GB2172855A - Lifting trolley - Google Patents

Abstract

A mobile lifting trolley for moving heavy objects such as pool or billiards tables comprises a frame 1 with wheels or casters 5 which is dimensioned, or its dimensions are adjusted, so that it can be wheeled under and positioned beneath the object to be lifted. Two cam mechanisms are provided, each comprising two spaced cams 2 which are connected to be moved in unison by a lever 4. The cam mechanisms are spaced from each other on the frame so that, by movement of the levers 4, the cams are operative to raise associated push members 3 and thereby lift the object stably at four spaced contact points. Preferably, the levers rotate the cams to a stop position beyond dead centre so that the weight of the object locks the cams. <IMAGE>

Description

SPECIFICATION Easy move pool trolley This invention relates to an "Easy Move Pool Trol levy".

Background There are numerous types of lifting equipment, mostly comprising of a metal frame with either a hydraulic cylinder or pulleys to give the necessary force for lifting and moving heavy weights. It is very rare to see a piece of equipment with the use of cams and cam followers to give the required lift especially on a commercial product.

Technical Features According to the present invention there is a frame structure of angle, flat and tube steel with four swivel wheels to achieve movement. At each end of the frame there is a handle that operates two cams which then push two cam followers upward to achieve approximately 1 1/4 inch of movement, thus raising the pool table off the ground.

The trolley is designed so that it fits under the pool table but is not fixed in any way to any individual pool table. The trolley can be manufactured to any size depending on the dimensions of the relevant pool table.

Example Ref Figure 1 shows in perspective the "Easy Move Pool Trolley".

1. Shows the main frame assembly.

2. Shows the cam (one of four).

3. Shows one of the cam followers which raises the pool table when cam is rotated.

4. Illustrates the handle at one end of trolley which, when rotated upwards, turns the cams thus achieving the necessary lift to raise the pool trolley off the ground.

5. Shows heavy duty swivel wheels.

1. The "Easy Move Pool Trolley" is designed specifically for the easy lifting and moving of pool tables in public houses and clubs or associations.

The equipment can be rolled underneath the pool table and by operating the handles and thus raising the pool table enable the operator to easily move the pool table into the desired position. This product saves all the hard work of moving pool tables and will prevent damage to both floor and pool table. The equipment can be designed to suit any pool table.

Amendments to the claims have been filed, and have the following effect: (a) The claim above has been deleted or textually amended.

(b) New or textually amended claims have been filed as follows: Claims 1-8 on appended sheet.

1. A lifting trolley comprising a support frame fitted with wheels, casters, or the like for mobility, the frame being, or adjusted to be, of a height that it can pass under and be positioned beneath the object to be moved, two cam mechanisms spaced apart at or near the top of the frame, each cam mechanism comprising a pair of cams which are spaced apart and connected to be moved in unison by a single lever arm and being operable to raise an associated vertically movable push member, the arrangement being such that both cam mecha nisms are operated to raise their respective push members sufficiently to lift and stabilise the object at four spaced contact points clear of the ground.

2. A lifting trolley according to Claim 1, wherein the cams of each cam mechanism are connected by an axle rod and the single arm lever is fixed to said rod, the associated push members being raised by rotation of the rod via the lever, and wherein for lifting, the cams are rotated by the le ver, and wherein for lifting, the cams are rotated by the lever beyond their dead centres so that the weight of the object acts through the push mem bers to lock the cams.

3. A lifting trolley according to Claim 2, for a pool or billiards table, wherein the frame is rectan gular in plan and has four support uprights and four wheels, casters or the like at or near each bot tom corner, and wherein the two cam mechanisms are positioned on opposite sides of the frame, and the two cams of each cam mechanism are spaced at positions towards the other sides of the frame, so as to provide four well spaced contact points for stabilising the table clear of the ground.

4. A lifting trolley according to Claim 3, wherein the support arm for each cam mechanism is ar ranged to extend downwardly when the frame is collapsed whereby lifting is accomplished by mov ing the lever of each mechanism outwards and up wards to rotate the cams, this movement being continued to a stop position in which the cams have been rotated past their dead centres.

5. A lifting trolley according to Claim 2, for an object where the space below it is limited, wherein the cams of each mechanism are rotated by a cranked lever which can be coupled to an end of the axle rod so that it may be operated externally to the object without restriction.

6. A lifting trolley according to any one of the preceding claims, and in which the frame is height adjustable, wherein distance pieces are introduced between the frame and the wheels, casters or the like for height adjustments.

