Scale removal device
OwnerEizo Nishinoinventor
Life of this patent
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Abstract
A scale removal device for scraping off scale deposited on the inner surface of a tube section comprising a rotary shaft to be received within said tube section for advancement and rotation under the action of fluid under pressure pumped into the tube section and having a spiral blade thereabout, a scraper head detachably connected to the leading end of said rotary shaft and having resilient scraper blades thereabout for yieldingly abutting against the inner surface of said tube section and connector means detachably connecting said rotary shaft and scraper head.
Claims6
A scale removal device for scraping scale from the inner surface of tube sections, comprising, in combination,
- a rotary shaft to be received coaxially in a tube section to be scraped,
- a spiral blade secured to and around said shaft and extending along a substantial portion of the length of said shaft,
- a center bore extending into a leading end of the shaft,
- a scraper head having a plurality of resilient scraper blades extending radially outwardly and rearwardly in yielding abutment against the inner surface of the tube section,
- said spiral blade and said scraper blades being of opposite hand,
- and connector means detachably longitudinally connecting said scraper head to said rotary shaft for joint advancement and opposite rotation.
Dependencies are inferred from the claim text.