GB1604202A - Cable clamping and sealing device - Google Patents

Description

(54) A CABLE CLAMPING AND SEALING DEVICE (71) We, HAWKE CABLE GLANDS LIMITED, a British Company of Oxford Street West, Ashton-under-Lyne, Lancashire do hereby declare the invention, for which we pray that a patent may be granted to us, and the method by which it is to be performed, to be particularly described in and by the following statement: This invention relates to a cable clamping and sealing device.

According to the invention there is provided a cable clamping and sealing device comprising a hollow body, a separate sleeve adapted to be received in said body, one end of the sleeve being provided with axially extending slots so that said one end is deformable radially inwardly, a sealing ring disposed within the deformable part of the sleeve, and positioned in place in the sleeve by a flange on the sleeve extending over one end of the sealing ring or by a flange on the sealing ring extending over one end of the sleeve, means engageable with the body to cause deformation of the deformable part of the sleeve radially inwardly to urge the sealing ring into clamping and sealing engagement with a cable.

In a preferred embodiment of the invention the sleeve is made of plastics material.

The deformable end of the sleeve has a plurality of axially extending slots formed therein which may extend parallel to the longitudinal axis of the sleeve or may be inclined, for example . the slots may be helical.

Specific embodiments of the invention will now be described by way of example with reference to the accompanying drawings in which: Figure 1 is an axial section through a clamping and sealing device; Figure 2 is an axial section through a modified form of sleeve; Figure 3 illustrates, diagrammatically, another form of clamping and sealing device; Figure 4 is a modified arrangement of the kind of device shown in Figure 3; Figure 5 is an axial section through an armour clamping cable gland including the clamping and sealing device of the present invention; Figure 6 illustrates diagrammatically a gland for use with filler compound which includes the present invention; Figure 7 shows another form of gland of the general kind shown in Figure 6; and Figure 8 shows a modification, on an enlarged scale, of a part of the gland of Figure 6.

In the drawings like parts of different embodiments are given the same reference numerals.

The clamping and sealing device comprises a tubular body 16 having a counterbore 18. A seal 19 of the kind known per se is located in between the base of the counterbore and a sleeve 20. The sleeve 20 is of circular internal cross section and the sleeve is preferably formed of plastics or other deformable material. One end of the sleeve is axually slotted as at 12 and is provided internally with a counterbore in which a sealing ring 14 of, for example neoprene, is disposed. The seal 19 is not essential. An internally tapered cap 22 is threadedly engageable with the body whereby when the cap is tightened the deformable end of the sleeve 20 is urged radially inwardly and clamps the seal 14 onto the cable 24.

The sleeve of the clamping device of the invention may for example have a flange extending over one end of the sealing ring as shown in Figure 1 or be as illustrated in Figure 2 wherein the sleeve is not provided with a counterbore and wherein the seal 14 has an external flange 26 at one end which extends over the end of the sleeve.

Referring now to Figure 3 the body 30 is internally tapered at 70. A sleeve 72 has one end 74 split and thereby deformable. The end 74 is internally covered by sealing ring 76 of resilient material and is received in the tapered end of the body 30. The sleeve 72 is urged into the body 30 by a cap 78 threadedly engageable with the body, the inturned flanged end of which engages a circlip 80 on the sleeve 72.

The embodiment of Figure 4 is similar to that of Figure 3 except that the sleeve 72 is like that illustrated in Figure 2 but with an external flange 82 engageable by the cap 78.

Figure 5 illustrates a known form of armour clamping gland comprising a body 30 and a cap 90 which engage together together to urge armour clamping rings 92 and 94 together and deform a seal 96 of known form into engagement with the inner sheath of a cable 100.

An internal rebate 102 is formed at the end of the cap 90 which receives a sleeve 104 such as is illustrated in Figure 2. The sleeve 104 is inwardly deformed by the internally tapered surface 106 of an end cap 108 engageable with cap 90. If desired the ring 94 and seal 96 may be replaced by a sleeve as shown in Figure 1 to the invention.

Figure 6 illustrates how the clamping device of the invention may be combined with compound filled barrier glands of the kind described in our British Patent Specification No. 1528348. The body 30 is fitted with a lining 110 which is located in the body counterbore and a second lining 112 the out-turned flange 114 of which is located in the lining 110 and on the base of the counterbore. The right hand end (as viewed in the drawing) of the lining 110 is internally tapered as at 116 and receives therein a sleeve 118 similar to that illustrated in Figure 2. The sleeve 118 is urged into the tapered end 116 of the lining 110 by a cap 120 engageable with the body.

The embodiment of Figure 7 is similar to that of Figure 6 except that instead of being internally tapered the lining 110 is provided with a rebate which receives the sleeve 118.

Deformation of the sleeve in this embodiment is produced by the internally tapered surface 122 of the cap 120.

As shown in Figure 8 the outer surface of the sleeve 118 may be barbed as at 124 and the barbs engaged by an internally directed pawl 126 formed on the lining 110. That arrangement assists in locking the sleeve in position.