7. A lifting trolley according to Claim 3, or 4, wherein a wheel or caster is mounted on the bot tom end of each support upright, each support up right is telescopic, and means are provided to lock the uprights in a required telescoped position for height adjustment.

8. A lifting trolley constructed, arranged and adapted for use substantially as hereinbefore de scribed with reference to Figure 1 or Figure 2 of the drawings.

**WARNING** end of DESC field may overlap start of CLMS **.

Claims (8)

**WARNING** start of CLMS field may overlap end of DESC **. SPECIFICATION Easy move pool trolley This invention relates to an "Easy Move Pool Trol levy". Background There are numerous types of lifting equipment, mostly comprising of a metal frame with either a hydraulic cylinder or pulleys to give the necessary force for lifting and moving heavy weights. It is very rare to see a piece of equipment with the use of cams and cam followers to give the required lift especially on a commercial product. Technical Features According to the present invention there is a frame structure of angle, flat and tube steel with four swivel wheels to achieve movement. At each end of the frame there is a handle that operates two cams which then push two cam followers upward to achieve approximately 1 1/4 inch of movement, thus raising the pool table off the ground. The trolley is designed so that it fits under the pool table but is not fixed in any way to any individual pool table. The trolley can be manufactured to any size depending on the dimensions of the relevant pool table. Example Ref Figure 1 shows in perspective the "Easy Move Pool Trolley". 1. Shows the main frame assembly. 2. Shows the cam (one of four). 3. Shows one of the cam followers which raises the pool table when cam is rotated. 4. Illustrates the handle at one end of trolley which, when rotated upwards, turns the cams thus achieving the necessary lift to raise the pool trolley off the ground. 5. Shows heavy duty swivel wheels. CLAIMS 1. The "Easy Move Pool Trolley" is designed specifically for the easy lifting and moving of pool tables in public houses and clubs or associations. The equipment can be rolled underneath the pool table and by operating the handles and thus raising the pool table enable the operator to easily move the pool table into the desired position. This product saves all the hard work of moving pool tables and will prevent damage to both floor and pool table. The equipment can be designed to suit any pool table. Amendments to the claims have been filed, and have the following effect: (a) The claim above has been deleted or textually amended. (b) New or textually amended claims have been filed as follows: Claims 1-8 on appended sheet.

1. A lifting trolley comprising a support frame fitted with wheels, casters, or the like for mobility, the frame being, or adjusted to be, of a height that it can pass under and be positioned beneath the object to be moved, two cam mechanisms spaced apart at or near the top of the frame, each cam mechanism comprising a pair of cams which are spaced apart and connected to be moved in unison by a single lever arm and being operable to raise an associated vertically movable push member, the arrangement being such that both cam mecha nisms are operated to raise their respective push members sufficiently to lift and stabilise the object at four spaced contact points clear of the ground.

2. A lifting trolley according to Claim 1, wherein the cams of each cam mechanism are connected by an axle rod and the single arm lever is fixed to said rod, the associated push members being raised by rotation of the rod via the lever, and wherein for lifting, the cams are rotated by the le ver, and wherein for lifting, the cams are rotated by the lever beyond their dead centres so that the weight of the object acts through the push mem bers to lock the cams.

3. A lifting trolley according to Claim 2, for a pool or billiards table, wherein the frame is rectan gular in plan and has four support uprights and four wheels, casters or the like at or near each bot tom corner, and wherein the two cam mechanisms are positioned on opposite sides of the frame, and the two cams of each cam mechanism are spaced at positions towards the other sides of the frame, so as to provide four well spaced contact points for stabilising the table clear of the ground.

4. A lifting trolley according to Claim 3, wherein the support arm for each cam mechanism is ar ranged to extend downwardly when the frame is collapsed whereby lifting is accomplished by mov ing the lever of each mechanism outwards and up wards to rotate the cams, this movement being continued to a stop position in which the cams have been rotated past their dead centres.

5. A lifting trolley according to Claim 2, for an object where the space below it is limited, wherein the cams of each mechanism are rotated by a cranked lever which can be coupled to an end of the axle rod so that it may be operated externally to the object without restriction.

6. A lifting trolley according to any one of the preceding claims, and in which the frame is height adjustable, wherein distance pieces are introduced between the frame and the wheels, casters or the like for height adjustments.

7. A lifting trolley according to Claim 3, or 4, wherein a wheel or caster is mounted on the bot tom end of each support upright, each support up right is telescopic, and means are provided to lock the uprights in a required telescoped position for height adjustment.

8. A lifting trolley constructed, arranged and adapted for use substantially as hereinbefore de scribed with reference to Figure 1 or Figure 2 of the drawings.