Folding ramp system

• US 7,258,384 B2
• Filed: 04/19/2005
• Issued: 08/21/2007
• Est. Priority Date: 04/19/2005
• Status: Expired due to Fees

• Current Assignee: GM Global Technology Operations LLC (General Motors Company)
• Original Assignee: GM Global Technology Operations Incorporated (General Motors Company)
• Inventors: Ovenshire, Jay H., Mitchenall, David, Drabik, Mark, Harrod, Brian, Hollewa, Kenneth V.
• Primary Examiner(s): PAPE, JOSEPH
• Application Number:
  US11/109,268
• Publication Number:
  US 20060232089A1
• Time in Patent Office: 854 Days
• Field of Search: 296/61, 296/57.1, 14/695, 14/711, 414/537, 414/480, 414/921
• US Class Current: 296/61
• CPC Class Codes: B60P 1/435 the ramp being attached to or making part of the side- or tailboards of the vehicle
• CPC Class Codes: B62D 33/0273 Movable tailboards for vehicles comprising non-movable sideboards, e.g. pick-up trucks B62D33/037 takes precedence

Abstract

A pair of folding ramps each of which having a hinge connecting a first ramp section pivotally to a second ramp section. When in a fully unfolded state, structural support adjacent the hinge is provided by a tension cable assembly composed of a tension cable connecting to the first and second ramp sections and passing over an end of a mast, wherein the mast is connected with the hinge so as to be pivotal with respect to the first and second ramp sections. When in a fully folded state, the folding ramps are stored within a ramp storage receptacle of a tail gate.

Claims

1. A folding ramp, comprising:

a first ramp section having an underside;

a second ramp section having an underside;

a pair of first longitudinal beams connected to said underside of said first ramp section;

a pair of second longitudinal beams connected to said underside of said second ramp section;

a hinge pivotally connecting said first ramp section to said second ramp section; and

a tension cable assembly located at said underside of said first and second ramp sections, said tension cable assembly comprising;

a tension cable having a first end connected said first ramp section adjacent a distal end thereof, and a second end connected to said second ramp section adjacent a distal end thereof; and

a mast having a base connected to said hinge in pivotal relation to both of said first and second sections, said mast having an end opposite said base at which said tension cable is generally located;

wherein said first and second ramp sections are foldable between a fully folded state of the folding ramp and a fully unfolded state of the folding ramp;

wherein when said first and second ramp sections are in said fully unfolded state of the folding ramp, said tension cable is substantially taut;

wherein said pairs of first and second longitudinal beams are located such that at said fully folded state of the folding ramp, said pairs of first and second longitudinal beams nest with respect to each other; and

wherein said hinge comprises a hinge pin, a pair of primary hinge barrels pivotal on said hinge pin, and a pair of secondary hinge barrels pivotal on said hinge pin independently of said pair of primary hinge barrels;

wherein;

each of said first longitudinal beams is connected to a respective one of said primary hinge barrels of said hinge; and

each of said second longitudinal beams is connected to a respective one of said secondary hinge barrels of said hinge.

2. The folding ramp of claim 1, wherein said hinge further comprises at least one tertiary hinge barrel pivotal on said hinge pin independently of said primary and secondary hinge barrels;

wherein said base of said mast is connected to said at least one tertiary hinge barrel.

3. The folding ramp of claim 2, further comprising a cable guide rotatably mounted to said end of said mast, said tension cable being engaged by said cable guide such that said tension cable is located at said end of said mast.

4. The folding ramp of claim 3, further comprising a head connected to said first ramp section at an obtuse angle relative thereto.

5. The folding ramp of claim 1, further comprising a cable guide rotatably mounted to said end of said mast, said tension cable being engaged by said cable guide such that said tension cable is located at said end of said mast.

6. A folding ramp system, comprising:

a motor vehicle tail gate, said tail gate having a ramp storage receptacle formed therein; and

a pair of folding ramps, each folding ramp of said pair of folding ramps comprising;

a first ramp section having an underside;

a second ramp section having an underside;

a pair of first longitudinal beams connected to said underside of said first ramp section;

a pair of second longitudinal beams connected to said underside of said second ramp section;

a hinge pivotally connecting said first ramp section to said second ramp section; and

a tension cable assembly located at said underside of said first and second ramp sections, said tension cable assembly comprising;

a tension cable having a first end connected said first ramp section adjacent a distal end thereof, and a second end connected to said second ramp section adjacent a distal end thereof; and

a mast having a base connected to said hinge in pivotal relation to both of said first and second sections, said mast having an end opposite said base at which said tension cable is generally located;

wherein said first and second ramp sections are foldable between a fully folded state of the folding ramp and a fully unfolded state of the folding ramp; and

wherein when said first and second ramp sections are in said fully unfolded state of the folding ramp, said tension cable is substantially taut;

wherein said ramp storage receptacle is dimensioned to receive thereinto said first and second folding ramps when said first and second folding ramps are in said fully folded state;

wherein said pairs of first and second longitudinal beams are located such that at said fully folded state, said pairs of first and second longitudinal beams nest with respect to each other; and

wherein said hinge comprises a hinge pin, a pair of primary hinge barrels pivotal on said hinge pin, and a pair of secondary hinge barrels pivotal on said hinge pin independently of said pair of primary hinge barrels;

wherein;

each of said first longitudinal beams is connected to a respective one of said primary hinge barrels of said hinge; and

each of said second longitudinal beams is connected to a respective one of said secondary hinge barrels of said hinge.

7. The folding ramp system of claim 6, wherein said hinge further comprises at least one tertiary hinge barrel pivotal on said hinge pin independently of said primary and secondary hinge barrels;

wherein said base of said mast is connected to said at least one tertiary hinge barrel.

8. The folding ramp system of claim 7, further comprising a cable guide rotatably mounted to said end of said mast, said tension cable being engaged by said cable guide such that said tension cable is located at said end of said mast.

9. The folding ramp system of claim 8, further comprising a head connected to said first ramp section at an obtuse angle relative thereto.

10. The folding ramp system of claim 9, further comprising an access panel pivotally connected to said tail gate, wherein said access panel selectively covers said ramp storage receptacle.

11. The folding ramp system of claim 10, further comprising a plurality of posts connected with said tail gate and located within said ramp storage receptacle;

wherein said first and second foldable ramps have openings through which said plurality of posts pass when said first and second folding ramps are located within said ramp storage receptacle, and wherein said access panel abuts said plurality of posts when said access panel covers said ramp storage receptacle.

12. The folding ramp system of claim 11, further comprising:

a lip on said head; and

a boss on said tailgate which engages said lip.