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US Patent: 44,358
Improvement in hydraulic jacks
Patentee:
Thomas H. Watson - New York, NY

USPTO Classifications:
60/482

Tool Categories:
industrial tools : hydraulic jacks

Assignees:
None

Manufacturer:
E. Lyon & Co. - New York, NY

Witnesses:
Benjamin Davis
Albert Bauman

Patent Dates:
Granted: Sep. 20, 1864

Patent Pictures:
USPTO pdf tiff
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"Vintage Machinery" entry for Watson-Stillman Co. (E. Lyon & Co.)
"Vintage Machinery" entry for Richard Dudgeon
Description:
"The nature of my invention consists in providing a reservoir holding fluids sufficient, when forced into the cylinder of the jack, to push the ram out is entire length when it is in a horizontal position, which is not accomplished by the hydraulic jacks now in use and described in Fig. 1, in which the force-pump is in the center of the reservoir, and when the jack is in a horizontal position half the contents of the reservoir is below the center of the pump and cannot run into and supply it with water sufficient to more than one-third fill the cylinder..." This patent acknowledges patent 8,203, which was granted to Richard Dudgeon who at the time was working for Thomas H. Watson's stepfather, Eliphalet Lyon.

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