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The Stanadyne website tells the story a little differently. Roosa was an employee of Stanadyne/Hartford when he developed his unique injection pump. He's an excerpt from the official Stanadyne site: The history of Stanadyne begins in 1872 with the founding of Chicago Screw company.
Incorporation of Standard Screw Company occurred in 1900 with the merger of Chicago Screw, Hartford Machine Screw and Western Automatic Screw. During the 1950�s, with the inventions of Vernon D. Roosa�s fuel injection pump and Karl Vorhees�s hydraulicv valve lifter, both Stanadyne employees, the company began evolving from a screw machine job shop into a designer, manufacturer, and marketer of complex proprietary products. Chicago Screw, Hartford Screw, and Western Automatic Screw became divisions of Standard Screw in 1955.
In 1970, Standard Screw changed its name to Stanadyne to better reflect its new dynamic image. Through the 70�s, growing with the industry, Stanadyne became a major independent manufacturer of hydraulic valve lifters
for the OEM and replacement market.
PEP-C became a wholly owned subsidiary of Stanadyne Automotive in 1989. The Tallahassee facility, PEP-C Headquarters, which opened in 1985, is a state of the art, hydraulic lash adjuster assembly facility with capacity to
assemble 150,000 lash adjusters per day. In the 90�s Stanadyne / PEP-C became the only North American designer, developer, and producer of a family of aluminum hydraulic roller rocker arms for type III valve trains
produced in North America. The rocker arm assembly is made up of 25 components and Tallahassee assembles in excess of 50,000 per day. Over a million engines are using these rocker arm assemblies and there are less than
one part per million warranty complaints. Even now Stanadyne / PEP-C is designing new, smaller, lighter weightcomponents to keep up with the changing engine market.
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