| CPC F17C 13/04 (2013.01) [B01D 29/33 (2013.01); B01D 2201/167 (2013.01); B01D 2201/20 (2013.01); B01D 2201/287 (2013.01); B01D 2201/303 (2013.01); B01D 2201/304 (2013.01); F17C 13/06 (2013.01)] | 14 Claims |
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1. A filtration system, comprising:
a pressure vessel having an opening;
a filter cartridge received in the pressure vessel, wherein the titter cartridge is adapted to be inserted into and removed from the pressure vessel through the opening;
a lid assembly sealing the opening of the pressure vessel when secured to the pressure vessel, and further comprising a filter access cap having a top portion, a bottom portion, and a tubular portion extending from the top portion to the bottom portion to define a throughhole, the top portion having a radial slot;
rotational interference-fit structures securing the lid assembly to the pressure vessel when engaged, whereby rotation of the lid assembly in a first direction about an axis with respect to the pressure vessel engages the rotational interference-fit structures while rotation in a second direction disengages the rotational interference-fit structures;
a relief valve coupled to the lid assembly for selectively releasing non-atmospheric pressure from the pressure vessel when opened;
an arm operatively engaging the relief valve and having a distal end pivotally secured to the lid assembly, whereby when the arm is pivoted in a first direction, the relief valve opens and a proximal end of the arm extends further outwardly from the axis such that torque applied through the arm to the lid assembly is increased to ease rotation of the lid assembly wherein:
in a closed position, the arm allows the relief valve to be closed;
in a relieve position, the arm is manually pressed to open the relief valve and, thereby, relieve the pressure; and
in a removal position, the arm is configured to act as a handle to remove the lid assembly from a top housing; and
an arm weldment having: a proximate end rotatable pinned to the distal end of the arm; and a distal end rotatable pinned to the pressure relief valve, wherein:
the radial slot has a first side and a second side of a same length;
the arm is longer than the same length;
in the closed position, the proximal end of the arm is substantially in the first side of the radial slot and the proximal end of the arm weldment is in the second side of the radial slot so that the arm weldment does not exert a force on the relief valve; and
in the relieve position, the proximal end of the arm extends out of the second side of the radial slot so that when manually pressed, the arm weldment pulls on the relief valve and, thereby, opens the relief valve.
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