Royer Manufacturing Company – Hawkeye Maintainer Company, 1928-1940 and n. d.
[Back to Formatted Version]
Brief Description: This collection consists of sales literature discussing the company’s products.
Held at:
Historical Construction Equipment Association
16623 Liberty Hi Rd
Bowling Green, OH 43402
Phone: 419-352-5616
Fax: 419-352-6068
Email: tberry [at]
Record Series Number: 1/101/1811
Created by: Royer Manufacturing Company (1908-)
Volume: 0.05 Linear Feet
Arrangement: Group 1, Machinery Records, is arranged by subseries, record format, record type, machine class, and publication date (where known).
Biographical Note for Royer Manufacturing Company (1908-) :

Jesse R. Royer founded Royer Manufacturing Company in Janesville, Iowa, in 1908. The firm was incorporated in 1910, and re-incorporated in 1928.

Royer’s initial product was a horse-drawn patrol grader, and he developed a motor grader conversion for wheel tractors circa 1925 which was termed the first motorized snow removal system to be built in America.

At the time of the re-incorporation, Royer established Hawkeye Maintainer Company of Waterloo, Iowa, as its Road Machinery Division, and the first Hawkeye Motor Patrol, a conversion of a wheel tractor, was offered in the late fall of 1928. Hawkeye offered these conversions for several makes of tractors. The Hawkeye operation continued as late as 1931, and Royer – which eventually came to concentrate on snowplows – offered graders as late as 1937.

Royer also developed a line of snowplow attachments for trucks and tractors, a sweeper for removing sleet and ice accumulations and, during World War II, machine gun parts and engine mounts for the M-4 Sherman tank.

Martin Henke purchased Royer Manufacturing in September 1946 and renamed it Henke Manufacturing Company. Edward Green purchased the firm in 1967 and established Henke as a leading supplier of snow removal attachments for Deere & Company equipment. Henke relocated to Waverly, Iowa, in 1978. It filed for bankruptcy protection in 1992 and was sold in 1993 to investors who re-established it in Leavenworth, Kansas.

Access Restrictions: There are no restrictions on this collection.
Subject Index
Administrator for National Recovery
Air cleaner
Crawler conversion
Gas engine
Hawkeye Maintainer Company
Hawkeye Motor Patrol
Henke Manufacturing Company
Industrial wheel tractor
Janesville, Iowa
Jesse R. Royer
Leavenworth, Kansas
Machine gun
Martin Henke
Moon Track Company
Motor grader conversion
North Dakota State Highway Department
Oil filter
Oliver Corporation
Pull grader
Pull sweeper
Road Machinery Manufacturing Industry Code
Royer Manufacturing Company
Sherman tank
Snow plow
Tractor test
Twin City
Used equipment
Waterloo, Iowa
Waverly, Iowa
Wheel tractor
Zero Pressure Tire
Genres/Forms of Material
Bid solicitation
Comparative spec
Composite catalog
Operation manual
Price page
Sales literature
Sales training
Service literature
Spec sheet
Languages of Materials
English [eng]
Acquisition Notes:   This is an artificial collection comprised of records from multiple accessions. Initial records in this collection were received in the Judd Griffith Collection, Accession 2000-0113 (received Sep 22 2000). Additional records were received from: