Directional differential pressure detector having a differential pressure set point indicator
AssigneeAirFlow Directions, 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. A 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 is adjustable to have different threshold set points by adjusting the pivot arm inclination relative to a horizontal plane.
Claims32
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;
- a first conduit coupled to the rotatable base, wherein when the rotatable base is rotated, an inclination of the first conduit is adjusted relative to a horizontal plane;
- at least one movable element disposed within the first conduit and movable from a first, vertically lower region of the first conduit to a second, vertically higher region of the first conduit in response to the directional differential pressure between the first space and the second space 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 marker 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 rotatable base configured to be rotatably attached to the barrier;
- a first conduit coupled to the rotatable base, wherein when the rotatable base is rotated, an inclination of the first conduit is adjusted relative to a horizontal plane;
- at least one movable element disposed within the first conduit and movable from a first, vertically lower region of the first conduit to a second, vertically higher region of the first conduit in response to the directional differential pressure between the first space and the second space being greater than a threshold differential pressure;
- and
- a wall plate configured to rotatably secure the rotatable base to the barrier, wherein the wall plate comprises:
- a first level configured to indicate whether an axis of rotation of the first conduit is aligned with the horizontal plane, and
- a second level configured to indicate whether the wall plate is in a correct roll orientation relative to the axis of rotation of the first conduit.
Dependencies are inferred from the claim text.