Patent ID: 8365558

Claim:
A handcuff for gripping a member comprising : a first half-bracelet pivotable about a first axis, a second half-bracelet configured to close with the first half-bracelet around the member, a locking mechanism including a sensor configured to block opening of the first half-bracelet and the second half-bracelet in response to application of pressure from the member against the sensor after closure of the first and second half-bracelets, a wheel turning freely around a third axis fixed at an end of the second half-bracelet such that turning movement of the wheel prevents the second half-bracelet from getting caught on clothing or skin, and an opening mechanism configured to open the first half-bracelet relative to the second half-bracelet in absence of the member applying pressure to the sensor, wherein the sensor is configured to disable a manual control and to block opening of the first and second half-bracelets only when the member is between the first and second half-bracelets, so that the handcuff can be opened with the manual control and without a key when there is no member between the first and second half-bracelets.