Over 90 Years Of Grover Corporation Innovation

In 1929, Grover Piston Ring was founded by Richard Grover. The company is now regarded as a dependable global leader in industrial piston rings, meeting the needs of multi-national companies on nearly every continent.

Grover Founded in Milwaukee


Grover first opened its doors in Milwaukee in 1929, as Grover Piston Ring under founder Richard Grover. It was innovative thinking that led Grover to develop the Permaseal® interlocking joint in 1929. It is the same innovative thinking that drives us to set new benchmarks for quality, efficiency and service today. With its superior sealing features, Permaseal® became the new industry standard, lowering costs for hydraulic cylinder manufacturers.

Product Line Expanded


Grover begins expanding its product line to include compressor and transmission applications bringing the same performance and cost saving advantages to new industries.

Transfer of Ownership


Stuart Banghart purchases Grover Piston Ring, instilling a company-wide commitment to lean manufacturing and identifying new ways to help customers improve quality and production efficiency.

Quality Certification


QS and ISO 9001 certification awarded

Double Seal Ring Company Acquired


In 2005 Grover Corporation acquired the operations of Double Seal Ring Co. of Fort Worth, Texas.
This acquisition greatly enhanced the product lines of both companies while offering unparalleled piston ring production, engineering and customer service capabilities.We've combined the best practices of both companies to ensure that our customers receive the best quality, innovation and knowledge the industry has to offer.

Consolidation of TX and WI Facilities


In January of 2018, Grover Corporation consolidated its Milwaukee, WI and Ft. Worth, TX piston ring production operations into a new, state-of-the-art manufacturing facility in Glendale, WI. The consolidation improves efficiencies and communication, provides for new equipment and company capabilities and positions Grover to enhance its ability to execute on its vision as the best supplier for industrial piston rings.


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