In general the present invention relates to gripping devices and, in particular, to a device for releasably gripping a cable.
Industrial, commercial and residential construction sites typically require the suspension of equipment (such as HVAC units and ducts, lighting structures, various construction equipment and tools, and roofing materials) from structural members (such as overhead beams, ceilings, roofs, cranes, and girders). A suspension cable such as a metallic or rubber rope or wire is used to aid in this suspension. It is typically attached on one end to the structural member, inserted through a wedge device, looped around the equipment, and finally the cable is inserted through the wedge device a second time to retain the cable in place and suspend the equipment that is supported by the cable. Prior wedge devices have inner jaws or retention members that can twist within the housing and thereby weaken their grip on the cable. High stress is also created on the housing because the jaws do not move parallel to the cable within the housing. An angled piece of metal is used to pinch the cable, which creates less than desirable cable gripping and may sever the cable in half. Such prior wedge devices are not hermaphroditic and are difficult to manufacture and assemble. They also consist of many parts and are costly to manufacture.
The present invention eliminates the above difficulties and disadvantages by providing an improved device for gripping a cable having a free end. The device comprises a first entrance port for receiving the free end of the cable and a first exit port that is in communication with the first entrance port from where the free end of the cable exits the device. A second entrance port is provided for receiving the free end of the cable after it leaves the exit port and is bundled through an eyelet, for example, that is attached to equipment or bundled around a group of generally linear items for shipping such as logs or electrical distribution poles. A second exit port is in communication with the second entrance port where the free end of the cable exits the device a second time. A first cable guide forms an arcuate pathway between the first entrance port and the first exit port. The first cable guide also includes a first guide rail secured therein. A first retention member is slidably disposed within the first cable guide such that the first retention member slides axially within the device only upon entrance of the cable within the first cable guide or when the cable is pulled toward the first entrance port.
The first retention member further includes an arcuate grip member integrally formed therewith and a retention channel integrally formed therewith that is complementary in shape to the first guide rail and slidably mounted thereon such that only axial movement of the first retention member is permitted within the first cable guide. The first retention member includes a rounded surface and a grip surface that is in communication with the rounded surface. The cable abuts the rounded surface upon entrance into the first entrance port and simultaneously the cable is deflected and the retention member is biased axially. The grip surface contacts the cable when the cable is pulled toward the first entrance port. A second cable guide forms an arcuate pathway between the second entrance port and the second exit port. The second cable guide also includes a second guide rail secured therein. A second retention member is slidably disposed within the second cable guide such that the second retention member slides axially within the device only upon entrance of the cable within the second cable guide or when the cable is pulled toward the second entrance port. The second retention member includes an arcuate grip member integrally formed therewith and a retention channel integrally formed therewith that is complementary in shape to the second guide rail and slidably mounted thereon such that only axial movement of the second retention member is permitted within the second cable guide. The second retention member includes a rounded surface and a grip surface that is in communication with the rounded surface. The cable abuts the rounded surface upon entrance into the second entrance port and simultaneously the cable is deflected away from the second retention member and the second retention member is biased axially. The grip surface contacts the cable when the cable is pulled toward the second entrance port.
Moreover, the first cable guide has a convex portion and a concave portion. The grip member of the first retention member is slidably positioned adjacent the concave portion of the first cable guide when the cable is inserted into the first cable guide and slidably positioned adjacent the convex portion of the first cable guide when the cable is pulled toward the first entrance port such that the cable is wedged between the grip member and the convex portion of the first cable guide. The second cable guide also has a convex portion and a concave portion. The grip member of the second retention member is slidably positioned adjacent the concave portion of the second cable guide when the cable is inserted into the second cable guide and slidably positioned adjacent the convex portion of the second cable guide when the cable is pulled toward the second entrance port such that the cable is wedged between the grip member and the convex portion of the second cable guide.
The first cable guide includes a first guide rail secured therein and the first retention member includes a retention channel integrally formed therewith that is complementary in shape to the first guide rail and slidably mounted thereon such that only axial movement of the first retention member is permitted within the first cable guide upon entrance of the cable within the first cable guide or when the cable is pulled toward the first entrance port. The second cable guide includes a second guide rail secured therein and the second retention member includes a retention channel integrally formed therewith that is complementary in shape to the second guide rail and slidably mounted thereon such that only axial movement of the second retention member is permitted within the second cable guide upon entrance of the cable within the second cable guide or when the cable is pulled toward the second entrance port. A release means is provided that comprises two apertures into which an actuation member is inserted for moving the retention member and disengaging the first retention member and the second retention member from the cable.
