# US 4,397,624 A · Device for rendering a cable longitudinally watertight

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- Number: US 4,397,624 A
- Document ID: US4397624A
- Status: Granted
- Kind: A
- Application number: 06/315,702
- Filed: 1981-10-28
- Granted: 1983-08-09
- Earliest claimed: 1980-10-30
- Assignees: U.S. Philips Corporation
- Inventors: Antonius P. Haverkamp; Klaas W. Kerkhof
- Web page: https://patentgrep.com/patent/US4397624A

## CPC

- H01B 13/323: {using a filling or coating head}
- H01B 7/285: by completely or partially filling interstices in the cable
- Y02A 30/14: Extreme weather resilient electric power supply systems, e.g. strengthening power lines or underground power cables
- H01B: CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES (selection for magnetic properties H01F1/00; waveguides H01P {; printed circuits H05K})
- Y02A: TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE

## Abstract

A device for rendering cables such as electric cables, telecommunication cables, optical cables, longitudinally watertight by the block-wise application of a sealing compound into the cable core by means of an intermittently displaceable nozzle which is periodically displaced by a driving element, the speed of the driving element being synchronized with the linear speed of the cable core.

## Claims

### Claim 1

A device for rendering a cable comprising a stranded core longitudinally watertight by the block-wise application under pressure of sealing material in and around the stranded cable core, while said cable core is longitudinally advancing, said device comprising an injection head which can be intermittently displaced in the longitudinal direction of the cable by means of a guide in synchronism with the speed of advancement of the cable core and which also comprises a feed-through chamber which is connected to a supply duct for the sealing material, the supply of which material is dosed by means of a supply valve, characterized in that the synchronized controlled displacements of the injection head are provided in the device by a drive mechanism comprising a driving element which is coupled to the injection head and which is controlled by a pneumatic unit connected to a compressed air duct including a control valve.

### Claim 2 (depends on 1)

A device as claimed in claim 1, characterized in that the driving element is a clamping means which intermittently cooperates with the cable core to be rendered longitudinally watertight.

### Claim 3 (depends on 1)

A device as claimed in claim 1, characterized in that the driving element is formed by a driven piston means of the pneumatic unit.

### Claim 4 (depends on 3)

A device as claimed in claim 3, characterized in that it comprises a throttling valve which is arranged in the compressed air duct between the control valve and the pneumatic unit and which is controlled by a wheel which senses the cable core.

### Claim 5 (depends on 4)

A device as claimed in claim 4, characterized in that the throttling valve comprises a vent duct.

### Claim 6 (depends on 1, 2, 3, 4, 5)

A device as claimed in any of the claims 1 to 5, characterized in that the injection head comprises a nozzle with a pressure chamber which is connected to the supply duct and which communicates with the feed-through chamber.