Peristaltic pump
AssigneeCole-Parmer Instrument Company
InventorLawrence R. Hogan
Life of this patent
Estimating the term…
Abstract
A peristaltic pump is disclosed which includes a base plate having a pair of reaction members pivotally mounted thereon for movement between open positions spaced outwardly from a rotor about which a compressible flow tube is disposed and closed positions maintaining the flow tube in predetermined relation to the rotor. Each reaction member has a shield plate thereon adapted for cooperation with the shield plate on the other reaction member so as to substantially cover the rotor area when the reaction members are in their closed positions. A locking nut mounted on the base plate is adapted for camming cooperation with the reaction members to draw them into predetermined closed relation relative to the tube and rotor.
Claims16
In a peristaltic pump which includes a base plate, a rotor rotatably supported on the base plate and having at least two compression surfaces rotatable therewith through a predetermined path, and a pair of reaction members pivotably mounted on said base plate for movement relative to said base plate between open positions spaced from said rotor to facilitate loading and removal of a compressible fluid flow tube relative to said rotor, and closed positions operative to maintain the flow tube in position so that said compression surfaces effect a peristaltic pumping action on said tube during rotation of said rotor;
- the improvement wherein each of said reaction members includes a shield plate cooperable with the shield plate on the other of said reaction members so as to substantially cover said rotor when said reaction members are in their said closed positions, and means operatively associated with said base plate and selectively cooperable with said reaction members to maintain said reaction members in their said closed positions.
In a peristaltic pump which includes a base plate, a rotor rotatably supported on the base plate and having at least two compression surfaces rotatable therewith through a predetermined path, and a pair of reaction members pivotably mounted on said base plate for movement relative to said base plate between open positions spaced from said rotor to facilitate loading and removal of a compressible fluid flow tube relative to said rotor, and closed positions operative to maintain the flow tube in position so that said compression surfaces effect a peristaltic pumping action on said tube during rotation of said rotor;
- the improvement wherein said reaction members define mutually cooperable cam surfaces thereon, and including a cam locking nut mounted on said base plate for selective adjustment relative to said reaction members, said cam locking nut being simultaneously cooperable with said cam surfaces on said reaction members and operable to bias said reaction members toward their said closed positions.
Dependencies are inferred from the claim text.