F - Mech Eng,Light,Heat,Weapons – 04 – B
Patent
F - Mech Eng,Light,Heat,Weapons
04
B
103/31
F04B 43/12 (2006.01)
Patent
CA 1156872
ABSTRACT A roller pump in which one or more hoses is compressed against an arcuate stator bearing surface by a plurality of rollers carried by a rotating rotor. A shim is provided in generally opposing relation to the stator bearing surface to impart a hose compression offset force to the rotor. In this manner, the forces imparted to the rotor remain substantially constant through- out its rotation. In a preferred embodiment, a liner, which may be unitary with the shim, overlies the hoses to be compressed by the rotor to compensate for dimensional variations between the rotor rollers and for variations in the bearing surface and the hoses themselves. The thickness of the shim, at its region of greatest thickness, approximates the combined thickness of the hose, when fully compressed, and the compensating liner. Tabs are provided to extend from the shim to assist in maintaining the shim and liner in proper orientation relative to the hoses to be compressed.
372740
Medtronic Inc.
Smart & Biggar
LandOfFree
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