Flat-bladed key
AssigneeAssa Abloy High Security Group Inc.
InventorsPeter H. Field, Glenn Hartman
Life of this patent
Estimating the term…
Abstract
A cylinder lock with a rotating tumbler pin, a sidebar, and a slider has a keyway with a ward projection into the center of the bitting area of a key blade received by the keyway. The tip of each rotating tumbler pin seats on the bitting surfaces remaining to the sides of this center ward of the key, and the tumbler pins that are engaged by the bitting on the side of the key blade do not seat on more than half of the width of the blade. Half the pin width is removed from each tumbler pin near the tip thereof. The key has a bitted section at which one or more bittings are formed and a non-bitted section bitting that is devoid of bitting. The bittings extend at a constant depth to an edge of the key blade.
Claims25
A key comprising:
- a blade having a first side and an opposed second side, the first and second sides extending between opposed edges of the blade and defining a width of the blade;
- the edges defining a thickness of the blade which is smaller than the width of the blade;
- wherein the width of at least one of the first and second sides is divided into a bitted section having one or more bittings formed thereon, the one or more bittings being configured to engage one or more tumbler pins of a cylinder lock to elevate and/or rotate each tumbler pin in a direction non-parallel to a longitudinal axis of the blade, and a non-bitted section that is devoid of any bittings formed thereon;
- wherein each bitting in the bitted section of the blade extends at a constant depth through one edge of the blade;
- and
- warding features formed on the at least one side for cooperating with corresponding warding features of a keyway configured to receive the key.
A key comprising:
- a blade having a first side and an opposed second side, the first and second sides extending between opposed first and second edges of the blade;
- one or more bittings formed on at least one of the first and second sides and configured to engage one or more tumbler pins of a cylinder lock to elevate and/or rotate each tumbler pin, wherein each bitting formed on the first and second sides extends at a constant depth through one edge of the blade;
- and
- slider bitting formed on at least one of the first and second edges of the blade and configured to contact a slider within a cylinder lock and to move the slider from a first position to a second position as the blade is advanced into a keyway of the lock, wherein the slider bitting comprises a ridge disposed along and projecting from one of the opposed edges of the blade.
Dependencies are inferred from the claim text.