Plunger assembly having a preset spring force pre-load
US6409145B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 28, 2000 |
| Grant date | Jun 25, 2002 |
| Priority date | — |
| Expiry date | Feb 28, 2020 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16K31/046
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A uniformly preset spring force pre-load among a number of identical solenoid actuated valve assemblies (28) by uniquely adjusting the spring pocket length (L) of each respective plunger (12) to accommodate a respective spring (20) which is uniquely mated thereto. This adjustment is accomplished using a two-component plunger (12) consisting of a plunger body (14) having a central bore (22) and a rod (18) slidably located within the central bore. The rod (18) is press-fit into the central bore (22), and the spring pocket includes a portion of the central bore unoccupied by the rod. By pressing the rod (18) a selected distance into the central bore (22), a precisely set spring pocket is obtained which is uniquely correct for a selected spring (20), in that the selected spring is compressed to a precisely preset spring force pre-load. The adjusted plunger (12) and spring (20) are uniquely assigned to each other to collectively form a customized plunger assembly (10) having a preset spring force pre-load, whereupon a valve assembly (28) is manufacturable therewith having the precisely preset spring force pre-load. In carrying-out the adjustment of the plunger (12) with respect to a spe…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.