An alternate device comprises a first entrance port for receiving the free end of the cable and a first exit port that is in communication with the first entrance port from where the free end of the cable exits the device. A second entrance port is provided for receiving the free end of the cable after it leaves the exit port and is bundled through an eyelet, for example, that is attached to equipment or bundled around a group of generally linear items for shipping such as logs or electrical distribution poles. A second exit port is in communication with the second entrance port where the free end of the cable exits the device a second time. A first cable guide forms a pathway between the first entrance port and the first exit port that is preferably angled but could be straight. While a second cable guide forms a pathway between the second entrance port and the second exit port. A dividing wall is located between the first cable guide and the second guide, the dividing wall forming part of the first cable guide and the second guide. A first retention member is slidably disposed within the first cable guide and includes a grip member integrally formed therewith and having a grip surface angled in parallel relationship to the dividing wall such that the grip surface contacts the cable and wedges it against the dividing wall when the cable is pulled toward the first entrance port. Further, a second retention member is slidably disposed within the second cable guide and including a grip member integrally formed therewith. The grip member has a grip surface angled in parallel relationship to the dividing wall such that the grip surface contacts the cable and wedges it against the dividing wall when the cable is pulled toward the second entrance port. The grip surface of the first retention member and the second retention member are complimentary in shape to the cable.
The first cable guide includes a first shaft adjacent thereto and the first retention member includes a guide member integrally formed therewith that is complementary in shape to the first shaft and slidably mounted thereon such that only axial movement of the first retention member is permitted within the first cable guide upon entrance of the cable within the first entrance port or when the cable is pulled toward the first entrance port.
The second cable guide includes a second shaft adjacent thereto and the second retention member includes a guide member integrally formed therewith that is complementary in shape to the second shaft and slidably mounted thereon such that only axial movement of the second retention member is permitted within the second cable guide upon entrance of the cable within the second entrance port or when the cable is pulled toward the second entrance port.
A release means is provided that comprises two apertures into which an actuation member is inserted for moving the retention member and disengaging the first retention member and the second retention member from the cable.
The above and other features, aspects, and advantages of the present invention will now be discussed in the following detailed description and appended claims, which are to be considered in conjunction with the accompanying drawings in which identical reference numbers designate like elements throughout the views. Shown in
Turning now to the device 30 and that shown in
The device 30 includes a first entrance port 42 for receiving the free end 12 of the cable 10. The first entrance port 42 is angled or beveled to aid in entrance of the free end 12 of cable 10. As shown in
A first cable guide 80 is formed within device 30 and includes a first guide rail 84 secured therein. First guide rail 84 has an I-shaped cross section. A first retention member 58 is slidably disposed within the first cable guide 80 on the first guide rail 84 such that it can only move axially. No internal pressure is applied to the first cable guide 80 such as a spring, but rather it frictionally glides along the first guide rail 84 when pressure from cable 10 is applied against the first guide rail 84 during installation, which will be discussed in further detail below. The first retention member 58 further includes retention channels 62 integrally formed therewith that are complementary in shape to at least part of the first guide rail 84 in both the first shell 32 and the second shell 34, and slidably mounted thereon such that only axial movement of the first retention member 58 is permitted within the first cable guide 80 upon entrance of the cable 10 within the first entrance port 42 or when cable 10 is pulled toward the first entrance port 42. The retention channels 62 are generally U-shaped and formed between an arcuate grip member 66 that is integrally formed on the first retention member 58 and guide member 64 as shown in
Moreover, the first cable guide 80 forms an arcuate pathway between the first entrance port 42 and the first exit port 44 and has a convex portion 56 and a concave portion 54. The grip member 66 of the first retention member 58 is slidably positioned adjacent at least part of the concave portion 54 of the first cable guide 80 when the cable 10 is inserted into the first entrance port 42 and is slidably positioned adjacent the convex portion 56 of the first cable guide 80 when the cable 10 is pulled toward the first entrance port 42 such that the cable 10 is wedged between the grip member 66 and the convex portion 56 of the first cable guide 80. Also in this state grip surface 68 contacts cable 10 to further prevent slippage of the cable 10 within device 30 along the longitudinal area of the grip surface 68.
