Differential pressure gauge
US4030365A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jun 28, 1976 |
| Grant date | Jun 21, 1977 |
| Priority date | — |
| Expiry date | Jun 28, 1996 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01L7/084
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A differential pressure gauge of the type comprising a controlling magnetic helix device carrying a pressure indicating arm, the position of which is controlled by a magnet mounted on the free end of a cantilevered leaf spring actuated by a pressure diaphragm exposed to differential pressures. The helix cooperates with a magnet having a planar pole face paralleling the axis of the helix and defining a magnetic axis that is normal to and intersects the helix axis. The gauge housing defines an integral one piece pressure wall that separates the helix from the magnet and defines within the gauge housing pressure cavity an operating space within which the magnet and its supporting leaf spring are mounted and operate. Between the helix and the magnet the pressure wall is of film dimensions and is contoured to stress in bending. The leaf spring is mounted on a mounting plate disposed within the pressure cavity and engaging the gauge housing only at its rim for stress isolation purposes. The mounting plate also shiftably mounts an adjustable fulcrum for the leaf spring in the form of a clamp device which may be both positionally adjusted and operated through a common access opening in the…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.