Folding Chair with Bulbous Chair Adjustment Mechanism

Abstract

A folding chair with a bulbous chair adjustment mechanism. A chair back support frame pivotally attached to seat support frame covered with user support fabric or webbing. The X-frame chair has pivotal forward and rearward leg frames. A terminal vertical fore-leg end has a bulbous cap thereon. Armrest frames pivot on back support frame and the adjustment mechanism includes the bulbous cap and a yoke (stem and tines). The stem pivots on the armrest. The tines pivot on the bulbous cap and fore-leg end. The bulbous cap encloses the U-shaped tine space and substantially fills the U-shaped space such that armrest rotation relative to the forward leg frame causes yoke to swing forward and rearward and move back support frame up-and-back. The cap enclosed U-shaped tine space avoids finger pinch.

What is claimed is: 
     
         1 . In combination with a folding beach chair adapted for use by a seated person, a bulbous chair adjustment mechanism, the beach chair having a back support frame upon which is mounted a flexible back support for said seated person, a seat support frame which upon which is mounted a flexible seat for said seated person, said seat support frame hinged to said back support frame, a forward leg frame having at least one substantially vertical first member pivotally attached at an intermediate location between a ground plane and a terminal vertical fore-leg end to said seat support frame, a rearward leg frame having at least one substantially vertical second member pivotally attached at an intermediate location between a ground plane and a terminal vertical rear-leg end to one or the other or both said seat support frame and said back support frame, and at least one arm rest frame having a free terminal end and an opposing rear end pivotally coupled to said back support frame, the bulbous chair adjustment mechanism comprising:
 a bulbous cap attached to said terminal fore-leg end;   a partly rotatable yoke element having a stem and opposing yoke tines, said stem pivotally coupled to said arm rest frame at an intermediate location, said yoke tines pivotally coupled to said bulbous cap and said terminal fore-leg end such that the bulbous cap encloses the spaced apart yoke tines;   whereby rotation of said arm rest frame relative to said forward leg frame causes said yoke to swing forward and rearward and move said back support frame relative to said seat support frame.   
     
     
         2 . The combination of the folding beach chair and the bulbous chair adjustment mechanism as claimed in  claim 1  wherein said yoke tines are substantially U-shaped with parallel spaced apart tine legs defining a U-shaped space and said bulbous cap is crossectionally sized to substantially fill said U-shaped tine space. 
     
     
         3 . The combination of the folding beach chair and the bulbous chair adjustment mechanism as claimed in  claim 2  wherein said bulbous cap has a rounded pillow shape extending vertically above said yoke tines. 
     
     
         4 . The combination of the folding beach chair and the bulbous chair adjustment mechanism as claimed in  claim 3  wherein said yoke is a single, integral component made of plastic. 
     
     
         5 . The combination of the folding beach chair and the bulbous chair adjustment mechanism as claimed in  claim 4  wherein said stem has a yoke terminal end which is pivotally attached to said arm rest frame. 
     
     
         6 . The combination of the folding beach chair and the bulbous chair adjustment mechanism as claimed in  claim 5  wherein said tines and said stem are disposed in a single plane which rotates about the conjoined yoke and arm rest frame pivot. 
     
     
         7 . The combination of the folding beach chair and the bulbous chair adjustment mechanism as claimed in  claim 6  wherein said terminal vertical rear-leg end abuts said arm rest frame and forms a stop for said yoke at either end of rotation about said yoke and arm rest frame pivot. 
     
     
         8 . A folding chair with a bulbous chair adjustment mechanism comprising:
 a back support frame upon which is mounted a flexible back support adapted to support a back of a seated person;   a seat support frame which upon which is mounted a flexible seat for said seated person, said seat support frame hinged to said back support frame;   a forward leg frame having at least one substantially vertical first member pivotally attached at an intermediate location between a ground plane and a terminal vertical fore-leg end to said seat support frame;   a rearward leg frame having at least one substantially vertical second member pivotally attached at an intermediate location between a ground plane and a terminal vertical rear-leg end to one or the other or both said seat support frame and said back support frame;   at least one arm rest frame having a free terminal end and an opposing rear end pivotally coupled to said back support frame;   a chair adjustment mechanism with a bulbous cap and a yoke;   said bulbous cap attached to said terminal fore-leg end;   said yoke having a stem and opposing yoke tines, said stem pivotally coupled to said arm rest frame at an intermediate location;   said yoke tines pivotally coupled to said bulbous cap and said terminal fore-leg end such that the bulbous cap encloses the spaced apart yoke tines;   whereby rotation of said arm rest frame relative to said forward leg frame causes said yoke to swing forward and rearward and move said back support frame relative to said seat support frame.   
     
