DEFINITIONS
The words “comprising,” “having,” and “including,” and other forms thereof, are intended to be equivalent in meaning and be open ended in that an item or items following any one of these words is not meant to be an exhaustive listing of such item or items, or meant to be limited to only the listed item or items.
Cable shall mean a length of flexible material made of a single strand or a plurality of strands.
BACKGROUND OF INVENTION
A cable puller may be used for hoisting, hauling, or both. Cable pullers typically comprise an unwinched hook, a winched hook, a ratchet device, and a cable having one end connected to the ratchet device and another end attached to the winched hook. A cable puller is used by attaching the unwinched hook to an anchor and the winched hook to a load. The ratchet device is then manually actuated so as to winch the cable by rotating an actuating lever of the cable puller. A user typically uses one hand to hold the actuating lever, placing his or her one hand at a distal end of a grip coupled to the actuating lever, or uses two hands, placing one hand over the other at the distal end of the grip.
SUMMARY OF INVENTION
This invention, with its several desirable features, is summarized in the CLAIMS that follow. After reading the following section entitled “DETAILED DESCRIPTION,” one will understand how the features of this invention provide its benefits. These benefits include, but are not limited to: providing a cable puller grip that facilitates using two hands placed side by side to rotate the actuating lever, thereby spreading the force over the length of the lever rather than at its distal end.
Some, but not all, of the features of this invention are:
One, the grip of this invention is adapted to be coupled to a manually actuated lever of a cable puller to assist a user to hold the lever with two hands positioned side by side. The grip may be coupled to the actuating lever by inserting a distal end of the actuating lever through an open proximal end into an interior of the grip's body. If desired, the grip may be removed and replaced. In one embodiment, the grip includes a unitary, elongated body having a hollow interior extending lengthwise. In another embodiment, the grip comprises a pair of hollow bodies mounted on the actuating lever of the cable puller side by side, either abutting each other or spaced apart. Typically, the grip has a length greater than about 12 inches and a cross-sectional area from about 1.5 to about 3 square inches. In the embodiment employing a pair of bodies, each body has a length from about 4 inches to about 8 inches.
Two, the grip may include a first longitudinal side and a second longitudinal side opposite the first longitudinal side. A palm section may extend lengthwise substantially along the entire length of the first longitudinal side, and a finger section may extend lengthwise substantially along the entire length of the second longitudinal side. The finger section may have a first arcuate segment bowing away from the palm section and a second arcuate segment bowing towards the palm section. Typically, the first arcuate segment has a length from about 4 inches to about 8 inches and the second arcuate segment has a length from about 4 inches to about 8 inches. The first arcuate segment may be inboard of the second arcuate segment. A raised, rounded intermediate segment may be between the first and second arcuate segments. Typically, the intermediate segment is not present in the embodiment where the grip comprises two separate bodies. In either embodiment, the arcuate segments are aligned along the length of the lever facing away from the user.
Three, the palm section may comprise an exterior, substantially planar surface. It may have a plurality of laterally orientated grooves positioned side by side, substantially parallel to each other, and its exterior has rounded lateral edges so that it is curved laterally generally to the shape of a partially closed palm of a human hand. The finger section comprises a plurality of indented contoured portions shaped to the outline of portions of individual fingers from human hands and positioned in a row side by side to orient the hands of a user in a side by side relationship when grasping the grip. In one embodiment, the finger section includes eight opposed pairs of contoured portions in two groups of four, one group of four on each arcuate segment.
Four, the body or bodies of the grip may be made of a molded polymeric material with a pair of lengthwise extending recesses therein on opposite sides of the body or bodies. One recess is configured to receive the palm section and the other recess is configured to receive the finger section. Typically, each section is made of a substantially non-slippery material such as a thermoplastic rubber applied to the recesses. These sections may be bonded to the body by an adhesive or by molding, for example by insert molding, or by stamping.
Five, the cross-sectional shape of the grip may vary. For example, it may be substantially quadrilateral, such as trapezoidal, circular, oval, or oblong. The trapezoidal shape includes opposed sides that may taper into the finger section. A trapezoidal shaped grip is ergonomically desirable because it is comfortable to hold when applying a pulling force to the actuating lever of the cable puller. In this embodiment, the body includes a pair of sidewalls connecting a top wall to a bottom wall. Longitudinal junctions may be formed along the edges where the walls meet the palm section and finger section. The palm and finger sections may each include overlapping segments covering adjacent portions of the sidewalls. The sidewalls may taper inward towards the finger section.
These features are not listed in any rank order nor is this list intended to be exhaustive.
This invention also includes a cable puller using the grip of this invention and a method of moving a load employing this cable puller. By grasping the grip with both hands in a side by side relationship, the user distributes the pulling force over the length of the actuating lever rather than just at its distal end. Also, the user has the ability to control more easily the orientation of the cable puller, enabling the user to twist the lever and cable puller to one side or the other as he or she is manipulating the lever.
