Fall Arrest Block
AssigneeCheckmate Limited
InventorsOliver Auston, Duncan Barrier
Life of this patent
Estimating the term…
Abstract
A fall arrest block has a drum (40) on which a lifeline is wound and from which the line can be drawn off or drawn back on, as the work man moves towards and away from the block. One end of the lifeline is permanently secured to the drum, and the drum has sockets (50) for securing ends of more than one different type of lifeline. The block also has a brake (24) in the form of a sealed unit which can be removed and replaced with a fresh unit, when servicing of the brake is required.
Claims18
A drum for use in a fall arrest block, the drum comprising a core and flanges on either side of the core, wherein the core and one of the flanges are formed as a plastics moulding, and the core has separate anchorage points for more than one type of lifeline.
A drum as claimed in any preceding claim, wherein the core and said one of the flanges are formed as a single plastics moulding.
A drum as claimed in any preceding claim, wherein the other of the flanges is in the form of a disc, and the core and the other flange may have interengaging formations which prevent relative rotation between the flange and the core.
A fall arrest block with a drum as claimed in any preceding claim, wherein a spring is provided to rewind the lifeline onto the drum, the core and said one of the flanges are formed as a single plastics moulding and the moulding incorporates a housing for the spring on the side of said one of the flanges which faces away from the core.
A brake unit for use in a fall arrest block, the unit comprising a first part which is adapted to be secured to a chassis of the block, a second part which can be locked to the drum when a fall is to be arrested, and friction surfaces within the unit which allow rotation between the first and second parts against the friction generated by the friction surfaces, characterised in that the brake unit is a sealed unit.
A drum for a fall arrest block substantially as herein described with reference to FIGS. 4 to 7 of the accompanying drawings.
A brake unit for a fall arrest block substantially as herein described with reference to FIGS. 8 and 9 of the accompanying drawings.
A fall arrest block substantially as herein described with reference to the accompanying drawings.
Dependencies are inferred from the claim text.