Cam lock for cantilever mounting device

Abstract

A cantilever mounting device includes a front member on which an object is mounted and a back member for attachment to a load-bearing surface. A first arm is connected to the back member to form a rotatable first joint. A second arm is connected to the first arm to form a rotatable second joint. The front member is connected to the second arm to form a rotatable third joint. The first joint includes a first cam including a first lever and a first shaft for connecting the back member to the first arm. The first cam allows rotation about an axis of the first joint when the first lever is set to a first adjustment position. The first cam does not allow rotation about the axis of the first joint when the first lever is set to a first locked position.

1 . A cantilever mounting device comprising:
 a front member on which an object is mounted;   a back member for attachment to a load-bearing surface;   a first arm connected to said back member to form a rotatable first joint;   a second arm connected to said first arm to form a rotatable second joint;   said front member connected to said second arm to form a rotatable third joint;   wherein said first joint includes a first cam including a first lever and a first shaft for connecting said back member to said first arm;   wherein said first lever is set in a first locked position and a first adjustment position;   wherein said first cam allows rotation about an axis of the first joint when said first lever is set to said first adjustment position, and said first cam does not allow rotation about the axis of the first joint when said first lever is set to said first locked position.   
     
     
         2 . The cantilever mounting device of  claim 1 , wherein
 said first cam includes an adjustment dial; and   said first cam allows rotation of said adjustment dial when said first lever is set to said first adjustment position, and said first cam does not allow rotation of said adjustment dial when said first lever is set to said first locked position.   
     
     
         3 . The cantilever mounting device of  claim 2 , wherein
 the rotation of said adjustment dial increases or decreases a tension of the first joint.   
     
     
         4 . The cantilever mounting device of  claim 1 , wherein
 said first cam includes a first base, a first pivot pin, and an adjustment dial;   wherein said first pivot pin is inserted into said first lever and said first shaft to secure said first lever, said first base, and said first pivot pin to a first end of said first shaft;   wherein said adjustment dial is connected to a second end of said first shaft.   
     
     
         5 . The cantilever mounting device of  claim 1 , wherein
 the first locked position of said first lever is provided perpendicular to said first shaft, and the first adjustment position of said first lever is provided parallel to said first shaft.   
     
     
         6 . The cantilever mounting device of  claim 1 , wherein
 said second joint includes a second cam including a second lever, a second shaft, and a tension pin for connecting said first arm to said second arm;   wherein said second lever is set in a second locked position and a second adjustment position;   wherein said second cam allows rotation about an axis of the second joint when said second lever is set to said second adjustment position and said second cam does not allow rotation about the axis of the second joint when said second lever is set to said second locked position.   
     
     
         7 . The cantilever mounting device of  claim 6 , wherein
 said second cam allows rotation of said tension pin when said second lever is set to said second adjustment position, and said second cam does not allow rotation of said tension pin when said second lever is set to said second locked position.   
     
     
         8 . The cantilever mounting device of  claim 6 , wherein
 the rotation of said tension pin increases or decreases a tension of the second joint.   
     
     
         9 . The cantilever mounting device of  claim 6 , wherein
 said second cam includes a second base and a second pivot pin;   wherein said tension pin is inserted into said second shaft;   wherein said second pivot pin is inserted into said second lever and said tension pin to secure said second lever, said second base, said second pivot pin and said tension pin to said second shaft.   
     
     
         10 . The cantilever mounting device of  claim 6 , wherein
 said tension pin is a screw.   
     
     
         11 . A cantilever mounting device comprising:
 a front member on which an object is mounted;   a back member for attachment to a load-bearing surface;   a first arm connected to said back member to form a rotatable first joint;   a second arm connected to said first arm to form a rotatable second joint;   said front member connected to said second arm to form a rotatable third joint;   said third joint includes a third cam including a third lever and a third shaft;   wherein said third lever is set in a locked position and an adjustment position,   wherein said third cam allows rotation about the axis of the third joint when said third lever is set to said adjustment position, and said third cam does not allow rotation about an axis of the third joint when said third lever is set to said locked position.   
     
     
         12 . The cantilever mounting device of  claim 11 , wherein
 said third cam allows rotation of said third shaft when said third lever is set to said adjustment position, and said third cam does not allow rotation of said third shaft when said third lever is set to said locked position.   
     
     
         13 . The cantilever mounting device of  claim 11 , wherein
 the rotation of said third shaft increases or decreases a tension of the third joint.   
     
     
         14 . The cantilever mounting device of  claim 11 , wherein
 said third cam includes a third base, a third pivot pin, a top pivot, and a bottom pivot;   wherein said third pivot pin is inserted into said third lever and said third shaft to secure said third lever, said third base, and said top pivot pin to a first end of said third shaft;   wherein said bottom pivot is connected to a second end of said third shaft.   
     
     
         15 . The cantilever mounting device of  claim 11 , further comprising:
 a tilt link connected to said top pivot and said bottom pivot;   wherein said tilt link connects said third cam to said front member;   wherein said tilt link provides rotation about an axis perpendicular to the axis of said third joint.   
     
     
         16 . A method of adjusting a cantilever mounting device comprising the steps of:
 applying force to a first lever of a first cam for reducing a tension of a first joint and for setting said first lever to a first adjustment position;   rotating a first arm relative to a back member about the first joint when said first lever is in the first adjustment position;   applying force to said first lever for increasing the tension of the first joint and for setting said first lever to a first locked position such that said first arm is locked in place relative to said back member.   
     
     
         17 . The method of adjusting the cantilever mounting device of  claim 16 , further comprising the steps of:
 rotating an adjustment dial of said first cam to reduce the tension of the first joint when said first lever is set to the first adjustment position.   
     
     
         18 . The method of adjusting the cantilever mounting device of  claim 16 , further comprising the steps of:
 applying force to a second lever of a second cam for reducing a tension of a second joint and for setting said second lever to a second adjustment position;   rotating a second arm relative to said first arm about the second joint when said second lever is in the second adjustment position;   applying force to said second lever for increasing the tension of the second joint and for setting said second lever to a second locked position such that the second arm is locked in place relative to said first arm.   
     
     
         19 . The method of adjusting the cantilever mounting device of  claim 16 , further comprising the steps of:
 applying force to a third lever of a third cam for reducing a tension of a third joint and for setting said third lever to a third adjustment position;   rotating a front member relative to said second arm about the third joint when said third lever is in the third adjustment position;   applying force to said third lever for increasing the tension of the third joint and for setting said third lever to a third locked position such that the front member is locked in place relative to said second arm.   
     
     
         20 . The method of adjusting the cantilever mounting device of  claim 19 , further comprising:
 tilting the front member about an axis perpendicular to the third joint.