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US 4,412,368 AGranted
Safety-pins
AssigneeNewey Goodman Limited
InventorPaul H. Springer
Life of this patent
Estimating the term…
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AssigneeNewey Goodman Limited
InventorPaul H. Springer
Estimating the term…
A safety-pin is provided with a sheath (16;33) that fits over the cap (12;28) of the pin and can be slid between a release state and a locking state. During assembly the sheath is slid onto the cap and then at least one lug (21A,21B;38) on the sheath is bent to prevent subsequent removal of the sheath, and another deformable part (22A,22B;39)of the sheath is deformed to engage the cap sufficiently tightly as to prevent unwanted movement of the sheath. The sheaths can be slid onto the caps in either of two different ways and have redundant lugs (20A,20B;37) and deformable parts (23A,23B) so arranged that whichever way a sheath is oriented relatively to the cap, it has a lug or lugs and a deformable part suitably positioned for deformation. The sheaths are therefore fitted to the caps randomly orientated. The cap may be single-sided (28) or double-sided (12).
Blocking means for preventing unintentional opening of a safety pin of the type having a first limb to one end of which is affixed a cap having a recess opening in the direction of that limb and a second limb resiliently fixed to the first limb and movable to and from a position wherein an end portion of the second limb is received and resiliently retained within the recess within said cap, said blocking means comprising a substantially U-shaped sheath having first and second inwardly facing recessed sides of a size to be slidingly received over said cap, a pair of lugs one on each of the sides of said sheath, said lugs being deformable and so positioned that irrespective of the intitial orientation of a sheath relative to said cap when the sides of said sheath are first slid over said cap one of said lugs is always located relative to the recess of said cap for deformation to provide retaining means for preventing separation of said sheath from said cap.
Blocking means for preventing unintentional opening of a safety pin of the type having a first limb to one end of which is affixed a cap having a recess opening in the direction of that limb and a second limb is received and resiliently retained within the recess within said cap said cap being so shaped as to permit said end portion of the second limb to enter the recess from either side of the cap at will, said cap including a tongue projecting into or close to the mouth of the recess from a part of the cap facing the recess, said sheath comprising a top portion of inverted channel shape, a first end portion depending from one end of the top portion, and a second end portion depending from the other end of the top portion, the two end portions each being of channel-like shape, with the channels opening towards each other, each said end portion having two lugs, one on each face of each said end portion, and two deformable parts, one on each face of each said end portion, the two lugs on that end portion adjacent to the recess of said cap being bent inwards to form restraining means, and the deformable parts on the end portion adjacent to the base of said tongue being pinched inwards to form restraining means, said lugs and said deformable parts being located on said sheath that two of said lugs and two of said deformable parts are always located for said bending and pinching respectively regardless of the initial orientation of said sheath relative to said cap.
Dependencies are inferred from the claim text.