|
| US3957248 | 16. Sept. 1974 | 18. Mai 1976 | Atlas Copco Aktiebolag | Air hoist with an overload protection device |
| US3998432 | 2. Jan. 1976 | 21. Dez. 1976 | Charles D. Uldricks | Air operated load balancing hoist |
| US4061311 | 28. Mai 1976 | 6. Dez. 1977 | Tsubakimoto Chain Company | Air hoist and its control device |
| US4458880 | 5. Febr. 1982 | 10. Juli 1984 | | Method and apparatus to measure tension in a pull line for cable |
| US4461459 | 5. Aug. 1982 | 24. Juli 1984 | | Method and apparatus to measure tension in a pull line for cable |
| US4462571 | 24. Febr. 1982 | 31. Juli 1984 | D. W. Zimmerman Mfg., Inc. | Fluid-operated, load-handling apparatus |
| US4478390 | 23. März 1983 | 23. Okt. 1984 | D. W. Zimmerman Mfg., Inc. | Fluid-operated apparatus for handling and lifting loads |
| US4500074 | 10. Nov. 1983 | 19. Febr. 1985 | D. W. Zimmerman Mfg., Inc. | Fluid-operated apparatus for handling and lifting loads |
| US5509638 | 7. Nov. 1994 | 23. Apr. 1996 | | Hoist with an elastic cable |
| US5522581 | 13. Jan. 1994 | 4. Juni 1996 | Zimmerman International Corp. | Balancing hoist and material handling system |
| US5848781 | 1. Mai 1997 | 15. Dez. 1998 | Ingersoll-Rand Company | Balancing hoist braking system |
| US5915673 | 17. Juni 1997 | 29. Juni 1999 | | Pneumatic human power amplifer module |
| US6155538 | 3. Aug. 1999 | 5. Dez. 2000 | Mannesmann AG | Winch |
| US6241462 | 20. Juli 1999 | 5. Juni 2001 | Collaborative Motion Control, Inc. | Method and apparatus for a high-performance hoist |
| US6299139 | 16. Nov. 1998 | 9. Okt. 2001 | | Human power amplifier for vertical maneuvers |
| US6386513 | 18. Nov. 1999 | 14. Mai 2002 | | Human power amplifier for lifting load including apparatus for preventing slack in lifting cable |
| US6554252 | 15. März 2002 | 29. Apr. 2003 | Homayoon Kazerooni | Device and method for wireless lifting assist devices |
| US6622990 | 8. Febr. 2002 | 23. Sept. 2003 | | Human power amplifier for lifting load with slack prevention apparatus |
| US6668668 | 8. Febr. 1999 | 30. Dez. 2003 | Stanley Assembly Technologies | Non-contacting sensors |
| US6886812 | 16. Apr. 2003 | 3. Mai 2005 | | Human power amplifier for lifting load with slack prevention apparatus |
| US7559533 | 16. Jan. 2007 | 14. Juli 2009 | Gorbel, Inc. | Lift actuator |
| USD543003 | 24. März 2006 | 15. Mai 2007 | Gorbel, Inc. | Actuator for a lifting device |
| USD543334 | 24. März 2006 | 22. Mai 2007 | Gorbel, Inc. | Handle for a lifting device |
