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US 5,359,870 AGranted
Key chain
AssigneeSeil-und Netztechnik Reutlinger GmbH
InventorWolf Reutlinger
Life of this patent
Estimating the term…
Abstract
A key chain including a base body, an attachment element, such as a rope, nylon cord, or the like, for attaching at least one key to the base body, and two locking devices located inside of the base body for securing clamping and free ends of the attachment element against axial displacement.
Claims2
A key chain comprising a base body;
- at least one attachment element for attaching at least one key to said base body and having a clamping end and a free end;
- and locking means received within said base body for fastening said at least one attachment element to said base body, said locking means including at least two locking devices for securing said clamping end and said free end of said at least one attachment element, respectively, against axial displacement;
- wherein said at least one attachment element is one of a rope and a nylon cord;
- wherein one of said two locking devices comprises a pull-responsive clamping lock including self-locking in a pull direction means for retaining said clamping end of said one of a rope and a nylon cord, and another of said two devices comprises a nipple provided with a bevel for retaining said free end of said one of a rope and a nylon cord fixed to said nipple;
- wherein said self-locking means comprises a displaceable tubular ball cage having a truncated conical tubular portion with a plurality of radial openings formed therein for receiving a corresponding plurality of balls, a cone socket surrounding said ball cage and having an inner surface, and a spring for biasing said ball cage in the pull direction to put said clamping lock in a locking condition thereof, said plurality of balls in the locking condition of said clamping lock firmly engaging said inner surface of said cone socket and said clamping end of said one of a rope and a nylon cord;
- wherein said spring is formed as a volute helical spring;
- and
- wherein said base body has a bore having a first portion for receiving said clamping lock and a second reduced diameter portion for receiving said nipple, said bore having a bottom defining said second portion and provided with a bevel cooperating with said bevel of said nipple for retaining said free end of said one of a rope and a nylon cord, said ball cage having a tubular projection extending inward in said base body, said volute spring having a small diameter end supported on said tubular projection of said ball cage and a large diameter end engaging said bevel of said bottom of said bore.
5 more elements
Dependencies are inferred from the claim text.