DESCRIPTION OF DRAWING
The preferred embodiments of this invention, illustrating all its features, will now be discussed in detail. These embodiments depict the novel and non-obvious cable puller and method of this invention as shown in the accompanying drawing, which is for illustrative purposes only. This drawing includes the following figures (FIGS.), with like numerals indicating like parts:
FIG. 1 is a perspective view of a cable puller according to one embodiment of the invention.
FIG. 2 is a side view of a cable puller shown in FIG. 1 illustrating movement of the actuating lever and the cable puller.
FIG. 2A is cross-sectional view taken along line 2A—2A in FIG. 2.
FIG. 3 is a side view of the cable puller shown in FIG. 1 with the grip exploded from the actuating lever of the cable puller.
FIG. 4 is a perspective view of the cable puller grip shown in FIG. 1.
FIG. 5 is an exploded view of the grip shown in FIG. 4.
FIG. 6 is a cross-sectional view taken along line 6—6 of FIG. 4 with the actuating lever partially (or completely) inserted into the grip.
FIG. 7 is a top view of the grip taken along line 7—7 of FIG. 4.
FIG. 8 is a bottom view of the grip taken along line 8—8 of FIG. 4.
FIG. 9 is a side view of the grip shown in FIG. 4.
FIG. 10 is an end view of the grip taken along line 10—10 of FIG. 3.
FIG. 11 is an end view of the grip taken along line 11—11 of FIG. 3.
FIG. 12 is a perspective view of a cable puller grip having a circular cross-section.
FIG. 13 is a perspective view of a cable puller grip having two bodies.
FIG. 14 is a cross-sectional view of a cable puller grip having an oval configuration.
FIG. 15 is a cross-sectional view of a cable puller grip having an oblong configuration.
DETAILED DESCRIPTION OF SOME EMBODIMENTS OF THIS INVENTION
Referring to FIGS. 1 and 2, the cable puller 10 comprises a drum 14, a frame 16, a feed pawl 18, a retainer pawl 22, a cable 23, and an actuating lever 20 including a grip 12 mounted on the actuating lever 20. A novel feature of this invention is the grip 12, which has a length from about 12 inches to about 18 inches. The length of the grip 12 facilitates holding it with two hands 62a and 62b placed side by side in accordance with one feature of this invention. The grip 12 has a unique ergonomically friendly shape that directs the user to place his or her hands side by side on the grip to more evenly distribute the pulling forces over the length of the actuating lever 20, rather than applying the pulling force at the distal end 20a (FIG. 3) of the actuating lever 20 as heretofore. As shown in FIG. 2A, in one embodiment, the grip 12 has a substantially quadrilateral cross-sectional shape, for example, its cross-sectional shape is substantially trapezoidal. In other embodiments, the grip may have other cross-sectional shapes. For example, one embodiment, the grip 12a, has a substantially circular cross-sectional shape as shown in FIG. 12. Another embodiment, the grip 12b, has a substantially oval cross-sectional shape as shown in FIG. 14. Still another embodiment, the grip 12c, has a substantially oblong cross-sectional shape as shown in FIG. 15. Typically, the grip has a cross-sectional area from about 1.5 to about 3 square inches.
As best shown in FIGS. 4 through 11, the grip 12 comprises an elongated body 24 including a palm section 26 and a finger section 28 opposed to the palm section. This body 24 may be formed from a polymeric material such as, for example, polypropylene. The palm section 26 and the finger section 28 are typically made from a substantially non-slippery material. The substantially non-slippery material may comprise a moldable rubber material, such as thermoplastic rubber. The palm section 26 and the finger section 28 may be bonded to the exterior of the body 24 by molding, such as by forming the body 24 first by injection molding in a first mold, and then placing the body 24 into a second mold and injecting molten rubber material into the second mold to form on the body the palm section 26 and finger section 28. Alternatively, the finger section 26, or palm section 28,or both, may be molded first, and then one or both of these sections may then be placed into a second mold, and the body 24 material injected into the second mold. The palm section 26 and the finger section 28 may also be bonded to the body 24 by stamping or using an adhesive.
As best shown in FIGS. 5 and 6, the body 24 may have a hollow interior 42 with a closed end 42a (FIG. 10) and an open end 42b (FIG. 11). The closed end 42a is located on the distal end 24c of the body 24, and the open end 42b is located on the proximal end 24d of the body 24. The hollow interior 42 may extend along the length of the body 24. The grip 12 is mounted to the actuating lever 20 by inserting the distal end 20a of actuating lever 20 into the open end 42b of the body 24 and passing one or more bolts B through both the grip 12 and the actuating lever 20 and fastening in position with nuts or rivets N (FIG. 2A).
