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Gunnar Frithiof Kahlson
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Publication of GB189917947ApublicationCriticalpatent/GB189917947A/en
17,947. Kahlson, G. F. Sept. 5. Hinged valves.- A flap valve a is suspended from brackets d, by projections b from a prolongation c of the casing, so as to press lightly on its seat. A cover e serves to facilitate repairs and retain the projections b in place.
GB189917947D1899-09-051899-09-05Improvements in Flap Valves.
ExpiredGB189917947A
(en)