WHAT WE CLAIM IS: 1. A cable clamping and sealing device comprising a hollow body, a separate sleeve adapted to be received in said body, one end of the sleeve being provided with axially extending slots so that said one end is deformable radially inwardly, a sealing ring disposed within the deformable part of the sleeve, and positioned in place in the sleeve by a flange on the sleeve extending over one end of the sealing ring or by a flange on the sealing ring extending over one end of the sleeve, means engageable with the body to cause deformation of the deformable part of the sleeve radially inwardly to urge the sealing ring into clamping and sealing engagement with a cable.

2. A device as claimed in Claim 1, wherein the slots extend parallel to the longitudinal axis of the sleeve.

3. A device as claimed in Claim 1 or Claim 2, wherein the sleeve is received in a counterbore in said body.

4. A device as claimed in any preceding claim, wherein the means engageable with the body comprises a cap threadedly engageable with the body.

5. A device as claimed in Claim 4, wherein the cap is internally tapered, deformation of the sleeve being effected by the said tapered part of the cap bearing on the sleeve.

6. A device as claimed in Claim 4, wherein the body is internally tapered, deformation of the sleeve being effected by tightening the cap on the body thereby urging the sleeve into contact with the said internally tapered part of the body.

7. A device as claimed in any preceding claim wherein a shoulder is provided at the non-deformable end of the sleeve.

8. A cable clamping and sealing device substantially as described herein with reference to Figure 1, Figure 1 as modified by Figure 2, Figure 3, Figure 4, Figure 5, Figure 6, Figure 6 as modified by Figure 8 or Figure 7 of the accompanying drawings.

**WARNING** end of DESC field may overlap start of CLMS **.

Claims (8)

**WARNING** start of CLMS field may overlap end of DESC **. end 74 split and thereby deformable. The end 74 is internally covered by sealing ring 76 of resilient material and is received in the tapered end of the body 30. The sleeve 72 is urged into the body 30 by a cap 78 threadedly engageable with the body, the inturned flanged end of which engages a circlip 80 on the sleeve 72. The embodiment of Figure 4 is similar to that of Figure 3 except that the sleeve 72 is like that illustrated in Figure 2 but with an external flange 82 engageable by the cap 78. Figure 5 illustrates a known form of armour clamping gland comprising a body 30 and a cap 90 which engage together together to urge armour clamping rings 92 and 94 together and deform a seal 96 of known form into engagement with the inner sheath of a cable 100. An internal rebate 102 is formed at the end of the cap 90 which receives a sleeve 104 such as is illustrated in Figure 2. The sleeve 104 is inwardly deformed by the internally tapered surface 106 of an end cap 108 engageable with cap 90. If desired the ring 94 and seal 96 may be replaced by a sleeve as shown in Figure 1 to the invention. Figure 6 illustrates how the clamping device of the invention may be combined with compound filled barrier glands of the kind described in our British Patent Specification No. 1528348. The body 30 is fitted with a lining 110 which is located in the body counterbore and a second lining 112 the out-turned flange 114 of which is located in the lining 110 and on the base of the counterbore. The right hand end (as viewed in the drawing) of the lining 110 is internally tapered as at 116 and receives therein a sleeve 118 similar to that illustrated in Figure 2. The sleeve 118 is urged into the tapered end 116 of the lining 110 by a cap 120 engageable with the body. The embodiment of Figure 7 is similar to that of Figure 6 except that instead of being internally tapered the lining 110 is provided with a rebate which receives the sleeve 118. Deformation of the sleeve in this embodiment is produced by the internally tapered surface 122 of the cap 120. As shown in Figure 8 the outer surface of the sleeve 118 may be barbed as at 124 and the barbs engaged by an internally directed pawl 126 formed on the lining 110. That arrangement assists in locking the sleeve in position. WHAT WE CLAIM IS:

1. A cable clamping and sealing device comprising a hollow body, a separate sleeve adapted to be received in said body, one end of the sleeve being provided with axially extending slots so that said one end is deformable radially inwardly, a sealing ring disposed within the deformable part of the sleeve, and positioned in place in the sleeve by a flange on the sleeve extending over one end of the sealing ring or by a flange on the sealing ring extending over one end of the sleeve, means engageable with the body to cause deformation of the deformable part of the sleeve radially inwardly to urge the sealing ring into clamping and sealing engagement with a cable.

2. A device as claimed in Claim 1, wherein the slots extend parallel to the longitudinal axis of the sleeve.

3. A device as claimed in Claim 1 or Claim 2, wherein the sleeve is received in a counterbore in said body.

4. A device as claimed in any preceding claim, wherein the means engageable with the body comprises a cap threadedly engageable with the body.

5. A device as claimed in Claim 4, wherein the cap is internally tapered, deformation of the sleeve being effected by the said tapered part of the cap bearing on the sleeve.

6. A device as claimed in Claim 4, wherein the body is internally tapered, deformation of the sleeve being effected by tightening the cap on the body thereby urging the sleeve into contact with the said internally tapered part of the body.

7. A device as claimed in any preceding claim wherein a shoulder is provided at the non-deformable end of the sleeve.

8. A cable clamping and sealing device substantially as described herein with reference to Figure 1, Figure 1 as modified by Figure 2, Figure 3, Figure 4, Figure 5, Figure 6, Figure 6 as modified by Figure 8 or Figure 7 of the accompanying drawings.