As the embodiment depicted in FIGS. 2A and 5 illustrates, the body 24 may comprise a top wall 24a, a bottom wall 24b, and a pair of opposed sidewalls 30 and 32. Each sidewall 30, 32 may have, respectively, a pair of individual steps 30a, 30b and 32a, 32b. The steps 30a, 32a each lie proximate to the top wall 24a and form therein an elongated recess R1 configured to receive the palm section 26. The steps 30b, 32b lie proximate to the bottom wall 24b and form therein an elongated recess R2 configured to receive the finger section 28. Upper rounded edges 30c and 32c, respectively of sidewalls 30, 32, are connected to, and integral with, the top wall 24a to form a pair of junctions 34 and 36. Lower edges 30d and 32d, respectively of sidewalls 30, 32 are connected to, and integral with, the bottom wall 24b to form a pair of junctions 38 and 40. The sidewalls 30, 32 taper inward towards the finger section 28.
In the embodiment shown in FIGS. 5 and 6, the palm section 26 extends lengthwise substantially along the entire length of top wall 24a of the body 24. It may have rounded lateral edges E1 and E2. As depicted in FIG. 2A, the palm section 26 fits into the recess R1 and has an underside 25 that overlaps the junctions 34 and 36, such that upper portions of the sidewalls 30, 32 are covered. The palm section 26 comprises a segment 26a, a segment 26b and a segment 26c. The segment 26a covers essentially the entire the top wall 24a of the body 24, the segment 26b covers an upper portion of the sidewall 30, and the segment 26c covers an upper portion of the sidewall 32. The segment 26a has an exterior, substantially planar top surface S1. This segment 26a may have a plurality of laterally orientated grooves 26d positioned side-by-side and substantially parallel to each other and at a right angle to the axis X of the body 24. The grooves 26d may extend from the segment 26b, through the segment 26a, and through the segment 26c.
As shown in FIGS. 2A and 5, the finger section 28 extends lengthwise substantially along the entire length of the bottom wall 24b and fits into the recess R2. It has an underside 27 that overlaps the junctions 38 and 40, such that lower portions of the sidewalls 30, 32 are covered. The finger section 28 comprises a segment 28a, a segment 28b, and a segment 28c. The segment 28a covers essentially the entire the bottom wall 24b, the segment 28b covers a lower portion of the sidewall 30, and the segment 28c covers a lower portion of the sidewall 32. The segment 28a has an exterior, undulating bottom surface S2 that is narrower than the top surface S1 of the segment 26a of the palm section 26. Consequently, as shown in FIG. 2A, the cross-sectional shape of the grip 12 of this one embodiment is substantially trapezoidal having a rounded bottom surface S2 that fits comfortably into the partially closed fingers of a user grasping the grip 12.
As best illustrated in FIGS. 7 through 9, and 11, the finger section 28 has an arcuate segment 44 bowing away from the palm section 26 and an arcuate segment 46 bowing towards the palm section 26. The arcuate segment 44 typically has a length from about 4 to about 8 inches and the arcuate segment 46 has a length from about 4 to about 8 inches. The arcuate segment 44 preferably is inboard of the arcuate segment 46 when the grip 12 is placed on the actuating lever 20. A raised, rounded intermediate segment 48 may lie between the arcuate segment 44 and arcuate segment 46. The grip 12 is mounted on the actuating lever 20 so the arcuate segment 44 and 46 face away from the user when he or she is manipulating the lever 20.
A plurality of contoured indented portions 29 serving as finger guides are disposed along the length of the finger section 28. They are shaped to the outline of central portions of individual fingers from a pair of human hands and assist in directing a user to employ both hands 62a, 62b as illustrated in FIG. 2. The contoured portions 29 are positioned in a row, side by side, such that when a user places his or her fingers onto the contoured portions 29, his or her hands 62a, 62b are oriented in a side-by-side relationship when grasping the grip 12. As shown best in FIG. 8, the indented portions 29 are grouped into eight opposing pairs F1 and F2. These eight opposing pairs F1 and F2 correspond to the number of fingers of both hands 62a, 62b of a user wrapped around the grip 12. The indented portions 29 identified as F1 are molded into the surface of the segment 28b of the finger section 28, and the indented portions 29 identified as F2 are molded into the surface of the segment 28c of the finger section. As shown in FIG. 2, a right-handed user would normally place his or her right hand RH on the arcuate segment 46 and his or her left hand LH on the arcuate segment 44. A left-handed user would normally place his or her right hand RH on the arcuate segment 44 and his or her left hand LH on the arcuate segment 46. Because the opposed pairs F1 and F2 of the contoured portions 29 are employed, the grip 12 readily accommodates both right-handed and left-handed users.
