Toothed Belt
AssigneeDayco Europe S.R.L.
InventorsCarlo Baldovino, Marco Di Meco, Tommaso Di Giacomo
Life of this patent
Estimating the term…
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.
Claims50
A method of providing a toothed belt for use in an oil-wet environment, the method comprising:
- providing a toothed belt and adapting said toothed belt for use in direct contact with oil or at least partially immersed in oil, said belt comprising a body, a number of teeth extending from at least one first surface of said body,
- said teeth being coated by a first fabric, said fabric being externally coated with a resistant layer, said resistant layer comprising
- a fluorinated plastomer,
- a first elastomeric material, and
- a vulcanisation agent,
- said fluorinated plastomer present in said resistant layer in a larger quantity than said first elastomeric material,
- said 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, and
- said nitrile groups are in percentage between 33% and 49% in weight with respect to the weight of said copolymer.
A method of using a toothed belt, the method comprising:
- providing a toothed belt comprising:
- a body;
- a number of teeth extending from at least one first surface of said body;
- said teeth being coated by a first fabric, said fabric being externally coated with a resistant layer, said resistant layer comprising:
- a fluorinated plastomer;
- said body comprising a compound based on an elastomeric material formed of a copolymer obtained from a dienic monomer and a monomer containing nitrile groups, and
- said nitrile groups are in percentage between 33% and 49% in weight with respect to the weight of said copolymer;
- and
- using said toothed belt in direct contact with oil or at least partially immersed in oil.
A timing control system for a motor vehicle engine comprising at least one drive pulley, one driven pulley, a toothed belt and means for maintaining said toothed belt in oil-wet condition;
- said toothed belt comprising a body and a number of teeth extending from at least one surface of said body;
- said teeth being coated by a fabric, said fabric being externally coated by a resistant layer, in which:
- said resistant layer comprises a fluorinated plastomer, a first elastomeric material and a vulcanisation agent;
- said fluorinated plastomer is present in said resistant layer in a larger quantity than said first elastomeric material;
- said body comprises a compound based on a second elastomeric material formed of a copolymer obtained from a dienic monomer and a monomer containing nitrile groups;
- and
- said nitrile groups are in percentage between 33% and 49% in weight with respect to the weight of said copolymer.
An oil-resistant toothed belt comprising a body and a number of teeth extending from at least one first surface of said body;
- said teeth being coated by a first fabric, said fabric being externally coated with a resistant layer, said belt comprising:
- said resistant layer comprising a fluorinated plastomer, a first elastomeric material and a vulcanisation agent;
- said fluorinated plastomer present in said resistant layer in a larger quantity than said first elastomeric material;
- said 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;
- and
- said nitrile groups in a percentage between 33% and 49% in weight with respect to the weight of said copolymer.
Dependencies are inferred from the claim text.