Device for mounting a seat on a mounting rail

1. A device for mounting a seat on a mounting rail, said rail comprising a back wall, two lateral walls and two wings that delimit a groove in the shape of an inverted T, said wings forming notches at regular intervals that define widened and narrowed sections of a passage in between edges of the wings, said device comprising:

a base, a sliding nut, a control lever, and a locking means; wherein

the base comprises a band operable for linking to the seat, the groove adapted to receive a guide rail, and a longitudinal blocking piston operably insertable into one of said widened sections of the mounting rail such that the piston is restrained longitudinally from entering one of said narrowed sections, said base being releasably secured to said mounting rail;

the sliding nut comprises protrusions that form lateral lips, and the guide rail insertable into said groove of the base, said sliding nut being arranged so as to slide in relation to said base when said base is releasably secured to said mounting rail with said protrusions placed in said mounting rail, in between an installation position and a blocked position, such that:

in said installation position, when the piston of the base is in one of said widened sections, the lips of the sliding nut can be inserted in one of such widened sections, and

in said blocked position, the lips of the sliding nut are held by said wings in one of said narrowed sections;

the control lever is hinged to said base and said sliding nut, so as to cause said lever to move in between an open position and a closed position in relation to said installation position and said blocked position of the sliding nut; and

the locking means is operable to lock said lever in its closed position.

2. A device according to claim 1 , further comprising a compressable support for compensating for play that exists between the mounting rail and the device when the sliding nut passes from said installation position to said blocked position.

3. A device according to claim 2 , wherein said compressable support comprises a flexible stop for a sliding pin.

4. A device according to claim 3 , wherein said flexible stop is arranged in one of said widened sections at the end of an elongated slot in which said sliding pin slides when said sliding nut reaches said blocked position.

5. A device according to claims 1 , 2 , 3 , or 4 wherein said locking means comprise a spring plate operably connected on the base and capable of cooperating with a hook solidly attached to the control lever.

6. A device according to claims 1 , 2 , 3 , or 4 , or, further comprising unlocking means operable to unlock said lever from its closed position.

7. A device according to claims 1 , 2 , 3 , or 4 , further comprising unlocking means operable to unlock said lever from its closed position, wherein said unlocking means comprise a cam which, in one of its positions, allows a spring plate to rest against the bottom of a hook, and in another position, pushes the spring plate back out of the hook.

8. A device according to claims 1 , 2 , 3 or 4 further comprising unlocking means operable to unlock said lever from its closed position; wherein said unlocking means comprise a cam which, in one of its positions, allows a spring plate to rest against the bottom of a hook, and in another position, pushes the spring plate back out of the hook; wherein a cam is eccentric and capable of being driven in rotation between said one of its positions and said another position with the help of a spanner.