The device 30 further includes a second entrance port 46 for receiving the free end 12 of the cable 10. The second entrance port 46 is angled or beveled to aid in entrance of the free end 12 of cable 10. As shown in
As shown in
A second cable guide 82 is formed within device 30 and includes a second guide rail 86 secured therein. Second guide rail 86 has an I-shaped cross section. A second retention member 60 is slidably disposed within the second cable guide 82 on the second guide rail 84. No internal pressure is applied to the second cable guide 82 such as a spring, but rather it frictionally glides along the second guide rail 86 when pressure from cable 10 is applied against the second guide rail 86 during installation of cable 10. The second retention member 60 further includes retention channels 62 integrally formed therewith that are complementary in shape to at least part of the second guide rail 86 in both the second shell 32 and the second shell 34, and slidably mounted thereon such that only axial movement of the second retention member 60 is permitted within the second cable guide 82 upon entrance of the cable 10 within the second entrance port 46 or when cable 10 is pulled toward the second entrance port 46. The retention channels 62 are generally U-shaped and formed between an arcuate grip member 66 that is integrally formed on the second retention member 60 and guide member 64 as shown in
Moreover, the second cable guide 82 forms an arcuate pathway between the second entrance port 46 and the second exit port 48 and has a convex portion 56 and a concave portion 54. The grip member 66 of the second retention member 60 is slidably positioned adjacent at least part of the concave portion 54 of the second cable guide 82 when the cable 10 is inserted into the second entrance port 46 and is slidably positioned adjacent the convex portion 56 of the second cable guide 82 when the cable 10 is pulled toward the second entrance port 46 such that the cable 10 is wedged between the grip member 66 and the convex portion 56 of the second cable guide 82. Also in this state grip surface 68 contacts cable 10 to further prevent slippage of the cable 10 within device 30 along the longitudinal area of grip surface 68.
An alternate device 30 is shown in
The device 30 includes a first entrance port 42 for receiving the free end 12 of the cable 10. The first entrance port 42 is angled to aid in entrance of the free end 12 of cable 10. As shown in
A first cable guide 80 forms a pathway between the first entrance port 42 and the first exit port 44 that widens toward the first exit port 44. A second cable guide 82 forms a pathway between the second entrance port 46 and widens toward the second exit port 48. A dividing wall 52 is preferable constructed of the same material as first shell 32 and second shell 34 and located between the first cable guide 80 and the second cable guide 82. The dividing wall 52 is preferably angled at 45 degrees but could be straight or angled at a greater or lesser degree. The dividing wall 52 forms part of the first cable guide 80 and the second cable guide 82. As shown in
The first retention member 58 includes a grip member 66 integrally formed therewith. Grip member 66 has a grip surface 68 angled in parallel relationship to the dividing wall 52 such that the grip surface 68 contacts the cable 10 and wedges it against the dividing wall 52 when the cable 10 is pulled toward the first entrance port 42. Preferably grip surface 68 is concave in shape and has a plurality of abutting pyramid shapes formed thereon for conforming to the annular shape of cable 10 and gripping its surface along a longitudinal section.
In operation, upon entrance of the cable 10 within the first entrance port 42, cable 10 will abut angled surface 28 as shown in
Further, as shown in
The second retention member 60 includes a grip member 66 integrally formed therewith. Grip member 66 has a grip surface 68 angled in parallel relationship to the dividing wall 52 such that the grip surface 68 contacts the cable 10 and wedges it against the dividing wall 52 when cable 10 is pulled toward the second entrance port 46. Preferably grip surface 68 is concave in shape and has a plurality of abutting pyramid shapes formed thereon for conforming to the annular shape of cable 10 and gripping its surface along a longitudinal section.
In operation, upon entrance of the cable 10 within the second entrance port 46, cable 10 will abut angled surface 28 as shown in
As shown in
Although the invention has been described in detail above, it is expressly understood that it will be apparent to persons skilled in the relevant art that the invention may be modified without departing from the spirit of the invention. Various changes of form, design, or arrangement may be made to the invention without departing from the spirit and scope of the invention. Therefore, the above mentioned description is to be considered exemplary, rather than limiting, and the true scope of the invention is that defined in the following claims.
This application claims priority to U.S. Provisional Patent Application No. 60/658,628, filed Mar. 4, 2005.
Number | Date | Country | |
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60658628 | Mar 2005 | US |