The invention relates to a crown head for a timepiece, comprising a cap, a tube which is designed to be secured in a case of the timepiece, and a central pipe which is designed to be engaged with the tube, the central pipe and the cap forming an assembly which can be placed in different axial positions relative to the tube, the crown head also comprising a safety valve comprising a discharge channel which is designed to be able to be in fluid communication with the inside of the case when the valve is in an open configuration, in order to discharge excess fluid, the said safety valve also comprising a piston fitted inside the central pipe and an elastic member designed to cooperate with the piston, which is configured to be displaced axially according to the pressure variations inside the case, the crown head also comprising blocking means which prevent separation of the cap and the tube. The blocking means are in the form of a shoulder arranged on the inner wall of the tube, and comprise a support surface against which part of the piston can abut, and in the form of a rim which is provided at the base of the central pipe, and is designed to abut against a shoulder provided on the piston.

A safety valve for a watch including a head that is movably mounted on a tube and able to move between an open position and a closed position, the tube including in its internal volume a first spring and wherein the tube is provided on an external face with a cam surface allowing a manual movement and an automatic movement of the head into its open position, after the first spring, the tube includes a second spring having a higher stiffness than that of the first spring.

A crown for timepieces which has improved sealing regardless of its position. To achieve this, the crown includes a tube; a cap including a cover and an axial skirt; a sealing gasket disposed between the screwed or pressed-in tube and the axial skirt of the cap; a pipe fixed to the cap, the pipe and the cap forming an assembly able to be placed in different axial positions relative to the screwed or pressed-in tube; wherein the crown further includes a guide ring integral with one end of the screwed or pressed-in tube, the guide ring including a bearing surface arranged to exert an axial pressure on the sealing gasket in one of the axial positions of the cap.

A crown for timepieces which has improved sealing regardless of its position. To achieve this, the crown includes a tube; a cap including a cover and an axial skirt; a sealing gasket disposed between the screwed or pressed-in tube and the axial skirt of the cap; a pipe fixed to the cap, the pipe and the cap forming an assembly able to be placed in different axial positions relative to the screwed or pressed-in tube; wherein the crown further includes a guide ring integral with one end of the screwed or pressed-in tube, the guide ring including a bearing surface arranged to exert an axial pressure on the sealing gasket in one of the axial positions of the cap.

The invention relates to a screw-down orientable crown comprising a cover integral with a tube and receiving a distinctive sign, a fixed body pressed into a watch case middle and intended to receive the tube, and means for adjusting the angular orientation of the cover with respect to the case middle. According to the invention, the means for adjusting the angular orientation of the cover comprise a ring arranged to be screwed onto the tube, said ring comprising first indexing means arranged to cooperate with second indexing means formed in the body, the ring being pressed in and positioned on the body via the first and second indexing means.

The present invention improves the weathering performance of a stopper structure preventing inadvertent rotation or a rotated body accommodated in a case. An operation member having a head portion rotated outside the case and a shaft portion inserted into a pipe so as to be movable between a first position and a second position that is outer than the first position. A stopper structure is provided inside the case to prevent rotation of the head portion when the operation member is positioned at the second position, whereas the stopper structure allows rotation of the head portion when the operation member is positioned at the first position.

A pressure-relief valve (1) including: a tube (2) intended to be fastened to a watch case, a recessed head (3) mounted movable in rotation and in translation about and along the axis of the tube (2), the head (3) being able to adopt a first axial position where a gas flow could be performed between the inside and the outside of the watch case and a second axial position where this gas flow is prevented, a first insert (4) mounted within the recess of the head (3), the valve (1) being wherein the head (3) is mounted on the tube (2) via the first insert (4) and wherein the head (3) is fastened to said first insert (4) by a screw thread and/or a glue.

The control device (1) for a timepiece has a body (4) intended to rotate about a rotation axis (X) in a case middle (2) of a timepiece to drive a mechanism of the timepiece, and a crown head (5) movable in translation relative to the body, parallel to the rotation axis, between a first position and a second position. The body has a first coupling (46) and the crown head has a second coupling (53), arranged so that in the first position, the body and the crown head are uncoupled, and in the second position, the body and the crown head are coupled. The control device has a first formation (47A) and a second formation (47B), and a locking element able to cooperate with the first formation to stabilize the first position, and with the second formation to stabilize the second position.