Complete specification step trolley system

Abstract

A step trolley system assisting machine grinding of concrete step vertical faces with grinder. Disclosed inventive device includes trolley bases 1 and 2 made of aluminium, a knob between bases adjusting tilt of attached grinder 8, manufactured to hold 125mm grinder positioned vertically onto trolley at front working end of trolley using aluminium clamp 5 and grinder clamp rail mount 15. Lower grinder clamp 5 made of aluminium and attaches to trolley base 1 designed to securely support 125mm grinder upright in place. Grinder clamp 5 can be removed by loosening fasteners to replace the grinder when required. Trolley has an adjustable slide rail 3 attached to manoeuvre grinder up and down to 270mm depth and rotate with pivot mount 16 and slewing block 18 left to right at 45-degree angle when locking pins 17 released. Vacuum guard 7 and pipe allows dust extraction when attached to vacuum.

Description

[0001] STEP TROLLEY SYSTEM

[0002] BACKGROUND OF THE INVENTION

[0003] (0001) Currently a vertical trolley system can grind a vertical concrete edge to a depth of 100mm only. This invention has been specially devised to provide an improved grinding system that grinds to a greater depth of 270mm and capable of rotating to grind comers which will assist the operator to grind a step face quickly and easily.

[0004] (0002) At present the operator is required to hold by hand a wet grinder to machine grind the vertical face on concrete steps.

[0005] (0003) The current method to grind the concrete step face is time consuming and causes fatigue on the operators arms due to holding the grinder in differing positions for long lengths of time to achieve a grinded edge on the concrete step face.

[0006] SUMMARY OF INVENTION

[0007] (0004) This invention has been specially devised to eliminate these identified issues whilst machine grinding a concrete step face to a depth of 270mm.

[0008] (0005) The step trolley system is a trolley designed to securely hold a 125mm wet grinder in position so the attached grinder can be rolled effortlessly along the edge of the concrete step landing and the connected cup wheel on grinder can grind the entire step face with the operator sliding the step trolley systems slide rail support knob up and down to a depth of 270mm and rotating it from left to right at 45-degree angles in a fraction of the time with less fatigue on the operator and in a safer working manner.

[0009] (0006) This step trolley system has been designed for grinding concrete step faces, small concrete walls, and vertical overhangs on walls. The step trolley system is designed to hold a 125mm variable speed wet grinding with RCD.

[0010] (0007) The step trolley system is made of aluminium, steel, plastic and poly plastic parts however other materials could possibly be used such as the use of more steel components and plastic also as well as a longer sliding rail to achieve a depth greater than 270mm.

[0011] BRIEF DESCRIPTION OF DRAWINGS

[0012] (0008) The step trolley system can be better understood with reference to the illustrations of the invention APPENDIX 1-A:

[0013] Figure 1 is front view of the step trolley system.

[0014] Figure 2 is the back view of the step trolley system

[0015] DESCRIPTION OF EMBODIMENTS

[0016] (0009) Figures 1 - 2 of the drawings illustrate the step trolley system's front base 1, the back base 2, adjustable slide rail 3, the slide rail support knob 4 made of poly plastic, the grinder clamp 5 made of aluminium, grinder bracket knob 6 made of plastic. Vacuum guard 7 is made of carbon and houses a suction / vacuum pipe 11 for the option of dry grinding, water tap and vacuum pipe bracket 10 made of carbon, tilt adjustment knob 8 located between front and back bases is made of plastic and steel, a rear handle adjustment screw 9 is located at rear of back base, adjustable handle post made of steel and knob made of plastic 12, castor wheels 13 located either side of front and back base, linear bearing block 14 made of stainless steel, grinder clamp rail mount 15 made of aluminium, slewing block 18 made of aluminium, pivot pin mount 16 made of aluminium, locking pin 17 also made of aluminium. INDUSTRIAL APPLICABILITY

[0017] (0010) The step trolley system has been invented for the concrete construction industry to assist the operator with grinding of concrete step vertical faces with the use of an attached wet grinder. The step trolley system is rolled along the concretes surface edge whilst the sliding mechanism lowers the attached wet grinder with grinding cup to grind the step face vertical face to a smooth even finish. A locking pin is released to allow the operator to move the attached grinder to a 45-degree angle to grind corners on the step vertical face also. The wet grinder requires mains power and a standard water hose connected to the water hose component on grinder to operate.

