Fastening device

Fastening device, comprising a first element fixed to a rigid substrate and a second element fixed to an object, wherein said second element is releasably fastened to said first element by way of a snapping part of said first element and a snapping part of said second element,

• and wherein said first and second elements, remote from their respective snapping parts, each have a hooking part
• such that, in order to be mutually snap-fixed to each other, said first and second elements at first have to be mutually engaged under a mutual angle by said respective hooking parts and then have to be pivoted onto each other;
• wherein said object is a stressed foil and the rigid substrate is a ship deck or a window frame;
• and wherein:
• the hooking part of said first element is limited to a single location and comprises a base and a free edge and from its base to its free edge decreases in width;
• the hooking part of said first element has a U or V shape, between the legs of which the hooking part of said second element is configured to be housed;
• both of said hooking parts when viewed from above, have an outermost edge that forms an arc of a circle, such that when said first and second elements are fixed to each other the circles that contain said outermost edges of said hooking parts are substantially concentric;
• the hooking part of said second element extends completely around said second element;
• the hooking part of said second element is part of a hat shaped part of said second element;
• the hooking part of said second element extends obliquely upward to its free edge;
• the hooking part of said second element merges with an upright wall of said second element at its side facing away from its free edge;
• such that when said first and second elements are mutually fastened:
• the hooking parts of said first and second elements can be mutually, limitlessly turned in the plane of the fastener without said first and second elements becoming disengaged;
• and
• said upright wall of said second element extends to above the hooking part of said first element and the free edge of the hooking part of said first element faces said upright wall of said second element with a small gap in between said free edge and said upright wall.

Fastening device, comprising a first element fixed to a rigid substrate and a second element fixed to an object, which second element is releasably fastened to the first element by way of a snapping part of the first element and a snapping part of said second element and wherein said first and second elements remote from their respective snapping parts each have a hooking part such that said first and second elements at first had to be mutually engaged under a mutual angle by the respective hooking parts and then were pivoted onto each other to subsequently be mutually snapped fixed to each other, and wherein:

• the hooking part of said first element is limited to a single location on said first element and comprises a base and a free edge and from its base to its free edge decreases in width;
• the hooking part of said first element has a U shape, between the legs of which the hooking part of said second element is configured to be housed;
• both of said hooking parts when viewed from above have an outermost edge that forms an arc of a circle, such that when said first and second elements are fixed to each other the circles that contain said outermost edges of said hooking parts are substantially concentric;
• the hooking part of said second element extends completely around said second element;
• the hooking part of said second element is part of a hat shaped part of said second element;
• the hooking part of said second element extends obliquely upward to its free edge;
• the hooking part of said the first element provides a retaining action in the directions upward, downward and away from the snapping parts and no retaining action in the direction towards the snapping parts of said first or second elements;
• said snapping part of said first element and said snapping part of said second element are substantially circular when viewed from above;
• and said circles that contain said outermost edges of said hooking parts and said snapping parts of said first and second elements are concentric;
• said snapping part of said second element comprises a resilient part and the snapping part of said first element comprises a narrowing part;
• the hooking parts of said first and second elements are present outside the first and second snapping parts;
• while the first and second elements are mutually fastened, the hooking parts can be mutually, limitlessly turned substantially in the plane of the fastener without the elements becoming disengaged;
• said snapping part of said first element has a part that tightly fits concentrically into a part of snapping part of said second element;
• the hooking part of said second element merges with an upright wall of said second element at its side facing away from its free edge;
• while the first and second elements are mutually fastened said upright wall extends to above the hooking part of the first element;
• the free edge of the hooking part of said first element is present opposite said upright wall, with a small gap of 1 millimeter at the most there between;
• while the first and second elements are mutually fastened, the free edge of the hooking part of said second element keeps a distance from the hooking part of said first element of 1 millimeter at the most.