Rotary vane pump with carbon/carbon vanes
AssigneeSigma-Tek, LLC
InventorsJerry B. Bishop, Francis A. Schwind, David B. Sawyer
Life of this patent
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Abstract
A rotary sliding vane pump having vanes fabricated from a carbon/carbon based material that provides improved performance by inhibiting vane wear, chipping or fracture. The advantages provided by carbon/carbon based materials may be further enhanced by impregnating each carbon/carbon sliding vane with a teflon based coating.
Claims4
An improved sliding vane rotary pump having a metallic liner and a cylindrical rotor, the rotor including a plurality of radial sliding vane slots, comprising:
- at least one carbon/carbon sliding vane disposed in a slot to engage said liner for the pumping of a fluid through the rotary pump, the carbon/carbon vane comprising a plurality of layers laminated together from a non-metallic composite material of carbon or carbon graphite fibers held in a densified carbon matrix to form each layer.
An improved sliding vane rotary pump having a metallic liner and a cylindrical rotor, the rotor including a plurality of radial sliding vane slots, comprising:
- at least one carbon/carbon sliding vane disposed in a slot to engage said liner for the pumping of a fluid through the rotary pump, each vane comprising a plurality of layers laminated together from a non-metallic composite material of carbon or carbon graphite fibers held in a densified carbon matrix and impregnated with a TEFLON.RTM. based coating to form each layer.
An improved sliding vane rotary pump having a metallic liner and a cylindrical rotor, the rotor including a plurality of radial sliding vane slots therein, comprising:
- at least one carbon/carbon sliding vane disposed in a slot to engage said liner for the pumping of a fluid through the rotary pump, each vane comprised of a plurality of laminated layers of woven densified carbon/carbon material of carbon fibers held in a matrix to form each layer, each vane surface having a TEFLON.RTM. based coating for inhibiting deterioration of the vane as the vane slides in the slot during the pumping of the fluid.
Dependencies are inferred from the claim text.