Seal for a coupling for protective tubing for electrical cables and a coupling including such a seal
AssigneeBertoldo & C. S. r. l.
InventorPiero Bertoldo
Life of this patent
Estimating the term…
Abstract
The seal (4) has an annular body (10) with a generating section which is substantially rectangular and with an inner cylindrical surface (18) having a diameter (d1) substantially equal to the nominal diameter of the tubing (2) to be connected to the coupling (1). The seal (4) has a rib (20) projecting radially inwardly and having an inner diameter (d2) less than the outer diameter (d1) of the tubing. The seal also has an annular lip (24) which projects axially and has an inner surface with a diameter (d3) intermediate the internal diameter (d2) of the radial rib (20) and the diameter (d1) of the inner surface (18) of the seal (4).
Claims13
A seal for a coupling for protective tubing for electrical cables, intended to establish liquid-tight contact with protective tubing (2, 30) having a nominal diameter to be connected to the coupling (1), the coupling (1) including a seat (6) in a body element (8) of the coupling (1), the seal (4) comprising:
- an annular body (10) with a generating section which is substantially rectangular, an outer cylindrical surface (12) intended to establish sealing contact with a corresponding wall of the seat (6) in the body element (8) of the coupling (1), an inner cylindrical surface (18) of the seal (4) extending from an open end of the seal (4) and having a diameter (d1) substantially equal to the nominal diameter of the tubing (2, 30) to be connected to the coupling (1), a rib (20) projecting radially inwardly of the seal (4) whose inner diameter (d2) is less than the outer diameter of the tubing (2, 30), and an axially projecting annular lip (24) which has an inner surface with a diameter (d3) intermediate the inner diameter (d2) of the radial rib (20) and the diameter (d1) of the inner cylindrical surface (18) of the seal (4), wherein the diameter (d3) of the inner surface of the lip (24) defines the minimum inner diameter of the lip (24).
A coupling for tubes for protecting electrical cables, comprising:
- a body element (8) having a seat (6);
- and
- a seal disposed in the seat (6) and including an annular body (10) with a generating section which is substantially rectangular, an outer cylindrical surface (12) intended to establish sealing contact with a corresponding wall of the seat (6) in the body element (8), an inner cylindrical surface (18) of the seal (4) extending from an open end of the seal (4) and having a diameter (d1) substantially equal to a nominal outside diameter of the tubing (2,30) to be connected to the coupling, a rib (20) projecting radially inwardly of the seal (4) whose inner diameter (d2) is less than the outer diameter of the tubing (2,30), and an annular lip (24) which has an inner surface with a diameter (d3) intermediate the inner diameter (d2) of the radial rib (20) and the diameter (d1) of the inner cylindrical surface (18) of the seal (4), wherein the diameter (d3) of the lip (24) defines the minimum inner diameter of the lip (24).
Dependencies are inferred from the claim text.