Creanova Ag

Firma Creanova Ag

Louis A Krawagna

A rotary cover for closing the axial opening of a hollow-cylindrical body, a rotary cap and said body having corresponding cam threads, which cause an axial displacement of the rotary cap relative to the body when the rotary cap is rotated. Axial sides of the rotary cap and of the body, which face each other, extend in a plane inclined by a specific angle .alpha. relative to the axis of the body. These axial sides of the rotary cap and of the body are in alignment with each other in the closed position of the rotary cover.

Rotary cover for closing the axial opening of a hollow-cylindrical body

A bi-stable hinge unit (10) of elastic material connects two inflexible end portions (12, 13) to take up two stable positions on either side of an intermediate unstable position. The hinge unit (10) comprises two equal elements (14, 15), each of which having two cantilever arms (18, 20), linked to each other by two folding lines (22) acting as a 'living' hinge. A triangular rigid plate (16) is arranged between and defined by said folding lines (22). The elements (14, 15) are arranged substantially parallel to each other with a distance therebetween and forming the main hinge line between said end portions (12, 13). By swinging the end portions (12, 13) toward each other along the main hinge line, the four cantilever arms (18, 20) will start to deflect and act as springs and the two triangular plates (16) will rotate through approximately 180.degree. in a plane normal to the elements (14, 15).

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Toronto, Canada

Louis A Krawagna