Patent ID: 7100896

Claim:
A jack for use in shipping container handling systems wherein the container includes corner lock castings at each corner thereof, the jack including; a vertical standard supported by a base, an upper guide sleeve slidingly mounted to said standard and movable with respect to an upper portion of said standard and a lower guide sleeve slidingly mounted to a lower portion of said standard so as to be retained in spaced relationship from said upper guide sleeve, connector means for connecting said upper guide sleeve to said lower guide sleeve, a drive means mounted within said standard and connected to a drive power source, said drive means being operable to move said upper guide sleeve relative to said standard and simultaneously move said lower guide sleeve relative to said standard by way of said connector means, first attachment means carried by said upper guide sleeve for selectively engaging an upper corner lock casting of a container and a second attachment means carried by said lower guide sleeve for selectively engaging a spaced lower corner lock casting of the container, and said connector means including an arm member having an upper end pivotally connected to said upper guide sleeve and a lower end pivotally connected to said second attachment means.