Heavy duty hydraulic weighing apparatus
US4055227A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | May 6, 1976 |
| Grant date | Oct 25, 1977 |
| Priority date | — |
| Expiry date | May 6, 1996 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01G5/003
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A heavy duty hydraulic weighing apparatus includes an integral base having a piston mounted in and encircled by an annular ring, a cooperating cylinder which fits radially between the piston and ring to receive the piston in freely interfittable relatively reciprocally moveable relation, and a flexible diaphragm of fluid impervious material sealed in the cylinder and overlying the piston to form a pressure receiving chamber. A bearing arrangement, which facilitates free relative reciprocal movement between the piston and base and the cylinder to permit heavy loading, comprises a plurality of cylindrical raceways, a first portion of each being defined in the outer wall of the cylinder and a second portion of each being defined in the inner wall of the annular ring. First and second bearing inserts, which are highly resistant to wear and minimize bearing friction, at least partially line the first and second raceway portions respectively. These inserts are arcuate, having angular dimensions less than the angular dimensions of the raceway portion in which they are installed, and are recessed into the raceway portions to be firmly held therein. Ball bearings are disposed in each racewa…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.