Jaw crushers
US3976255A · kind A · utility
10Cited by
5References
4Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Mar 13, 1975 |
| Grant date | Aug 24, 1976 |
| Priority date | — |
| Expiry date | Mar 13, 1995 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB02C1/025
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
A jaw crusher is provided with a pressure relieving system to allow a movable jaw of the crusher to yield in case of an excess crushing load. The movable jaw is urged outwardly by a spring and an hydraulic ram exerts inward pressure on the jaw against the spring action. The ram has a control system for reducing the ram pressure when an excess load is encountered allowing the spring to move the jaw outwardly and after a suitable time delay for re-establishing the pressure within the ram to return the jaw to its inner position against the spring action.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.