Device for throttling a fluid flow, and corresponding piston pump for delivering fluids

Patent metadata

Field	Value
Publication number	US-9273673-B2
Application number	US-201113819990-A
Country	US
Kind code	B2
Filing date	Jul 6, 2011
Priority date	Sep 2, 2010
Publication date	Mar 1, 2016
Grant date	Mar 1, 2016

Abstract

A device for throttling a fluid flow includes a basic body which has at least one throttle point with a predefinable opening cross section. The basic body has a resilient configuration at least in a region of the at least one throttle point. Accordingly, the opening cross section of the at least one throttle point is configured to be set in a variable manner as a function of a pressure difference.

First claim

The invention claimed is:

1. A piston pump for delivering fluids, comprising:
a piston;
a cylinder element;
a pressure chamber arranged between an inlet valve and an outlet valve; and
a throttling mechanism configured to throttle a fluid flow and arranged downstream of the outlet valve in the fluid flow, wherein the throttling mechanism is a device including:
a basic body which includes at least one throttle point having a predefinable opening cross section, wherein the basic body is an open ring having at least one pair of spring arms each pair forming arcs of an imaginary circle, so that the opening cross section of the at least one throttle point is defined on the circumference of the imaginary circle between free ends of the spring arms and is variably adjustable as a function of a pressure difference.

2. The piston pump as claimed in claim 1 , wherein the device is placed between two flat surfaces of the cylinder element and the cover.

3. The piston pump of claim 1 wherein the at least one throttle point has at least one of a minimum opening cross section and a maximum opening cross section independent of the pressure difference.

4. The piston pump of claim 1 , wherein the minimum opening cross section of the at least one throttle point is optimized to a volume flow within a predetermined temperature range.

5. The piston pump of claim 1 , wherein a dynamic behavior of the opening cross section of the at least one throttle point is configured to change during pressure difference changes according to at least one of selected spring characteristics, a selected structural shape of the basic body, and a selected structural shape of the at least one throttle point.

6. The piston pump of claim 1 , wherein the basic body has a centering lobe configured to enable positionally correct installation.

7. The piston pump of claim 1 , wherein the basic body is at least one of a round wire, a flat wire, and a flat plate.

Assignees

• Fellmeth Reiner
• Haecker Juergen
• Gaertner Oliver
• Jahn Heiko
• Schuller Wolfgang
• Stotz Rolf
• Bosch Gmbh Robert

Inventors

• Fellmeth Reiner
• Haecker Juergen
• Gaertner Oliver
• Jahn Heiko
• Schuller Wolfgang
• Stotz Rolf

Classifications

• F16K15/141

  the closure elements not being fixed to the valve body · CPC title

• F04B1/0452 Primary

  Distribution members, e.g. valves (machines or pumps with cam-actuated distribution members at the outer ends of the cylinders F04B1/0472; machines or pumps with cam-actuated distribution members at the inner ends of the cylinders F04B1/0531; the piston-driving cams being provided with inlets and outlets F04B1/0535) · CPC title

• F04B53/1077

  Flow resistance valves, e.g. without moving parts · CPC title

• B60T8/4031 Primary

  Pump units characterised by their construction or mounting (pump units in combination with valve blocks B60T8/36) · CPC title

• F04B53/10

  Valves; Arrangement of valves · CPC title