Vertical lift gate assembly

A vertical lift gate assembly comprising:

• a pair of elongate tubular members vertically erected and spaced apart from one another;
• the pair of rail members each of which extends along the length of and is securely fastened to a respective one of said elongate tubular members;
• a gate member disposed between said elongate tubular members and movably mounted upon said rail members;
• and
• a means for raising and lowering said gate member which includes a pair of pulleys each of which is mounted to a respective one of said elongate tubular members and a pair of flexible lines carried by said pulleys for raising and lowering said gate member, said means for raising and lowering said gate member also including a counterweight member vertically movable inside one of said elongate tubular members and connected to said flexible lines to aid lifting of said gate member and to provide tension to said flexible lines, said counterweight member being a pneumatic cylinder which is adapted to receive compressed air thus effecting the lifting and lowering of said gate member, said pneumatic cylinder being supported by a pair of pulleys which carries said flexible lines in such a way that said gate member moves twice the distance of said pneumatic cylinder.

A vertical lift gate assembly comprising:

• A pair of elongate tubular members vertically erected and spaced apart from one another;
• the pair of rail members each of which extends along length of and is securely fastened to a respective one of said elongate tubular members;
• a gate member disposed between said elongate tubular members and movably mounted upon said rail members;
• and
• a means for raising and lowering said gate member which includes a pair of pulleys each of which is mounted to a respective one of said elongate tubular members and a pair of flexible lines carried by said pulleys for raising and lowering said gate member, said means for raising and lowering said gate member comprising a speed reduced motor having a rotatable shaft, a pulley attached to said rotatable shaft for rotation therewith and having said flexible lines attached thereto, and a switch means to energize said motor which rotates said pulley on said shaft either to take up said flexible lines which lifts said gate member or to let out said flexible lines which lowers said gate member.