Synchronized speed shifting of multiple motors
US7571605B2 · kind B2 · utility
0Cited by
7References
19Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jan 3, 2007 |
| Grant date | Aug 11, 2009 |
| Priority date | — |
| Expiry date | Aug 24, 2027 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF15B2211/782
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A system and method for substantially simultaneously shifting the speed of a plurality of multiple-speed motors that have shifting valves. The system and method includes substantially simultaneously applying an equal shifting force to all shifting valves, resisting shifting of all shifting valves with an equal biasing force arising from deflection of springs contained in springs chambers, and fluidly communicating all spring chambers with a common receptacle to equalize the pressure in all spring chambers.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.