Patent ID: 7708116

Claim:
A fall arrester which forms part of a fall protection system for ladders and similar climbing routes and is adapted to be inserted into a guide rail with a C-profile, the guide rail defining a longitudinal plane, the fall arrester comprising: a body defining a front end and a rear end of the fall arrester and at least a first and a second pair of rolls which are arranged on the body and are adapted to run inside the guide rail, the first and second pair of rolls having a first and second axis of rotation respectively; wherein the first pair of rolls is arranged rigid against the body; wherein the second pair of rolls is arranged swivellable about a swivel axis which runs at a right angle to the longitudinal plane of the guide rail whereby the second pair of rolls is adapted to be swivelled within a second plane parallel to the longitudinal plane defined by the guide rail, the second pair of rolls then capable of being located in an inserting position, and then capable of being swivelled within the longitudinal plane defined by the guide rail, where the second pair of rolls then being positioned in a securing position; wherein the second pair of rolls is adapted to be fixed in the securing position; wherein the second pair of rolls is directly attached to a shank housed rotatably in the body, the upper end of the shank projects from the body and has an indent; wherein a suspended ratchet is articulated to the body and is adapted to be inserted into the indent; wherein two longitudinal grooves are milled on opposite sides in the shank of the second pair of rolls; wherein a first longitudinal bore leads from a second bore in which the shank of the second pair of rolls is housed to the rear end of the fall arrester; and wherein in the first longitudinal bore a cylindrical pin loosely slides and the pin is adapted to drop under the action of gravity into one of the longitudinal grooves of the shank, thereby able to lock the shank against rotation in the event of the fall arrester being inserted incorrectly.