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Improvements in semi-rotary pumps. Edwin Charles Martin, Frederick Charles Pulsford, Ashwell And Nesbit, December 15, 1927: GB281906-A (1 worldwide citation)

281,906. Martin, E. C., Pulsford, F. C., and Ashwell &. Nesbit, Ltd. Feb. 28, 1927. Fixed-abutment type.-A semi-rotary pump having flap valves f, f in the oscillating vane d is provided with a readily removable inlet valve box g of segmental form which is fitted with mushroom type inlet valves h, h. ...


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Improvements in and relating to semi-rotary pumps.. Ashwell & Nesbit, Henry Phillips Pulsford, Edwin Charles Martin, December 31, 1919: GB136944-A (1 worldwide citation)

136,944. Ashwell & Nesbit, Pulsford, H. P., and Martin, E. C. Jan. 27, 1919. Fixed-abutment type; valves, distributing.- Relates to semi-rotary pumps in which the inlet valve is made to operate by the impinging of the rotor on the valve. According to the invention, a two-armed rotor c having ports c ...