US Patent: 483,920 - Tool for expanding the ends of boiler-tubes


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US Patent: 483,920

Tool for expanding the ends of boiler-tubes

Patentee:

August L. Henderer (exact or similar names) - Wilmington, DE

USPTO Classifications:

72/122

Tool Categories:

specialty tools : pipe and tube expanders

specialty tools : boiler repair tools

trade specific : boilermaker

Assignees:

None

Manufacturer:

A. L. Henderer & Co. - Wilmington, DE

Witnesses:

Myron C. Henderer

Hector Hannam

Patent Dates:
Applied:	Dec. 15, 1891
Granted:	Oct. 04, 1892

Patent Pictures:

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Vintage Machinery entry for Henderer Brothers

Description:

This patent does not mention Z. Ferguson's patent 260,555 but that patent had been licensed by A. L. Henderer & Co., and this Henderer patent is clearly an improvement on the Ferguson patent.