Ratchet device
A ratcheting device according to the solution comprises a rotatable cogwheel comprising a plurality of teeth, a spring-loaded primary pawl, a spring-loaded handle pawl, a handle comprising a handle pawl disengagement lever, a handle pawl disengagement plate and a primary pawl disengagement plate. The primary pawl disengagement plate is mechanically coupled to the handle such that the handle may be rotated around the cogwheel to a point that the primary pawl disengagement plate contacts the spring-loaded primary pawl and causes it to disengage from the cogwheel. At the same time that the primary pawl is disengaged from the cogwheel teeth by the primary pawl disengagement plate, the handle pawl is similarly disengaged from the cogwheel teeth via contact with a handle pawl disengagement plate. Advantageously, the ratcheting device may be transitioned between a ratcheting state and a free-to-rotate state with only a single hand of the user and without requiring the handle to travel beyond a 180-degree arc of motion.
1. A ratcheting device, the device comprising:
a rotatable cogwheel comprising a plurality of teeth;
a spring-loaded primary pawl positioned to engage any one of the plurality of teeth of the rotatable cogwheel, wherein when the spring-loaded primary pawl is engaged with the plurality of teeth of the rotatable cogwheel the ratcheting device is in a ratcheting state and when the spring-loaded primary pawl is disengaged from the plurality of teeth of the rotatable cogwheel the ratcheting device is in a free-to-rotate state;
a spring-loaded handle pawl positioned to engage the plurality of teeth of the rotatable cogwheel;
a handle comprising a handle pawl disengagement lever, wherein actuation of the handle pawl disengagement lever causes the spring-loaded handle pawl to disengage from the plurality of teeth of the rotatable cogwheel;
a primary pawl disengagement plate comprising a primary pawl disengagement feature, wherein the primary pawl disengagement plate is mechanically coupled to the handle; and
a handle pawl disengagement plate comprising a handle pawl disengagement feature;
wherein the handle may be rotated around the cogwheel such that:
the primary pawl disengagement feature of the primary pawl disengagement plate contacts the spring-loaded primary pawl and causes it to disengage from the plurality of teeth of the rotatable cogwheel; and
the handle pawl disengagement feature of the handle pawl disengagement plate contacts the spring-loaded handle pawl and causes it to disengage from the plurality of teeth of the rotatable cogwheel.
2. The ratcheting device of claim 1 , further comprising a back plate configured for mounting the ratcheting device to a structure.
3. The ratcheting device of claim 1 , wherein a spring operable to cause the spring-loaded handle pawl to engage the plurality of teeth of the rotatable cogwheel is configured to reside substantially within the handle.
4. The ratcheting device of claim 1 , wherein transition of the ratcheting device from the ratcheting state to the free-to-rotate state may be accomplished without rotating the handle beyond a 180-degree arc.
5. The ratcheting device of claim 1 , further comprising a rotatable shaft mechanically engaged to the cogwheel such that a longitudinal axis of the rotatable shaft is substantially perpendicular to a plane defined by the cogwheel.