Key with movable plunger, security barrel for said key, and a lock equipped with such a barrel
AssigneeVachette
InventorsJo/e/ l Girard, Norbert Gsell
Life of this patent
Estimating the term…
Abstract
A key comprises a key body provided with at least one translatably movable plunger able to be displaced in a housing provided in the key, the plunger being intended to co-operate with a positioning member provided in the recess of a rotor so as to project from its recess and to push a movable pin of the rotor into a position permitting rotation of the barrel rotor relative to the stator. The key comprises in its head a constricted zone, and the recess of the movable plunger is provided in this constricted zone.
Claims13
In a key for a rotatable security barrel for a lock or bolt, said key comprising:
- (a) a key body, which is intended to enter the barrel rotor;
- (b) recess means in the key body;
- (c) plunger means in the recess means;
- (d) means mounting the plunger means for translational movement of limited amplitude in said recess means, said plunger means being intended to co-operate with a positioning member in the barrel rotor recess, to be driven to project outwardly from said recess means and to push a movable pin of the barrel rotor into a position permitting rotation of the barrel rotor relative to a surrounding stator;
- the improvement wherein the key body comprises a constricted zone at which the recess means for the movable plunger means is provided, and wherein
- the transverse dimensions of said constricted zone and the mounting means for the movable plunger means in said recess means are effective to ensure that when the plunger means projects out of said recess means to the maximum extent possible, said plunger means projects transversely relative to the key body no further than the contour of the transverse cross-section of the rest of the key body.
A security barrel and key for a lock or bolt comprising, in combination,
- a key having a key body;
- a security barrel having a stator and a rotor, said rotor having a recess to receive said key body;
- recess means in the key body;
- plunger means in the recess means of the key body;
- means mounting the plunger means for translational movement of limited amplitude in said recess means;
- cam means in said rotor for displacing said moveable plunger means of the key body from its recess means;
- a movable pin in said rotor positioned to be driven by the moveable plunger means when the moveable plunger means is displaced by said cam means, to release the rotor for rotation relative to said stator, and
- wherein the key body comprises a constricted zone at which the recess means for the movable plunger means is provided, the transverse dimensions of said constricted zone and the mounting means for the movable plunger means in said recess means being effective to ensure that when the plunger means projects out of said recess means to the maximum extent possible, said plunger means projects transversely relative to the key body no further than the contour of the transverse cross-section of the rest of the key body.
Dependencies are inferred from the claim text.