Pivot mount for firearm sighting devices

A pivot mount mechanism for a sighting device of a firearm, comprising:

• a mount base adapted to be secured in substantially fixed relation on a firearm and defining spaced pivot shaft sections each defining a pivot shaft opening, said mount base defining pairs of opposed pivot shaft location depressions having rotational relation of substantially 90′;
• a pivot shaft and having end portions being supported for rotational and linear movement within said pivot shaft openings of said spaced pivot shaft sections of said mount base;
• a pivot pin extending through said pivot shaft and projecting laterally from said pivot shaft and defining pivot shaft location surfaces disposed for rotationally positioning engagement within said pivot shaft location depressions;
• a spring member applying spring force to said mount base and to said pivot shaft urging said pivot shaft toward said pivot shaft location depressions;
• a sight support member being fixed to said pivot shaft and being rotationally and linearly moveable with said pivot shaft, said sight support member supporting a firearm sighting device;
• and
• said pivot shaft being selectively positionable at an operative sighting position in position controlled relationship with said pivot shaft location depressions permitting precision aiming location of the firearm sighting device and being selectively rotatably positionable to establish an inoperative laterally offset position of said sight support member and the firearm sighting device.

A pivot mount mechanism for a sighting device of a firearm, comprising:

• a mount base being fixed to a firearm and defining a pivot shaft bore and pivot shaft location surfaces being oriented in substantially 90° rotational relation;
• a pivot shaft being supported by said pivot shaft bore for rotational and linear movement relative to said mount base;
• a pivot shaft locator element extending from said pivot shaft and being disposed for positioning engagement with said pivot shaft location surface;
• a spring member applying spring force to said mount base and to said pivot shaft urging said pivot shaft linearly toward said pivot shaft location surface;
• a sight support member being fixed to said pivot shaft and being rotationally and linearly moveable with said pivot shaft, said sight support member supporting a sighting device;
• and
• said pivot shaft being selectively positionable at an operative sighting position in positioned engagement with said pivot shaft location surface by said spring force permitting precision aiming of the firearm and being selectively movable linearly against said spring force to a position unseating said pivot shaft location element from said pivot shaft location surface permitting manual rotational positioning of said sight support member to an inoperative position establishing laterally offset inoperative positioning of the sighting device.

A pivot mount mechanism for a sighting device of a firearm, comprising:

• a mount base adapted to be secured in substantially fixed relation on a firearm and defining first pivot shaft location surfaces having rotational relation of substantially 90°, said mount base defining spaced sections having a defined spacing therebetween, each of said spaced sections having a pivot shaft bore;
• a pivot shaft being supported for rotational and linear movement within said pivot shaft bores;
• a pivot shaft locator element extending from said pivot shaft and defining second pivot shaft location surfaces disposed for rotationally positioning engagement with said first pivot shaft location surfaces;
• a sight support member being fixed to said pivot shaft and having less dimension than said predetermined dimension and being rotationally and linearly moveable with said pivot shaft and within said defined spacing between said spaced sections, said sight support member supporting a sighting device;
• a spring member applying spring force to said mount base and to said pivot shaft and sight support member urging said pivot shaft and sight support member toward positioning engagement of said second pivot shaft location surfaces with said second pivot shaft location surfaces;
• and
• upon linear movement of said sight support member within said defined space and separation of said pivot shaft locator element from said first pivot shaft location surfaces said pivot shaft and said sight support member being selectively rotationally positionable at an operative sighting position in positioning engagement with said first pivot shaft location surfaces permitting precision aiming of the firearm and being selectively rotationally positionable to establish an inoperative laterally offset position of the sighting device.