Self-repositioning aerodynamic skirt

• US 8,678,474 B1
• Filed: 05/17/2013
• Issued: 03/25/2014
• Est. Priority Date: 01/29/2008
• Status: Active Grant

• Current Assignee: Transtex LLC (Southwestern Energy Company)
• Original Assignee: Transtex Composite Incorporated
• Inventors: Boivin, Mathieu, Desjardins, Philippe, Desjardins, Mathieu
• Primary Examiner(s): Dayoan, Glenn
• Assistant Examiner(s): CHENEVERT, PAUL A
• Application Number:
  US13/896,629
• Publication Number:
  US 20140070565A1
• Time in Patent Office: 312 Days
• Field of Search: 105/1.1, 105/1.2, 105/1.3, 180/903, 248/628, 248/632, 296/180.1, 296/180.4, D12/106
• US Class Current: 296/180.4
• CPC Class Codes: B60R 13/00 Elements for body-finishing, identifying, or decorating; Arrangements or adaptations for advertising purposes
• CPC Class Codes: B60R 13/0861 for covering undersurfaces of vehicles, e.g. wheel houses
• CPC Class Codes: B60R 19/565 on vehicle sides
• CPC Class Codes: B62D 35/001 For commercial vehicles or tractor-trailer combinations, e.g. caravans
• CPC Class Codes: Y10S 180/903 Airstream reactive vehicle or vehicle structure
• CPC Class Codes: Y10T 29/49826 Assembling or joining

Abstract

A resilient strut adapted to secure an aerodynamic skirt to a trailer is provided, the aerodynamic skirt comprising a skirt panel including a front portion and a rear portion adapted to be substantially longitudinally mounted to the trailer, the skirt panel being adapted to move away from the aerodynamic configuration when contacting a foreign object and to recover its aerodynamic configuration thereafter, the resilient strut includes a shape variation adapted to change the mechanical strength thereof and also adapted to sustain an elastic deformation allowing the resilient strut to bend when a load is applied to the resilient strut when the skirt panel moves away from the aerodynamic configuration and to self-recover its original shape when the load is removed. A kit of resilient struts, a method thereof and a trailer equipped with same are also provided.

Claims

1. An aerodynamic skirt assembly comprising:

a pair of skirt panels each adapted to be mounted to respective longitudinal sides of a trailer, each skirt panel including a front portion and a rear portion, the front portion being adapted to be mounted toward a forward portion of the trailer and the rear portion being adapted to be mounted toward a rear portion of the trailer in an original skirt panel aerodynamic configuration adapted to reduce air drag about the trailer when the trailer is in movement, and each skirt panel being adapted to independently move away from the original skirt panel aerodynamic configuration as a consequence of an external force caused by a physical contact between the skirt panel and an object not associated with the aerodynamic skirt assembly and the trailer to a visibly altered position detrimental to the air drag reduction obtained when the skirt panel is in the original skirt panel aerodynamic configuration, and to self-recover the original skirt panel aerodynamic configuration when the skirt panel is not in physical contact anymore with the object, for regaining the air drag reduction obtained when the skirt panel is in the original skirt panel aerodynamic configuration, and

a plurality of struts associated with each skirt panel and adapted to secure the skirt panel to the trailer, each strut comprising a skirt connecting portion, adapted to be secured to the skirt panel, and a trailer connecting portion, adapted to be secured to the trailer, each strut being flexible to accommodate relative movements between the skirt connecting portion and the trailer connecting portion thereof, each strut being adapted to sustain a substantial reversible elastic deformation from an original strut configuration when a force is applied thereon by the skirt panel moving away from the original skirt panel aerodynamic configuration as a result of an external force, and to self-recover the original strut configuration when the skirt panel is not sustaining the external force anymore, each strut being constructed with a material allowing a substantial elastic deformation thereof without recording substantial plastic deformation thereof, which allows the strut to move away from the original strut configuration and support the skirt panel away from the skirt panel aerodynamic configuration in the visibly altered position detrimental to the air drag reduction obtained when the skirt panel is in the original skirt panel aerodynamic configuration, and to self-recover the original strut configuration when the skirt panel is not sustaining the external force anymore, for recovering the air drag reduction obtained when the skirt panel is in the original skirt panel aerodynamic configuration.

