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.

ID	Device ↓	Description	Acquired	Weight ↓	Height ↓	Width ↓	Thickness ↓	Std. volume ↓
101 2272	Boris Laptev (Борис Лаптев)	Stamped anodized Al frame, forged spring-loaded lever /w rope contact pin, stamped steel side pieces	Miles Bradshaw, 2024	186	108	54	75	438
3655	Cascade (Каскад)	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
3451	Orion-Alp (Орион-Альп)	Stamped Al frame, forged spring-loaded lever /w rope contact boss, stamped steel side pieces	Artyom Babin (Артём Бабин), 2021	177	109	55	79	474
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
2314 3614	Petzl Shunt, Version B	Stamped anodized Al frame, forged spring-loaded lever /w rope contact pin, cast Al side pieces	Bob Elron, 2017 Michael Oatney, 2023	154	109	64	77	532
2982 3467	Petzl Shunt, Version C	Stamped anodized Al frame, forged spring-loaded lever /w rope contact pin, stamped steel side pieces	Seth Parks, 2021 On Rope 1, 2021	176	109	55	77	460
2950	Petzl Shunt, Version D	Stamped anodized Al frame, forged spring-loaded lever /w rope contact pin, stamped steel side pieces	Adventure Outdoors, 2019	180	107	55	77	450
100	Petzl Shunt, Version E	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
1915	Petzl Shunt, Version F	Stamped Al frame, forged spring-loaded lever /w rope contact pin, stamped steel side pieces	2012	189	109	55	78	468
2909	Petzl Shunt, Version G	Stamped Al frame, forged spring-loaded lever /w rope contact boss, stamped steel side pieces	Noco Gear, 2019	186	104	55	78	448
1527 2069	Petzl Shunt, Version H	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
2338 2951	Petzl Shunt, Version I	Stamped Al frame, forged spring-loaded lever /w rope contact boss, stamped steel side pieces	Expé-Spelemat, 2017 Adventure Outdoors, 2019	174	108	55	78	466
3560	Sinto	Stamped painted Al frame, cast spring-loaded lever /w rope contact pin, stamped steel side pieces	Artyom Babin (Артём Бабин), 2022	187	108	56	78	474
3483	Vertical Double Rope Clamp	Stamped Al frame, forged spring-loaded lever /w rope contact boss, stamped steel side pieces	Artyom Babin (Артём Бабин), 2021	182	111	59	80	526