Coupling device

  • US 5,382,109 A
  • Filed: 07/29/1992
  • Issued: 01/17/1995
  • Est. Priority Date: 07/29/1992
  • Status: Expired due to Term
First Claim
Patent Images

1. A coupling device for pivotally securing and releasing structure to each other, and comprising:

  • a. mating male and female coupling members;

    b. the male coupling member having a generally convex surface;

    c. the female coupling member comprising a concave cavity defined by a stationary inner element and a pivotally supported, apertured, plate-like outer element,i. said inner element being provided with an internal cavernous surface portion generally conforming to the convex surface of the male coupling member, said inner element being further provided with an external, outwardly extending flanged area surrounding the cavernous surface portion, andii. said outer element comprising a lock plate of generally planar configuration and defining inner surface and an outer surface, said lock plate including an aperture and being pivotally slidable with respect to the flanged surface said inner element, and wherein said lock plate aperture is normally coaxial with the axis of the cavernous surface portion of said inner element and displacable to a locked position upon pivotal movement of said lock plate, and wherein a defining marginal surface of the lock plate aperture is tapered and is continuous and uninterrupted to provide a constricted area at its inwardly facing surface and being distended at the outwardly facing surface;

    A) wherein entrance of the male coupling member into the concave cavity is facilitated by means of guided initial contact with the distended and tapered lock plate aperture, andB) wherein disengagement of the coupledmembers is prevented by engagement of a said inwardly facing surface of the lock plate with said male coupling member.

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