Headstand assisting implement

Abstract

A headstand assisting implement for assisting an intended user while the latter performs a headstand includes an implement body defining a ground contacting surface for resting on a ground surface and a substantially opposed cranium contacting surface for contacting the cranium of the intended user. The cranium contacting surface is provided with a cranium receiving concavity configured and sized for substantially fittingly receiving a predetermined portion of the cranium of the intended user so as to ergonomically support the cranium of the intended user when the intended user performs the headstand.

1 . A headstand assisting implement for assisting an intended user while said intended user performs a headstand, said intended user having a head including a cranium, said headstand assisting implement comprising: 
 an implement body, said implement body defining a ground contacting surface for resting on a ground surface and a substantially opposed cranium contacting surface for contacting said cranium of said intended user;    said cranium contacting surface being provided with a cranium receiving concavity, said cranium receiving concavity being configured and sized for substantially fittingly receiving a predetermined portion of said cranium of said intended user so as to ergonomically support said cranium of said intended user when said intended user performs said headstand.    
     
     
         2 . A headstand assisting implement as recited in  claim 1  wherein said cranium receiving concavity has a substantially ovoid configuration when seen from a top view, said ovoid configuration of said cranium receiving concavity defining a concavity long axis extending substantially longitudinally across said cranium receiving concavity and a substantially perpendicular concavity short axis extending transversally across said cranium receiving concavity, said concavity long and short axes being sized so that the outline of said cranium receiving concavity corresponds substantially to the outline of said predetermined portion of said cranium of said intended user.  
     
     
         3 . A headstand assisting implement as recited in  claim 2  wherein said concavity long axis has a value of approximately between 12.5 cm and 14 cm and said concavity short axis has a value of approximately between 10 cm and 11.2 cm.  
     
     
         4 . A headstand assisting implement as recited in  claim 1  wherein said cranium receiving concavity is configured and sized for substantially fittingly accommodating said predetermined portion of said cranium of an intended user having anthropometric parameters located between that of the fifth and ninety fifth percentile of human craniums.  
     
     
         5 . A headstand assisting implement as recited in  claim 2  wherein said cranium receiving concavity has a substantially flattened parabolic configuration when seen in a longitudinal cross-section taken about said oval long axis.  
     
     
         6 . A headstand assisting implement as recited in  claim 1  wherein said cranium receiving concavity defines a concavity main section and a concavity auxiliary section, said concavity main section being located substantially centrally relative to said cranium receiving concavity; said concavity auxiliary section being located peripherally relative to said concavity main section, the radius of curvature of said concavity auxiliary section being greater then the radius of curvature of said concavity main section.  
     
     
         7 . A headstand assisting implement as recited in  claim 6  wherein the concavity main section has a main section radius of curvature and the concavity auxiliary section has an auxiliary section radius of curvature, the main section radius of curvature has a value of approximately between 20 and 22 centimetres and the concavity auxiliary section radius of curvature has a value of approximately between 3.6 and 5.1 centimetres.  
     
     
         8 . A headstand assisting implement as recited in  claim 6  wherein said concavity main section has a substantially ovoid configuration, said ovoid configuration of said concavity main section defining a main section long axis extending substantially longitudinally across said concavity main section and a substantially perpendicular main section short axis extending substantially transversally across said concavity main section.  
     
     
         9 . A headstand assisting implement as recited in  claim 8  wherein said main section long axis has a value of approximately between 12.5 cm and 14 cm and said main section short axis has a value of approximately between 10 cm and 11.2 cm.  
     
     
         10 . A headstand assisting implement as recited in  claim 6  wherein said concavity main section is hollow.  
     
     
         11 . A headstand assisting implement as recited in  claim 6  wherein at least a portion of said concavity main section and said concavity auxiliary section are made out of different materials.  
     
     
         12 . A headstand assisting implement as recited in  claim 6  wherein at least a portion of said concavity main section is made out of a material having lower modulus of elasticity then that from which said concavity auxiliary section is made.  
     
     
         13 . A headstand assisting implement as recited in  claim 6  wherein at least a portion of said concavity main section is made out of a material having a modulus of elasticity of approximately between 100 and 400 kPA and at least a portion of said concavity auxiliary section is made out of a material having a modulus of elasticity of approximately between 10 and 40 kPA.  
     
     
         14 . A headstand assisting implement as recited in  claim 1  wherein said cranium receiving concavity has a concavity peripheral edge, the level difference between said concavity peripheral edge and the nadir of said cranium receiving concavity defining a concavity depth, said concavity depth having a value of between 1.6 cm and 1.8 cm.  
     
     
         15 . A headstand assisting implement as recited in  claim 1  wherein the distance between the nadir of said cranium receiving concavity and said ground contacting surface defines a body minimal thickness, said body minimal thickness having a value of approximately between 0.635 cm and 1.0 cm.  
     
     
         16 . A headstand assisting implement as recited in  claim 1  wherein said cranium receiving concavity has a concavity peripheral edge, said concavity peripheral edge having a substantially rounded configuration, the radius of curvature of said concavity peripheral edge having a value of approximately between 0.3 cm and 0.5 cm.  
     
     
         17 . A headstand assisting implement as recited in  claim 1  wherein said implement body includes a body peripheral surface extending between said concavity peripheral edge and said ground contacting surface, said body peripheral surface tapering generally inwardly in a direction leading from said ground contacting surface to said concavity peripheral edge.  
     
     
         18 . A headstand assisting implement as recited in  claim 17  wherein said body peripheral surface extends at a peripheral-to-ground contacting surface angle relative to said ground contacting surface, said peripheral-to-ground contacting surface angle having a value of approximately between 65 degrees and 90 degrees.  
     
     
         19 . A headstand assisting implement as recited in  claim 1  wherein said implement body is made out of an integral piece of substantially resiliently deformable body material.  
     
     
         20 . A headstand assisting implement as recited in  claim 19  wherein said body material is a urethane gel.