Rotary expansible chamber devices – With mechanical sealing – Seal element between vane and cylinder
Patent
1974-12-02
1976-10-12
Vrablik, John J.
Rotary expansible chamber devices
With mechanical sealing
Seal element between vane and cylinder
418148, 418233, 418263, 418264, F01C 100, F01C 1902, F01C 2100, F04C 100
Patent
active
039854795
ABSTRACT:
A rotary piston pump comprises vanes mounted on shafts extending radially from a hub and travelling around an annular channel having a forwarding or pumping portion of circular cross section and a restricted sealing portion corresponding in cross section to the diametrical cross section of the vanes. Control means is provided for turning the vanes about radial axes so as to position the vanes approximately perpendicular to their direction of movement while passing through the forwarding portion of the channel and to turn them approximately 90.degree. so as to pass through the sealing portion of the channel in an edgewise position. At the ends of the forwarding portion the channel is connected respectively with inlet and outlet passageways. The control means include springs which permit the vanes to rotate in order to give way in the event that foreign bodies penetrate and have eccentrics and cam tracks, with cam rollers or cams if necessary.
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patent: 2619913 (1952-12-01), Longenecker
Adams Bruce L.
Burns Robert E.
Lobato Emmanuel J.
Vrablik John J.
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