2. The aerodynamic skirt assembly of claim 1, wherein the skirt panels are adapted to bend to allow a significant transversal displacement of a bottom portion of the skirt panels.

3. The aerodynamic skirt assembly of claim 2, wherein the transversal displacement of the bottom portion of the skirt panels can reach about 60 centimeters.

4. The aerodynamic skirt assembly of claim 1, wherein each strut is generally adapted to bend between the skirt connecting portion and the trailer connecting portion.

5. The aerodynamic skirt assembly of claim 1, wherein the skirt assembly includes composite materials offering a significant range of elastic deformation.

6. The aerodynamic skirt assembly of claim 1, wherein each strut includes multilayer composite material.

7. The aerodynamic skirt assembly of claim 1, wherein each strut includes fiber reinforced polypropylene.

8. The aerodynamic skirt assembly of claim 1, wherein each strut includes fiber-reinforced polypropylene.

9. The aerodynamic skirt assembly of claim 1, wherein each strut includes a combination of a polypropylene component and woven component.

10. The aerodynamic skirt assembly of claim 1, wherein each strut includes reinforced thermoplastic material.

11. The aerodynamic skirt assembly of claim 1, wherein the skirt panels and each strut are made of similar material.

12. The aerodynamic skirt assembly of claim 1, wherein each strut includes a portion thereof that has a wall thickness of about 4 millimeters.

13. The aerodynamic skirt assembly of claim 1, wherein each strut is adapted to reach a radius of about 20 centimeters without going into plastic deformation or breaking.

14. The aerodynamic skirt assembly of claim 1, wherein each strut has a three dimensional shape.

15. The aerodynamic skirt assembly of claim 1, wherein at least one of the struts defines a “

U”

shaped section.

16. The aerodynamic skirt assembly of claim 1, wherein at least one of the struts defines a concave portion that is uneven along the resilient strut.

17. An aerodynamic skirt assembly kit for reducing air drag of a trailer, the aerodynamic skirt assembly kit comprising:

a pair of skirt panels respectively including a front portion and a rear portion, each of the pair of skirt panels being adapted to be mounted to a respective longitudinal side of the trailer, the front portion being adapted to be mounted toward a forward portion of the trailer and the rear portion being adapted to be mounted toward a rear portion of the trailer in an original skirt panel aerodynamic configuration adapted to reduce air drag about the trailer when the trailer is in movement, each of the skirt panels being adapted to independently move away from the original skirt panel aerodynamic configuration as a consequence of an external force caused by a physical contact between the skirt panel and an object not associated with the aerodynamic skirt assembly and the trailer to a visibly altered position detrimental to the air drag reduction obtained when the skirt panels are in the original skirt panel aerodynamic configurations, and to self-recover the original skirt panel aerodynamic configuration when the skirt panel is not in physical contact anymore with the object, for regaining the air drag reduction obtained when the skirt panel is in the original skirt panel aerodynamic configuration,

a plurality of struts each comprising a skirt connecting portion and a trailer connecting portion adapted to accommodate relative movements thereof, each of the plurality of struts being adapted to sustain a substantial reversible elastic deformation from an original strut configuration when a force is applied thereon by one of the skirt panels when moving away from its original skirt panel aerodynamic configuration as a result of an external force, and to self-recover the original strut configuration when the skirt panel is not sustaining the external force anymore, the plurality of resilient struts being constructed with a material allowing a substantial elastic deformation without recording substantial plastic deformation, which allows the plurality of struts to move away from the original strut configurations and support the skirt panels away from the skirt panel aerodynamic configurations in the visibly altered position detrimental to the air drag reduction obtained when the skirt panels are in the original skirt panel aerodynamic configurations, and to self-recover the original strut configurations when neither of the skirt panels is in physical contact with an object, for recovering the air drag reduction obtained when the skirt panels are in the original skirt panel aerodynamic configurations.

18. The aerodynamic skirt assembly kit of claim 17, further comprising supports adapted to secure an upper portion of the skirt panel to the trailer.