Description
NON-POSITIVE-DISPLACEMENT PUMPS
F04D
Technology
Stats
- 16,368 US PATENTS IN FORCE
- 6,491 US APPLICATIONS PENDING
- 3,391 Total Patent Owners
- 36,158 TOTAL INVENTORS
Subclasses
| Subclass | Title |
|---|---|
| 1/00 | Radial-flow pumps, e.g. centrifugal pumps; Helico-centrifugal pumps (adapted for pumping specific fluids F04D 7/00; priming or boosting F04D 9/00; pumping liquids and elastic fluids at the same time F04D 31/00) |
| 1/02 | Radial-flow pumps, e.g. centrifugal pumps; Helico-centrifugal pumps (adapted for pumping specific fluids F04D 7/00; priming or boosting F04D 9/00; pumping liquids and elastic fluids at the same time F04D 31/00) having non-centrifugal stages, e.g. centripetal |
| 1/04 | Radial-flow pumps, e.g. centrifugal pumps; Helico-centrifugal pumps (adapted for pumping specific fluids F04D 7/00; priming or boosting F04D 9/00; pumping liquids and elastic fluids at the same time F04D 31/00) Helico-centrifugal pumps |
| 1/06 | Radial-flow pumps, e.g. centrifugal pumps; Helico-centrifugal pumps (adapted for pumping specific fluids F04D 7/00; priming or boosting F04D 9/00; pumping liquids and elastic fluids at the same time F04D 31/00) Multi-stage pumps (F04D 1/02 takes precedence) |
| 1/08 | Radial-flow pumps, e.g. centrifugal pumps; Helico-centrifugal pumps (adapted for pumping specific fluids F04D 7/00; priming or boosting F04D 9/00; pumping liquids and elastic fluids at the same time F04D 31/00) Multi-stage pumps (F04D 1/02 takes precedence) the stages being situated concentrically |
| 1/10 | Radial-flow pumps, e.g. centrifugal pumps; Helico-centrifugal pumps (adapted for pumping specific fluids F04D 7/00; priming or boosting F04D 9/00; pumping liquids and elastic fluids at the same time F04D 31/00) Multi-stage pumps (F04D 1/02 takes precedence) with means for changing the flow-path through the stages, e.g. series/parallel |
| 1/12 | Radial-flow pumps, e.g. centrifugal pumps; Helico-centrifugal pumps (adapted for pumping specific fluids F04D 7/00; priming or boosting F04D 9/00; pumping liquids and elastic fluids at the same time F04D 31/00) Pumps with scoops or like paring members protruding in the fluid circulating in a bowl |
| 1/14 | Radial-flow pumps, e.g. centrifugal pumps; Helico-centrifugal pumps (adapted for pumping specific fluids F04D 7/00; priming or boosting F04D 9/00; pumping liquids and elastic fluids at the same time F04D 31/00) Pumps raising fluids by centrifugal force within a conical rotary bowl with vertical axis |
| 3/00 | Axial-flow pumps (priming or boosting F04D 9/00; pumping liquids and elastic fluids at the same time F04D 31/00) |
| 3/02 | Axial-flow pumps (priming or boosting F04D 9/00; pumping liquids and elastic fluids at the same time F04D 31/00) of screw type |
| 5/00 | Pumps with circumferential or transverse flow (pumping liquids and elastic fluids at the same time F04D 31/00) |
| 7/00 | Pumps adapted for handling specific fluids, e.g. by selection of specific materials for pumps or pump parts (pumping liquids and elastic fluids at the same time F04D 31/00) |
| 7/02 | Pumps adapted for handling specific fluids, e.g. by selection of specific materials for pumps or pump parts (pumping liquids and elastic fluids at the same time F04D 31/00) of centrifugal type |
| 7/04 | Pumps adapted for handling specific fluids, e.g. by selection of specific materials for pumps or pump parts (pumping liquids and elastic fluids at the same time F04D 31/00) of centrifugal type the fluids being viscous or non-homogeneous |
| 7/06 | Pumps adapted for handling specific fluids, e.g. by selection of specific materials for pumps or pump parts (pumping liquids and elastic fluids at the same time F04D 31/00) of centrifugal type the fluids being hot or corrosive, e.g. liquid metal |
| 7/08 | Pumps adapted for handling specific fluids, e.g. by selection of specific materials for pumps or pump parts (pumping liquids and elastic fluids at the same time F04D 31/00) of centrifugal type the fluids being radioactive |
| 9/00 | Priming; Preventing vapour lock |
| 9/02 | Priming; Preventing vapour lock Self-priming pumps |
| 9/04 | Priming; Preventing vapour lock using priming pumps; using booster pumps to prevent vapour lock |
| 9/06 | Priming; Preventing vapour lock using priming pumps; using booster pumps to prevent vapour lock of jet type |
Recent Patents
Not Available
Recent Publications
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Top Owners in This Class
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Applications Filed in This Class - By Year
Patents Issued To Date - By Filing Year
Average Time to Issuance
- 37 Months (last 2 years Issuances)
- 37 Months (last 5 years Issuances)