Device for uncovering an opening in a housing part of a steering gear

1. Device comprising a housing part of a steering gear in a vehicle steering system, said housing part having an opening, a closure element that closes said opening, a component that, when it comes into contact with a liquid, changes at least one of its properties such that after said component cooperates with said closure element, said closure element exposes said opening.

2. Device in accordance with claim 1 , wherein said component increases its volume when it comes into contact with a liquid.

3. Device in accordance with claim 2 , wherein said component is arranged relative to said closure element such that when its volume increases it presses said closure element out of said opening.

4. Device in accordance with claim 3 , comprising a piston arranged between said component and said closure element.

5. Device in accordance with claim 2 , wherein said closure element comprises an elastomer.

6. Device in accordance with claim 2 , wherein said component is arranged relative to said closure element such that when the volume increases it lifts said closure element inward from said opening against a spring element that is pressing said closure element into its closed position.

7. Device in accordance with claim 1 , wherein said component comprises a hydrophilic chloroprene rubber.

8. Device in accordance with claim 1 , wherein said component comprises a material that, when it comes into contact with a liquid, reacts chemically such that said component destroys said closure element.

9. Device in accordance with claim 1 , wherein said component comprises a material that, when it comes into contact with a liquid, reacts such that said component dissolves and loosens the locking of said closure element in said housing part and exposes said opening.

10. Device in accordance with claim 9 , wherein said component is integrated in an intermediate space formed between said housing part and said closure element.

11. Device in accordance with claim 9 , wherein said component is integrated in an annular gap formed between said housing part and said closure element such that said closure element is arranged in a form-fit in said housing part.

12. Device in accordance with claim 11 , wherein mechanically connected surfaces of said component and/or of said closure element and/or of said housing part have a friction-enhancing surface roughness.

13. Device in accordance with claim 9 , wherein said component is integrated prestressed in said annular gap formed between said housing part and said closure element.

14. Device in accordance with claim 9 , wherein said annular gap formed between said housing part and said closure element tapers toward the exterior of the housing.

15. Device in accordance claim 9 , wherein the closure element and/or housing part have at least one movement-inhibiting element.

16. Device in accordance with claim 9 , wherein a prestressed spring element is integrated between the closure element and the housing part.

17. Device in accordance with claim 9 , comprising a seal arranged between the housing part and the closure element.

18. Device in accordance with claim 9 , comprising a draining device arranged in said closure element and/or in said housing part and/or between the closure element and the housing part.

19. Device in accordance with claim 1 , wherein the device it is arranged largely at the lowest point of said steering gear.

20. Device in accordance with claim 1 , wherein said component and said closure device are arranged in a sleeve that is connected to said housing part.

21. Device in accordance with claim 20 , wherein said sleeve has an opening that connects to said opening in said housing part.