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US Patent: RE10,557
Throttle Valve
Patentee:
Edmund Lunkenheimer (exact or similar names) - Cincinnati, OH

USPTO Classifications:
251/101

Tool Categories:
wrenches : auxiliary wrenches

Assignees:
None

Manufacturer:
Not known to have been produced

Witnesses:
Chas. Anderson
E. C. Pollock
R. M. Christopher

Patent Dates:
Applied: Nov. 11, 1884
Granted: Feb. 03, 1885

Patent Pictures:
Edmund Lunkenheimer reissue patent October 3, 1885
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Description:
Throttle valve for steam engines; the valve faces are machined to prevent leakage. The threaded hexagon cap eases the gate valve off and on the valve seat. The patent calls the operating lever a wrench.

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