Patent ID: 6416415
Filing Date: 2002-07-09
Classification: F16D,Y10T

Abstract:
A symmetrical joint structure for joining a first joint element and a second joint element together, comprising:a first joint portion provided on said first joint element, comprising two identical first semi-conical engagement tongues symmetrically projecting at two sides thereof so as to define two identical first semi-conical engagement grooves symmetrically indented between said two first semi-conical engagement tongues, wherein said two first semi-conical engagement tongues respectively define two first conically curved tongue surfaces symmetrically facing with each other, and said two first semi-conical engagement grooves respectively define two first conically curved groove surfaces symmetrically and continuously extended between said two first conically curved tongue surfaces so as to form a continuous first joint surface for said first joint portion; and a second joint portion provided on said second joint element, comprising two identical second semi-conical engagement tongues symmetrically projecting at two sides thereof so as to define two identical second semi-conical engagement grooves symmetrically indented between said two second semi-conical engagement tongues, wherein said two second semi-conical engagement tongues respectively define two second conically curved tongue surfaces symmetrically facing with each other, and said two second semi-conical engagement grooves respectively define two second conically curved groove surfaces symmetrically and continuously extended between said two second conically curved tongue surfaces so as to form a continuous second joint surface for said second joint portion; wherein, a cone height of each of said first and second semi-conical engagement tongues is equal to a cone height of each of said first and second semi-conical engagement grooves and thus said size and shape of said first joint portion and said second joint portion are identical and symmetrical, so that said two second semi-conical engagement tongues are fittingly engaged in said two first semi-conical engagement grooves respectively while said two first semi-conical engagement tongues are fittingly engaged in said two second semi-conical engagement grooves respectively, so as to integrally united said first joint portion and said second joint portion together to form said symmetrical joint structure.