GB2315059A - Lifting Jack - Google Patents

Abstract

A jack for lifting e.g. plasterboard comprises two manually operated telescopic jacks joined by a cross bar (6, Fig 2). The jacks and cross bar are frictionally locked in place and released by a handle. Preferably, the cross-bar carries a working platform e.g. of scaffolding boards. Preferably, the jacks are mounted on castors and their distance apart is adjustable.

Description

LIFTING JACK This invention relates to a Board Lifting device.

Fixing boards overhead is an awkward procedure for one or two people. This invention allows a single operator to fix boards easily, in less time and more accurately. The system comprises of two jacking devices and an interconnecting cross bar.

The.jacking device comprises of two plates; one locking plate and one jacking plate assisted by springs.

A specific embodiment of the invention will now be described by way of example with reference to Figures 1, 2 & 3.

Figures 1 shows a front view of the jacking system.

Figure 2 shows a side view Figure 3 shows a general perspective view of the system in use.

Referring to the drawing, the lifting jack comprises a Main Frame 1 fflg2); a T-Bar 2 (fig 1); a Jacking Unit 3 (fig 2); a Platform 4 (fig I)a Jacking Arm 5 (fig 2) and a Cross Bar 6 (fig 2).

A general perspective arrangement is provided (fig 3).

The cross bar 6 is inserted into the platform supports 4, until past locking button on either end of cross bar (the distance apart of the lifting units is adjustable to fit the length of the board). The steps supports 4 are a sliding unit on which are placed suitable platforms to work off. The castors on the base of the Main Frames 1 should be locked to hold the device in position. A board is placed on the T-Bar 2, and using both jacking arms 5, the board is raised to the desired position. Once fixed, the units can be lowered by holding the T-Bar 2 and releasing locking plate and lowering manually.

Claims (14)

1. A fifting jacking system, which comprises two jacking devices and an interconnecting cross bar.

2. A lifting jacking system as in Claim 1 that is automatically secured by a frictional mechanism.

3. A lifting jacking system as in Claim 1 or Claim 2 that is operated using a handle.

4. A lifting jacking system as in Claim 3 wherein lowering is achieved by a quick release frictional device.

5. A lifting jacking system as in Claim 4 wherein an adjustable working platform is provided.

6. A fifting jacking system as in Claim 5 wherein the working platform is automatically secured by a frictional device.

7. A lifting jacking system as in Claim 6 wherein the working platform is adjusted manually by a quick release fictional device.

8. A lifting jacking system as in Claim 7 wherein castor wheels are provided to assist mobility to the unit.

9. A fifting jacking system as in Claim 8 wherein the distance apart of the two upright jacking devices is adjustable.

10. A lifting jacking system as in Claim 9 wherein the distance apart of said upright jacking devices is controlled by a cross bar below the working platform.

11. A lifting jacking system as in Claim 9 and Claim 10 wherein the said cross bar is located on the upright jacking devices by springs clips.

12. A lifting jacking system as in Claim 11 wherein said assembly provides that the handles to operate the respective jacking mechanisms are inward facing for single operator use.

13. A lifting jacking system as in Claim 12 wherein by pulling said handles in a downward direction the T-Bars are caused to rise.

14. A lifting jacking system is substantially as described herein with reference to Figures 1, 2 and 3, of the accompanying drawing.