Orifice restriction shielding device
US5273652A · kind A · utility
Inventor
Key dates
| Filing date | Jul 13, 1992 |
| Grant date | Dec 28, 1993 |
| Priority date | — |
| Expiry date | Jul 13, 2012 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T29/49602
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
An orifice shield for preventing blockage of an orifice restriction by large particulate matter relative to the size of an orifice restriction in a fluid power control circuit. The orifice sheild incorporates a unitary body provided with a wire coil wound about an external threaded portion of the body. The body includes an internal blind bore and longitudinal slots which cooperate to communicate with the opening between coils of the wire. One end of the body is provided with a rotational driver receiving recess to permit external thread on the body to be threaded into a mating bore. A conventional set screw or round head bolt may be readily modified to form the one piece body portion. Other embodiments are described wherein the unitary body includes an internal threaded bore to accept a removably mounted orifice restriction element wherein the orifice restriction element and shielding device forms a compact unit conveniently removably mountable into a fluid power port opening or passage threadably adapted to receive the shielding device.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.