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US Patent: 5,237,916
Regenerative hydraulic cylinders with internal flow paths
Leon Malashenko - Toronto, ON Canada

USPTO Classifications:
100/269.14, 425/450.1, 425/451.2, 72/453.12, 91/422, 92/181P

Tool Categories:
metalworking machines : metalworking presses : hydraulic presses

John T. Hepburn, Ltd. - Mississauga, ON Canada

John T. Hepburn, Ltd. - Mississauga, ON Canada


Patent Dates:
Applied: Jun. 18, 1992
Granted: Aug. 24, 1993

Patent Pictures:
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"Vintage Machinery" entry for John T. Hepburn, Ltd.
"A regenerative hydraulic cylinder has a piston dividing its interior into a pair of chambers. A rod extends from the piston through a cylinder end wall. Several axial passages in the piston extend between opposite piston faces..."

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