Chair Controls

Abstract

Various chair controls for enabling motion associated with human support surfaces is disclosed. Furthermore, these new structures adjust, at least in part, automatically to a wide variety of users. The way in which this automatic adjustment occurs, is through the generally, at least in part, vertical displacement of an occupant throughout a range of motion, such as recline, and where this generally, at least in part, vertical displacement accounts for the entirety of an occupants mass regardless of degree of motion and thus degree or amount of generally horizontal displacement while maintaining proper ergonomic relationships.

I claim: 
     
         1 . A chair tilt control assembly to support a potential occupant, the assembly comprising:
 a) A first structure supported by the ground plane;   b) a second structure generally having a front area generally near said potential occupants knees location and a rearward area distal to said front area, where said second structure is vertically translatable relative to said first structure;   c) a third structure defining a support for a seat to support said potential occupant having a front area generally near said potential occupants knees and an area rearward of said front area,   d) a first pivot coupled generally to said front areas of said second structure and said third structure,   e) a fourth structure defining a support for a chair back for supporting a back of said potential occupant,   f) a second pivot coupling said fourth back support structure to said vertically translatable second structure,   g) a third pivot coupling said fourth structure to said third seat support structure   h) and a pry pivot rearward of said first pivot, coupled to said fourth back support structure and said first structure;   i) where when said fourth structure pivots, said second structure is translated vertically carrying said first pivot vertically.   
     
     
         2 . The structure of  claim 1 , where the first pivot is a pivot slide. 
     
     
         3 . The structure of  claim 1 , where said second structure is vertically translatable relative to said first structure by way of slides. 
     
     
         4 . The structure of  claim 1 , where said second structure is vertically translatable relative to said first structure by way of links. 
     
     
         5 . The structure of  1  further including a spring. 
     
     
         6 . The structure of  claim 1  where said pry pivot is a pivot-slide. 
     
     
         7 . The structure of  claim 1 , where said chair tilt control exhibits a multitude of dwell positions. 
     
     
         8 . The structure of  claim 5  where said pry-pivot may be obviated, and the mechanism will still function as a chair tilt control assembly. 
     
     
         9 . A chair tilt control assembly, the assembly comprising:
 a) A first base structure generally coupled to a ground plane;   b) a second carrier structure vertically translatable relative to said first structure;   c) a third seat support structure pivotally coupled to said second carrier structure;   d) a fourth back support structure with a first pry-pivot commonly coupled to said first base structure, a second pivot commonly coupled to said second carrier structure and a third pivot commonly coupled to said third seat support structure,   e) where when said fourth back structure pivots, said second structure is translated vertically carrying at least a portion of said third seat support structure vertically.   
     
     
         10 . The structure of  claim 9 , where the first pivot is a pivot slide. 
     
     
         11 . The structure of  claim 9 , where said second structure is vertically translatable relative to said first structure by way of slides. 
     
     
         12 . The structure of  claim 9 , where said second structure is vertically translatable relative to said first structure by way of links. 
     
     
         13 . The structure of  9 , further including a spring. 
     
     
         14 . The structure of  claim 9 , where said pry pivot is a pivot-slide. 
     
     
         15 . The structure of  claim 9  where said pry-pivot may be obviated, and the mechanism will still function as a chair tilt control. 
     
     
         16 . A chair tilt control assembly to support a potential occupant, the assembly comprising:
 a) a first structure generally coupled to a ground plane;   b) a second structure generally having a front area generally near said potential occupants knees location and a rearward area to said front area defining a back section, where said second structure is vertically translatable relative to said first structure;   c) a third structure which is a commonly joined back and seat structure, or is able to support a commonly joined back and seat structure, where said third structure has a front area generally near an occupants knees and a rearward area to support a users buttocks and has a first pivot of said chair tilt control assembly coupled generally to said front area of said second structure and has rearward of said first pivot a second pry-pivot associated with said third structure and said first structure;   
       where when said third structure, said commonly joined back and seat structure pivots, said second structure is translated vertically carrying at least a portion of said third structure vertically. 
     
     
         17 . The structure of  claim 16 , where said second structure is vertically translatable relative to said first structure by way of slides. 
     
     
         18 . The structure of  claim 16 , where said second structure is vertically translatable relative to said first structure by way of links. 
     
     
         19 . The structure of  claim 16 , where said pry pivot is a pivot-slide. 
     
     
         20 . The structure of  16 , further including a spring where said pry-pivot may be obviated, and the mechanism will still function as a chair tilt control.