Manbasket testing apparatus and method

• US 4,884,454 A
• Filed: 11/14/1988
• Issued: 12/05/1989
• Est. Priority Date: 11/14/1988
• Status: Expired due to Term

• Current Assignee: Lifting Technologies, Inc.
• Original Assignee: Lifting Technologies, Inc.
• Inventors: Johnson, Roy L.
• Primary Examiner(s): Myracle, Jerry W.
• Application Number:
  US07/270,207
• Time in Patent Office: 386 Days
• Field of Search: 73/788, 73/865.6, 73/865.9, 73/789, 73/849, 182/63
• US Class Current: 73/788
• CPC Class Codes: G01N 2203/0033 Weight
• CPC Class Codes: G01N 3/14 generated by dead weight, e.g. pendulum; generated by springs tension G01N3/18 takes precedence

Abstract

A manbasket testing apparatus for use in the trial lift and proof testing of personnel work platforms known as manbaskets is disclosed. The testing device provides a manbasket supported by a floor attached sling and providing a removable test weight attached through and underneath the floor of the manbasket by the use of eyebolts attached to the test weight and extending through the floor with attachment rods slid transversely through the eyebolts. A method of testing using the manbasket testing apparatus is also disclosed.

Claims

1. A manbasket testing apparatus comprising:

a manbasket having a floor;

sling means for suspending the manbasket from a crane, said sling means attached to the manbasket; and

weight means removably attached to and positioned underneath the floor of the manbasket wherein said weight means is comprised of a fixed weight having an upper surface and wherein the upper surface of said weight provides attachment means for removably attaching said weight to said manbasket.

2. The manbasket testing apparatus as described in claim 1 wherein said fixed weight further comprises a weight base means attached to said weight and beneath said weight upon which said weigh rests.

3. The manbasket testing apparatus as described in claim 2 wherein said weight attachment means is comprised of eyebolts affixed to said fixed weight upper surface.

4. The manbasket testing apparatus as described in claim 3 further comprising an attachment rod having a first end and a second end, said rod insertably positioned within at least two of said eyebolts.

5. The manbasket testing apparatus as described in claim 4 further comprising a locking pin attached to said first end of said attachment rod.

6. The manbasket testing apparatus as described in claim 4 further comprising a handle attached to said second end of said rod.

7. The manbasket testing apparatus as described in claim 1 wherein said sling means is attached to said floor of said basket.

8. The manbasket testing apparatus as described in claim 7 further comprising a cable fairlead attached to said manbasket and through which said sling means passes.

9. The manbasket testing apparatus as described in claim 8 wherein said basket is provided with handrail means and wherein said fairlead is attached to said handrail means.

10. The manbasket testing apparatus as described in claim 9 further comprising smooth cable routing elbows attached to said fairleads.

11. The manbasket testing apparatus as described in claim 10 wherein said sling is comprised of four cables each of said cables attached to said floor of said manbasket and to said master link.

12. The manbasket testing apparatus as described in claim 11 wherein two of said four cables comprise a manbasket sling set.

13. The method of testing a manbasket comprising the steps of:

providing a manbasket having a floor, a sling means attached to said basket and a weight means removably attached underneath and to said floor wherein said weight means is comprised of a fixed weight having an upper surface and wherein the upper surface of said weight provides attachment means for removably attaching said weight to said manbasket;

attaching said weight means to said manbasket;

raising said manbasket and suspending it for a period of time;

lowering said manbasket testing device; and

removing said weight means.