The present invention relates to vehicle parts and components; and more specifically, to guides or directors for tubing utilized on a vehicle for conveying fluids and/or communicating pressure.
Fluid conveying tubing is used on vehicles for various applications including gases, such as air, hydraulic oil, water, fuel and other liquids, and even mixed-phase fluids having both gaseous and liquid constituencies.
Those persons skilled in the relevant vehicular arts will readily recognize the problems that can result from disorganized tubing systems.
A related situation often encountered on commercial vehicles is found at the back of the cab of a truck where sets of tubes have traditionally been found that are unorganized and uncontrolled. It may be appreciated that each individual tube is adapted for interconnection and securement to the vehicle at distal ends thereof, but are otherwise left free to swing about, potentially becoming entangled with one another, and at a minimum, slapping into adjacent portions of the vehicle with a possible result being damage to the vehicle's finish. A more serious operational concern, however, is the likelihood that damage will instead be caused to the tubing itself over prolonged periods of time, potentially resulting in related system failures.
A similar situation can also be appreciated in conventional configurations found at the back of truck cabs wherein undirected tubing can lie against or on vehicle components. Among other detrimental effects, such contact with other vehicle components (obstacles) can result in wear to the tubing and/or entanglement therewith, both of which are undesirable from an operational point of view.
In the vehicular arts, pneumatic systems are commonly known and generally refer to the use of pressured air to perform certain functions. In such systems, it should be appreciated that pressured air can flow through the conveyance tubing, or air may be held substantially static within the tubing, with induced pressure changes communicated thereacross. One well-known example is the use of air-actuated, pneumatic brakes on commercial vehicles. On a commercial vehicle, there is typically a common source of pressured air that is distributed via conduits to different locations upon the vehicle. Frequently, pneumatic air distribution is effected through plastic tubing. Normally such air pressure distribution tubing has a certain degree of flexibility, especially over relatively long lengths, but when shorter lengths of conduit are considered, the tubing generally possesses a stiffness quality that resists lengthwise deformation or bending. These characteristics precipitate the kinking or crimping propensities that are common to such tubing when bent to too great an extent. Such kinking and crimping detrimentally compromises and/or precludes fluid throughput in the effected tubing, and therefore is desirably avoided.
Drawbacks related with such right-angle adapters, however, include a relatively high cost for parts and labor for installation, as well as a propensity for leakage. For these reasons a quick-connect has been developed that allows the pneumatic tubes to be stab-inserted directly into the annuluses of the distribution valve. A negative consequence of this assembly, however, is that the pneumatic tubes project from the distribution valve in the direction of the annuluses, thereby taking up valuable space with their resulting spider leg-type configuration. Such arrangements make the tubes likely to encounter proximate components as obstacles as discussed above. Therefore, it has been recognized as desirable to provide adaptations to these radially projecting tubes that affect a quick bend from the radial direction thereby directing the tube in a desired direction more quickly.
In another aspect, tube conveyances, particularly those that are oriented lengthwise with respect to the vehicle, are often located within the interior space of frame members. Frequently such frame-borne tubing is installed prior to certain heat treatments being applied to the frame such as during painting and for anti-corrosion. In that such tubing is typically constructed from plastic, these heat treatments can significantly soften the tubing and permit it to sag between support points, or even collapse upon itself under its own weight. In either case, the fluid throughput of a so-effected conduit can be sufficiently compromised that it requires post heat treatment replacement, which is an expensive, time-consuming and undesirable consequence.
The present invention has been developed to meet the above described needs, as well as provide additional benefits which will become evident from the disclosure provided herein.
The present invention, though elegantly simple in nature, provides a host of benefits to owners and operators of all types of vehicles, and particularly those owners and operators of commercial vehicle fleets. As discussed hereinabove, there is a clearly recognizable need for tools that enable the organization and designer-directed orientation of tubes carried upon vehicles. The present invention provides just such a shaping guide for vehicle tubing that can be advantageously applied directly upon the tube itself, without support or interference with any surrounding structure. This is highly beneficial in that it makes the customization and direction of tubing courses or paths substantially independent of environmental structures, many of which have been previously seen as obstacles, and with which contact is desirably avoided.
