GB Patent: GB-190,321,776
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| A New or Improved Internal Pipe Wrench
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Patentee:
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| Emanuel Freytag (exact or similar names) - Hamburg, German |
| Manufacturer: |
| Not known to have been produced |
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Patent Dates:
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| Applied: |
Oct. 09, 1903 |
| Granted: |
Feb. 04, 1904 |
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Patent Pictures:
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Emanuel Freytag patent Oct. 9, 1903 - edited from "Abridgments of Specifications" |
Espacenet patent
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Stan Schulz
GB-190321776 in ESPACENET
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Description: |
| Abstract: "An internal pipe wrench for inserting and removing screwed boiler tubes &c., consists of a shaft, and a fixed grooved disc E and two loose serrated discs D, F, mounted eccentrically on the shaft, which is also fitted with a guiding or steadying collar B, and with a squared end for the reception of a cranked handle &c. The eccentricity of the serrated-edged discs causes the tube to be gripped when the shaft is first rotated."
Note: Early British patents (pre 1916) were numbered by the year and started at patent #1 at the start of each year in January. The patent # used in DATAMP represents the year of registration and the patent # (with "leading zeros" interposed to make the number total nine digits). This patent is #21,776 of the year 1903. |
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