Differential pressure gauge for filter
First Claim
Patent Images
1. An apparatus for measuring the differential pressure of fluid in filter, the apparatus comprising:
- (a) a housing defining a pressure chamber;
(b) a differential pressure gauge dividing the pressure chamber into first and second chambers, the differential pressure gauge arranged to measure a differential pressure between the first chamber and the second chamber, the differential pressure gauge having an output, the output being a variable signal;
(c) the differential pressure gauge comprising a magnet emitting a magnetic field and a hall-effect sensor positioned to detect the magnetic field emitted from the magnet the magnet being movable relative to the hall-effect sensor throughout a range of distances, the range of distances including at least one distance corresponding to no pressure differential and a plurality of distances corresponding to a pressure differential; and
(d) wherein the variable signal correlates to and varies throughout substantially the entire range of distances.
0 Assignments
0 Petitions
Accused Products
Abstract
An apparatus for measuring the differential pressure of fluid in filter. The apparatus comprises a housing defining a pressure chamber. A differential pressure gauge divides the pressure chamber into first and second fluid chambers. The differential pressure gauge is arranged to measure a differential pressure between fluid in the first chamber and fluid in the second chamber. The differential pressure gauge has a variable output.
-
Citations
21 Claims
-
1. An apparatus for measuring the differential pressure of fluid in filter, the apparatus comprising:
-
(a) a housing defining a pressure chamber; (b) a differential pressure gauge dividing the pressure chamber into first and second chambers, the differential pressure gauge arranged to measure a differential pressure between the first chamber and the second chamber, the differential pressure gauge having an output, the output being a variable signal; (c) the differential pressure gauge comprising a magnet emitting a magnetic field and a hall-effect sensor positioned to detect the magnetic field emitted from the magnet the magnet being movable relative to the hall-effect sensor throughout a range of distances, the range of distances including at least one distance corresponding to no pressure differential and a plurality of distances corresponding to a pressure differential; and (d) wherein the variable signal correlates to and varies throughout substantially the entire range of distances. - View Dependent Claims (2, 3, 4, 5, 6)
-
-
7. An apparatus for measuring the differential pressure of fluid in filter, the apparatus comprising:
-
(a) a housing defining a pressure chamber; (b) a gauge member dividing the chamber into first and second chambers; (c) a programmable sensor having an electrical output, the sensor arranged to detect the gauge member and output a variable electrical signal in response to detection of the gauge member; and (d) wherein the gauge member is spaced from the programmable sensor and movable over a range of distances relative to the programmable sensor, and the variable electric signal correlates to and varies throughout substantially the entire range of distances. - View Dependent Claims (8, 9, 10, 11, 12, 13, 14, 15, 16)
-
-
17. A method of measuring differential pressure in a filter head, the method comprising:
-
(a) inputting fluid into first and second chambers; (b) creating the differential fluid pressure between the fluid in the first chamber and fluid in the second chamber; (c) moving a magnet over a range of distances relative to a hall-effect sensor and in response to a change in differential fluid pressure; (d) detecting a magnetic field emitted from the magnet with the hall-effect sensor; and (e) outputting a variable output in response to creation of the differential fluid pressure, the variable output indicative of at least two predetermined differential pressures, the variable output correlating to and varying throughout substantially the entire range of distances. - View Dependent Claims (18, 19, 20, 21)
-
Specification