Compressed-air-operated vacuum generator or vacuum gripper

• US 9,062,689 B2
• Filed: 11/18/2010
• Issued: 06/23/2015
• Est. Priority Date: 11/24/2009
• Status: Active Grant

• Current Assignee: J. Schmalz GmbH
• Original Assignee: J. Schmalz GmbH
• Inventors: Schaaf, Walter
• Primary Examiner(s): Wilson, Lee D
• Assistant Examiner(s): GRANT, ALVIN J
• Application Number:
  US13/511,585
• Publication Number:
  US 20130032981A1
• Time in Patent Office: 1,678 Days
• Field of Search: 269/21, 602/04, 607/38, 417/171, 417/157, 417/197, 417/54
• US Class Current: 1/1
• CPC Class Codes: B65G 47/91 incorporating pneumatic, e.g. suction, grippers
• CPC Class Codes: F04F 5/16 displacing elastic fluids
• CPC Class Codes: F04F 5/22 of multi-stage type
• CPC Class Codes: F04F 5/54 Installations characterised by use of jet pumps, e.g. combinations of two or more jet pumps of different type

Abstract

The invention relates to a compressed-air-operated vacuum generator or vacuum gripper having at least two vacuum units, wherein each vacuum unit has a suction chamber, an intake opening which opens into the suction chamber, an outflow opening which opens out of the suction chamber, and at least one drive air opening which opens into the outflow opening between the intake opening and the outflow opening, and wherein the vacuum units operate on the basis of at least two different principles (Venturi, Bernoulli, Coanda, vortex, etc.) for generating a negative pressure.

Claims

1. A compressed-air-operated vacuum generator or vacuum gripper with at least two vacuum units, each vacuum unit comprising:

a suction chamber,

an intake opening which opens into the suction chamber,

an outlet opening which exits from the suction chamber, and

at least one drive air opening which opens into the outlet opening, wherein the outlet opening of one of the at least two vacuum units opens into the at least one drive air opening of another of the at least two vacuum units, wherein the at least two vacuum units operate according to at least two different principles for compressed-air-driven generation of a negative pressure.

2. The vacuum generator or vacuum gripper of claim 1, wherein the at least two vacuum units comprise at least one unit selected from a vacuum nozzle, an ejector and a vacuum-generating stage.

3. The vacuum generator or vacuum gripper of claim 1, wherein the at least two vacuum units are connected in series.

4. The vacuum generator or vacuum gripper of claim 1, wherein the at least two vacuum units are arranged in a common housing.

5. The vacuum generator or vacuum gripper of claim 1, wherein the suction chambers of the at least two different vacuum units are separated from each other.

6. The vacuum generator or vacuum gripper of claim 1, wherein the suction chambers of the at least two different vacuum units are connected to one another by at least one movable flap.

7. The vacuum generator or vacuum gripper of claim 6, wherein the at least one movable flap is controllably closed or opened depending on vacuum pressure or volume flow rate, or both.

8. The vacuum generator or vacuum gripper of claim 1, wherein the at least two different principles are selected from the group consisting of Venturi principle, Bernoulli principle, Coanda principle and vortex principle.

9. The vacuum generator or vacuum gripper of claim 1, further comprising a blower system.

10. The vacuum generator or vacuum gripper of claim 1, further comprising a sensor detecting at least one of flow conditions and pressure conditions.

11. The vacuum generator or vacuum gripper of claim 10, wherein the sensor is constructed to detect the at least one of flow conditions and pressure conditions in the suction chamber.

12. The vacuum generator or vacuum gripper of claim 1, wherein the at least two vacuum units vacuum units operate simultaneously.

13. The vacuum generator or vacuum gripper of claim 1, wherein the at least two vacuum units vacuum units operate sequentially.