Adjustable, locking armrest for chair

Abstract

An armrest that is infinitely adjustable is provided by the combination of a pin and slot arrangement for adjusting the arm in one direction and a second pin and slot arrangement for angularly adjusting the arm in a different direction, the second pin being in the form of a locking cam which locks the arm to a portion of the chair.

1 . An armrest for a chair, comprising: 
 a. an arm having a longitudinal arm slot therein;    b. a bracket having a generally planar face connected to the chair, the bracket having a swivel pin on which the arm is disposed at the arm slot;    c. a friction disk having a bore and disposed between the arm and the bracket; and    d. locking means for compressing the arm, bracket, and friction disk together to lock the arm in place.    
   
   
       2 . The armrest of  claim 1 , further comprising an arm pad.  
   
   
       3 . The armrest of  claim 1 , wherein the locking mechanism is a levered cam.  
   
   
       4 . The armrest of  claim 1 , wherein the locking washer has a continuous flange on at least one face.  
   
   
       5 . The armrest of  claim 1 , wherein the locking washer has a discontinuous flange on at least one face.  
   
   
       6 . The armrest of  claim 2 , further comprising means for laterally adjusting the position of the pad.  
   
   
       7 . The armrest of  claim 1 , wherein said locking means comprises a locking rod passing through the arm slot, the bore of the friction disk, and the bracket slot, one end of the locking rod being fixed, the other end of the locking rod having a locking mechanism for compressing the arm, friction disk, and bracket together.  
   
   
       8 . The arm rest of  claim 7 , wherein the locking mechanism is a cam.  
   
   
       9 . The armrest of  claim 8 , wherein the cam is a portion of a lever pivotally attached to the locking rod.  
   
   
       10 . The armrest of  claim 1 , wherein the locking means comprises a locking rod passing through the arm slot, the bore of the friction disk, and the bracket slot, one end of the locking rod being fixed, the other end of the locking rod having being threaded and having a knob with a corresponding thread for compressing the arm, friction disk, and bracket together.  
   
   
       11 . An armrest for a chair, comprising: 
 a. an arm having a longitudinal arm slot therein;    b. a strut having a strut slot substantially along its length and being pivotally attached to the chair;    c. a friction disk having a bore and disposed between the arm and the strut; and    d. locking means for compressing the arm, the strut, and the friction disk together to lock the arm in place.    
   
   
       12 . The armrest of  claim 11 , wherein said locking means comprises a locking rod passing through the arm slot, the bore of the friction disk, and the bracket slot, one end of the locking rod being fixed, the other end of the locking rod having a locking mechanism for compressing the arm, friction disk, and bracket together.  
   
   
       13 . The arm rest of  claim 12 , wherein the locking mechanism is a cam.  
   
   
       14 . The armrest of  claim 13 , wherein the cam is a portion of a lever pivotally attached to the locking rod.  
   
   
       15 . The armrest of  claim 11 , wherein the locking means comprises a locking rod passing through the arm slot, the bore of the friction disk, and the bracket slot, one end of the locking rod being fixed, the other end of the locking rod having being threaded and having a knob with a corresponding thread for compressing the arm, friction disk, and bracket together.  
   
   
       16 . An armrest for a chair, comprising: 
 a. an arm having a bore therein;    b. a bracket having a generally planar face connected to the chair, the bracket having an upstanding portion;    c. friction disk means between the arm and the bracket selected from the group consisting of a friction disk disposed therebetween, a friction disk integral with the bracket, or a friction disk integral with the arm, said friction disk means having a bore therein; and    d. locking means for compressing the arm, bracket, and friction disk means together to lock the arm in place.