3m Innovative Properties Company

D B Industries, Inc.

Andrew C Strauss

Michael T Weiss

Nicholas G Bauer

Greg E Schrank

Nathan C Meyer

Joshua A Rodewald

A fall protection system includes a mast assembly including a fixed mast section, a movable mast section, and a winch assembly. The fall protection system further includes a locking mechanism adapted to lock the movable mast section relative to the fixed mast section. The locking mechanism includes a locking pawl connected to the winch assembly. The locking pawl is adapted to rotate between an engaged position and a disengaged position. The locking pawl engages with the fixed mast section in the engaged position to prevent relative movement between the fixed mast section and the movable mast section. The locking mechanism also includes at least one spring adapted to bias the locking pawl towards the engaged position. Further, the winch assembly is adapted to retain the locking pawl in the disengaged position against the biasing of the at least one spring based on a tension selectively applied by the winch assembly.

Fall protection system

A fall protection system includes a base plate defining a first side and a second side defined opposite to the first side. The fall protection system also includes a mast assembly connected to the base plate proximate to the first side of the base plate. The fall protection system further includes a jib inclined with respect to the mast assembly and pivotably connected to the mast assembly. The fall protection system includes a counterweight connectable to the base plate proximate to the second side of the base plate.

A fall protection system includes a base assembly, a mast assembly, and a locking assembly adapted to lock the mast assembly with the base assembly. The locking assembly includes a first plate and a second plate. The locking assembly also includes a fixed member fixedly coupled to the second plate. The locking assembly further includes a locking pin including an elongate portion at least partially received within the fixed member and a first tab, the locking pin being movable relative to the fixed member between an engaged position and a disengaged position. In the engaged position, the first tab is at least partially received within a first groove such that the locking pin is engaged with the first plate. Further, in the disengaged position, the first tab is at least partially received within a second groove such that the locking pin is spaced apart from the first plate.

A confined-space davit, including a vertical, elongate mast provided by at least one annular tube; and, a boom that is pivotally connected to an upper end portion of the mast and that extends forwardly from the mast. The tube comprises a forward wall and an opposing rearward wall and comprises left and right opposing lateral sidewalls that each connect the forward wall to the rearward wall.

Confined-space davit

An assembly comprises an arm, a first connector, a second connector, an elongate member, and a shock absorber. The arm has a first arm end, a second arm end, a bore extending longitudinally through the arm, and an opening proximate the second arm end providing access to the bore. The first connector is connected to the arm proximate the first arm end, and the second connector is connected to the arm proximate the second arm end. The elongate member has an intermediate portion interconnecting a first connecting end and a second connecting end. The first connecting end is connected to the second connector, the intermediate portion extends toward the first arm end and back toward the second arm end, and the second connecting end extends through the opening. The shock absorber has a first portion connected to the first connector and a second portion connected to the intermediate portion.

Growing community of inventors

Goodhue, MN, United States of America

Andrew C Strauss