     
         9 . The folding chair with a bulbous chair adjustment mechanism as claimed in  claim 8  wherein said yoke tines are substantially U-shaped with parallel spaced apart tine legs defining a U-shaped space and said bulbous cap is crossectionally sized to substantially fill said U-shaped tine space. 
     
     
         10 . The folding beach chair with a bulbous chair adjustment mechanism as claimed in  claim 9  wherein said bulbous cap has a rounded pillow shape extending vertically above said yoke tines. 
     
     
         11 . The folding beach chair with a bulbous chair adjustment mechanism as claimed in  claim 10  wherein said yoke is a single, integral component made of plastic. 
     
     
         12 . The folding beach chair with a bulbous chair adjustment mechanism as claimed in  claim 11  wherein said stem has a yoke terminal end which is pivotally attached to said arm rest frame. 
     
     
         13 . The folding beach chair with a bulbous chair adjustment mechanism as claimed in  claim 12  wherein said tines and said stem are disposed in a single plane which rotates about the conjoined yoke and arm rest frame pivot. 
     
     
         14 . The folding beach chair with a bulbous chair adjustment mechanism as claimed in  claim 13  wherein said terminal vertical rear-leg end abuts said arm rest frame and forms a stop for said yoke at either end of rotation about said yoke and arm rest frame pivot. 
     
     
         15 . The folding beach chair with a bulbous chair adjustment mechanism as claimed in  claim 9  wherein stem has a yoke terminal end which is pivotally attached to said arm rest frame. 
     
     
         16 . The folding beach chair with a bulbous chair adjustment mechanism as claimed in  claim 15  wherein said tines and said stem are disposed in a single plane which rotates about the conjoined yoke and arm rest frame pivot. 
     
     
         17 . The folding beach chair with a bulbous chair adjustment mechanism as claimed in  claim 16  wherein said terminal vertical rear-leg end abuts said arm rest frame and forms a stop for said yoke at either end of rotation about said yoke and arm rest frame pivot. 
     
     
         18 . The folding beach chair with a bulbous chair adjustment mechanism as claimed in  claim 9  wherein stem has a yoke terminal end which is pivotally attached to said arm rest frame and wherein said terminal vertical rear-leg end abuts said arm rest frame and forms a stop for said yoke at either end of rotation about said yoke and arm rest frame pivot. 
     
     
         19 . The folding beach chair with a bulbous chair adjustment mechanism as claimed in  claim 8  wherein said bulbous cap completely encloses and fills in the space between said rotatably mounted yoke tines to avoid finger pinch accidents. 
     
     
         20 . A folding beach chair with a bulbous chair adjustment mechanism comprising:
 a back support frame upon which is mounted a flexible back support adapted to support a back of a seated person;   a seat support frame which upon which is mounted a flexible seat for said seated person, said seat support frame hinged to said back support frame;   a forward leg frame having at least one substantially vertical first member pivotally attached at an intermediate location between a ground plane and a terminal vertical fore-leg end to said seat support frame;   a rearward leg frame having at least one substantially vertical second member pivotally attached at an intermediate location between a ground plane and a terminal vertical rear-leg end to one or the other or both said seat support frame and said back support frame;   at least one arm rest frame having a free terminal end and an opposing rear end pivotally coupled to said back support frame;   a chair adjustment mechanism with a bulbous cap and a yoke;   said bulbous cap attached to said terminal rear-leg end;   said yoke having a stem and opposing yoke tines, said stem pivotally coupled to said arm rest frame at an intermediate location;   said yoke tines pivotally coupled to said bulbous cap and said terminal fore-leg end such that the bulbous cap encloses the spaced apart yoke tines;   whereby rotation of said arm rest frame relative to said rearward leg frame causes said yoke to swing forward and rearward and move said back support frame relative to said seat support frame.