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All Patents in class 251/263
Patents 1 - 10 of 10
First set of recordsLast set of records
NumberDatePatenteeTitleType
86,346Feb. 02, 1869J. AshcroftSafety Valvesteam safety valves
453,012May 26, 1891J.F. LonerganCock or faucetfaucets
530,508Dec. 11, 1894H.T. DawsonGas Enginegas and gasoline engines
818,714Apr. 24, 1906H.J. SmithValve Mechanism for Gas Enginesinternal combustion engine valves
1,142,853Jun. 15, 1915L. Skinner, E.F. WilliamsSteam Engine Valve Gearsteam engine valve gear
1,678,905Jul. 31, 1928M.J. GoldbergPressure Relief Meanscompressor relief valves
2,275,624Mar. 10, 1942A.G. HannControl Deviceflow controls
2,620,823Dec. 09, 1952R.D. Wortendyke, R.R. AdamsTracer Valve Mechanism with Dashpothydraulic apparatus
2,903,234Sep. 08, 1959H. Steinhauer, V.v. SundtTimed Valve with Cam Actuatormetalworking machine mechanisms
4,789,001Dec. 06, 1988L.W. Durham, B.S. BackeOperating System for a Valve
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