281906-A is referenced by 1 patents.
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. The inlet valves h, h and their seatings are preferably of spherical form and the valve stems i are guided in arms k secured to the valve box. The valve box is located by a pin l in the casing and is provided with felt packing m where the partition contacts with the vane spindle.