US 11,655,677 B2
Fall arrest system
David Perrin, Dalmeny (CA); Matthias Rossen, Warman (CA); Brad Frehlich, Saskatoon (CA); Douglas Purdy, Meacham (CA); Dayna Gatin, Saskatoon (CA); and David Lund, Saskatoon (CA)
Assigned to NORTHERN STRANDS CO. LTD., Saskatoon (CA)
Appl. No. 16/755,761
Filed by NORTHERN STRANDS CO. LTD., Saskatoon (CA)
PCT Filed Jul. 6, 2018, PCT No. PCT/CA2018/050827
§ 371(c)(1), (2) Date Apr. 13, 2020,
PCT Pub. No. WO2019/071337, PCT Pub. Date Apr. 18, 2019.
Claims priority of provisional application 62/572,128, filed on Oct. 13, 2017.
Prior Publication US 2020/0277821 A1, Sep. 3, 2020
Int. Cl. E06C 7/18 (2006.01); A01F 25/16 (2006.01); E04H 7/24 (2006.01)
CPC E06C 7/186 (2013.01) [A01F 25/163 (2013.01); E04H 7/24 (2013.01)] 21 Claims
OG exemplary drawing
 
1. A fall prevention system for a ladder having a vertical wall portion and a nonvertical roof portion with respect to a ground surface, the nonvertical roof portion transitioning from the vertical wall portion and extending along a conical roof, comprising:
an anchor plate coupled to the conical roof;
a rope coupled at one end to the anchor plate;
a fastener coupling another end of the rope directly contacting at least one rung along the vertical wall portion of the ladder; and
a rope grab slidably coupled to the rope between the anchor plate and the fastener; the rope grab automatically secured to the rope at all times until manually adjusted by user intervention.