Lift crane with mast-raising mechanism

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United States of America Patent

PATENT NO 9415980
APP PUB NO 20150210516A1
SERIAL NO

14605806

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ATTORNEY / AGENT: (SPONSORED)

Importance

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Abstract

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A mast-raising mechanism for raising a mast of a mobile lift crane to an operating position includes a hydraulic cylinder extendable to raise the mast. The hydraulic cylinder includes a first end pivotally coupled to a rotating bed of the crane and a second end spaced apart from the first end. A first arm includes a first end pivotably coupled to the second end of the hydraulic cylinder. The hydraulic cylinder extends to press the first end against a bearing surface on the mast. The first arm also includes a second end spaced apart from the first end. A second arm includes a first end proximate the second end of the first arm and a second end spaced apart from the first end. The second end of the second arm is pivotably connected to the rotating bed. A biasing mechanism urges the first arm towards the second arm.

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Patent Owner(s)

Patent OwnerAddress
MANITOWOC CRANE COMPANIES LLC2400 SOUTH 44TH STREET MANITOWOC WI 54220

International Classification(s)

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  • 2015 Application Filing Year
  • B66C Class
  • 359 Applications Filed
  • 310 Patents Issued To-Date
  • 86.36 % Issued To-Date
Click to zoom InYear of Issuance% of Matters IssuedCumulative IssuancesYearly Issuances201520162017201820192020202120220255075100

Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Geiser, Darin J Appleton, US 1 0
Walker, Robert J Manitowoc, US 21 408

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Patent Citation Ranking

  • 0 Citation Count
  • B66C Class
  • 0 % this patent is cited more than
  • 9 Age
Citation count rangeNumber of patents cited in rangeNumber of patents cited in various citation count ranges50128401 - 1011 - 200102030405060708090100110120130140

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