Portable ladder for truck trailers

• US 5,964,317 A
• Filed: 09/15/1998
• Issued: 10/12/1999
• Est. Priority Date: 09/15/1998
• Status: Expired due to Term

• Current Assignee: Philip E. Lattavo
• Original Assignee: Philip E. Lattavo
• Inventors: Lattavo, Philip E.
• Primary Examiner(s): Stodola, Daniel P.
• Assistant Examiner(s): Thompson, Hugh B.
• Application Number:
  US09/153,618
• Time in Patent Office: 392 Days
• Field of Search: 182/90, 182/92, 182/93, 182/100, 182/127, 280/163, 280/165, 280/166
• US Class Current: 182/127
• CPC Class Codes: E06C 1/381 Ladders with rungs or treads attached only to one rigid longitudinal member
• CPC Class Codes: E06C 5/02 with rigid longitudinal members

Abstract

A portable ladder for truck trailers including a post, a hand grip attached to the post, at least a first step connected to the post, and a stake connected to the post is adapted to be used in conjunction with a flat-bed trailer having a body and a protective rail. The stake is adapted to removably and slidably mount in the space between the body and the protective rail with the stake being inserted into the space until a support plate rests flush against the top of the trailer body. The steps extend outwardly and alternately from opposite sides of the staff. The stake forms an angle with the post such that when the stake is installed in the space between the body and the rail of the flat-bed truck, the lower end of the staff extends downward and outwardly from the truck so that a person can easily climb up the ladder onto the trailer while having a hand grip to hold onto.

Claims

1. A portable ladder adapted to be used with a flat-bed trailer, the trailer having a trailer body with a protective rail spaced from the body, said portable ladder comprising:

a post, said post having a longitudinal axis;

at least a first step connected to said post;

a stake connected to said post, said stake adapted to be removably and slidably mounted in the space between the protective rail and the trailer body;

said stake having at least one lug having a longitudinal axis with the longitudinal axis of the lug and the longitudinal axis of the post forming an angle of between substantially 0 degrees and substantially 75 degrees; and

a stabilizing plate connected to one of said stake and said post;

said stabilizing plate being disposed substantially perpendicular to said longitudinal axis of the said stake and stabilizing plate adapted to engage and rest on the body of the trailer.

2. The portable ladder as set forth in claim 1, further comprising at least a second step, said second step extending from said post on an opposite side than said first step.

3. The portable ladder as set forth in claim 2, further comprising a handgrip disposed above said post.

4. The portable ladder as set forth in claim 3 wherein said handgrip is formed integrally with said post.

5. The portable ladder as set forth in claim 4, wherein said stake includes a pair of lugs;

said lugs being spaced apart.

6. The portable ladder as set forth in claim 5, wherein said lugs are substantially perpendicular to said stabilizing plate.

7. The portable ladder as set forth in claim 6, wherein said longitudinal axis of each lug forms an angle with said longitudinal axis of said post of between substantially 5 and substantially 20 degrees.

8. The portable ladder as set forth in claim 7, wherein said handgrip is an extension of the said post and is substantially parallel with said longitudinal axis of said post.

9. The portable ladder as set forth in claim 8 further comprising a safety flange connected to each of said steps.

10. The portable ladder as set forth in claim 9 further comprising a brace assembly disposed between said stabilizing plate, said stake, and said post.

11. The portable ladder as set forth in claim 10, further comprising at least a third step, said steps extending outwardly and alternately from said post.

12. The portable ladder as set forth in claim 11 wherein each said lugs is formed with a hole therein.

13. The portable ladder as set forth in claim 12, wherein said longitudinal axis of each lug forms an angle with said longitudinal axis of said post of substantially 7 degrees.

14. The portable ladder as set forth in claim 13, further comprising hand grip that extends upwardly from said post above said stabilizing plate.

15. In combination, a portable ladder and a flat-bed trailer, the flat-bed trailer having a substantially flat trailer body and a protective rail spaced from said trailer body to form a space;

said portable ladder including a central post having a longitudinal axis, at least one step extending from said post, and a stake extending down from said post, said stake, having at least one lug having a longitudinal axis with the longitudinal axis of the lug and the longitudinal axis of the post forming an angle of between substantially 0 degrees and substantially 75 degrees;

said lug selectively slidably and removably disposed in said space between said protective rail and said trailer body with said post extending down from said protective rail;

said protective rail disposed between said post and said lug;

said ladder supported by said protective rail;

whereby the portable ladder may be selectively installed on the trailer by sliding the lug between the protective rail and trailer body and may be removed by lifting the ladder so that the lug slides out from between the protective rail and the trailer body.

16. The combination as set forth in claim 15, further comprising a stabilizing plate connect to one of said post and said stake, said stabilizing plate resting on at least said trailer body.

17. The combination as set forth in claim 16, wherein said lug is substantially perpendicular to said stabilizing plate;

said post extending above said stabilizing plate to form a hand grip.

18. In combination, a portable ladder and a flat-bed trailer, the flat-bed trailer having a substantially flat trailer body and a protective rail spaced from said trailer body to form a space;

said portable ladder including a central post, at least one step extending from said post, a stake connected to said post, and a stabilizing plate connected to said stake;

said stake having a least one lug;

said post having a longitudinal axis and said lug having a longitudinal axis;

said longitudinal axis of said post forming an angle with said longitudinal axis of said lug of between substantially five degrees and twenty degrees;

said stabilizing plate being substantially perpendicular to said longitudinal axis of said lug; and

said stake selectively slidably and removably disposed in said space between said protective rail and said trailer body with said post extending down from said protective rail with said stabilizing plate resting on at least said trailer body whereby the portable ladder may be selectively installed on the trailer by sliding the stake between the protective rail and the trailer body and may be selectively removed from the trailer by lifting the portable ladder so that the stake slides out from between the protective rail and the trailer body.