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For the Inventor, By the Inventor

Marktheidenfeld, Germany

Hydraulik-ring Gmbh


USPTO Granted Patents = 90


Trademarks = 2

Forward Citations = 632

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81 inventors (with patents filed for the assignee):

goldMedal Alfred Trzmiel (23 out of 37 patents)

silverMedal Andreas Knecht (17 out of 38 patents)

bronzeMedal Roland Meyer (12 out of 20 patents)

4.  Edwin Palesch (11 out of 17 patents)

5.  Dieter Maisch (9 out of 13 patents)

6.  Friedrich Johann Zapf (9 out of 20 patents)

7.  Bernd Niethammer (9 out of 26 patents)

8.  Gerold Sluka (8 out of 14 patents)

9.  Andreas Wild (7 out of 9 patents)

10.  Rolf Neuhaus (7 out of 8 patents)

11.  Dieter Tischer (7 out of 18 patents)

12.  Marius Cornea (6 out of 8 patents)

13.  Gordon Neudoerfer (5 out of 6 patents)

14.  Martin Lenk (5 out of 8 patents)

15.  Steffen Martin (5 out of 5 patents)


Core Competencies:
Camshaft Adjuster
Hydraulic Circuit
Variable Valve Lift
Metering Valve
Pressure Control Valve
Solenoid Valve
Throttle Valve
Check Valve
Oscillating Motor
Exhaust Gas Treatment
Actuating Device
Filter Cartridge

90 patents:

1. 8230832 - Vane-type camshaft adjuster (2012-07-31),
2. 8074673 - Freeze-resistant metering valve (2011-12-13),
3. 7946266 - Hydraulic circuit, particularly for camshaft adjusters, and corresponding control element (2011-05-24),
4. 7895981 - Variable valve lift device for the lift adjustment of gas-exchange valves of an internal combustion engine (2011-03-01),
5. 7836857 - Hydraulic circuit, particularly for camshaft adjusters, and corresponding control element (2010-11-23),
6. 7640902 - Rotor for vane-type motor with reduced leakage (2010-01-05),
7. 7624711 - Variable mechanical valve control for an internal combustion engine (2009-12-01),
8. 7603973 - Variable mechanical valve control for an internal combustion engine (2009-10-20),
9. 7600531 - Valve with check valve (2009-10-13),
10. 7594516 - Freeze-resistant metering valve (2009-09-29),
11. 7513230 - Camshaft adjusting device (2009-04-07),
12. 7497232 - Pressure control valve (2009-03-03),
13. 7497193 - Rotor of a camshaft adjuster (2009-03-03),
14. 7418935 - Stroke adjusting device for valves of a combustion engine (2008-09-02),
15. 7331318 - Camshaft adjuster with play-free locking (2008-02-19),
Hydraulik-Ring GmbH is a leading company in the hydraulic industry. With over 50 years of experience, we specialize in the design, manufacturing, and distribution of high-quality hydraulic components and systems. Our extensive product range includes hydraulic cylinders, pumps, valves, hoses, and fittings. We are committed to delivering reliable solutions that meet our customers' specific hydraulic needs. Visit our website for more information about our products and services.
This text is generated by artificial intelligence and may not be accurate.

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USPTO Data Jan 1 1976 - Dec 30 2025

90 Patents

#1 in Marktheidenfeld

#677 in Germany

#8,258 in the World

...
Marktheidenfeld, Germany

Hydraulik-ring Gmbh

Forward Citations = 632

81 inventors:

goldMedal Alfred Trzmiel (23 out of 37 patents)

silverMedal Andreas Knecht (17 out of 38 patents)

bronzeMedal Roland Meyer (12 out of 20 patents)

4.  Edwin Palesch (11 out of 17 patents)

5.  Dieter Maisch (9 out of 13 patents)

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