Patent ID: 7097152

Claim:
An automatic support locking device for portable towers and tanks comprising: a. a tank or platform assembly, said tank or platform assembly being slidably mounted onto a frame assembly, said tank or platform assembly having a multiplicity of support legs, said support legs attaching said frame assembly and said tank or platform assembly; b. a first hydraulic cylinder and a second hydraulic cylinder, said first hydraulic cylinder being mounted to a front cross member, said second hydraulic cylinder being mounted to a rear cross member, said front cross member and said rear cross member being integral components of said frame assembly; c. said first hydraulic cylinder being centrally located on said front cross member and said second hydraulic cylinder being centrally located on said rear cross member, said first and said second hydraulic cylinders each having a top and a bottom, said bottom of said first and said second hydraulic cylinders being attached to said front and said rear cross members respectfully, said top of said first and said second hydraulic cylinders each being attached to said tank assemblies; d. a first control lever and a second control lever, said first control lever allowing hydraulic pressure to raise and lower said first hydraulic cylinder, said second control lever allowing hydraulic pressure to raise and lower said second hydraulic cylinder, thereby raising and lowering said tank or platform assembly; e. each of said multiplicity of support legs has an outer cylinder and an inner cylinder, said inner cylinder being free to slide within said outer cylinder, each of said inner cylinders being attached to said frame assembly and each of said outer cylinders being attached to said tank or platform assembly, each of said inner cylinders having a first through slot defined therein, said first through slot being perpendicular to a longitudinal axis of each of said inner cylinders, each of said outer cylinders having a second through slot defined therein, each said second through slot being perpendicular to a longitudinal axis of each of said outer cylinders said second through slots additionally being aligned with each respective first through slot when said tank or platform assembly is raised to said tank or platform assembly's desired position; f. an automatic support locking device assembly, said automatic support locking device assembly comprising a hydraulic actuation means and a locking means; and g. said automatic support locking device assembly being attached to each of said outer cylinders thereon.