Next Previous

Type 2 Lever Cam Ascenders

In elementary school science we all learned that a type 2 lever has the load between the fulcrum and the applied force, so it made sense for me to define a Type 2 Lever Cam Ascender as one where the rope was between the sling and the pivot. This is an unusual arrangement for an ascender, and only the Petzl Shunt and its copies use it.

Gallery

Image ID Device Description Acquired Weight Height Width Thickness Std. volume
Petzl Shunt, Version A 99
2271
Petzl Shunt, Version A Stamped Al frame, forged spring-loaded lever /w rope contact pin, cast Al side pieces
  • Pathfinder Sports, 1979
  • Bob Thrun Collection, 2017
152 110 64 76 535
Petzl Shunt, Version B 2314 Petzl Shunt, Version B Stamped anodized Al frame, forged spring-loaded lever /w rope contact pin, cast Al side pieces Bob Elron, 2017 154 109 64 77 532
Petzl Shunt, Version C 100 Petzl Shunt, Version C Stamped Al frame, forged spring-loaded lever /w rope contact pin, stamped steel side pieces John E. Weinel, Inc., 1989 189 110 56 78 480
Petzl Shunt, Version D 1915 Petzl Shunt, Version D Stamped Al frame, forged spring-loaded lever /w rope contact pin, stamped steel side pieces 2012 189 109 55 78 468
Petzl Shunt, Version E 1527
2069
Petzl Shunt, Version E Stamped Al frame, forged spring-loaded lever /w rope contact boss, stamped steel side pieces
  • On Rope 1, 2009
  • Bob Thrun Collection, 2017
175 112 55 79 487
Petzl Shunt, Version F 2338 Petzl Shunt, Version F Stamped Al frame, forged spring-loaded lever /w rope contact boss, stamped steel side pieces Expé-Spelemat, 2017 174 108 55 78 466
Russian copy of Petzl Shunt 101
2292
Russian copy of Petzl Shunt Stamped Al frame, forged spring-loaded lever /w rope contact pin, stamped steel side pieces
  • John E. Weinel, Inc., 1990
  • Bob Thrun Collection, 2017
203 109 59 74 476