy beans, grinding is effected under omission of a suspension liquid, i.e. substantially in dry condition of the oil seed, by applying pressure and friction until the cell walls of the oil seed are opened. This is preferably realized on a friction roller refiner comprising at least two rollers of different speed, i.e. for example on a three-roller-refiner, a five-roller-refiner or also at least two two-roller-refiners. Surprisingly, in this way the expenditure in energy is reduced and the quality of the product is improved.