[0018] (0011) The step trolley system has been invented for wet grinding (non-suction) of step vertical faces, but an option is included with the step trolley system for dry grinding with the inclusion of a suction / vacuum pipe outlet attachment. A vacuum bag or vacuum hose not included would be required with the dry grinding option.

[0019] (0012) With respect to the above description then, it is to be realized that numerous modifications and changes will readily occur to those skilled in the art, it is not desired to limit the invention to the exact construction and operation shown and described, and accordingly all suitable modifications and equivalents may be resorted to falling within the scope of the invention.

Claims

CLAIMSThe claims defining the invention are as follows:

1. A step trolley system for a hand-held grinder comprising: a front and back base with adjustable tilt knob, spaced castor wheels adapted, in use, to support the trolley upon a surface; a pivot mount with adjustable locking pin attached to front base and a slewing block connected to a linear bearing block, so in use, grinder can be rotated up to a 45-degree angle left or right; a slide rail attached to linear bearing block to manoeuvre grinder up and down to a depth of 270mm upon a vertical concrete surface; at least one arm, being a grinder clamp spacer and grinder bracket knob, projecting from the front base supporting grinder clamp means adapted, in use, to mount a hand-held grinder to the trolley such that a grinding cup mounted to the hand-held grinder lies in a plane perpendicular to the surface; a grinder clamp rail mount fitted vertically where grinder clamp spacer is attached and a slide rail and linear clamp block with adjustable knob is also attached to manoeuvre grinder up and down; a adjustable handle projection from the back base distally from the castor wheels by adjusting screw at rear of back base;a clamp to hold wet grinder in place on trolley; a locking pin to hold grinder in position or released activating the slewing block allowing wet grinder to be rotated at a left or right angle on a concrete vertical face; a tilt adjustment knob between both base plates to adjust the vertex vertical angles of the grinder against the concrete surface; a guard mounted to either or both the base and grinder clamp rail mount, the guard having an aperture adapted so that in use an arbour of the grinder projects through the guard; and, wherein during use the trolley may be rolled across the surface with the grinding disc working upon an edge of the step vertical surface.

2. The trolley as in statement 1 including a vacuum pipe communicating, during use, with the vicinity of the grinding cup.

3. The trolley as in statement 1 and 2 including a cord retaining means adapted in use for securing a power cord of the hand-held grinder to trolley.

4. The trolley as in statements 1 to 3 wherein the handle core includes a post projecting from the base, the grinding bracket, and a hand grip on handle core.

5. The trolley as in statement 1 to 4 wherein the slide rail mechanism on trolley manoeuvres grinder up and down on concrete face surface.

6. The trolley as in statement 1 to 6 including the post and hand grip wherein the hand grip is attached to the slide rail be adjustable means adapted to allow the space between base and hand grip to be altered.

7. The trolley as in statement 1 to 5 wherein locking pin when released allows grinder to be rotated to a 45-degree left and right angle.

8. The trolley as in statement 1 to 6 wherein a tilt adjustment knob located between both base plates used to adjust angle of grinder against concrete surface.

9. The trolley as in any one of statements 1 to 7 wherein the aperture is a circular hole.

10. The trolley as in statements 1 - 8 wherein the guard includes wings designed to shield the grinding cup wheel in use.

11. The trolley as in statements 1 - 9 wherein castor wheels move step trolley system from side to side on concrete surface whilst grinder is in use.

12. The trolley as in statement 1 - 1 wherein clamp can be removed to allow removal and replacement of grinder.

13. The trolley as in statement 6 wherein the adjustable means includes a bore through the handle post, a rod passing through the post and a clamp adapted to releasably clamp the rod within the bore.

14. The trolley as in any one of statements 1 to 13 being manufacture of materials including any one of more of aluminium, carbon, rubber, plastic and stainless steel.

Images