초록 ▼

The device comprises a stopper having an operating head (10), an intermediate portion (12) bearing a sealing ring, and a tail (14) formed with radial ribs which co-operate with slopes in the orifice in which the stopper is to be mounted, a portion (30) of said radial ribs being obliquely oriented so

The device comprises a stopper having an operating head (10), an intermediate portion (12) bearing a sealing ring, and a tail (14) formed with radial ribs which co-operate with slopes in the orifice in which the stopper is to be mounted, a portion (30) of said radial ribs being obliquely oriented so that rotation of the stopper about its axis gives rise to longitudinal translation along said axis. The invention is particularly applicable to devices for bleeding or for emptying the radiators of motor vehicles.

대표청구항 ▼

A device for bleeding or draining a heat exchanger, such as radiator for a motor vehicle, the device comprising a removable stopper suitable for closing in sealed manner an orifice formed in the wall of the heat exchanger water box, the stopper comprising means defining a limit stop for a closed or

A device for bleeding or draining a heat exchanger, such as radiator for a motor vehicle, the device comprising a removable stopper suitable for closing in sealed manner an orifice formed in the wall of the heat exchanger water box, the stopper comprising means defining a limit stop for a closed or open position, an operating head, and a tail formed with diametrically opposite radial ribs, said ribs following limited angular sectors and comprising a first portion parallel to the axis of the stopper tail and a second portion perpendicular to said axis, the radially inside edge of the orifice being formed with diametrically opposite radial notches defining plane projections therebetween suitable for co-operating with the radial ribs on the stopper tail in order to hold it in its orifice closure position, the device including the improvement whereby each radial rib on the stopper tail includes a third portion extending obliquely or helically around the axis towards the free end of the stopper tail from said second portion of the rib, and constituting a sloping ramp suitable for co-operating with a radial side of a projection from the edge of the orifice in order to displace the stopper in translation along its axis when it is rotated about said axis from its position in which it closes the orifice in sealed manner and means directly extending from the third portion for retaining association of said stopper with said heat exchanger and for controlling the bleeding or draining of the heat exchanger.