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US 3,987,707 AGranted
Multiple-unit pump
AssigneeRobert Bosch GmbH
InventorPaul Bosch
Life of this patent
Estimating the term…
Abstract
The multiple-unit pump of this invention has two coaxial pumps each including a rotatable body. One of the bodies is mounted for rotation on a stationary shaft; a second shaft extends through the stationary shaft and carries intermediate the two rotatable bodies a coupling member which rotates with the second shaft and which is provided with recesses into which projections on the two bodies extend, so that the bodies are caused to rotate when the second shaft is rotated.
Claims10
A multiple-unit pump, comprising a housing;
- a first and at least one coaxial second pump unit in said housing, at least said first pump unit being a radial piston pump having a fixedly mounted first cantilevered supporting shaft, a cylinder body rotatably mounted on said first supporting shaft and provided with radial cylinder bores, and pistons reciprocable in said cylinder bores, said second pump unit having a fixedly mounted second cantilevered supporting shaft and a rotary body coaxial with said cylinder body, rotatably mounted on said second supporting shaft and having a fluid chamber means;
- an axial bore in said first supporting shaft of said first pump unit;
- a drive shaft for said second pump unit extending through said axial bore;
- a coupling member mounted on said drive shaft for rotation therewith and being located between said first and second supporting shafts and intermediate said cylinder body and said rotary body;
- cooperating coupling portions on said coupling member and said bodies so that said coupling member and said bodies rotate jointly;
- and means communicating said bores and chamber means with the exteriors of said bodies for admission and discharge of fluid being pumped.
3 more elements
Dependencies are inferred from the claim text.