Distributive retarder test device
US6216525A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Dec 16, 1998 |
| Grant date | Apr 17, 2001 |
| Priority date | — |
| Expiry date | Dec 16, 2018 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16F9/06
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A testing device is provided for checking the resistive force of a retarder installed on the rail of a railway track for reducing the speed of a railcar rolling along the track. The retarder is a hydraulic unit including a housing, a cylinder slidably mounted in the housing, a piston rod fixed to the housing, a piston assembly fixed to the piston rod and dividing the cylinder into upper and lower chambers, and a valve arrangement responsive to the flow of hydraulic fluid flowing between the upper and lower chambers. The testing device is constructed and arranged to allow a user to check the resistive force of a retarder installed upon the railway track while standing in an upright position.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.