Take-down folding knife

Claim 1

A take-down folding knife comprising: (a) a blade having a free extremity and an opposed pivoted extremity, a cutting portion adjacent said free extremity and a tang portion defined by two flat, uniformly spaced faces adjacent said pivoted extremity, (b) a pivot post fixedly attached to said tang portion and extending substantially equidistantly from each face thereof, said pivot post having a generally circular cylindrical outer surface the longitudinal axis of which is perpendicular to said tang portion, and an interior having a cylindrical recess in one extremity, a slotted recess in the opposite extremity, and a cylindrical channel communicating between said recesses, (c) two elongated handle panels of substantially indentical outer perimeter configuration, each comprised of a blade-engaging extremity and an opposed free extremity, oppositely disposed receiving and back edges, and inner and outer faces, said blade engaging extremities being provided with apertures by which said panels pivotably engage said pivot post, said panels being interconnected by threaded fasteners adjacent said back edges to form an enclosure of uniform spacing between said inner faces, (d) the aperture of at least one of said handle panels having two diametrically opposed locking recesses, said handle panel engaging the extremity of said pivot post having said slotted recess, (e) a locking key disposed within said pivot post, said locking key having a generally T-shaped configuration comprising a leg portion, and a head portion having pendant shoulders extending in the direction of said leg portion, being adapted to slideably fit within said cylindrical channel and having a threaded extremity, said head portion being adapted to fit at least partially within said slotted recess while said shoulders enter said locking recesses, (f) retainer means adapted to engage the threaded extremity of said leg portion and fit at least partially within said cylindrical recess, and (g) a coil spring disposed about said leg portion and in abutment with said retainer means and said pivot post in a manner to draw said locking key into said pivot post, whereby (h) the head portion of said locking key, when drawn into said pivot post by said spring, locks the position of the blade by engagement with said slotted recess and the locking recesses of one of said handle panels when the blade is either in its deployed mode or in its sheathed mode between said handle panels, and (i) rotation of said blade to either of its two locked modes is permitted by forcing said locking key from said pivot post against the action of said spring.