Manual override system for rotary magnetically operated valve
US5372351A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jan 27, 1994 |
| Grant date | Dec 13, 1994 |
| Priority date | — |
| Expiry date | Jan 27, 2014 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16K31/055
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A manual override for a magnetically operated rotary valve (10) is provided. The valve includes a rotary member connected to an internal carrier (18) that carries a plurality of permanent magnets (20). A rotary drive carrier (22) also carries a plurality of permanent magnets (24) and is separated from the internal carrier (18) by a hermetic barrier member (42). At one end the barrier member (42) is affixed to a rotatable plate member (26) that is held stationary by a removable pin (64) that interconnects the plate member (26) and a support member (56) affixed to the valve body (12). Rotation limit means are constituted by a pin (40) on the driven portion of the valve which is received in a cooperating recess (36) in the plate member (26). If the valve member jams and there is not sufficient magnetically-induced torque to free the valve member then the override of the invention will come into play. The removable pin (64) is removed and a lever (76) is attached to the plate member (26) to effect rotation thereof until there is engagement between the rotation limit means (40, 36). Continued rotation of the plate member (26) transfers rotative torque through the rotation limit means (3…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.