Therefore, primary benefits associated with the present invention's inclusion are that it enables direction of individual tubes, for instance, around a particular obstacle, and in the aggregate, to organize and control multi-tubing bundles or systems. In the first instance, the avoidance of obstacles protects the tubing and the obstacle structure from potentially wearing contact therebetween. In an associated aspect, the shaping guide, if positioned between the tube and obstacle, acts as a buffer between the two elements should contact occur; and moreover, the guide acts as a protector to the supporting tube by preventing wear-degradation that can occur from undesirable contact with neighboring structures (see
In this regard, at least one embodiment of the present invention may be characterized as a shaping guide for tubing carried on a vehicle and that has elastic deformation characteristics. The guide includes an elongate guide body configured to be supported exclusively on an elastically deformable tubing section that is to be bent from a natural shape into a bent shape while in use upon the vehicle. In this regard, the natural shape of the tubing is that which it assumes when no outside forces are imposed thereupon. It should be appreciated that this natural shape may be straight or curved, but is typically slightly curved due to the fact that tubing is normally stored in a coiled configuration prior to installation. The guide body defines an interior trap space in which an installed tubing section is retained once positioned therein.
A further beneficial aspect of the invention stems from its substantially continuous support of the tube along the length of the guide. This continuous support enables a more acute angle to be imposed on the tube than its prescribed minimum radius. Tubing manufacturer's specifications typically prescribe a minimum radius around which the tubing should be allowed to bend to avoid the possibility of kinking the tube. Through the full support provided by the instant shaping guide, however, it has been discovered that this prescribed minimum radius can be reduced by as much as ten percent, or more. As an example, where a minimum radius of ten inches has been prescribed, utilization of the guide permits at least a ten percent reduction, which in the present illustrative case would be to a nine inch minimum radius. Where packaging is of paramount concern such as in the tight space of a vehicle's engine compartment, the ability to effect such a tubing bend-radius reduction is highly advantageous. Therefore, in one aspect, the shaping guide constitutes a means for bending an installed tubing section on a radius lesser than its prescribed minimum bend radius.
In a related but different application of the present invention, the shaping guide can be configured to have a substantially straight body, or at least one of lesser curvature than described above with respect to imposing tight bending radii in concerned tubing. With regard to the heat treating processes earlier discussed and to which tubing located in vehicle frame members may be required to undergo, shaping guides according to the present invention may be utilized to maintain the shape of the tubing during such heat treatment thereby preventing deformation of the tubing structure itself. It is contemplated that in this type of application, the guide may be exclusively supported upon the tube, or may be partially supported on other structure of the vehicle thereby actually acting as a support to the tube, as opposed to merely a guide for its shape. In any event, maintenance of the desired shape and configuration of the tube through such heat treating processes is highly desirable and eliminates the high cost and time delay of replacing heat-damaged tubing which sometimes has previously occurred.
In this regard, at least one embodiment of the present invention may be characterized as a shape maintaining guide for tubing that is carried on a vehicle that undergoes heat processing at temperatures sufficiently high to permit plastic deformation (sag or collapse) of the tubing's shape under the tubing's own weight. For example, such heat treatment includes painting and anti-corrosion processes to which tube-carrying frame members of the vehicle may be subjected. The guide includes an elongate guide body configured to be at least partially supported on an elastically deformable tubing section that is to be maintained in a prescribed (required in the design criteria or specification) configuration while undergoing heat processing at temperatures sufficiently high to permit plastic deformation of the tubing's shape under the tubing's own weight. The guide body defines an interior receiving or trap space in which an installed tubing section is received, and optionally retained once positioned therein.
