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 cogwheel comprising a plurality of teeth;
a primary pawl positioned to engage the cogwheel, wherein when the primary pawl is engaged with the cogwheel the ratcheting device is in a ratcheting state and when the primary pawl is disengaged from the cogwheel the ratcheting device is in a free-to-rotate state;
a handle pawl positioned to engage the cogwheel;
a handle comprising a handle pawl disengagement actuator, wherein actuation of the handle pawl disengagement actuator causes the handle pawl to disengage from the cogwheel;
a primary pawl disengagement mechanism comprising a primary pawl disengagement feature, wherein the primary pawl disengagement mechanism is associated with the handle; and
a handle pawl disengagement mechanism;
wherein the handle may be rotated around the cogwheel such that:
the primary pawl disengagement mechanism contacts the primary pawl and causes it to disengage from the cogwheel; and
the handle pawl disengagement mechanism contacts the handle pawl and causes it to disengage from the 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 , further comprising a spring residing substantially within the handle and operable to cause the handle pawl to engage the cogwheel.
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.
6. The ratcheting device of claim 5 , further comprising a strap in mechanical communication with the rotatable shaft.
7. The ratcheting device of claim 1 , wherein at least one of the primary pawl and the handle pawl is spring-loaded.