Floating caliper

1 . A floating caliper, comprising:

a caliper body arranged straddling a brake disc, said brake disc rotating about a rotation axis which defines an axial direction, a radial direction orthogonal to said axial direction, and a circumferential direction orthogonal to both said axial direction and said radial direction;

wherein said caliper body is movably supported in axial direction at at least one guide pin;

said at least one guide pin comprises a pin sliding portion of predetermined pin axial extension;

said caliper body comprises a pin seat which slidingly accommodates a portion of said pin sliding portion;

said pin seat has a predetermined pin seat axial extension said floating caliper further comprises a sealing arrangement interposed between said pin seat and said guide pin;

said sealing arrangement comprises a tubular-shaped sealing arrangement body made in one piece which crosses said entire pin seat;

said sealing arrangement comprises a sealing arrangement outer surface, a portion of which is in contact with said pin seat;

said sealing arrangement comprises a sealing arrangement inner surface, a portion of which is in contact with said pin sliding portion;

wherein the portion of the sealing arrangement outer surface that is in contact with said pin seat is substantially longer than the portion of the sealing arrangement inner surface that is in contact with the pin sliding portion, thus creating at least one sealing arrangement channel between said sealing arrangement and said pin sliding portion;

wherein said at least one sealing arrangement channel is open to come out of said pin seat; and

wherein said sealing arrangement channel is adapted to receive at least one coupling portion therein;

wherein in an operating condition the at least one coupling portion, or a pin coupling seat, is adapted to be radially aligned below the sealing arrangement channel.

2 . The floating caliper according to claim 1 , wherein

said sealing arrangement comprises a sealing arrangement foot which forms said sealing arrangement inner surface and has a sealing arrangement foot thickness equal to the predefined distance between said pin sliding portion and said pin seat; and

wherein with the exception of said sealing arrangement foot, the remaining sealing arrangement portions of said sealing arrangement have a sealing arrangement thickness, said thickness assessed in a section obtained via a plane comprising an axial direction and a radial direction, which is less than said thickness of sealing arrangement foot; and/or

wherein said sealing arrangement foot has a section in a plane comprising an axial direction and a radial direction which is trapezoidal in shape, with smaller base facing said pin sliding portion.

3 . The floating caliper according to claim 2 , wherein when the floating caliper is in position of pads and brake disc not worn, said sealing arrangement foot delimits two opposite sealing arrangement channels between said sealing arrangement and said pin sliding portion.

4 . The floating caliper according to claim 2 , wherein

the sealing arrangement channel foot comprises two shoulders, wherein said two shoulders are radially between said pin seat and said pin sliding portion, and are each planar.

5 . The floating caliper according to claim 1 , wherein

said sealing arrangement comprises the at least one coupling portion, and wherein said at least one coupling portion is accommodated in the pin coupling seat, thus restraining said sealing arrangement to said pin sliding portion; and wherein

said sealing arrangement channel is open and in communication with said coupling portion.

6 . A method for moving a floating caliper by sliding it over a guide pin during of braking and wearing of a pad and/or a brake disc, comprising the steps of:

providing the floating caliper as defined in claim 5 ;

during the wear of the pad and/or the brake disc, moving said floating caliper so that said coupling portion of the sealing arrangement enters said pin seat.

7 . The floating caliper according to claim 1 , wherein

when the floating caliper is in position of pads and brake disc not worn, said sealing arrangement comprises at least one folding sealing arrangement portion; wherein

said folding sealing arrangement portion forms at least two loops, said loops comprising a folding sealing arrangement portion axial loop and a folding sealing arrangement portion radial loop; wherein

said folding sealing arrangement portion axial loop has concavity facing the axial direction and

said folding sealing arrangement portion radial loop has concavity facing the radial direction.

8 . The floating caliper according to claim 1 , wherein

said pin seat is delimited on one side the side facing the vehicle by an opposite supporting seat edge; and wherein

said pin seat is delimited on the side facing a caliper support by a supporting side seat edge; and wherein

said pin seat is delimited by a pin seat inner surface which extends between said opposite supporting seat edge and said supporting side seat edge; and wherein

said sealing arrangement comprises a seat sealing arrangement length which embraces said opposite supporting seat edge, said pin seat inner surface, said supporting side seat edge

or

said sealing arrangement comprises a seat sealing arrangement length which adheres to said opposite supporting seat edge, said pin seat inner surface, said supporting side seat edge.

9 . The floating caliper according to claim 1 , wherein

said pin sliding portion is a bushing fitted above said guide pin, and wherein said guide pin comprises a stay bolt firmly connected to a caliper support on which said bushing is fitted, and wherein

said sealing arrangement comprises said at least one coupling portion accommodated in the pin coupling seat provided in said bushing, thus restraining said sealing arrangement to said bushing; and wherein

said sealing arrangement channel is open and in communication with said coupling portion.

10 . The floating caliper according to claim 9 , wherein said bushing is sandwiched between a guide pin head provided in said stay bolt and said caliper support.

11 . A floating caliper, comprising:

a pin seat,

a pin sliding portion,

a sealing arrangement,

wherein said sealing arrangement comprises at least one coupling portion,

wherein said sealing arrangement is directly attached to said pin sliding portion via the at least one coupling portion,

wherein at least one portion of an outer portion of said sealing arrangement is in direct facing contact with the pin seat,

wherein at least one portion of an inner portion of said sealing arrangement is in direct facing contact with the pin sliding portion,

wherein said at least one portion of said outer portion of said sealing arrangement that is in direct facing contact with the pin seat is longer than said at least one portion of said inner portion of said sealing arrangement that is in direct facing contact with said pin sliding portion, and

a sealing arrangement channel,

wherein said sealing arrangement channel is adapted to slide axially and receive the at least one coupling portion therein so that the at least one coupling portion is adapted to be radially aligned below the sealing arrangement channel.