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| Application No. | Application Title | Issue Date |
| 20100108412 | STAIR CLIMBING DEVICE The present invention provides a device for safely and conveniently conveying an object on a slope. The safety feature includes a fail-safe one-way brake comprising a ratchet wheel, a pawl and a biasing means. In one embodiment, the device is foldable; in another embodi... | 05/06/2010 |
| 20070227835 | Roller disk brake for a winch A power device includes a motor, a drive shaft, and a roller brake system including a cam mechanism. The motor may put out a driving torque in a first and a second rotary direction. The cam mechanism includes first and second cam members. The first cam member may be in ... | 10/04/2007 |
