1. Field of the Invention
This invention relates to a pull tight seal or cable tie with a predetermined break-away position for removal of a tail. In one example, the invention relates to a pull tight seal including a tag or label for marking devices such as fire extinguishers or other containers.
2. Description of the Related Art
In conventional pull tight seals that are installed on devices, for example, fire extinguishers, the user wraps the pull tight seal around the device, and the user pulls a tail portion through a locking portion of the pull tight that locks barbs via a ratchet effect. The tail cannot be pulled backward through the lock due to the shape of the barbs, which allow motion through the lock in only one direction. A similar arrangement is provided for so-called “cable ties,” and the term “tie” will be used to identify a group including both pull tight seals and cable ties.
In conventional ties, after fastening, part of the tail often protrudes from the end of the locking portion and can interfere with inspection of the tie after installation. Additionally, this unwieldy portion of the tail can get caught in other devices or seals when moving or using the device. This protruding portion of the tail is particularly problematic when the tie is installed in fire a extinguisher, which is often used in emergency situations.
Accordingly, one aspect of the present invention provides a flexible tie including a head having a first cross-sectional geometry and a tail extending from the head in a longitudinal direction and having a second cross-sectional geometry different from the first cross-sectional geometry. The tie includes a lock disposed on the head and including a passage configured to receive the tail and a plurality of barbs disposed on the tail and configured to pass through the passage in the lock in a first direction, and configured to be restricted from retreating through the passage in a second direction opposite to the first direction. The tie also includes a tail break-point disposed on the tail and including a first cross-sectional area, as viewed along the longitudinal direction, smaller than any other cross-sectional area of the tail as viewed along the longitudinal direction. In some configurations, the tie includes a visual indicator in the head.
These and other advantages of the invention will become more apparent and more readily appreciated from the following detailed description of the exemplary embodiments of the invention taken in conjunction with the accompanying drawings where:
Embodiments of the present invention will be described hereinafter with reference to the accompanying drawings. In the following description, the constituent elements having substantially the same function and arrangement are denoted by the same reference numerals, and repetitive descriptions will be made only when necessary.
With reference to
The head 5 further includes a lock protrusion 75. The lock protrusion 75 includes a lock 70 and typically includes one or more tab 72 disposed on or near the lock 70. As shown in
As further shown in
As shown in
If the optional stopper 40 is disposed on the tail 60, then the barbs 10 disposed between the head 5 and the stopper 40 will typically be unused inasmuch as these barbs will not pass through the lock 70 during attachment.
The barbs 10 disposed between the stopper 40 and the end of the tie 1 opposite the head 5 are used to secure the tie 1 in the lock 70. As shown in
Preferably, the ratio of diameter of the predetermined break-away 50 to the diameter or largest dimension of the core portions 20 is 2/3 in order to allow a significant difference in tensile strength between these two components and to ensure that the predetermined break-away 50 breaks before any of the core portions 20 or other parts of the tail 60 break. Preferably, the outermost dimension or diameter of the predetermined break-away 50 is approximately 0.04 inches. Additionally, it is preferable that the predetermined break-away 50 be approximately 0.10 inches long in order to provide a visible indication of the break point to a user prior to breaking. It should be noted that in some embodiments, the cross-section of the tail is not circular. Similarly, in some embodiments, the cross-section of the predetermined break-away 50 is not circular. In examples where the cross-section of one or both of the tail 60 and predetermined break-away 50 is not circular, it is preferred that similar breakage characteristics are provided by the tail 60 and predetermined break-away 50 to those noted above regarding the 2/3 diameter. In other words, the ratio of cross-sectional area of the tail 60, in the direction the tail 60 extends from the head 5, is larger than the cross-sectional area of the predetermined break-away 50. Preferably, when one or more of the predetermined break-away 50 and tail 60 is non-circular, the ratio of the cross-sectional area of the predetermined break-away 50 to the minimum cross-sectional area of the tail 60 other than the predetermined break-away 50 is 4/9, just as it would be for circular cross-sections when the ratio of the diameters is 2/3.
As further shown in
In practice, the user wraps the tie 1 around an object to be secured or tagged, and the user pulls the tail 60 through the lock 70 until at least one of the barbs 10 are locked by the tab 72. Due to the shape of the barbs 10, the barbs 10 cannot be easily pulled back through the lock 70, and the tie 1 is permanently wrapped around the object until the tie 1 is cut or otherwise damaged. If the optional stopper 40 is present, the user will typically pull the tail 60 until it “bottoms out” on the stopper 40. At this point, or when the tie grips the object if no stopper is present, the user pulls with greater force, and the tail 60 will break at the predetermined break-away 50 while leaving no portion, or only a short stub, of the tail 60 protruding from the lock 70. Thus, the predetermined break-away 50 allows a clean break to be formed without an unwieldy portion of the tail 60 dangling from the lock 70, which could get caught or tangled on other objects. This clean break is particularly helpful when tagging fire extinguishers as these are often handled during emergency situations.
Although only certain embodiments of this invention have been described in detail above, those skilled in the art will readily appreciate that many modifications are possible in the exemplary embodiment without materially departing from the novel teachings and advantages of this invention. Accordingly, all such modifications are intended to be included within the scope of this invention.
Number | Name | Date | Kind |
---|---|---|---|
3467427 | Moberg | Sep 1969 | A |
3830538 | Moberg | Aug 1974 | A |
4506415 | Swift | Mar 1985 | A |
4514882 | Lavielle | May 1985 | A |
4537432 | Meeks | Aug 1985 | A |
6449808 | Zappa et al. | Sep 2002 | B1 |
6523228 | Benoit | Feb 2003 | B1 |
6928701 | Hutter, III | Aug 2005 | B2 |
7127779 | Hewes | Oct 2006 | B2 |
7281302 | Hewes | Oct 2007 | B2 |
20080066265 | Pilon et al. | Mar 2008 | A1 |
Number | Date | Country | |
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20110308047 A1 | Dec 2011 | US |