Dual chamber pump
AssigneeAsti Sae
InventorYves Chevallier
Life of this patent
Estimating the term…
Abstract
The present invention provides an improved design for a mechanical pump. The pump is a dual chamber design typically including a pair of expandable bellows driven in a reciprocating fashion by a supply of pressurized air. The use of expandable bellows reduces wear on the pump thereby lengthening the required maintenance intervals in comparison with dual chamber diaphragm pumps previously known. Additionally, the pump is easily disassembled for inspection, cleaning or maintenance. Furthermore, the high strength of the pump's design makes it possible to manufacture the pump entirely of corrosion resistant materials.
Claims19
A pump comprising:
- a central core;
- first and second body members connected to said central core, each having an interior at least a portion of which defines a first and a second pumping chamber respectively;
- first and second driven members each including a deformable element disposed at least partially within a corresponding first and second pumping chamber respectively, said first and second driven members drivable between retracted and extended positions, and said deformable elements deformable in response thereto;
- a fluid inlet and a fluid outlet in fluid communication with each of said first and second pumping chambers fluid inlet and outlet valves between respective fluid inlet and fluid outlets and the interior of each pump body member;
- means operative to drive each of said first and second driven members alternately between its respective retracted and extended positions, whereby fluid is alternately drawn into one of said first and second pumping chambers and simultaneously expelled from the other through respective fluid inlets and fluid outlets;
- all elements of said pump being of a formable, nonmetallic material which is resistant to chemical corrosion.
A pump according to 1 wherein said formable material comprises a material selected from the group consisting of PFA, PTFE, PVDF, PEEK and FEP.
Dependencies are inferred from the claim text.