Hand-driven ratchet strap assist device
Apparatus and associated methods relate to a ratchet strap system configured with a ball-shaped handgrip adapted to manipulate a ratchet strap drive shaft. In an illustrative example, the handgrip may include a substantially spherical distal portion coupled to the drive shaft via a substantially cylindrical neck member. The handgrip may, for example, be configured for after-market installation by receiving a shaft extension member of the drive shaft. Some handgrips may include opposing radial apertures for a retention pin to longitudinally fix the handgrip to the shaft extension member. A pliable resilient member disposed at the distal end may prevent decoupling prior to tensioning the strap. In various embodiments, the deployment time of a ratchet strap system may, for example, be reduced by using the handgrip to facilitate initial winding of a load securing strap, and to wind excess strap length for storage in conjunction with an elastic retaining loop.
1. A ratcheted strap control system comprising:
a length of webbing having a free proximal end and a hook coupled to a distal end;
a ratchet module configured to spool the length of a webbing with a ratcheting action, the ratchet module comprising:
a first base structure having a first annular ring portion about a hinge axis and with a first radius over a first predetermined range of angles, and a step portion having a second radius greater than the first radius, and a notch at an end of travel angular position and defining a third radius between the first radius and the second radius;
a second base structure having a second annular ring portion about the hinge axis and with a cam portion;
an axle extending along and configured to rotate about the hinge axis and to couple the first base structure to the second base structure in a hinged relationship between a closed position and an open position, wherein the axle defines an aperture configured to receive and retain the free end of the webbing in a spooling relationship, and wherein the axle is configured to spool in the webbing in response to the axle rotating in an opening direction;
a ratchet wheel coupled in a fixed rotating relationship with the axle about the hinge axis, the ratchet wheel providing a plurality of ratchet teeth radially extending from a perimeter of the ratchet wheel;
a ratchet pawl slidably carried in a slot formed in the first base structure, the pawl configured in a releasable blocking relationship with the plurality of ratchet teeth against rotation in a closing direction;
a ratchet bar slidably carried in a slot formed in the second base structure, the ratchet bar configured in a biased relationship to dynamically engage any one of the plurality of ratchet teeth; and,
an axially symmetric handgrip configured to couple in a fixed rotational relationship to the axle, wherein:
(1) in a first mode of operation that occurs over the first predetermined range of angles between the first base structure and the second base structure, the pawl engages the ratchet wheel to block rotation of the ratchet wheel in the closing direction, and the ratchet bar is configured to impart rotation to the axle as the ratchet bar rotates in the opening direction;
(2) in a second mode of operation, the ratchet bar disengages from the ratchet wheel in response to engagement with the step portion such that the handgrip is operable to impart rotation to the axle in the opening direction in response to operator input while the ratchet pawl blocks rotation of the axle in the closing direction; and,
(3) in a third mode of operation, the pawl disengages from the ratchet wheel in response to being displaced by the cam portion when the ratchet bar is positioned in the notch, such that the handgrip is operable to impart rotation to the axle in the opening direction and the closing direction in response to operator input; wherein the handgrip further comprises a neck portion and a substantially spherical bulbous portion; wherein the handgrip further comprises a pair of apertures on opposing sides of the neck portion and configured to releasably couple to the axle; wherein the axle comprises corresponding apertures that, when aligned with the pair of apertures in the handgrip, are adapted to receive a coupling member that couples the handgrip in the fixed rotational relationship with the axle.
2. The ratcheted strap control system of claim 1 , wherein the handgrip is adapted to releasably couple to the axle.
3. The ratcheted strap control system of claim 1 , wherein the handgrip further defines an axially symmetric profile sized for a secure grip by a hand of an adult operator.
4. The ratcheted strap control system of claim 1 , wherein the handgrip further comprises axially extending scalloped contours arranged symmetrically to form a grip surface.
5. The ratcheted strap control system of claim 1 , further comprising a retainer comprising an elastic loop portion and a proximal attachment strap coupled to the first base structure, the elastic loop sized to a diameter that, when in a neutral state, encompasses an area less than a cross-sectional area of the handgrip when wrapped by a predetermined length of the webbing.
