DE7705410U1 - Sealing cap for a filler neck - Google Patents

Description

PATENTANWÄLTE ZENZ & HELBER · D 4300 ESSEN T- * A ¹ Wl "RUHR" STE "| 1m 1 · TEL. * (02 01) 4126 page '~ A 40

AUTO SECURITY PRODUCTS LIMITED

DAWLEY BROOK TRADING ESTATE, STALLINGS LANE, KINGSWINFORD, BRIERLEY HILL, WEST MIDLANDS, DY6 7AP, England

Sealing cap for a filler neck

The invention relates to a closure cover with a closure part which can be brought into contact with a filler neck in a sealing manner, at least one holding element, the counter-element associated with one of the filling nozzles for holding the cover in place is engaged on the filler neck and is movable between a closed position and a release position relative to the closure part is, further with a penetrating the closure part, an escape of gases through the auf dem.Füllstutzen attached Closing part enabling passage and a passage closing and at a certain overpressure in the Filler neck opening pressure relief valve.

A closure cap of this type is described in GB-PS 1,400,062. When the closure cap described in this publication is removed from the filler neck, normally Parts closed in the filler neck, in particular the inner end of the passage through the cover, are exposed. Through this there is a risk of dust particles or other impurities inadvertently entering the passage on its interior Penetrate the end and possibly impair the functionality of the valve. It can be seen that through the dust entering the inner end of the passage

through - flowing from the passage when venting the filler neck

Gases are conveyed in the direction of the valve. 3 / ko.

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It is the object of the invention to overcome this disadvantage of the known closure cap to eliminate.

According to the invention, this object is achieved in that that with the interior of the filler neck with the cap in place communicating end of the passage is covered by a cover part, which is assigned to the holding element / that he is at whose movement into the closed position is moved away from the passage and when it moves into the release position on the Passage is moved.

Because of this design of the closure cap, the end of the passage communicating with the interior of the filler neck is the end of the passage (i.e. the inner end of the passage) open when the lid is in its closed position on the filler neck, but closed when the cover is removed from the filler neck. In this way, penetration of external solid particles is possible prevented in the passage from its inner end when removing the lid from the filler neck.

The cover part can be rotated and axially displaceable about a cover axis or can be arranged both axially movable and rotatable.

The cover preferably has the shape of an annular disk, from which the holding element projects radially outward.

In a further development of the invention, the cover can be provided with a second passage containing a valve, the The valve opens when the external pressure is a predetermined amount higher than the pressure in the interior of the filler neck. The cover part can also cover the inner end of the second passage. However, since the gas flow through the second passage from the outer end of which is directed towards its inner end, the entry of solid particles is at the inner end of the second passage much less likely than particulate matter to enter through the inner end of the first passage.

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In the following the invention is explained in more detail with reference to an embodiment shown in the drawing. In the Drawing show:

1 shows an axial section through an embodiment of the closure cap according to the invention; and

Fig. 2 is a partial sectional view taken along the line II - II in Fig. 1.

The cap shown in the drawing is used to close a tank filler neck for a motor vehicle. the In the drawing not shown filler neck has at its outer end a radially inwardly projecting Flange which forms a seat for a seal provided on the cover. At the radially inner edge of the Flange, ramp-shaped projections are formed, which start from recesses in the seat and axially inward get lost.

The closure cap 10 spans the open end of the filler neck in the closed position. It has a metal body 11 with a seal 12 made of an elastically deformable material, e.g. B. rubber on. The seal 12 is designed as a ring seal and attached to the metal body 11 in such a way that, when the cap is attached to the filler neck, it is attached to the seat of the filler. Nozzle is in plant.

The lid 10 has a central opening in which a key-operated Lock mechanism 14 is arranged, which when the correct key is inserted relative to the locking cover 10 can be rotated about an axis 13. An inner end portion of the lock mechanism is of a sleeve-shaped part 15 of the Cover surrounded. The cover also has a plate-shaped centering piece 16 with a central opening in which the

slide-

hülsenföonige part 15 is added. At the metrically opposite Points of the cover are also provided radially outwardly facing lugs 17 which are inserted into the recesses on

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Filler neck can engage and secure the closing part of the lid against rotational movement relative to the filler neck.

The cover also has two holding elements 18 which are formed on an annular disk 19 and radially from this protrude outwards. The central opening of the annular disk 19 encloses the sleeve-shaped part 15 with sufficient play, so that the washer can rotate relative to the rest of the cover part and move axially.

To transmit the rotary movement from the lock mechanism 14 to the holding elements 18, a cup-shaped component 20 is used, whose Side wall the sleeve-shaped part 15 of the metal body at a distance surrounds. The side wall of the cup-shaped component 20 is axially extending at points diametrically opposite one another Provided slots 21 through which the holding elements penetrate. The end wall of the cup-shaped component is with a Provided opening through which an extension of the lock mechanism engages. The cup-shaped component is on this extension fastened with the aid of a locking pin 23. The opening in the end wall of the cup-shaped component and the circumference of the extension 22 have complementary, non-circular cross-sectional shape, so that the cup-shaped component with the lock mechanism turns.

In the cup-shaped. Component 20 is a coil spring 24 is arranged, which pushes the annular disk 19 relative to the lock mechanism 14 and to the locking part 10 axially outward. If the Lid is attached to the filler neck, the retaining elements 18 reach through the recesses in the seat of the filler neck, run when the lock mechanism is turned on the ramp surfaces of the filler neck and are thereby axially following moved inside. As a result, the spring 24 is compressed, and the seal 12 comes to the seat of the filler neck in printing system.

