Attachment members for a slingbar component of a lift system

Patent metadata

Field	Value
Publication number	US-11833095-B2
Application number	US-202016952727-A
Country	US
Kind code	B2
Filing date	Nov 19, 2020
Priority date	Nov 22, 2019
Publication date	Dec 5, 2023
Grant date	Dec 5, 2023

Abstract

A slingbar includes a sling attachment member and an actuating mechanism. The sling attachment member includes a frame, a portion of which defines an opening, the frame and opening defining an interior of the sling attachment member and a closure element. The actuating mechanism includes a cam and a linkage arranged to be driven by the cam and to operate the closure element in response to motion of the cam thereby causing the closure element to block or expose the opening.

First claim

What is claimed is:

1. A slingbar comprising:
a slingbar arm having an inboard attachment portion and an outboard end, a length being defined between the inboard attachment portion and the outboard end along a lateral direction;
a sling attachment member coupled to the slingbar arm, the sling attachment member comprising:
a frame, a portion of which defines an opening, the frame and the opening defining an interior of the sling attachment member, the frame coupled to the outboard end of the slingbar arm; and
a closure element; and

an actuating mechanism comprising:
a cam positioned at the inboard attachment portion of the slingbar arm and moveable in a direction orthogonal to the lateral direction; and
a linkage arranged to be mechanically driven by the cam and to operate the closure element in response to motion of the cam thereby causing the closure element to block or expose the opening.

2. The slingbar of claim 1 wherein the linkage comprises a bellcrank comprising a follower arm driven by the cam and an output arm connected to the closure element.

3. The slingbar of claim 2 comprising a connector link that connects the output arm to the closure element.

4. The slingbar of claim 1 comprising a cam driver adapted to move the cam.

5. The slingbar of claim 4 wherein the cam driver comprises:
an open position corresponding to the closure element exposing the opening, and a closed position corresponding to the closure element blocking the opening, wherein the cam driver is movable between the open position and the closed position in response to weight applied to the slingbar.

6. The slingbar of claim 5 wherein the cam driver is biased to the open position and is movable toward the closed position in response to an increase in the weight applied to the slingbar.

7. The slingbar of claim 5 wherein the cam driver comprises an attachment lug for attaching the slingbar to a host.

8. The slingbar of claim 4 , wherein the closure member slides in a lateral direction between the open and closed position.

9. The slingbar of claim 4 , wherein the cam defines an cam slot inclined relative to the lateral direction, and the linkage is slidingly coupled to the cam within the cam slot.

Assignees

• Liko Res & Dev Ab

Inventors

• Dole Andrew
• Hildenbrand Chris

Classifications

• A61G7/1078 Primary

  Clamps for flexible harnesses · CPC title

• A61G7/1015

  Cables, chains or cords · CPC title

• A61G7/1051

  Flexible harnesses or slings · CPC title

• A61G7/1069

  for quick release · CPC title

• A61G7/1061

  Yokes · CPC title