Patent ID: 8510983

Claim:
A pivot mount mechanism for a firearm sighting device, comprising: a mount base adapted to be secured in substantially fixed relation on a firearm and having a pivot projection extending from said mount base and defining a pivot shaft receptacle and having a first lock member; a pivot shaft being disposed in linearly and rotationally moveable relation within said pivot shaft receptacle of said pivot projection of said mount base and defining an external thread; a sight support member having an internal thread in threaded engagement with said external thread and establishing a substantially immoveable connection of said sight support member and said pivot shaft, said sight support member being pivotally moveable to a sighting position and to a laterally offset non-sighting position; said pivot projection defining a spring receptacle about said pivot shaft; a spring member being located within said spring receptacle and applying spring force to said pivot projection and to said sight support member and urging said sight support member toward a position establishing releasable locking engagement of said first and second lock members; and a second lock member being disposed in fixed relation with said sight support member and being moveable into locking engagement with said first lock member and releasably securing said sight support member at said sighting position.