Multi-fluid precision calibration pressure source
First Claim
Patent Images
1. A portable calibration pressure device for use with either hydraulic or pneumatic systems, said calibration pressure device comprising:
- a pump;
a manifold fluidly connected to the pump; and
a volume adjuster comprising;
a primary knob with a central bore, at least a portion of the central bore having internal threading;
a volume adjuster housing defining a cylindrical cavity, at least a portion of the volume adjuster housing having external threading engaging the internal threading of the central bore, the volume adjuster housing having a first port that fluidly connects to the pump and a second port that fluidly connects to the manifold;
a primary piston positioned at least partially within the cylindrical cavity and coupled to the primary knob, the primary piston having a central channel;
a secondary piston positioned at least partially within the central channel of the primary piston, the secondary piston and primary piston blocking an end of the cylindrical cavity to form a chamber that fluidly communicates with the first port and the second port; and
a secondary knob mechanically connected to the secondary piston;
wherein rotating the primary knob moves the primary knob, the primary piston, and the secondary piston relative to the volume adjuster housing; and
wherein rotating the secondary knob moves the secondary piston relative to the primary knob, the primary piston, and the volume adjuster housing.
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Abstract
A pressure calibration device can include certain features that allow it to be used with a variety of hydraulic and pneumatic systems. A pressure calibration device can be configured to provide pressure or vacuum, and can have a mode selector for selecting to provide pressure or vacuum. A pressure calibration device can have a volume adjuster configured to modify pressures for hydraulic or pneumatic systems. A pressure calibration device can have a pressure release valve and a bleed valve for adjusting pressure values.
54 Citations
21 Claims
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1. A portable calibration pressure device for use with either hydraulic or pneumatic systems, said calibration pressure device comprising:
- a pump;
a manifold fluidly connected to the pump; and
a volume adjuster comprising;
a primary knob with a central bore, at least a portion of the central bore having internal threading;
a volume adjuster housing defining a cylindrical cavity, at least a portion of the volume adjuster housing having external threading engaging the internal threading of the central bore, the volume adjuster housing having a first port that fluidly connects to the pump and a second port that fluidly connects to the manifold;
a primary piston positioned at least partially within the cylindrical cavity and coupled to the primary knob, the primary piston having a central channel;
a secondary piston positioned at least partially within the central channel of the primary piston, the secondary piston and primary piston blocking an end of the cylindrical cavity to form a chamber that fluidly communicates with the first port and the second port; and
a secondary knob mechanically connected to the secondary piston;
wherein rotating the primary knob moves the primary knob, the primary piston, and the secondary piston relative to the volume adjuster housing; and
wherein rotating the secondary knob moves the secondary piston relative to the primary knob, the primary piston, and the volume adjuster housing. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21)
- a pump;
Specification