# ASME — EIMCO Rocker Shovel Loader, Model 12B Landmark

**Type:** source
**Status:** Useful
**Confidence:** High
**Source Type:** Professional Society Record
**URL:** https://www.asme.org/about-asme/engineering-history/landmarks/212-eimco-rocker-shovel-loader-model-12b
**Publisher:** American Society of Mechanical Engineers (ASME)
**Accessed:** 2026-06-25
**Updated:** 2026-06-25

## Summary

The ASME Historic Mechanical Engineering Landmark designation for the EIMCO Model 12B Rocker Shovel Loader, with the landmark example located in Park City, Utah. The designation page and associated brochure credit EIMCO Corporation of Salt Lake City and describe the machine's significance in mechanizing underground hard-rock mining.

## Useful Claims

- ASME designates the Model 12B as the first successful mining device to replace human labor in removing rubble from underground hard-rock blasting
- The machine was manufactured by EIMCO Corporation in Salt Lake City
- The landmark example is in Park City, Utah
- The rocker-shovel mechanism used compressed air and a bucket-on-rocker-arms design
- About 29,000 units sold by 1969, with licensed manufacturing in Great Britain, India, South Africa, and Japan

## Reliability Notes

ASME landmark designations are peer-reviewed by engineering historians and represent authoritative professional recognition. High reliability for factual claims about the machine's significance and commercial reach.

## Related Pages

- [EIMCO Rocker Shovel Loader](eimco-rocker-shovel-loader.md)