Hollow plunger with guide integrated to bobbin assembly
US6998948B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 20, 2004 |
| Grant date | Feb 14, 2006 |
| Priority date | — |
| Expiry date | Jun 12, 2024 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16K31/0658
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
An actuator suitable for use with a fluid flow control valve includes a frame, a bobbin, a coil and a plunger assembly. The frame is generally cylindrical and has a longitudinal axis. The bobbin, which is wound with the coil, includes a central cavity. The plunger assembly is received within the central cavity and includes a plunger portion and a rod portion. The plunger portion is formed of magnetic material. The rod portion may be snapped on the plunger portion to form the plunger assembly. The plunger assembly is configured to move within the cavity in response to an actuator control signal applied to the magnetic coil. Separating the plunger portion and the rod portion improves manufacturability as well as reduces the occurrence of rod damage.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.