Chair

Abstract

A chair comprising a seat and a base connected by a cantilever arm wherein the seat is positioned on the projecting end of the cantilever arm. The cantilever arm is pivotally connected to the base such that the projecting end of the cantilever arm is free to rotate about the base. The projecting end of the cantilever arm is also displaceable relative to the base. The seat positioned on the projecting end of the cantilever arm may be positioned into a variety of different locations relative to the base by rotation and displacement of the projecting end of the cantilever arm. A brake may be releasably engaged to inhibit rotation and displacement of the projecting end of the cantilever arm relative to the base. The seat positioned on the projecting end of the cantilever arm and the seat may also rotate at the end of the arm, and is height adjustable.

1 . A chair comprising: 
 a base;    an extendable cantilever arm pivotally connected to said base, the cantilever arm having a first end projecting from said base, said first end being displaceable from said base by extension or retraction of the extendable cantilever arm and said first end being rotatable about said base by the pivotal connection of the cantilever arm to said base;    a seat attached to said first end of said cantilever arm; and    a brake for releasably inhibiting displacement and rotation of said first end of said cantilever arm relative to said base.    
     
     
         2 . The chair of  claim 1  wherein said brake is attached to said cantilever arm, said brake releasably contacting a ground surface such that contact of said brake with said ground surface inhibits displacement and rotation of said first end of said cantilever arm relative to said base.  
     
     
         3 . The chair of  claim 2  wherein said brake is extendable from said cantilever arm.  
     
     
         4 . The chair of  claim 3  wherein said brake is attached to said first end of said cantilever arm.  
     
     
         5 . The chair of  claim 4  wherein said brake is activated to contact the ground surface by tilting said seat.  
     
     
         6 . The chair of  claim 1  wherein the extendable cantilever arm is telescopically extendable.  
     
     
         7 . The chair of  claim 6  wherein the telescopically extendable cantilever arm consists of two members and a stop to inhibit telescopic movement of the two members beyond a predetermined maximum extension.  
     
     
         8 . The chair of  claim 1  wherein said seat is rotatably attached to said first end of said cantilever arm.  
     
     
         9 . The chair of  claim 8  wherein said seat is height adjustable.  
     
     
         10 . The chair of  claim 9  wherein said seat includes a back support.  
     
     
         11 . The chair of  claim 10  wherein said seat includes a knee rest.  
     
     
         12 . The chair of  claim 11  wherein said knee rest is removable.  
     
     
         13 . The chair of  claim 1  wherein said base is securable to a ground surface.  
     
     
         14 . The chair of  claim 1  wherein said base is leveled by a leveler.  
     
     
         15 . The chair of  claim 14  wherein said leveler secures said base to a ground surface.  
     
     
         16 . The chair of  claim 15  wherein said leveler consists of three interconnected threaded members.  
     
     
         17 . A chair comprising: 
 a base, said base securable to a ground surface and leveled by a leveler;    a telescopically extendable cantilever arm pivotally connected to said base, the telescopic cantilever arm consisting of two members and a stop to inhibit telescopic movement of the two members beyond a predetermined maximum extension, the cantilever arm having a first end projecting from said base, said first end being displaceable from said base by telescopic extension of the cantilever arm and said first end being rotatable about said base by the pivotal connection of the cantilever arm to said base;    a seat pivotally attached to said first end of said cantilever arm, said seat being height adjustable, said seat including a back support and a removable knee support; and    a brake extendable from said first end of said cantilever arm and contacting the ground surface such that contact with the ground surface inhibits telescopic and rotational movement of said first end of said cantilever arm relative to said base, said brake activated to contact the ground surface by tilting said seat.    
     
     
         18 . A chair comprising: 
 a base;    an cantilever arm pivotally connected to said base, the cantilever arm having a first end projecting from said base, said first end being rotatable about said base by the pivotal connection of the cantilever arm to said base;    a seat attached to said first end of said cantilever arm; and    a brake attached to said cantilever arm, said brake releasably contacting a ground surface such that contact of said brake with said ground surface inhibits rotation of said first end of said cantilever arm relative to said base.    
     
     
         19 . The chair of  claim 18  wherein said brake is extendable from said cantilever arm.  
     
     
         20 . The chair of  claim 19  wherein said brake is attached to said first end of said cantilever arm.  
     
     
         21 . The chair of  claim 20  wherein said brake is activated to contact the ground surface by tilting said seat.  
     
     
         22 . The chair of  claim 18  wherein said cantilever arm is extendable, such that extension or retraction of said cantilever arm results in displacement of said first end of said cantilever arm relative to said base.  
     
     
         23 . The chair of  claim 22  wherein the cantilever arm is telescopically extendable.  
     
     
         24 . The chair of  claim 23  wherein the telescopically extendable cantilever arm consists of two members and a stop to inhibit movement of the two members beyond a predetermined maximum extension.  
     
     
         25 . A leveler for distancing and securing a base to a supportive surface, the leveler comprising: 
 a first internally threaded sleeve-like female member;    a second externally threaded tubular male member having a shoulder for supporting the base, the second threaded male member mating with the first threaded female member and being rotatable relative to the first threaded member such that rotation of the second threaded member results in axial displacement of the second threaded member with respect to the first threaded member; and    a third member for securing the base to said second member such that the second member remains rotatable when secured to said base by said third member.    
     
     
         26 . The leveler of  claim 25  wherein the second member is internally threaded sleeve-like female member and the third member is externally threaded tubular male member, said third member secures said base to said second threaded member by threaded mating with the second member.  
     
     
         27 . The leveler of  claim 25  wherein the first threaded member has an exterior surface for securable attachment into the supportive surface.  
     
     
         28 . The leveler of  claim 27  wherein said exterior surface of said first threaded member is threaded for securable attachment into the supportive surface.