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| Number | Title | Issue Date |
| 7533871 | Rope control apparatus Embodiments of the invention provide a simple and convenient way to ascend and descend a rope without using a belayer. Embodiments of the invention can smoothly transition from a rope clamping position to a rope unclamping position, conveniently providing an effecti... | 05/19/2009 |
| 7419138 | Self-camming pulley A pulley is provided having a first plate and a second plate arranged adjacent to the first plate and connected to the first plate by an axle. An eccentrically mounted sheave is located between the first plate and the second plate and is adapted to freewheel in one ... | 09/02/2008 |
| 6601829 | Pulley system with gripping block and tackle for load handling An improved block and tackle system comprising a stationary-block housing (10) having attached pulleys (14 & 18) and cam cleat (22), and a moving-block housing (12) with attached pulley (16) and cam cleat (20) Said invention allows a load (8) to be raised... | 08/05/2003 |
| 4934660 | Device for raising and lowering loads A device for raising and lowering a load has a braking device, brake indicator, and a one-way pulley. The braking device uses a wedge-shaped braking element to stop the advancement of a cord. The brake indicator indicates when the braking device is enable... | 06/19/1990 |
| 4502668 | Removable double-action rope grip A rope grip which comprises a guide means and operator means defining a channel for receiving a rope. The guide means defining a first gripping surface and the operator means defines a second gripping surface. The two surfaces are in a facing spaced relat... | 03/05/1985 |
| 3944186 | Locking pulley assembly and method of making same A locking pulley assembly includes a pulley adapted to be affixed to a surface, a pull handle, a swivel hook, and a cord extending between the swivel hook and the handle around the pulley wheel. The pulley includes a unitary pulley wheel having locking gr... | 03/16/1976 |