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When the key is pulled out of the lock mechanism or lock cylinder 14, the grip in the drawing tumblers, not shown, radially outwards into axial grooves in metal body 11. The tumblers prevent this Way a rotation of the lock cylinder or lock mechanism relative to the cover part 10. Since the latter against rotation relative is secured to the filler neck by the lugs 17, rotation of the holding elements relative to the filler neck is also excluded. When the key is inserted, the tumblers are retracted into the lock cylinder so that the latter can be rotated relative to the cover 10.

In the cover or closure part 10 passages 25 and 26 are formed. The inner end of each of these passages is in Centering piece 16 is formed, and each passage extends from this inner end in the axial direction through the Metal body 11, from there radially outwards between the body 11 and an outer cap 27 and finally radially inwards to to the outer end next to the outer edge of the seal 12. Of course, the outer end of each passage is outside the Filler neck and the sealing surface when the lid is attached to the filler neck.

The inner end of the passage 25 is relatively narrow. A widened section closes in the body 11 at the inner end 28 of the passage 25. This expanded portion extends to the axially outward surface of the body 11. Within the enlarged portion, a valve 29 is arranged, which by a spring 30 axially inwardly on a valve seat formed on the body 11 is urged. The spring acts between the valve 29 and a disk-shaped abutment component 31 which is fitted into the enlarged section 28 with an interference fit. This disc-shaped abutment component has a central opening through which gases can escape. The valve 29 has an O-ring 32 made of rubber or other elastic material, which is supported by a relatively rigid bearing body which transmits the force from the valve spring 30 to the O-ring is supported. The valve is usually operated by the spring

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held on its seat, but lifted from its seat when the pressure at the inner end of the passage 25 den External pressure exceeds a predetermined amount. The valve enables then the passage of gases from the filler neck to the outside atmosphere.

Passage 26 contains another valve 34 through which air can penetrate into the filler neck when the internal pressure in the filler neck falls below the pressure of the outside atmosphere by a certain amount. The valve 34 is in an enlarged section 35 of the passage 26, which extends up to an axially inner end face of the body 11. The valve will axially outward from a spring 36 / with one formed on the body 11 Valve seat pushed. The spring is held by the centering piece 16 in the enlarged section 35. If necessary, can a disk-shaped component similar to component 31 can also be provided for this passage or this spring.

As can be seen in Fig. 1, the holding elements 18 are in the process of being removed of the lid of the filler neck aligned with the lugs 17, and the spring 24 urges the washer 19 against the Centering piece 16. The inner ends of the passages 25 and 26 are covered by the annular disk 19, which therefore prevents penetration of foreign particles in the passages prevented. When the lid is attached to the filler neck, the washer became and the holding elements 18 rotated relative to the closure part 10 about the cover axis and also relative to the closure part axially shifted inwards. The washer is therefore moved away from the openings 25 and 26 and no longer obstructs one Entry of gases at the inner ends of these passages.

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Claims (6)

* t »» Il «III Hit llll» • «« It I · t • • »tit Il PATENTANWÄLTE ZENZ ft HELBER> D 4300 ESSEN 1 · A \ ^ RwVlRSTfelf4 1 ^ tYEL,! '(02 <3> 1) 4128 67 Page - 7 - MM Mm MWÖÄClteltert offered Uüt Pwtenl-AnwolcluiHi WM Qbl y ^ ^ claims 1. Closure cap with a closure part that can be brought into contact with a filler neck in a sealing manner, at least one holding element, which is in engagement with a mating element assigned to the filler neck for holding the lid on the filler neck ) and between a closed position and a release position relative to the closure part] is movable, furthermore with an escape of gases through the closure part penetrating through the closure part attached to the filler neck enabling passage and a passage which closes the passage and at one certain overpressure in the filler neck opening overpressure valve, characterized in that the with the Interior of the filler neck with the cap (10) in place. Communicating end of the passage (25) through a cover part (19) is covered, which is assigned to the holding element (18) εο is that it moves away from the passage (25) when it moves into the closed position and when it moves -λ is moved into the release position on the passage (25). 2. Closure cap according to claim 1, characterized in that «, the holding element (18) between the closed position and the The release position is subjected to a rotary movement about an axis and an axial movement and that the cover part (19) in axial direction to and from the passage (25) movable is arranged. 3. Closure cap according to claim 1, characterized in that the holding element (18) between the closed position and the The release position is subject to a rotary movement about an axis and an axial movement and that the cover part (19) is also subject to Z / ko. 7705410 10/27/77 Il Il ti I I I I till Il) Il I I I I > I till I II) I 1 t I its relative movement to the passage (25) is rotated about the axis. 4. Closure cap according to one of claims 1 to 3, characterized in that the cover part is designed as an annular disc (19) is, from which the holding element (18) protrudes radially outward. 5. Closure cap according to one of claims 1 to 4, characterized in that the pressure relief valve (29) to the with the The interior of the filler neck is arranged when the cap is in place and communicating with the end of the passage (25). 6. Closure cap according to claim 5, characterized in that the passage (25) has one with the interior of the filler neck having communicating enlarged portion (28), the pressure relief valve (29) is arranged in the enlarged section and by a spring (30) against a valve seat in the enlarged Section is urged and that the spring between the pressure relief valve and one in the enlarged section (28) attached separate abutment part (31) is effective. 7705410 10/27/77