IP Library › Granted Patent US 8,388,477
Granted Patent B2
US 8,388,477 · App. 12/794,234 · Granted Mar 5, 2013

Toothed belt

Inventors: Carlo Baldovino (Montesilvano, IT); Marco Di Meco (Pescara, IT); Tommaso Di Giacomo (San Martino Sulla Marrucina, IT)
Assignee: Dayco Europe S.r.l.
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Quick Facts
Patent No.
US 8,388,477
App. No.
12/794,234
Granted
Mar 5, 2013
Kind
B2
Abstract

Toothed belt for use in contact with oil and comprising a body and a number of teeth extending from at least one surface of the body; the teeth are coated by a fabric; a resistant layer comprising a plastomer based on fluorine with the addition of elastomeric material, in which the plastomer is present in a larger quantity than the elastomeric material, is applied by adhesion onto the coating fabric. The elastomeric material forming the body of the belt is a copolymer obtained from a dienic monomer and a monomer containing nitrile groups, in which the nitrile groups are between 33% and 49%, preferably 39%, in weight with respect to the copolymer.

Claims (26)

1. A method of using a toothed belt, the method comprising:

providing a toothed belt comprising:

a body comprising a compound based on a second elastomeric material formed of a copolymer obtained from a dienic monomer and a monomer containing nitrile groups;

said nitrile groups are in percentage between 33% and 49% in weight with respect to the weight of said copolymer;

a number of teeth extending from at least one first surface of said body;

said teeth being coated by a first fabric, said first fabric being coated with a resistant treatment, said resistant treatment comprising:

a fluorinated plastomer; and

adapting said toothed belt in direct contact with oil or at least partially immersed in oil.

2. The method of using a toothed belt according to claim 1 , wherein said toothed bell is suitable to resist for its lifetime when used in direct contact or partially immersed in oil.

3. The method of using a toothed belt according to claim 1 , wherein said toothed belt is suitable to pass the duration tests which they undergo for use in motor vehicles.

4. The method of using a toothed belt according to claim 1 , wherein said toothed belt resists at least 80,000,000 cycles in the duration tests which they undergo for use in motor vehicles.

5. The method of using a toothed belt according to claim 1 , wherein said fluorinated plastomer is present in said treatment in a larger quantity than said first elastomeric material.

6. The method of using a toothed belt according to claim 1 , wherein said hydrogenated butadiene acrylonitrile is modified with a zinc salt of polymethacrylic acid.

7. The method of using a toothed belt according to claim 1 , wherein said resistant layer comprises said fluorinated plastomer in a quantity in weight of between 101 and 150 parts in weight with respect to said elastomeric material.

8. The method of using a toothed belt according to claim 1 , wherein said fluorinated plastomer is polytetrafluoroethylene.

9. The method of using a toothed belt according to claim 1 , wherein the back of said belt is coated by a second fabric.

10. The method of using a toothed belt according to claim 1 , wherein said second fabric is coated on the outside by a second resistant layer.

11. The method of using a toothed belt according to claim 10 , wherein said second resistant layer is equal to said first resistant layer.

12. The method of using a toothed belt according to claim 1 , wherein said elastomeric material comprises fibres.

13. The method of using a toothed belt according to claim 12 , wherein said fibres are present in a quantity in weight of between 0.5 and 15% with respect to said elastomeric material.

14. The method of using a toothed belt according to claim 1 , wherein it comprises resistant inserts chosen from the group consisting of aramidic fibres, PBO and carbon fibres.

15. The method of using a toothed belt according to claim 14 , wherein said resistant inserts have been treated with an RFL comprising an oil-resistant latex.

16. The method of using a toothed belt according to claim 15 , wherein said latex comprises an elastomeric material formed of a copolymer obtained from a dienic monomer and a monomer containing nitrile groups.

17. The method of using a toothed belt according to claim 1 , wherein it comprises between the teeth and said back sides treated with a polymer resistant to expansion.

18. The method of claim 1 wherein said resistant treatment comprises a resistant layer.

19. The method of claim 1 , wherein said fluorinated plastomer is present in said treatment in a larger quantity than said first elastomeric material.

Continuity (2)
Continuation 10590224
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