Tire with quadrangular studs
AssigneeNokian Tyres PLC
InventorPentti Juhani Eromaki
Life of this patent
Estimating the term…
Abstract
The invention relates to a studded air-filled vehicle tire having a rolling direction and comprising a rubber tread with pattern blocks and grooves that-separate the blocks. Premade stud holes are arranged in the tread. Anti-slip studs each include a hard cermet piece that has a substantially quadrangular shape with diagonal dimensions are in at least part of the stud holes. At least part of the anti-slip studs arranged in the stud holes are orientated so that one of the diagonal dimensions of the hard cermet piece is located in the rolling direction or forms an angle, not larger than a toe-out angle with respect to the rolling direction.
Claims51
A studded air-filled vehicle tire, having a predetermined rolling direction, and comprising a rubber tread with pattern blocks, grooves separating said blocks and premade stud holes in said tread, said tire being provided with anti-slip studs each with a bottom end, a top end, and a total length therebetween, said studs being inserted in at least some of said stud holes, each of said studs comprising:
- a body with a bottom flange and a shank with a top bowl, said bottom flange having a substantially quadrangular shape with diagonal dimensions perpendicular to said total length and perpendicular to each other;
- and
- a hard piece of a different material than said body, and protruding out of said top bowl, said hard piece having a substantially square shape with side surfaces and edges therebetween, and diagonal dimensions extending from each edge to an opposing edge and being substantially equal to each other and perpendicular to said total length;
- and
- wherein substantially all of the studs inserted in the stud holes are orientated so that one of said diagonal dimensions of the hard pieces forms a toe-out angle that is smaller than 10° with respect to the rolling direction.
A studded air-filled vehicle tire, having a predetermined rolling direction, and comprising a rubber tread with pattern blocks, grooves separating said blocks and premade stud holes in said tread, said tire being provided with anti-slip studs each with an inner head, an outer head, and a total length therebetween, said studs being inserted in at least some of said stud holes, each of said studs comprising:
- a body with a bottom flange and a shank, said bottom flange having a substantially quadrangular shape with diagonal dimensions perpendicular to said total length;
- and
- a hard cermet piece of a different material than said body, and protruding out of said outer head, said hard cermet piece having a substantially square shape with equal diagonal dimensions perpendicular to said total length;
- and
- wherein said hard cermet piece has an orientation with respect to the bottom flange such that said diagonal dimensions of the bottom flange (i) are substantially parallel to the diagonal dimensions of the hard cermet piece separate from the bottom flange;
- or (ii) form a first toe-out angle that is smaller than 30° with respect to the diagonal dimensions of the hard cermet piece;
- and
- wherein at least some of the anti-slip studs inserted in the stud holes are orientated so that one of said diagonal dimensions of each respective hard cermet piece (i) is in said rolling direction, or (ii) forms a second toe-out angle that is smaller than 30° , with respect to the rolling direction;
- and
- wherein on at least one side of the tire, said inserted anti-slip studs comprise at least one first group of said anti-slip studs and at least one second group of said anti-slip studs, said orientation of said hard cermet piece with respect to the bottom flange of each of said studs of said first group being different than said orientation of said hard cermet piece with respect to the bottom flange of each of said studs of said second group.
A studded air-filled vehicle tire, having a predetermined rolling direction, and comprising a rubber tread with pattern blocks, grooves separating said blocks and premade stud holes in said tread, said tire being provided with anti-slip studs each with an inner head, an outer head, and a total length therebetween, said studs being inserted in at least some of said stud holes, each of said studs comprising:
- a body with a bottom flange and a shank with a top bowl, said bottom flange having a substantially quadrangular shape with sides and rounded edges therebetween and with diagonal dimensions perpendicular to said total length and substantially perpendicular to each other;
- and
- a hard cermet piece of a different material than said body, and protruding out of said outer head, said hard cermet piece having a substantially square shape with side surfaces and edges therebetween, and substantially equal diagonal dimensions perpendicular to said total length;
- and
- wherein said diagonal dimensions of the bottom flange (i) are substantially parallel to the diagonal dimensions of the hard cermet piece;
- or (ii) form a toe-out angle with respect to the diagonal dimensions of the hard cermet piece;
- and
- wherein substantially all of said anti-slip studs inserted in the stud holes are orientated so that one of said diagonal dimensions of the hard cermet pieces is substantially in said rolling direction.
A studded air-filled vehicle tire, having a single predetermined rolling direction, and comprising a rubber tread with pattern blocks, grooves separating said blocks and premade stud holes in said tread, said tire being provided with anti-slip studs each with an inner head, an outer head, and a total length therebetween, said studs being inserted in at least some of said stud holes, each of said studs comprising:
- a body with a bottom flange and a shank with a top bowl, said bottom flange having a substantially quadrangular shape with diagonal dimensions perpendicular to said total length and perpendicular to each other;
- and
- a hard cermet piece of a different material than said body, and protruding out of said outer head, said hard cermet piece having a substantially square shape with side surfaces and edges, and substantially equal diagonal dimensions perpendicular to said total length;
- and
- wherein said diagonal dimensions of the bottom flange (i) are substantially parallel to the diagonal dimensions of the hard cermet piece separate from the bottom flange;
- or (ii) form a toe-out angle with respect to the diagonal dimensions of the hard cermet piece;
- and
- wherein substantially all of said anti-slip studs inserted in the stud holes are orientated so that one of said diagonal dimensions of the hard cermet pieces is substantially in the rolling direction, and
- wherein when observed in said single predetermined rolling direction of the tire, said toe- out angles of the diagonal dimensions of the hard cermet pieces are oriented outwardly from a center line of the tread.
Dependencies are inferred from the claim text.