US 12,180,727 B2 · Crack-filling joint pump applicable to polished concrete floors

Abstract

Lightweight, battery-operated, walk-behind joint- and crack-filling equipment has no belts or chains to wear out, and no inverters or other electrical power-conversion apparatus. A single brushless battery-operated DC motor, directly coupled to two pumps, simultaneously delivers the resin and hardener to a wand, such that a single user can push the cart and apply the mixture. The portable cart includes a frame with a handle and single set of right and left wheels accommodates two containers holding the hardening components. The containers may be pails or buckets or bag-in-box containers that may be compressed and collapsed after use to reduce waste requirements. The boxes and/or bags may also be biodegradable for a more environmentally friendly solution.

Claims16

Dependent claims

A walk-behind machine for dispensing a two-part hardening material, comprising:

a frame with a handle and a single set of right and left wheels;
wherein the frame accommodates two containers holding first and second parts of a hardening mixture;
at least one battery supported on the frame;
an electric motor supported on the frame and powered by the at least one battery;
wherein the motor is coupled to a gearbox operative to simultaneously drive outwardly extending opposing axles;
each axle being coupled to a respective pump, each pump having an inlet and an outlet, and wherein the inlets to the pumps are adapted for coupling to the respective containers supported by the frame, and the outlets of the pumps are adapted for coupling to a dispensing wand through separate lengths of flexible tubing, wherein the separate lengths of flexible tubing each extend from the outlet of the respective pump to the dispensing wand;
and
wherein the machine has no belts, chains, or electrical power-conversion apparatus.

5 more elements

Dependencies are inferred from the claim text.

Crack-filling joint pump applicable to polished concrete floors

Life of this patent

Crack-filling joint pump applicable to polished concrete floors

Life of this patent

Abstract

Claims16