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US 2001/0033802 A1Published application
Double rotor-vane pump
OwnerDavid Allan Boldenowinventor
Life of this patent
Estimating the term…
Abstract
Two rotary vane pumps driven by a common drive shaft with each pump sharing a common intake. Each pump's rotor is connected to the drive shaft by shear means. A valve is utilized to seal off a failed pump, and to protect the operating pump from foreign objects created by the failed pump. If either rotary vane pump fails its shear means, the other pump continues to operate unaffected, and maintains nominal pump performance.
Claims20
A vane-type pump intended for the pumping of gaseous substances which incorporates two independent pumping chambers, each incorporating a rotor and vanes;
- both rotors being coupled to a single driving shaft in such a manner that a increase in opposition to rotation by either rotor beyond a predetermined limit will cause said rotor to be disconnected from the driving shaft and allow the other pumping chamber to continue to pump without degradation to the functional chamber's pumping capability.
A double pump including
- a first rotary pump,
- a second rotary pump,
- a drive-shaft for driving both said first and second rotary pumps and defining a rotational axis,
- a first rotor for said first pump driven by said drive shaft by an area of matching features between said first rotor and said drive shaft,
- a second rotor for said second pump driven by said drive shaft by an area of matching features between said second rotor and said drive shaft,
- a intake common to said first and second rotary pumps,
- means such as reed valves or a shuttle valve to restrict flow direction from said intake.
4 more elements
A double pump including
- a first rotary pump,
- a second rotary pump,
- a drive-shaft for driving both said first and second rotary pumps and defining a rotational axis,
- a first rotor for said first pump driven by said drive shaft by a shear-pin or key between said first rotor and said drive shaft,
- a second rotor for said second pump driven by said drive shaft by a shear-pin or key between said second rotor and said drive shaft,
- a intake common to said first and second rotary pumps,
- means such as reed valves or a shuttle valve to restrict flow direction from said intake.
4 more elements
Dependencies are inferred from the claim text.