Safety cap for a liquid reservoir for a motor vehicle
AssigneeIllinois Tool Works Inc.
InventorDominique VAGINET
Life of this patent
Estimating the term…
Abstract
A safety cap (10), for a motor vehicle fluid reservoir (14), is configured to be attached and fixed to a neck (12) of the reservoir. The cap includes a screwing cover (16) with a first screw thread (16ba), and a safety cell (18) configured to allow passage of gas between the interior and the exterior of the reservoir, when the cap is fixed to the neck and when a pressure difference between the interior and the exterior of the reservoir is greater or less than at least one predetermined threshold value. The cap includes a ring (20) with structure (30, 30a, 32) for fixing to the neck and a second screw thread (22) to cooperate with the first screw thread. The cell is at least partly housed in the neck and surrounded by the cover and/or the ring when the cap is fixed on the neck.
Claims26
An assembly comprising:
- a fluid reservoir (14, 114), for a motor vehicle, and a cap (10, 110),
- said reservoir comprising a neck (12, 112) equipped with a screw thread (22, 122, 222),
- said cap comprising a screwing cover (16, 116) comprising a screw thread (16ba, 116ba), and a safety cell (18, 118) configured to allow the passage of gas between an interior of the reservoir and an exterior of the reservoir, when the cap is screwed onto said neck and when a pressure difference between the interior and the exterior of the reservoir is greater or less than at least one predetermined threshold value,
- wherein said safety cell comprises an annular seal (74, 174) which is configured to seal against an annular wall (44, 144) of said neck when the cap is screwed onto the neck by cooperation of the screw thread of said neck and the screw thread of the cover, and which annular seal is further configured to collaborate with the annular wall by bearing with elastic deformation in order to provide a stable transport position for said assembly in which the cap is premounted on the neck and the screw thread of said neck and the screw thread of the cover are not yet cooperating with one another.
(canceled)
A safety cap (10, 110) for a fluid reservoir (14, 114) of a motor vehicle, said cap being configured to be attached and fixed to a neck (12, 112) of said reservoir, said cap comprising:
- a screwing cover (16, 116) comprising a first screw thread (16ba, 116ba), and
- a safety cell (18, 118) configured to allow the passage of gas between an interior of the reservoir and an exterior of the reservoir, when the cap is fixed to said neck and when a pressure difference between the interior and the exterior of the reservoir is greater or less than at least one predetermined threshold value,
- wherein the cap further comprises:
- a ring (20, 120) comprising means (30, 30a, 32, 128, 129) for fixing to said neck and a second screw thread (22, 122) configured to cooperate with said first screw thread, said cell being at least partly housed in the neck and surrounded by said cover and/or said ring when the cap is fixed on said neck, wherein said ring (20, 120) comprises an inner annular surface (20aa, 120aa) intended to surround, with clearance, an outer annular surface (44a, 144a) of said neck (12, 112) so as to define a space (58, 158) for the passage of gas between the ring and the neck.
A fluid reservoir (14, 114) for a motor vehicle, said reservoir comprising:
- a neck (12, 112) on which there is intended to be attached and fixed a cap (10, 110), wherein said neck comprises either:
- (a) a cylindrical wall (44) comprising outer annular rim sectors (50a), said outer annular rim sectors (50a) of said cylindrical wall (44) bear elastic snap-fastening means (52a),
- or
- (b) a cylindrical wall (144) and an annular row of rails (149) projecting from an outer cylindrical surface of this cylindrical wall, said rails being substantially parallel to one another and to an axis (C) of revolution of this cylindrical wall, wherein at least some of said rails (149) bear elastic snap-fastening means (150).
20-23. (canceled)
27-29. (canceled)
An assembly, comprising:
- a reservoir (14, 114) and a cap (10, 110);
- wherein the reservoir includes a neck (12, 112) with an outer annular surface (44a, 144a);
- wherein the cap includes:
- a screwing cover (16, 116) comprising a first screw thread (16ba, 116ba),
- a safety cell (18, 118) configured to allow the passage of gas between an interior of the reservoir and an exterior of the reservoir, when the cap is fixed to said neck and when a pressure difference between the interior and the exterior of the reservoir is greater or less than at least one predetermined threshold value,
- a ring (20, 120) comprising means (30, 30a, 32, 128, 129) for fixing to said neck and a second screw thread (22, 122) configured to cooperate with said first screw thread,
- wherein said safety cell is at least partly housed in the neck and surrounded by said cover and/or said ring when the cap is fixed on said neck, wherein said ring (20, 120) comprises an inner annular surface (20aa, 120aa) to surround, with clearance, the outer annular surface (44a, 144a) of said neck (12, 112) so as to define a space (58, 158) for the passage of gas between the ring and the neck;
- wherein the cap is either:
- premounted on said neck (12, 112), said cap being held on said neck only by the cooperation between an annular seal (74, 174) and a cylindrical wall (44, 144) of the neck,
- or
- fixed to said neck by bayonet effect and/or elastic snap-fastening.
Dependencies are inferred from the claim text.