Issued Patents All Time
Showing 26–39 of 39 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6244449 | Free fall disconnect | — | 2001-06-12 |
| 6131751 | Counter weight handling system and boom parking device | Alan E. Pleuss, Kenneth J. Porubcansky | 2000-10-17 |
| 6062405 | Hydraulic boom hoist cylinder crane | Charles R. Wernecke | 2000-05-16 |
| 6010018 | Swing lock mechanism | — | 2000-01-04 |
| 5615784 | Crane counterweight installation and removal apparatus | Larry Schweigl | 1997-04-01 |
| 5579931 | Liftcrane with synchronous rope operation | Arthur G. Zuehlke | 1996-12-03 |
| 5522515 | Ring segment connection | Wayne W. Beebe, Terry W. Kleppe | 1996-06-04 |
| 5487479 | Method for nesting longitudinally divisible crane boom segments | Robert J. Walker, Michael J. Wanek | 1996-01-30 |
| 5406767 | Longitudinally divisible crane boom segment | Robert J. Walker, Michael J. Wanek | 1995-04-18 |
| 5353940 | Alignment system for crane works and method of alignment | Jeff J. Jeske | 1994-10-11 |
| 5199586 | Quick-connect sectional boom members for cranes and the like | Wayne W. Beebe, Terry S. Casavant, John M. Lanning, Paul M. Pukita, Michael J. Wanek | 1993-04-06 |
| 5189605 | Control and hydraulic system for a liftcrane | Arthur G. Zuehlke | 1993-02-23 |
| 5176267 | Quick disconnect system for construction equipment with rotatable upper works | — | 1993-01-05 |
| 4729486 | Lift enhancing beam attachment with movable counterweights | Terry L. Petzold | 1988-03-08 |