Invention Grant
- Patent Title: Road construction machine, crawler track unit of a road construction machine, as well as method for tensioning a chain of a crawler track unit
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Application No.: US14691705Application Date: 2015-04-21
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Publication No.: US10562573B2Publication Date: 2020-02-18
- Inventor: Peter Busley , Burkhard Frank , Cyrus Barimani
- Applicant: Wirtgen GmbH
- Applicant Address: DE
- Assignee: Wirtgen GmbH
- Current Assignee: Wirtgen GmbH
- Current Assignee Address: DE
- Agency: Patterson Intellectual Property Law, PC
- Agent Lucian Wayne Beavers
- Priority: DE102009013708 20090320
- Main IPC: B62D55/065
- IPC: B62D55/065 ; B62D55/30
Abstract:
A road construction machine includes a machine frame and two front and two rear crawler track units. Each crawler track unit includes a piston-cylinder unit. A central pressure limiting valve communicates a hydraulic pressure source with a hydraulic supply line. The hydraulic supply line communicates the central pressure limiting valve with the piston-cylinder units of all four crawler tracks. A common pressure accumulator is communicated with all four of the piston-cylinder units.
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