Jack assembly

• US 8,523,148 B2
• Filed: 07/16/2008
• Issued: 09/03/2013
• Est. Priority Date: 07/16/2007
• Status: Active Grant

• Current Assignee: Horizon Global Americas Inc. (Horizon Global Corporation)
• Original Assignee: Cequent Trailer Products Incorporated (Cequent Performance Products Incorporated)
• Inventors: Beck, Russ, Anderson, Eric, Peschmann, Joseph J., Okerlund, Kawa-She-Quoen, Walstrom, Todd, Trowbridge, Todd
• Primary Examiner(s): Wilson, Lee D
• Assistant Examiner(s): GRANT, ALVIN J
• Application Number:
  US12/218,515
• Publication Number:
  US 20090057633A1
• Time in Patent Office: 1,875 Days
• Field of Search: 254/420, 254/425, 254/419, 254/100, 280/475, 280/414.1, 280/490.1
• US Class Current: 254/420
• CPC Class Codes: B60D 1/66 Props
• CPC Class Codes: B60D 1/665 comprising supporting wheels, e.g. dollies
• CPC Class Codes: B60S 9/18 mechanically
• CPC Class Codes: B60S 9/22 Means for attaching lifting, supporting, or manoeuvring devices to vehicles for separate devices B60S11/00
• CPC Class Codes: B66F 3/16 actuated through bevel-wheel gearings

Abstract

An improved jack assembly for use with a trailer tongue of a towed vehicle. The jack assembly including telescoping height adjustment of the assembly, a pivot assembly for pivoting between a vertical and horizontal stowed position, and a clip for maintaining a handle assembly in a stowed position when not in use. The jack assembly also includes the use of bushings for the telescoping tubes to enhance the sliding movement between the tubes and aid in maintaining the axial alignment of the tubes thereby extending the life of the jack assembly. The pivot assembly further includes an attachment bracket that may be rotated to accommodate at least two different sizes of trailer tongues.

Claims

1. A jack assembly for a towed vehicle, the jack assembly comprising:

a first member;

a second member telescopingly engaged with said first member, said second member having end portions and a length therebetween;

a pivot assembly connected to said second member such that no compressive force is applied to said first member and said pivot assembly is capable of mounting to a trailer, wherein said pivot assembly is positionable along at least a portion of said length of said second member; and

wherein said pivot assembly selectively rotates said first and second members to generally horizontal and vertical positions relative to said trailer independent of said positionability of said pivot assembly on said second member.

2. The jack assembly of claim 1, wherein said pivot assembly includes a pivot housing, a slide block, a pivot block and an attachment bracket for mounting to said trailer.

3. The jack assembly of claim 2, wherein said attachment bracket can be rotated to accommodate trailers having tongues of at least two different heights.

4. The jack assembly of claim 2, wherein said pivot housing rotates relative to said pivot block about a pivot axis.

5. The jack assembly of claim 4, further comprising a pull pin coupled to said pivot housing wherein said pull pin is arranged to selectively lock and unlock said pivot housing relative to said pivot block.

6. The jack assembly of claim 2, wherein a fastener attaches said slide block to said pivot block and said pivot housing.

7. The jack assembly of claim 6, wherein said pivot block and said pivot housing bear loads during rotation of pivot assembly and wherein said fastener is generally free from loads during rotation of said pivot assembly.

8. The jack assembly of claim 2, wherein said first member includes an inner tube and said second member includes an outer tube.

9. The jack assembly of claim 8 further comprising a slot running at least a portion of said length of said outer tube.

10. The jack assembly of claim 9, wherein said pivot assembly is slidably connected in said slot by said slide block wherein said slide block may be positioned at any location along said slot of said outer tube.

11. The jack assembly of claim 10, wherein said slide block is connected to said pivot block.

12. The jack assembly of claim 11, wherein said pivot block and said slide block are arranged to secure said pivot assembly to said outer tube.

13. The jack assembly of claim 9, wherein said slot generally prevents said slide block from pivoting.

14. The jack assembly of claim 1, wherein said pivot assembly is positionable along an entirety of said length between said end portions of said second member.

15. A jack assembly for a towed vehicle, the jack assembly comprising:

a first tube and having a cross-sectional shape;

a second tube telescopingly engaged with said first tube;

telescoping mechanism operatively coupled with said first and second tubes, wherein said telescoping mechanism telescopingly positions said first tube relative to said second tube; and

a first bushing having a generally corresponding shape as said cross-sectional shape of said first tube, wherein said first bushing is attached to said first tube and positioned between said first and second tubes such that said first and second tubes do not contact during telescoping of said first and second tubes.

16. The jack assembly of claim 15 further comprising a second bushing attached to said second tube and positioned between said first and second tubes such that said first and second tubes do not contact during telescoping of said first and second tubes.

17. The jack assembly of claim 16, wherein said second bushing is secured to a lower end of said second tube such that a portion of said second bushing is positioned between said first and second tubes.

18. The jack assembly of claim 17, wherein said second bushing includes an opening to accommodate said first tube.

19. The jack assembly of claim 16, wherein attaching said first bushing and said second bushing to their respective tubes maintains axial alignment of said first and second tubes.

20. The jack assembly of claim 16, further comprising a jack nut wherein said jack nut is attached to said first bushing.

21. The jack assembly of claim 16, wherein said second tube includes a cross-sectional shape and wherein said second bushing has a generally corresponding shape as said cross-sectional shape of said second tube.

22. The jack assembly of claim 15, wherein said first bushing is secured to an upper end of said first tube such that a portion of said first bushing is positioned between said first and second tubes.

23. A jack assembly for a towed vehicle, the jack assembly comprising:

an inner tube;

an outer tube telescopingly engaged with said inner tube;

a gear housing located adjacent an upper end of said outer tube, wherein said gear housing includes an aperture extending through an outer wall of said gear housing and a blind bore;

a handle assembly having a crank member and a stem attached to said crank member, wherein said stem is inserted through said aperture and into said blind bore of said gear housing wherein rotation of said handle assembly causes said outer tube to move telescopically relative to said inner tube; and

wherein said aperture and blind bore act as a bushing during rotation of said handle assembly.

24. The jack assembly of claim 23, wherein said gear housing includes a cap secured to a top portion of said gear housing to form a sealed gearbox.

25. The jack assembly of claim 23, wherein said handle assembly further includes a clip to secure said handle assembly in a generally parallel position to said outer tube and to prevent said handle from rotating when in a stowed position.

26. The jack assembly of claim 23, wherein said aperture and blind bore are positioned on opposite walls of said gear housing.

27. A jack assembly for a towed vehicle, the jack assembly comprising:

a first member;

a second member telescopingly engaged with said first member, said second member having end portions and a length therebetween;

a slot positioned on said second member and running at least a portion of said length of said second member;

a pivot assembly having a pivot housing, a slide member, and a pivot member wherein said slide member is positioned within said slot of said second member, wherein said pivot assembly is positionable along at least a portion of said slot; and

wherein said pivot assembly selectively rotates said first and second members to generally horizontal and vertical positions relative to said trailer independent of said positionability of said pivot assembly on said slot.