Referring to FIG. 13, in one embodiment, the grip 12A may comprise two bodies, a body 52 and a body 54. These bodies 52 and 54 are placed side-by-side along the actuating lever 20. Each body 52, 54 may have a finger section 52a, 54a and a palm section 52b, 54b. The two bodies 52, 54 may have their inner ends abut as shown in dotted lines, or their inner ends may be spaced apart as shown in solid lines. For example, their adjacent ends may be spaced apart from about 2 to about 4 inches. Each body 52, 54 may have a hollow interior 53, and 55, respectively, with the body 52 having a pair of opposed open ends 52d and 52e, and the body 54 having a closed distal end 54e and an open proximal end 54d. Each body 52, 54 may have a length from about 4 and to about 8 inches. The body 52 has a finger section 52a that has an arcuate segment 52c bowing away from the palm section 52b, and the body 54 has an arcuate segment 54c that bows toward the palm section 54b. The body 54 is placed outboard of the body 52 when each body 52, 54 is placed onto the actuating lever 20. A user uses the grip 12A by placing one hand on each of the bodies 52, 54.
As depicted in FIGS. 1 through 3, the cable puller 10 may include drum 14 that comprises a cylinder 14a and a pair of ratchets 14b fixedly attached to opposed sides of the cylinder 14a. The ratchets 14b each have a plurality of teeth 14c along their respective perimeters. The frame 16, which generally may be a multi-walled structure, supports the drum 14 for rotation in both clockwise and counterclockwise directions. The frame 16 may comprise a cover 16a that covers the bottom of the cable puller 10. An unwinched hook 16d may be coupled to the frame 16a at one wall W1, while at another wall W2 there may be coupled a guide yoke 16b. The yoke 16b guides the movement of the cable 23 when the cable 23 is passed through it.
The actuating lever 20 may comprise a pair of legs 20b and 20c coupled together to form a single unitary lever 20. The feed pawl 18 may be a U-shaped member that is mounted to the actuating lever 20 to rotate, and is adapted to engage the teeth 14c of the ratchets 14b. The feed pawl 18 may have a pair of legs that each engage one of the individual ratchets 14b so as to rotate the drum 14 when the actuating lever 20 is rotated in the clockwise direction as viewed in FIG. 2. The feed pawl 18 may have a lowered, engaged position where the feed pawl 18 engages the teeth 14c of the ratchets 14b, and a raised, disengaged position where the feed pawl 18 does not engage the teeth 14c of the ratchets.
The retainer pawl 22 may be a U-shaped member having a pair of legs, one engaging each of the ratchets 14b. The retainer pawl 22 engages the ratchets 14b to prevent rotation of the drum 14 in a counterclockwise direction as viewed in FIG. 2, but do not prevent rotation of the drum 14 in a clockwise direction as viewed in FIG. 2. The retainer pawl 22 may be mounted on the frame 16 to pivot when manually depressed to disengage from the teeth 14c of the ratchets 14b on the drum 14.
The cable 23 may be fixedly attached at its proximal end 23a to the drum 14 and at its distal end 23b to a winched hook 16c. The cable 23 may be wound and unwound from the drum 14 by rotating this drum using the actuating lever 20. When attached to a load, the winding up of the cable 23 on the drum 14 causes the cable 23 to become taut and usually moves the load if it is not excessively heavy. Excessively heavy loads may results in the cable 23 breaking. A user may attach the hook 16c at the distal end 23b of the cable 23 to a load, and attach the unwinched hook 16a to an anchor. The cable 23 may then be wound around the drum 14 to pull the load by rotating the drum 14 in a clockwise direction as viewed in FIG. 2 by manually pulling the actuating lever 20 inward towards the drum 14. The indented portions 29 assist the user in orienting his or her hands 62a, 62b in a side-by-side relationship when grasping the grip 12 as discussed previously. By grasping the lever 20 with both hands 62a, 62b in a side by side relationship on the grip 12 as illustrated in FIG. 2, the user not only distributes the pulling force over the length of the lever 20 rather than just at its distal end 20a, he or she has the ability to more easily control the orientation of the cable puller 10 and twist the lever to one side or the other as he or she is manipulating the lever. The user, because of the shape of the arcuate segments 44 and 46 of the finger section 28, has a firmer, more comfortable hold on the lever 20.
SCOPE OF THE INVENTION
The above presents a description of the best mode contemplated of carrying out the present invention, and of the manner and process of making and using it, in such full, clear, concise, and exact terms as to enable any person skilled in the art to which it pertains to make and use this invention. This invention is, however, susceptible to modifications and alternate constructions from that discussed above which are fully equivalent. Consequently, it is not the intention to limit this invention to the particular embodiments disclosed. On the contrary, the intention is to cover all modifications and alternate constructions coming within the spirit and scope of the invention as generally expressed by the following claims, which particularly point out and distinctly claim the subject matter of the invention:
Patent Grant
7070169
