Patent ID: 8192126

Claim:
A mobile hoist system, comprising: a frame removably connected to a support structure; a drive assembly connected to said frame; wherein said drive assembly includes a winch and a brake unit, wherein said brake unit is connected to said winch; wherein said brake unit is capable of preventing lowering of a load up to a first torque limit; a driven assembly connected to said frame, wherein said driven assembly is mechanically connected to said drive assembly; wherein said driven assembly includes a drum having a strap wound thereon and a slip clutch to brake said drum; wherein said slip clutch prevents slippage up to a second torque limit, wherein said second torque limit is less than said first torque limit to prevent damage to said brake unit by said load having an excessive weight; wherein said slip clutch is comprised of a pair of friction members on opposing sides of said drum and a pair of plates positioned on opposite sides of said pair of friction members; and a main elongated member connected between said drive assembly and said driven assembly.