Abstract: A multipurpose support platform system is disclosed including a variety of configurable components. In some aspects a frame is made from readily available standard materials such as construction lumber and sheet material connected by hardware support units that include metal plates securely joined in a configuration supporting the frame and sheet materials of the platform. Horizontal and vertical wall configurations are permitted, and the overall structure then allows for a secure and protective work surface for a variety of activities.

Abstract: A multipurpose support platform system is disclosed including a variety of configurable components. In some aspects a frame is made from readily available standard materials such as construction lumber and sheet material connected by hardware support units that include metal plates securely joined in a configuration supporting the frame and sheet materials of the platform. Horizontal and vertical wall configurations are permitted, and the overall structure then allows for a secure and protective work surface for a variety of activities.

Abstract: A stored energy coupling and pipe bursting apparatus which is designed to increase the efficiency of pipe-bursting by enhancing the effect of a pneumatic or hydraulic hammer used while moving the pipe-bursting head. In one embodiment the stored energy coupling has one or more internal springs and operates to improve the energy output of a hammer as the pipe-bursting head traverses the length of the pipe to be broken responsive to the pulling action of a single hydraulic cylinder having dual rod or cable gripping elements. In another embodiment the stored energy coupling has no spring and is designed to prevent damage to the static pulling device when the hammer is implemented. The stored energy coupling of this invention can be installed in front or behind the bursting head, or even in the bursting head and is always positioned in front of the hammer.