Adjustable bases for sighting devices

  • US 8,240,075 B1
  • Filed: 01/13/2011
  • Issued: 08/14/2012
  • Est. Priority Date: 01/13/2011
  • Status: Active Grant
First Claim
Patent Images

1. An adjustable base for attaching sighting systems to ballistics projectile launchers, comprising:

  • a lower base rail adapted for removable attachment to an upper surface of such launcher, an upper rail pivotally attached to the lower rail at the forward or muzzle end of each of these rails, with said upper rail adapted for removable attachment of a sighting system to the upper surface of the upper rail;

    an elevation mechanism for elevating the rear or breech end of said upper rail to depress the line of sight of the sighting device, said elevation mechanism comprising an adjustment or index wheel configured to turn a vertical threaded shaft which moves upward in a screw jack fashion as said index wheel turns and moves the rear of said upper rail upward by pressure of said threaded shaft on a lateral pin installed across a vertical recess at the rear of said upper rail, whereinsaid threaded shaft is fitted with an oblong lobe at the top thereof, said vertical recess has an oblong shape to accommodate said oblong lobe and said lateral pin is free to move from side to side within a slot within said oblong lobe as said lobe and said upper rail are raised and lowered, such that said threaded shaft maintains a position perpendicular to said lower base rail.

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