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Itzehoe, Germany

Sihi Gmbh & Co Kg

USPTO Granted Patents = 17

Forward Citations = 170

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21 inventors (with patents filed for the assignee):

Siegfried Auschrat (5 out of 5 patents)

Wilfried Lehmann (4 out of 5 patents)

Hermann Muller (4 out of 4 patents)

4. Udo Segebrecht (4 out of 4 patents)

5. Ralf Mann (3 out of 4 patents)

6. Klaus Domagalla (3 out of 3 patents)

7. Peter Fandrey (2 out of 3 patents)

8. Klaus-Viktor Peinemann (1 out of 14 patents)

9. Jan Wind (1 out of 10 patents)

10. Alfons Jünemann (1 out of 3 patents)

11. Klaus Ohlrogge (1 out of 7 patents)

12. Gerhard Hauk (1 out of 1 patent)

13. Erwin Zimmermann (1 out of 2 patents)

14. Dietmar Gosch (1 out of 1 patent)

15. Karl-Heinz Nikutta (1 out of 1 patent)

17 patents: Sort by Forward Citations

1. 5800146 - Liquid-ring gas pump with a silencing element in the discharge space (1998-09-01),

2. 5775816 - Bearing arrangement (1998-07-07),

3. 5767635 - Displacement machine with electronic motor synchronization (1998-06-16),

4. 5735674 - Liquid-ring gas pump (1998-04-07),

5. 5549450 - Centrifugal pump of the sectional-casing design (1996-08-27),

6. 5509789 - Liquid ring pump having a sheet metal working chamber casing (1996-04-23),

7. 5489195 - Liquid ring pump having a sheet metal valve plate (1996-02-06),

8. 5456827 - Compressor system having a device for continuous cleaning of the (1995-10-10),

9. 5194074 - Device for continuously purifying the waste gases from a vacuum unit (1993-03-16),

10. 4979875 - Centrifugal pump for the delivery of hot liquids (1990-12-25),

11. 4710105 - Liquid-ring compressor unit (1987-12-01),

12. 4685865 - Liquid ring compressor having openings in housing for emptying liquid (1987-08-11),

13. 4634348 - Liquid ring compressor having a passageway in discharge port for (1987-01-06),

14. 4632649 - Gas jet pump (1986-12-30),

15. 4390317 - Self-priming centrifugal pump, in particular for conveying liquids in (1983-06-28),

Sihi GmbH & Co. KG is a leading manufacturer of liquid ring vacuum pumps and compressors for industrial applications. With over 90 years of experience, Sihi has a strong reputation for high-quality products and excellent customer service. The company offers a wide range of vacuum solutions for various industries, including chemical, pharmaceutical, and food processing. Sihi is dedicated to innovation and sustainability, constantly striving to improve its products and processes to meet the evolving needs of its customers.

This text is generated by artificial intelligence and may not be accurate.

Company Badge

USPTO Data Jan 1 1976 - Dec 9 2025

17 Patents

#2 in Itzehoe

#2,499 in Germany

#34,819 in the World

Itzehoe, Germany

Sihi Gmbh & Co Kg

Forward Citations = 170

21 inventors:

Siegfried Auschrat (5 out of 5 patents)

Wilfried Lehmann (4 out of 5 patents)

Hermann Muller (4 out of 4 patents)

4. Udo Segebrecht (4 out of 4 patents)

5. Ralf Mann (3 out of 4 patents)

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