# US 11,114,220 B2 · Hollow insulator and method for production thereof

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- Number: US 11,114,220 B2
- Document ID: US11114220B2
- Status: Granted
- Kind: B2
- Application number: 16/092,229
- Filed: 2017-03-07
- Published: 2020-10-29
- Granted: 2021-09-07
- Earliest claimed: 2016-04-06
- Assignees: Siemens Aktiengesellschaft
- Applicants: Siemens Aktiengesellschaft
- Inventors: Lutz-Ruediger Jaenicke
- Web page: https://patentgrep.com/patent/US11114220B2

## CPC

- H01B 17/32: Single insulators consisting of two or more dissimilar insulating bodies
- H01B 17/14: Supporting insulators (pin insulators H01B17/20; apertured insulators H01B17/24)
- H01B 17/42: Means for obtaining improved distribution of voltage (capacitor-type lead-through insulators H01B17/28); Protection against arc discharges
- H01B 17/58: Tubes, sleeves, beads, or bobbins through which the conductor passes
- H01B 19/00: Apparatus or processes specially adapted for manufacturing insulators or insulating bodies {(manufacture of porcelain for electric insulation C04B33/26)}
- H01B 17/36: Insulators having evacuated or gas-filled spaces
- 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})

## Abstract

A hollow insulator for high electric voltages has an insulating tube and a covering of the insulating tube made from a fiber-reinforced plastic. The covering is placed on an outer surface of the insulating tube. There is also described a method for producing the type of hollow insulator.

## Claims

### Claim 1

A method for producing a hollow insulator for high electrical voltages, the method comprising:
manufacturing an insulating tube; and
sheathing the insulating tube with a fiber-reinforced plastic by arranging at least one prefabricated fiber mat around the insulating tube and then introducing plastic into the at least one fiber mat by a vacuum impregnation process.

### Claim 2 (depends on 1)

The method according to claim 1, which comprises manufacturing the insulating tube from a material selected from the group consisting of a ceramic material, a glass and a plastic.

### Claim 3 (depends on 1)

The method according to claim 1, wherein a flange is arranged at at least one end of the insulating tube prior to sheathing the insulating tube.

### Claim 4 (depends on 3)

The method according to claim 3, which comprises connecting the at least one flange to the insulating tube by cementing.

### Claim 5 (depends on 1)

The method according to claim 1, which comprises placing a flange at at least one end of the sheathing after sheathing the insulating tube.

### Claim 6 (depends on 5)

The method according to claim 5, which comprises connecting the at least one flange to the sheathing by an adhesive-bonding connection.

### Claim 7

A method for producing a hollow insulator for high electrical voltages, the method comprising:
manufacturing an insulating tube; and
sheathing the insulating tube with a fiber-reinforced plastic by filament-winding the fiber-reinforced plastic around the insulating tube in a wet or dry state.