SEALING ARRANGEMENT
A sealing arrangement includes a first member having a non-circular hole, a second member having a non-circular and annular groove that extends continuously around an outer circumference of the second member, and a seal made of an elastic material and seated in the groove. An outer circumference of a body of the seal is in contact with a wall of the first member defining the non-circular hole, and an inner circumference of the body of the seal is in contact with a wall of the second member defining the groove. At least one protrusion protrudes from at least one portion of the body where a relatively low contact pressure is applied between the body and the groove and along a direction of insertion of the second member into the first member.
1 . A sealing arrangement comprising:
a first member having a non-circular hole formed therein;
a second member having a non-circular and annular groove extending continuously around an outer circumference of the second member; and
a seal made of an elastic material and seated in the groove to seal between the first member and the second member,
wherein the seal comprises:
a non-circular and annular body, an outer circumference of the body being in contact with a wall of the first member defining the non-circular hole of the first member and an inner circumference of the body being in contact with a wall of the second member defining the groove; and
at least one protrusion protruding from at least one portion of the body where a relatively low contact pressure is applied between the body and the groove of the second member and along a direction of insertion of the second member into the first member.
2 . The sealing arrangement of claim 1 , wherein the body of the seal comprises two straight portions seated in the groove on opposite sides of the second member and two arc-like portions connecting the two straight portions at their ends, and each of the at least one protrusion protrudes from either one of the two straight portions of the body.
3 . The sealing arrangement of claim 1 , wherein the second member comprises at least one notch, one for each protrusion of the seal, each configured to engage with a corresponding protrusion of the seal.
4 . The sealing arrangement of claim 2 , wherein
the at least one protrusion comprises a plurality of the protrusions, one of the protrusions protruding from one of the two straight portions and another of the protrusions protruding from the other of the two straight portions.