Articulating cage

• US 8,561,239 B2
• Filed: 08/17/2011
• Issued: 10/22/2013
• Est. Priority Date: 08/17/2010
• Status: Active Grant

• Current Assignee: Safe Rack LLC
• Original Assignee: Safe Rack LLC
• Inventors: Honeycutt, Robert W., Harmon, Charles F., Daniel, James P.
• Primary Examiner(s): Addie, Raymond W
• Application Number:
  US13/212,163
• Publication Number:
  US 20120204362A1
• Time in Patent Office: 797 Days
• Field of Search: 14 36- 41, 14/695, 14 711- 725, 182/84, 182/130, 182/131
• US Class Current: 14/71.3
• CPC Class Codes: B60R 3/02 Retractable steps or ladders, e.g. movable under shock B60R3/005 takes precedence
• CPC Class Codes: E01D 15/24 Bridges or similar structures, based on land or on a fixed structure and designed to give access to ships or other floating structures arrangement of ship-based ramps B63B27/14; loading ramps B65G69/28
• CPC Class Codes: E01D 19/106 Movable inspection or maintenance platforms, e.g. travelling scaffolding or vehicles specially designed to provide access to the undersides of bridges lifting devices for movable platforms on vehicles in general B66F11/04
• CPC Class Codes: E06C 5/02 with rigid longitudinal members
• CPC Class Codes: E06C 7/16 Platforms on, or for use on, ladders, e.g. liftable or lowerable platforms aspects relating to the lifting B66F
• CPC Class Codes: E06C 7/181 Additional gripping devices, e.g. handrails

Abstract

An articulating cage configured to raise and lower with respect to a fixed structure. The articulating cage comprises support structures affixed to the fixed structure and that include one or more springs. The articulating cage includes lifting arms that are pivotally connected to the support structures at one end and to a cage portion at the other end. A load chain connects to the springs at one end and to the lifting arm at the other near to the location where the lifting arm connects to the cage portion.

Claims

1. An apparatus configured to raise and lower an articulating cage with respect to a fixed structure, the apparatus comprising:

a pair of support structures configured to be affixed to the fixed structure, wherein at least one of the pair of support structures comprises a spring;

first and second lifting arm arrangements, each of said lifting arm arrangements comprising upper and lower lifting arms having;

a first end pivotally connected to a respective one of the pair of support structures such that said upper and lower lifting arms of said first lifting arm arrangement are pivotally connected to a first support structure of said pair of support structures and said upper and lower lifting arms of said second lifting arm arrangement are pivotally connected to a second support structure of said pair of support structures; and

a second end pivotally connected to the articulating cage so as to allow the second end of the upper and lower lifting arms to pivot relative to a floor of the articulating cage;

a load device connected to the spring at one end and proximate to the second end of the first lifting arm arrangement at the other end; and

a hoist operatively connected to the load device to cause movement of the load device in order to raise and lower said articulating cage.

2. The apparatus of claim 1, wherein the second ends of the lower lifting arms of the first and second lifting arrangements are indirectly connected to the floor of the articulating cage so that the second ends are directly connected to a support member that is connected to the floor.

3. The apparatus of claim 1, wherein operation of the hoist causes the articulating cage to be selectively disposed in first position and a second position each of which is in a plane that is perpendicular to the pair of support structures, wherein the first and second positions are displaced from each other.

4. The apparatus of claim 3, wherein the first position is such that the first and second lifting arm arrangements are disposed perpendicular to the pair of support structures, and wherein the second position is such that the first and second lifting arm arrangements are disposed at an angle less than 90 degrees relative to the pair of support structures.

5. The apparatus of claim 1, wherein the articulating cage comprises railings connected to be fixed with respect to the floor.

6. The apparatus of claim 5, wherein said second end of said upper and lower lifting arms is pivotally connected to the railings.

7. The apparatus of claim 1, wherein the first end of said upper and lower lifting arms is adjustably connected to the pair of support structures such that the position of the first end of the upper and lower lifting arms is adjustable on the pair of support structures.

8. The apparatus of claim 1, wherein the load device comprises a load chain.

9. The apparatus of claim 1, wherein the floor of the articulating cage is configured to support a person standing thereon.

10. A method to raise and lower an articulating cage with respect to a fixed structure, the method comprising:

providing an apparatus comprising;

a support structure configured to be affixed to the fixed structure;

a lifting arm arrangement comprising upper and lower lifting arms having;

a first end pivotally connected to the support structure; and

a second end pivotally connected to the articulating cage so as to allow the second end of the upper and lower lifting arms to pivot relative to a floor of the articulating cage, wherein the floor of the articulating cage is configured to support an object resting thereon;

a load device connected proximate to the second end of the lifting arm arrangement such that movement of the load device causes movement of the articulating cage; and

pulling the load device so that the upper and lower lifting arms are pivoted relative to the support structure at said first end thereof and are pivoted relative to the floor of the articulating cage at said second end thereof such that the floor remains horizontal as the articulating cage is raised and lowered.

11. A system for moving an articulating cage relative to a fixed structure, the system comprising:

an upright support configured to be affixed to the fixed structure;

a lifting arm arrangement having a first end and a second end, said first end pivotally connected to the upright support at upper and lower connection locations; and

said second end of said lifting arm arrangement pivotally connected to the articulating cage at upper and lower connection locations so as to allow the second end of said lifting arm arrangement to pivot relative to a floor of the articulating cage, wherein the floor of the articulating cage is configured to support an object resting thereon, thereby allowing the articulating cage to be lifted or lowered along an arc but allowing the floor of the articulating cage to remain horizontal;

a load device connected proximate to the second end of the first lifting arm arrangement, the load device configured to support the articulating cage such that movement of the load device causes movement of the articulating cage; and

a hoist operatively connected to the load device to cause movement of the load device in order to raise and lower said articulating cage.

12. The system of claim 11, wherein said lifting arm arrangement comprises upper and lower lifting arms arranged parallel to one another.

13. The system of claim 11, further comprising:

a second upright support configured to be affixed to said fixed structure; and

a second lifting arm arrangement pivotally connected at a first end to said second upright support and at a second end to the articulating cage.

14. The system of claim 11, wherein the first end of the lifting arm arrangement is adjustably connected to the upright support such that the position of the first end of the lifting arm arrangement is adjustable on the upright support.

15. The system of claim 11, wherein the load device comprises a load chain.

16. The system of claim 15, wherein the hoist comprises a wheel rotatably mounted proximate a top end of said upright support.

17. The system of claim 16, wherein the hoist comprises a pull chain operatively connected to said wheel.

18. The system of claim 16, wherein an opposite end of the load chain is connected to at least one spring.

19. The system of claim 18, wherein the at least one spring is fixedly connected to the upright support.

20. The system of claim 19, wherein the at least one spring is at least partially enclosed by the upright support.