Ladder attachment platform

Patent metadata

Field	Value
Publication number	US-RE49130-E
Application number	US-202017115930-A
Country	US
Kind code	E1
Filing date	Dec 9, 2020
Priority date	Apr 29, 2010
Publication date	Jul 12, 2022
Grant date	Jul 12, 2022

Abstract

A ladder attachment platform is provided that includes a base for attachment to a ladder that has first and second side rails and a plurality of rungs that extend between in a lateral direction. Also included is a user platform for having a user stand thereon that is carried by the base. The user platform may be positioned with respect to the ladder so that it is not located between a first plane that extends through the first side rail and is perpendicular to the lateral direction and a second plane that extends through the second side rail and is perpendicular to the lateral direction.

First claim

What is claimed is:

1. A ladder attachment platform, comprising:
a base for attachment to a ladder, wherein the ladder has a first side rail and a second side rail, and wherein the ladder has a plurality of rungs that extend from the first side rail to the second side rail in a lateral direction;
a user platform for having a user of the ladder attachment platform stand thereon, wherein the user platform is carried by the base, wherein the user platform is positioned with respect to the ladder such that the user platform is not located between a first plane that extends through the first side rail and is perpendicular to the lateral direction and a second plane that extends through the second side rail and is perpendicular to the lateral direction;
a first attachment member that is a clevis fastener that is attached to a first side of the base and that is attachable to a first one of the plurality of rungs of the ladder; and
a second attachment member that is a clevis fastener that is attached to the first side of the base and that is attachable to the first one of the plurality of rungs of the ladder.

2. The ladder attachment platform as set forth in claim 1 , wherein the base is made of a plurality of square tubular members, and wherein the user platform is a solid plate having an anti-skid upper surface.

3. The ladder attachment platform as set forth in claim 1 , further comprising a turnbuckle that is attached to the base and that is attached to a second one of the rungs of the plurality of rungs of the ladder.

4. The ladder attachment platform as set forth in claim 1 , further comprising a handrail assembly that extends vertically above the base and the user platform and that functions to impede a user from exiting the user platform in a direction towards the location of the base where the first plane extends through the base, and wherein the base has a second side that is located opposite from the first side, and wherein the handrail assembly functions to impede a user from exiting the user platform across the second side of the base, wherein the handrail assembly is open to allow a user on the user platform to exit the user platform across the first side of the base and across an end of the base that extends from the first side of the base to the second side of the base.

5. The ladder attachment platform as set forth in claim 1 , wherein the ladder is attached to a rail car.

6. The ladder attachment platform as set forth in claim 3 , further comprising a handrail assembly that extends vertically above the base and the user platform and that functions to impede a user from exiting the user platform in a direction towards the location of the base where the first plane extends through the base, and wherein the base has a second side that is located opposite from the first side, and wherein the handrail assembly functions to impede a user from exiting the user platform across the second side of the base, wherein the handrail assembly is open to allow a user on the user platform to exit the user platform across the first side of the base and across an end of the base that extends from the first side of the base to the second side of the base.

7. A ladder attachment platform, comprising:
a base for attachment to a ladder, wherein the ladder has a first side rail and a second side rail, and wherein the ladder has a plurality of rungs that extend from the first side rail to the second side rail in a lateral direction;
a user platform for having a user of the ladder attachment platform stand thereon, wherein the user platform is carried by the base;
a first attachment member that is attached to the base and that is attachable to a first one of the plurality of rungs of the ladder;
a turnbuckle that is attached to the base and that is attachable to a second one of the rungs of the plurality of rungs of the ladder; and
a second attachment member that is attached to the base and that is attachable to the first one of the plurality of rungs of the ladder;
wherein the first attachment member is a clevis fastener that is attached to a first side of the base and is not movable with respect to the first side of the base, wherein the first one of the plurality of rungs of the ladder is disposed within the opening of the clevis fastener that is the first attachment member; and
wherein the second attachment member is a clevis fastener that is attached to the first side of the base and is not movable with respect to the first side of the base, wherein the first one of the plurality of rungs of the ladder is disposed within the opening of the clevis fastener that is the second attachment member.

8. The ladder attachment platform as set forth in claim 7 , wherein the turnbuckle is attached to the base so as to be capable of pivoting with respect to the base, and wherein the length of the turnbuckle is capable of being adjusted when the turnbuckle is attached to the second one of the rungs of the plurality of rungs of the ladder.

9. The ladder attachment platform as set forth in claim 7 , wherein the ladder is attached to a rail car.

10. The ladder attachment platform as set forth in claim 7 , wherein the base is made of a plurality of square tubular members, and wherein the user platform is a solid plate having an anti-skid upper surface.

11. The ladder attachment platform as set forth in claim 7 , wherein the base has a first side and a second side that is opposite from the first side, and further comprising a handrail assembly that extends vertically above the base and the user platform and that functions to impede a user from exiting the user platform in a direction towards the turnbuckle, and wherein the handrail assembly functions to impede a user from exiting the user platform across the second side of the base, wherein the handrail assembly is open to allow a user on the user platform to exit the user platform across a first side of the base and across an end of the base that extends from the first side of the base to the second side of the base.

12. A ladder attachment platform, comprising:
a rail car having a first side and a second side that are located opposite from and spaced from one another in a width direction, wherein the rail car has an end that extends in the width direction from the first side to the second side;
a ladder attached to the end of the rail car;
a base attached to the ladder;
a user platform for having a user of the ladder attachment platform stand thereon, wherein the user platform is carried by the base and is closer to the first side of the rail car than the second side of the rail car, wherein at least a portion of the user platform is located outboard from the first side of the rail car in the width direction; and
wherein the entire user platform is located completely outboard from the first side of the rail car in the width direction.

13. The ladder attachment platform as set forth in claim 12 , wherein the user platform is a solid plate having an anti-skid upper surface.

14. The ladder attachment platform as set forth in claim 12 , wherein the entire user platform is located in a length direction beyond the end of the rail car such that no portion of the user platform directly faces the first side of the rail car.

15. The ladder attachment platform as set forth in claim 12 , wherein the base has a first side and a second side that is opposite from the first side, wherein the first side of the base is closer to the end of the rail car than the second side of the base; and
further comprising a handrail assembly that extends vertically above the base and the user platform and that functions to

Assignees

• Swygert Richard W
• Lewis Jr William Nelson
• Savannah River Nuclear Solutions Llc

Inventors

• Swygert Richard W
• Lewis Jr William Nelson

Classifications

• E06C5/44

  Other accessories on ladders, e.g. acoustical signalling devices, dismountable switchboards · CPC title

• E06C7/16

  Platforms on, or for use on, ladders, e.g. liftable or lowerable platforms (aspects relating to the lifting B66F) · CPC title

• B61D23/00 Primary

  Construction of steps for railway vehicles (ladders in general E06C) · CPC title