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US 11,891,282 B2Granted
Hoisting and lowering device
AssigneeGrid Manufacturing Corporation
InventorMark Groves
Life of this patent
Estimating the term…
Abstract
A device, system and method are used for hoisting and lowering a load. The device has a front plate that may be displaced to reveal a sheave. The device also has a friction accessory. The friction accessory is arranged to create friction between a rope and the device when a load is suspended from the device using the rope and where the device is secured to a support structure. The system may be prepared by an operator, having ascended to an elevated location, and further allows the operator to lower the load from the elevated location prior to descending.
Claims20
A device comprising:
- a main body having a rear wall, a cylindrical post extending forwardly from the rear wall, and a boss that also extends forward from the rear wall, the boss carrying a releasable clasp configured as a push button;
- a sheave supported on the cylindrical post for rotation relative to the main body, the sheave including a front face and a rear face, the rear face of the sheave being adjacent to the rear wall of the main body, the sheave also including an outer circumferential groove, the outer circumferential groove sized and configured to accommodate a portion of an outer surface of a cable;
- and
- a front plate rotatably coupled to the cylindrical post so as to overlay the front face of the sheave and selectively overlay at least a portion of a front surface of the boss of the main body, the front plate comprising an opening that is selectively engageable with the releasable clasp such that, when the releasable clasp is selectively engaged with the opening, the releasable clasp restrains the front plate against rotation relative to the main body,
- wherein a thickness of the main body is greater than a thickness of the front plate.
2 more elements
Dependencies are inferred from the claim text.