Rotary expansible chamber devices – With mechanical sealing – Axially movable end wall or end wall portion
Reexamination Certificate
2005-05-03
2005-05-03
Trieu, Theresa (Department: 3748)
Rotary expansible chamber devices
With mechanical sealing
Axially movable end wall or end wall portion
C418S201100, C418S203000
Reexamination Certificate
active
06887055
ABSTRACT:
A positive-displacement rotary pump comprising a pair of meshing gears (13, 14) or rotors, consisting of a driving gear and a driven gear, contained in a shell (10) having an output opening and an intake opening for a fluid. The gears (13, 14) include shafts (23, 24) which are supported by bushings (15a,15b) having two faces (17a,17b) which are subjected, in use, to pressures which bring about an axial load on the bushing itself, wherein the resultant of the axial loads (S′, S″) on the two bushings has a predetermined direction so as to move the bushings (15a,15b) and the gears (13, 14) as a whole into close abutment with a predetermined reference plane (VI—VI).
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“Sulla Portata delle pompe ad ingranaggi” (About Rate Flow of Gear Pumps) , Dr. Ing. Claudio Bonacini,L'Ingegnere, 1961, No. 9, pp. 1-8, and English translation of summary therof.
Flynn ,Thiel, Boutell & Tanis, P.C.
Trieu Theresa
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