Impac / Pendpac
Fairview, Oklahoma
By Eric Voytko


Impac ASL, a clone of the old EMCO design (City of Weatherford, Oklahoma)

    Tracing the history of Impac involves multiple corporate entities and is somewhat confusing. It begins with the demise of EMCO of Plainview, Texas in 1983. The groundbreaking EMCO side loader was one of the first mass-produced automated side loaders (ASL) in the world, and had large contracts with the cities of St. Louis and Detroit. The EMCO barrel truck was briefly part of the Rand Automated Sytems family of refuse equipment in the late 1980s. Central Tank of Norman, Oklahoma appears to have been established to service these cities and the numerous smaller fleets that had adopted the EMCO system. The Impac side loader was identical to the circular EMCO body, and by the 1990s was doing business as Mabar. Impac models could be fitted to lift the large EMCO commercial bins or wheeled carts.

    In 2001, John W. Bingman designed a new rectangular-type side-loading refuse packer for Central Tank, which used the EMCO type lift on a body very similar to that of a standard front loader. called Sprinter, it featured a full-eject blade powered by cross-mounted telescopic cylinders. Bingman had worked with Marc Stragier back in 1974 on the original Rapid-Rail lift, and was also inventor of the Sunbelt Automated Systems lift in 1988. The Impac (circular) and Sprinter (rectangular) bodies were stablemates at Mabar.

    In 2003, an new company called Pendpac was formed, to make an all-new pendulum-blade ASL. Pendpac acquired certain intellectual rights and property from Central Tank. The Pendpac, Impac and Sprinter all became a family of refuse bodies. Pendpac even added an all-new front loader into the product line. Within a few years, Pendpac had taken legal action against several defendants including Central Tank, and a manufacturer called Southwestern Equipment Company of Justin, Texas. The lengthy allegations are linked in the case text (see references), and a central claim is that persons conspired to steal trade secrets from Pendpac. In their response, Southwestern noted that the models supposedly copied from Pendpac were commonly known, and that Central Tank had already copied the design of the circular Impac bodies (from the defunct EMCO).

    In 2011, Pendpac was acquired by Enviroquip LLC, and merged into the Labrie refuse equipment family. Three of the the models continue in production with Labrie (Pendpac Alleygator, Impac and Sprinter). The Pendpac Feenix front loader was redundant, and has now been discontinued. In Texas, Southwestern Equipment Co. (SEC) also manufactures the Challenger (circular) Champion (rectangular) side loaders which are very similar to the old Impac products.


Impac 'City of St. Louis' series ASL; They were the first major city to buy the EMCO system




2001 Impac is identical to the EMCO models of the 1970s



1999 CCC with Impac commercial side loader, still in back-up service for Rexburg, Idaho
(Video courtesy of Northwest Garbage Trucks)



Monstrous Impac 1-P-LH-33YD-5STAGE manufactured in 2004



Impac body with leaf vacuum for Arlington County, Virginia; note vents along the roof



Impac leaf vacuum for a Northern Virginia landscape company



The Impac Sprinter side loader, designed by John Bingman



The Sprinter looks very much like a typical front loader body from this angle



Sprinter packer blade face and interior



Sprinter full-eject cross-ram design



The Pendpac Alley-Gator revived the pendulum-packer design used by Bowles and Shu-Pak in the 1960s, only now on a modern ASL



Pendpac pendulum packer hopper video
(Video courtesy of cnoel74)



The Pendpac Feenix front loader became redundant when the brand was absorbed into Labrie/Enviroquip.



SELECTED PATENTS
Patent # Description Inventor Assignee Date
US6494665 Container dumping apparatus for refuse collection vehicle Bingman Central Tank July 13, 1999
US6722839 Refuse collection body Bingman Pendpac October 23, 2001


REFERENCES

EMCO page at Classic Refuse Trucks

Rand Automated Systems page at Classic Refuse Trucks

Labrie page at Classic Refuse Trucks

Southwestern Equipment Co. website

Pendpac v.SEC, et.al. case text at Morelaw.com



9/19/21

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