In a particularly advantageous embodiment, and that which is depicted in the accompanying drawings, the shaping guide is of a snap-on design, preferably constructed from semi-rigid plastic. The utilization of such plastic for the construction of the guide body is particularly desirable because the general shape of the guide is maintained by the semi-rigid qualities of the plastic for establishing the desired shape and course of the associated tubing. The plastic used in the guide's construction, however, is chosen to also have a minor degree of flexibility that accommodates its snap-on aspect which requires temporary expansion of a slotted opening into the guide for the tubing to be installed into the interior trap space of the guide.
Another beneficial aspect of utilizing plastic in the construction of the guide body is its light weight nature. As discussed hereinabove, the shaping guide of the present invention is designed to be exclusively supported upon the tubing it directs. Therefore it is highly desirable that the presence of the guide, and particularly its added weight, not negatively impact the tube upon which it is supported. For instance, utilizers of the guide will not want its inclusion to impose unnecessary “pulling” forces on secured ends of the concerned tubing. Still further, unnecessarily weighty guides could cause sagging along the supporting tube's length, or even induce undesired movement amplitude that would not occur in the tube alone. For these reasons, plastic is not merely a design choice, but instead provides a host of beneficial aspects that are considered desirable where the present invention is concerned.
These beneficial features of the several disclosed embodiments of the present invention will be appreciated by those persons skilled in the relevant arts, as will other benefits when the whole of the disclosure is considered.
Exemplary embodiments and environmental use aspects of the present invention are depicted in the accompanying drawings wherein:
In the accompanying drawings, tubing systems on various vehicles are depicted that can be improved through the utilization of the presently disclosed tubing shaping guide and/or support. Areas on certain vehicles that benefit from shaping guide installation are illustrated as examples. Still further, details of exemplary constructions and installations of the shaping guides are also shown. It should be appreciated that the description contained herein provides an example of implementations of the disclosed inventions, but the legal bounds of the afforded patent protection are exclusively defined by the words of the associated claims.
Referring to
In an alternative configuration of the invention that is also depicted in
An aspect of an exemplary method of guide production is evidenced by the scored recess 80 provided at the securing portion 65 located in the mid-portion 77 of the shaping guide 50. The groove 80 is used as indicia for where the shaping guide 50 can be subdivided into shorter portions.
In one preferred embodiment, the invention takes the form of a shaping guide 50 for tubing 40 that is carried on a vehicle 20 and such tubing 40 has elastic deformation characteristics. The shaping guide 50 comprises an elongate guide body 51 configured to be supported exclusively on an elastically deformable tubing section 40 that is to be bent from a natural shape into a bent shape while in use upon the carrying vehicle 51. The guide body 51 defines an interior trap space 68 in which an installed tubing section 40 is retained once positioned therein.
A longitudinal axis 52 extends between two distal ends 74 of the shaping guide 50 and the longitudinal axis 52 has a lengthwise shape that substantially defines the bent shape of the installed tubing section.
As illustrated in
The interior trap space 68 has a tubing-facing surface 71 configured to form a substantial conformance fit with the exterior surface 41 of an installed tubing section. In this example, the tubing-facing surface 71 is substantially round in cross-sections taken perpendicular to the longitudinal axis 52. Advantageously, the tubing-facing surface 71 of the elongate guide body 51, at a first cross-section taken perpendicular to the longitudinal axis (see 82 in
In a related aspect, it is beneficial if a particular shaping guide 50 is sized to be useable on a common tubing size of English unit measure and also on a common tubing size of metric unit measure. One example is the provision of a shaping guide 50 having an interior trap space configured/sized to establish a substantial conformance fit about both one-quarter inch round tubing and six millimeter round tubing. Another example is the provision of a shaping guide 50 having an interior trap space configured/sized to establish a substantial conformance fit about both one-half inch round tubing and twelve millimeter round tubing.
As previously indicated, the described and illustrated exemplary embodiments are intended to assist persons skilled in the art to understand the presently disclosed invention, and are not to be considered as limitations upon the afforded patent protection which is exclusively recited in the following patented claims.
Filing Document | Filing Date | Country | Kind | 371c Date |
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PCT/US05/03930 | 2/8/2005 | WO | 00 | 8/7/2007 |