초록 ▼

A grommet for use in a cable fitting includes a body having a bore substantially therethrough and a resilient membrane located within the bore. The resilient membrane has a thinner membrane portion extending radially towards the bore to provide a controlled tear during cable insertion. The body has

A grommet for use in a cable fitting includes a body having a bore substantially therethrough and a resilient membrane located within the bore. The resilient membrane has a thinner membrane portion extending radially towards the bore to provide a controlled tear during cable insertion. The body has an exit opening which comprises resilient gripping teeth projecting axially from the body with an axially extending resilient foldable membrane located between at least two adjacent resilient teeth and foldable therebetween when they are radially compressed. Once force is applied by the axial movement of the fitting assembly onto a tapered surface of the grommet, the flexible gripping members radially collapse towards an inserted cable. The grommet may be assembled in a strain relief connector having a nut, a connector body and optionally an insert.

대표청구항 ▼

1. A grommet for use in a cable fitting, said grommet comprising: a body having a bore substantially therethrough, said bore having a cable opening for receiving a cable to be inserted and an exit opening for the cable to exit from the body;a resilient membrane located within the bore, said resilien

1. A grommet for use in a cable fitting, said grommet comprising: a body having a bore substantially therethrough, said bore having a cable opening for receiving a cable to be inserted and an exit opening for the cable to exit from the body;a resilient membrane located within the bore, said resilient membrane elastically deformable from a receiving position, before the cable is inserted into the bore, to an inverted position, after the cable is inserted into the bore;wherein the resilient membrane comprises at least one thinner membrane portion which extends radially towards the bore to facilitate controlled tearing of the resilient membrane. 2. The grommet as defined in claim 1, wherein, in the receiving position, the resilient membrane extends axially forward towards the cable opening, and, in the inverted position, the resilient membrane extends axially away from the cable opening. 3. The grommet as defined in claim 2, wherein, in the receiving position, the resilient membrane is substantially conically shaped having an apex extending forward towards the cable opening. 4. The grommet as defined in claim 3, wherein, in the receiving position, the apex is substantially axially coincident with the cable opening, and, in the inverted position, the apex has been elastically deformed towards the exit opening. 5. The grommet as defined in claim 3, wherein, in the receiving position, the resilient membrane extends across substantially all of the bore and is completely contained within the bore with the apex substantially flush with the cable opening. 6. The grommet as defined in claim 3 wherein the at least one thinner membrane portion extends from the apex towards the bore, and is adapted to create a controlled tear as the cable is first inserted into the bore and the resilient membrane elastically deforms from the receiving position to the inverted position. 7. The grommet as defined in claim 1 further comprising: a number of resilient gripping members projecting axially from the exit opening; andwherein, in the inverted position, the resilient membrane is intermediate to the bore and the cable, and, elastically deformed towards the exit opening such that at least a portion of the resilient membrane is axially coincident with at least one of the resilient gripping members and located intermediate the cable and the at least one of the resilient gripping members. 8. A cable fitting comprising a grommet as defined in claim 1. 9. A grommet for use in a cable fitting, said grommet comprising: a body having a bore substantially therethrough, said bore having a cable opening for receiving a cable to be inserted and an exit opening for the cable to exit from the body;a resilient membrane located within the bore, said resilient membrane elastically deformable from a receiving position, before the cable is inserted into the bore, to an inverted position, after the cable is inserted into the bore;wherein the exit opening comprises a number of resilient gripping members projecting axially from the body, and, a number of resilient foldable membranes, each resilient foldable membrane located between two adjacent resilient gripping members, said resilient foldable membranes folding between the resilient gripping members when the resilient gripping members are radially compressed. 10. A cable fitting comprising a grommet as defined in claim 9. 11. A grommet as defined in claim 9, wherein the resilient membrane further comprises at least one thinner membrane portion extending radially towards the bore, said at least one thinner membrane adapted to create a controlled tear as the cable is first inserted into the bore and the resilient membrane elastically deforms from the receiving position to the inverted position. 12. A cable connector comprising: a connector nut having an internal engagement surface;a connector body axially movable relative to the connector nut and having an angled engagement surface;a grommet contained within the connector nut and the connector body, said grommet having a bore substantially therethrough, said bore having a cable opening for receiving a cable at a receiving end and an exit opening for the cable to exit at an exiting end, and,resilient gripping members projecting axially from the grommet at the exit opening, an external portion of the resilient gripping members fittingly engaging the angled engagement surface of the connector body;a resilient membrane located within the bore, said resilient membrane elastically deformable from a receiving position, before the cable is inserted into the bore, to an inverted position, after the cable is inserted into the bore;wherein axially moving the connector nut towards the connector body causes the internal engagement surface and the angled engagement surface to apply axial and radial pressure in the grommet; andwherein axial movement of the connector nut towards the connector body causes the angled engagement surface of the connector body to radially compress the resilient gripping members towards the cable. 13. The cable connector as defined in claim 12, further comprising at least one resilient foldable membrane extending between adjacent resilient gripping members, wherein the at least one resilient foldable membrane folds between the adjacent resilient gripping members when the resilient gripping members are radially compressed toward the cable. 