Hydraulic oscillator
US4280396A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | May 18, 1978 |
| Grant date | Jul 28, 1981 |
| Priority date | — |
| Expiry date | May 18, 1998 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB06B1/183
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A hydraulic oscillator in which a piston reciprocates between first and second positions in a cylinder. A reversing pilot valve controls fluid flow to ends of the cylinder and flow through first and second pilot passages control the reversing operation of the pilot valve. The cylinder has a pilot channel or groove coupled to a pilot supply line. The piston has (1) a first logic channel for fluidly coupling the pilot channel and first pilot passage as the piston approaches the second position and (2) a second logic channel for fluidly coupling the pilot channel and second pilot passage as the piston approaches the first position thereby to alternately reverse the pilot valve and produce the reciprocation of the piston.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.