Patent ID: 9587516
Date: 2017-03-07
CPC Classifications: B64D,E05B,E05C,F01D,Y10T

Claim:
1. A locking system comprising: a handle mounted so as to be rotatable about an operating spindle, wherein the handle can move between a locked position and an unlocked position, a hook mounted on the handle and secured in rotation therewith, wherein the hook has a throat designed and arranged to receive a latching point of a structure when the handle is in the locked position, a key associated with the hook and via which it is possible to pass from the locked position to the unlocked position of the handle, wherein the key can be removed when the handle is in the locked position and cannot be removed when the handle is in the unlocked position, a counter-hook having a counter-throat and being mounted on the handle such that it can move in translation, in a translation direction, between a locked position in which the latching point is sandwiched between the counter-throat and the throat when the handle is in the locked position, an unlocked position in which the counter-throat is remote from the latching point allowing the handle to rotate from the locked position to the unlocked position, and a passing position which is distinct from the locked position and from the unlocked position, and in which the counter-hook occupies a space in which the latching point engages when the handle is in the locked position, a blocking plate mounted on the handle such that it can move in translation, in the translation direction, between a free position in which the blocking plate is in contact against the latching point when the handle is in the locked position, and a blocking position in which the blocking plate occupies a space in which the latching point engages when the handle is in the locked position, wherein the blocking plate comprises a resting recess, a blocking peg mounted on the counter-hook such that it can move in translation, in an unblocking direction, between a resting position in which it is received in the resting recess and an actuation position in which it is not received in the resting recess, and wherein the key is configured so as to engage with the blocking peg so as to cause the blocking peg to pass from the resting position to the actuation position and to cause the counter-hook to pass from the locked position to the unlocked position, and wherein the locking system further comprises a blocking member configured so as to prevent the key from being removed when the blocking peg is in the actuation position and the counter-hook is in the unlocked position, and to allow the key to be removed when the counter-hook is in the locked position.