Fixing device for fixing a seat to a vehicle floor, and a seat equipped with such a fixing device

A fixing device for fixing a seat to a vehicle floor, the seat having a seat proper which extends between a front end and a rear end, and the device comprising firstly a base designed to support the seat proper and which extends horizontally between a front end and a rear end, and secondly a rear coupling and a front coupling that are secured to the base, the front coupling comprising:

• an anchoring fork provided firstly with a first notch designed to co-operate with a rear rod secured to the floor when the seat proper is in an in-use position in which the rear coupling co-operates with fixing means on the floor to hold the seat proper substantially horizontal, and secondly with a second notch designed to co-operate with a front rod secured to the floor when the seat proper is in a tilted-forwards position in which the rear coupling no longer co-operates with the fixing means on the floor so as to allow the seat proper to be inclined relative to the horizontal;
• and
• first and second hooks mounted on the anchoring fork to move between an unlocked position and a locked position in which said first hook and said second hook respectively co-operate with the first notch and the second notch to form first and second closed recesses, the rear rod and the front rod being held captive respectively in the first closed recess and in the second closed recess when the seat is in the tilted-forwards position;
• wherein the first hook is adapted to be in its locked position while holding the rear rod captive in the first closed recess when the seat proper is put in place on the floor of the vehicle, and when the seat proper is in the tilted-forwards position and in the in-use position, and wherein the seat proper pivots about the rear rod only, between its tilted-forwards position and its in-use position.