Directional differential pressure detector
AssigneeAirFlow Direction, Inc.
InventorBrian M. Wiseman
Life of this patent
Estimating the term…
Abstract
Methods and apparatuses for indicating the presence of a threshold directional differential pressure between separated adjacent spaces. An inclined conduit contains at least one movable element that indicates whether the pressure difference between the two spaces is at least as high as a threshold pressure difference. The apparatus may provide a compact arrangement while allowing the movable element to have a suitable travel path length within the conduit.
Claims27
A device for indicating a presence of a directional differential pressure between a first space and a second space separated from the first space by a barrier, the device comprising:
- a rotatable base configured to be rotatably attached to the barrier;
- an inclined conduit coupled to the rotatable base, wherein when the rotatable base is rotated, an inclination of the inclination conduit is adjusted relative to a horizontal plane, and wherein the inclined conduit has a longitudinal direction which is transverse to the rotatable base;
- at least one movable element disposed within the inclined conduit and movable from a first, vertically lower region of the inclined conduit to a second, vertically higher region of the inclined conduit in response to the directional differential pressure between the first and second spaces being greater than a threshold differential pressure;
- and
- a differential pressure set point indicator fixed to the rotatable base, wherein the differential pressure set point indicator includes a vial shaped in an arc and at least one movable pointer disposed in the vial.
A device for indicating a presence of a directional differential pressure between a first space and a second space separated from the first space by a barrier, the device comprising:
- a first conduit portion having a longitudinal axis;
- a second conduit portion fluidly connected to the first conduit portion;
- at least one movable element disposed within the second conduit portion and movable from a first, vertically lower region of the second conduit portion to a second, vertically higher region of the second conduit portion in response to the directional differential pressure between the first and second spaces being greater than a threshold differential pressure,
- wherein the second conduit portion has a travel path for the movable element, wherein the travel path extends transversely to an extension of the first conduit portion longitudinal axis and extends beyond the extension of the first conduit portion longitudinal axis in two opposite directions.
A device for indicating a presence of a directional differential pressure between a first space and a second space separated from the first space by a barrier, the device comprising:
- a baseplate configured to be attached to the barrier;
- a rotatable base configured to be rotatably attached to the baseplate;
- an inclined conduit coupled to the rotatable base, wherein when the rotatable base is rotated, an inclination of the inclination conduit is adjusted relative to a horizontal plane;
- at least one movable element disposed within the inclined conduit and movable from a first, vertically lower region of the inclined conduit to a second, vertically higher region of the inclined conduit in response to the directional differential pressure between the first and second spaces being greater than a threshold differential pressure;
- a pitch indicator configured to indicate the inclination of the inclined conduit relative to the horizontal reference plane;
- a roll indicator configured to indicate a roll orientation of the device;
- and
- a differential pressure set point indicator, wherein the differential pressure set point indicator includes a plurality of markings disposed on the baseplate and a marker disposed on the rotatable base.
Dependencies are inferred from the claim text.