US 5,794,463 AGranted

Tamper-proof attachment for cable locks and the like

AssigneeKryptonite Corporation

InventorCornelius McDaid

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Abstract

A cable lock attachment for portable articles that is protected from tampering, whether by twisting or otherwise, when the associated cable lock is operational. The attachment comprises a shell with concentric axial ports, one large and one small, and opposed lateral ports. The small port is in proximity to a threaded socket in the article. A collar having a wide head and narrow stem fits through the large port and the stem fits into the small port with the head remaining inside the shell and the stem abutting the article. The stem is secured to the article by a screw that has an internal hex head. The stem is slightly longer than the thickness of the shell so that the shell is free to swivel about the stem when secured. The cable extends through the lateral ports, preventing access to the screw when the cable lock is secured.

Claims15

Dependent claims

A security attachment for connection to a portable article, said attachment comprising:

(a) a shell having concentric axial ports and opposed lateral ports;
(b) said concentric ports have different diameters, of which the smaller diameter port is to be positioned contiguously with said portable article and the larger diameter port is to be positioned remotely from said portable article;
(c) a collar within said shell;
(d) said collar being shouldered internally and externally to provide a stem of relatively small internal and external diameter, and a head of relatively large internal and external diameter;
(e) said collar fitting through said larger diameter port;
(f) said collar stem fitting through said smaller diameter port for tight contact with said article;
(g) the axial length of said collar stem being greater than the thickness of said shell in the vicinity of said article;
(h) the interior of said shell including a non-planar surface through which said smaller diameter port extends and which axially faces said collar head, and said collar head being of too great diameter to fit through said smaller diameter port and retaining said shell for free swiveling movement about said collar stem;
(i) a screw having a shank and a head;
(j) said shank being adapted to project through said collar and said smaller diameter port;
(k) said head being adapted to abut against said internal shoulder of said collar;
(l) said head having a central notch configured for reception of a tool.

9 more elements

A tether lock assembly comprising a security attachment for connection to a movable object, said attachment comprising a tether, a lock and an attachment, said attachment comprising:

(a) a shell having concentric axial ports and opposed lateral ports;
(b) said concentric ports have different diameters, of which the smaller diameter port is to be positioned contiguously with said object and the larger diameter port is to be positioned remotely from said object;
(c) a collar within said shell;
(d) said collar being shouldered internally and externally to provide a collar stem of relatively small internal and external diameter, and a collar head of relatively large internal and external diameter;
(e) said collar fitting through said larger diameter port;
(f) said collar stem fitting through said smaller diameter port for tight contact with said object;
(g) the axial length of said collar stem being greater than the thickness of said shell in the vicinity of said object;
(h) said collar head being of too great diameter to fit through said smaller diameter port and retaining said shell for free swiveling movement about said collar stem;
(i) a screw having a screw shank and a screw head;
(j) said screw shank being adapted to project through said collar and said smaller diameter port;
(k) said screw head being adapted to abut against said internal shoulder of said collar;
(l) said screw head having a central notch configured for reception of a tool;
(m) said tether being threaded through said lateral ports;
(n) said notch of said screw head being directly shielded from tampering by said tether;
(o) said shell being free for swiveling about said collar because of its freedom from said collar head;
(p) said shell being a spheroid;
(q) said tether being composed of steel strands;
(r) said lock including a lock bolt, a lock body and a key sub-assembly for locking said lock bolt within said lock body;
(s) said lock bolt fitting through said lateral ports of said shell.

16 more elements

Dependencies are inferred from the claim text.