6. The ratcheted strap control system of claim 5 , wherein the elastic loop portion is sized to a diameter that, when in a stretched state, is adapted to securely retain the predetermined length of the webbing when wrapped around the first and second base structures in the closed position, and wherein the attachment strap is securely attached to one of the first and second base structures.
7. The ratcheted strap control system of claim 1 , further comprising a compliant, deformable, shape resilient member coupled to a distal end of the webbing and adapted to cooperate with the hook to maintain the hook in engagement with an attachment structure while the operator is remote from the hook and while the webbing is slack.
8. An apparatus comprising:
a ratchet module configured to spool a length of a webbing with a ratcheting action, the ratchet module comprising:
a first base structure having a first annular ring portion about a hinge axis and with a first radius over a first predetermined range of angles, and a step portion having a second radius greater than the first radius, and a notch at an end of travel angular position and defining a third radius between the first radius and the second radius;
a second base structure having a second annular ring portion about the hinge axis and with a cam portion;
an axle extending along and configured to rotate about the hinge axis and to couple the first base structure to the second base structure in a hinged relationship between a closed position and an open position, wherein the axle defines an aperture configured to receive and retain a free end of a strap in a spooling relationship, and wherein the axle is configured to spool in the strap in response to the axle rotating in an opening direction;
a ratchet wheel coupled in a fixed rotating relationship with the axle about the hinge axis, the ratchet wheel providing a plurality of ratchet teeth radially extending from a perimeter of the ratchet wheel;
a ratchet pawl slidably carried in a slot formed in the first base structure, the pawl configured in a releasable blocking relationship with the plurality of ratchet teeth against rotation in a closing direction;
a ratchet bar slidably carried in a slot formed in the second base structure, the ratchet bar configured in a biased relationship to dynamically engage any one of the plurality of ratchet teeth; and,
an axially symmetric handgrip configured to couple in a fixed rotational relationship to the axle, wherein:
(1) in a first mode of operation that occurs over the first predetermined range of angles between the first base structure and the second base structure, the pawl engages the ratchet wheel to block rotation of the ratchet wheel in the closing direction, and the ratchet bar is configured to impart rotation to the axle as the ratchet bar rotates in the opening direction;
(2) in a second mode of operation, the ratchet bar disengages from the ratchet wheel in response to engagement with the step portion such that the handgrip is operable to impart rotation to the axle in the opening direction in response to operator input while the ratchet pawl blocks rotation of the axle in the closing direction; and,
(3) in a third mode of operation, the pawl disengages from the ratchet wheel in response to being displaced by the cam portion when the ratchet bar is positioned in the notch, such that the handgrip is operable to impart rotation to the axle in the opening direction and the closing direction in response to operator input; wherein the handgrip further comprises a neck portion and a substantially spherical bulbous portion, and the handgrip further comprises a pair of apertures on opposing sides of the neck portion and configured to releasably couple to the axle, wherein the axle comprises corresponding apertures that, when aligned with the pair of apertures in the handgrip, are adapted to receive a coupling member that couples the handgrip in the fixed rotational relationship with the axle.
9. The apparatus of claim 8 , wherein the handgrip is adapted to releasably couple to the axle.
10. The apparatus of claim 8 , wherein the handgrip further defines an axially symmetric profile sized for a secure grip by a hand of an adult operator, the handgrip further comprising axially extending scalloped contours arranged symmetrically to form a grip surface.
11. The apparatus of claim 8 , further comprising a retainer comprising an elastic loop portion and a proximal attachment strap coupled to the first base structure, the elastic loop sized to a diameter that, when in a neutral state, encompasses an area less than a cross-sectional area of the handgrip when wrapped by a predetermined length of the strap.
12. The apparatus of claim 11 , wherein the elastic loop portion is sized to a diameter that, when in a stretched state, is adapted to securely retain the predetermined length of the strap when wrapped around the first and second base structures in the closed position.
13. The apparatus of claim 11 , wherein the attachment strap is securely attached to one of the first and second base structures.