Inventor
Marvin L. Bernstrom
Inventor
Eden Prairie, MN, US
Overview
Patents· 15 as inventor
Public. Assignee & technology derived from the patent record. Each patent links to its LexDana page.
F04Cprimary
F04CRotary-piston, or oscillating-piston, positive-displacement machines for liquids54%
F03CPositive-displacement engines driven by liquids23%
F01CRotary-piston or oscillating-piston machines or engines8%
F16KValves8%
F15CFluid-circuit elements predominantly used for computing or control purposes4%
Y10TTechnical subjects covered by former us classification4%
PatentTitleYear
6,679,691'Anti cavitation system for two-speed motors'20046,544,018'Hydraulic motor having multiple speed ratio capability'20036,371,149'Shuttle valve assembly and improved shifting thereof'20026,126,424'Transistion valving for gerotor motors'20006,099,280'Two speed geroter motor with external pocket recirculation'20005,624,248'Gerotor motor and improved balancing plate seal therefor'19975,593,296'Hydraulic motor and pressure relieving means for valve plate thereof'19975,516,268'Valve-in-star motor balancing'19965,328,343'Rotary fluid pressure device and improved shuttle arrangement therefor'19945,009,582'Rotary fluid pressure device and improved stationary valve plate therefor'19914,976,594'Gerotor motor and improved pressure balancing therefor'19904,756,676'Gerotor motor with valving in gerotor star'19884,741,681'Gerotor motor with valving in gerotor star'19884,715,798'Two-speed valve-in star motor'19874,613,292'Hydraulic motor having free-wheeling and locking modes of operation'1986Career & activity timeline
Assembled from patent assignee/location history and declaration credentials.
1986–2004Patents assigned to EATON CORP (15)· patent assignee history
1986–2004Based in Eden Prairie, MN, US· patent location history
1988Patents assigned to BERNSTROM MARVIN L (1)· patent assignee history
Inventor activity
Assignee and location history derived from the patent record.
Assignees
| Assignee | Patents | Span |
|---|---|---|
| EATON CORP | 15 | 1986–2004 |
| BERNSTROM MARVIN Lself | 1 | 1988 |
Locations
| Location | Patents | Span |
|---|---|---|
| Eden Prairie, Minnesota, US | 15 | 1986–2004 |