Servoless motor

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United States of America Patent

PATENT NO 11592000
SERIAL NO

16050001

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ATTORNEY / AGENT: (SPONSORED)

Importance

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Abstract

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A hydraulic piston unit including a rotational group for driving or being driven by a driving shaft, and having a tiltable displacement element for adjusting the displacement volume of the rotational group between a minimum or a maximum displacement, wherein, on t valve segment between a kidney-shaped inlet port and a kidney-shaped outlet port at respective dead end positions of reciprocally moveable working pistons first and second control ports are located in fluid connection with cylinder bores in the cylinder block, for controlling the position of the displacement element. The hydraulic piston unit further includes a control valve with a shiftable control valve spool fluidly connected via a high pressure port to a high pressure side of the hydraulic piston unit. The control valve spool is configured to conduct hydraulic fluid from the high pressure side to one of the first or the second control port.

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Patent Owner(s)

Patent OwnerAddress
DANFOSS POWER SOLUTIONS INC2800 EAST 13TH STREET AMES IA 50010

International Classification(s)

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  • 2018 Application Filing Year
  • F04B Class
  • 1144 Applications Filed
  • 841 Patents Issued To-Date
  • 73.52 % Issued To-Date
Click to zoom InYear of Issuance% of Matters IssuedCumulative IssuancesYearly Issuances201820192020202120222023202420250255075100

Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Frantz, Stephen Ames, US 4 2
Hansell, Jeffrey C Boone, US 20 77
Leege, Steven Ames, US 2 1

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Patent Citation Ranking

  • 0 Citation Count
  • F04B Class
  • 0 % this patent is cited more than
  • 2 Age
Citation count rangeNumber of patents cited in rangeNumber of patents cited in various citation count ranges1172121101 - 1011 - 2001002003004005006007008009001000110012001300

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