Servo-controlled integral stop for use with a servo-controlled hydraulic piston
US6742440B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | May 16, 2003 |
| Grant date | Jun 1, 2004 |
| Priority date | — |
| Expiry date | May 16, 2023 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N2203/0048
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
Apparatus, and an accompanying method for use therein, that utilizes working and stopping servo-controlled hydraulic pistons wherein the stopping piston acts as a controlled mechanical stop for the working piston. Both pistons are spaced apart along and coaxially arranged around a common shaft, with each piston moving in a separate cylinder. The working piston is securely attached to the shaft, while the shaft moves through a central, longitudinal bore of the stopping piston. The stopping piston effectively “floats” in its cylinder and produces a greater force than the working piston. A radially extending stop element, situated on the shaft, has a surface configured to abuttingly engage with a complementary surface on the stopping piston such that the stopping piston, once appropriately positioned, controllably stops continued movement of the working piston in a very short time and over a very short distance with little strain induced in the apparatus.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.