14. The cable connector as defined in claim 13, wherein said grommet has an engagement surface at the receiving end for fittingly engaging the internal engagement surface of the connector nut, and, a tapered engagement surface at the exiting end for engaging the angled engagement surface of the connector body, said tapered engagement surface comprising the external portion of the resilient gripping members such that axially moving the connector nut towards the connector body causes the internal engagement surface to apply axial and radial pressure on the engagement surface of the receiving end and the angled engagement surface of the connector body to apply axial and radial pressure to the tapered engagement surface of the exiting end causing the gripping members to radially compress about the cable. 15. The cable connector as defined in claim 13 wherein, in the inverted position, the resilient membrane is intermediate to the bore and the cable, and, elastically deformed towards the exit opening such that at least a portion of the resilient membrane is axially coincident with at least one of said resilient foldable membranes located between adjacent resilient gripping members and located intermediate the cable and the at least one of said resilient foldable membranes. 16. The cable connector as defined in claim 12, wherein, in the receiving position, the resilient membrane extends axially forward towards the cable opening, and, said resilient membrane is axially displaced during insertion of the cable from the receiving position to the inverted position, which is an inverted orientation with respect to the receiving position and is oriented away from the cable opening. 17. The cable connector as defined in claim 12 further comprising: an insert contained within the connector nut and the connector body and located intermediate the connector nut and grommet, said insert having a central opening for receiving the cable, a gripping surface located within the central opening for gripping the cable, and a removed radial section facilitating movement of the central opening towards the cable to permit the gripping surface to grip the cable. 18. The cable connector as defined in claim 17, wherein the insert further includes a radially expanded section substantially longitudinally axially coincident with the gripping surface, said radially expanded section carrying a connector nut engagement surface for fittingly engaging the internal engagement surface of the connector nut; wherein axial movement of the connector nut towards the connector both causes the internal engagement surface of the connector nut to apply axial and radial pressure on the connector nut engagement surface decreasing the removed radial section and facilitating movement of the central opening towards the cable to permit the gripping surface to grip the cable. 19. The cable connector as defined in claim 18, wherein the insert further includes a relief notch located in the radially expanded section and substantially longitudinally axially coincident with the gripping surface, said relief notch increasing along a relief are as the removed radial section decreases along a corresponding radial arc to facilitate movement of the central opening towards the cable permitting the gripping surface to grip the cable; wherein the relief notch of the insert is diametrically opposed from the removed radial section defining a first part and a second part of the insert; andwherein axial movement of the connector nut towards the connector body causes resilient relative movement of the first part towards the second part along the radial arc to collapse the central opening permitting the gripping surface to grip the cable. 20. A cable connector comprising: a connector nut having an internal engagement surface;a connector body axially movable relative to the connector nut and having an angled engagement surface;a grommet contained within the connector nut and the connector body, said grommet having a bore substantially therethrough, said bore having a cable opening for receiving a cable at a receiving end and an exit opening for the cable to exit at an exiting end, and,a resilient membrane located within the bore, said resilient membrane elastically deformable from a receiving position, before the cable is inserted into the bore, to an inverted position, after the cable is inserted into the bore;an insert contained within the connector nut and the connector body and located intermediate the connector nut and grommet, said insert having a central opening for receiving the cable, a gripping surface located within the central opening for gripping the cable, and a removed radial section facilitating movement of the central opening towards the cable to permit the gripping surface to grip the cable; andwherein axially moving the connector nut towards the connector body causes the internal engagement surface and the angled engagement surface to apply axial and radial pressure in the grommet;wherein the insert further includes a radially expanded section substantially longitudinally axially coincident with the gripping surface, said radially expanded section carrying a connector nut engagement surface for fittingly engaging the internal engagement surface of the connector nut;wherein axial movement of the connector nut towards the connector body causes the internal engagement surface of the connector nut to apply axial and radial pressure on the connector nut engagement surface decreasing the removed radial section and facilitating movement of the central opening towards the cable to permit the gripping surface to grip the cable;wherein the insert further includes a relief notch located in the radially expanded section and substantially longitudinally axially coincident with the gripping surface, said relief notch increasing along a relief arc as the removed radial section decreases along a corresponding radial arc to facilitate movement of the central opening towards the cable permitting the gripping surface to grip the cable, said relief notch of the insert being diametrically opposed from the removed radial section defining a first part and a second part of the insert;wherein axial movement of the connector nut towards the connector body causes resilient relative movement of the first part towards the second part along the radial arc to collapse the central opening permitting the gripping surface to grip the cable; andwherein the insert comprises an inserted portion adjacent the radially expanded portion, said inserted portion fitting into an orifice of the nut to orient the insert within the cable connector. 21. The cable connector as defined in claim 20, wherein said grommet comprises a tapered engagement surface at the exiting end for engaging the angled engagement surface of the connector body and the insert comprises a grommet engagement surface on the radially expanded section for engaging the grommet. 22. A kit comprising a cable connector as defined in claim 21, with at least one connector nut, at least one connector body, at least one insert, and at least one grommet having a circular opening and at least one grommet having a non-circular opening.