Patent ID: 7666253

Claim:
A test fixture for collecting particulate material, said fixture having a predefined longitudinal axis and comprising: a first mounting plate disposed in transverse relationship with respect to said longitudinal axis of the fixture and having an opening extending through the plate, said opening being adapted to receive a portion of a filter cartridge holder therein; a second mounting plate disposed in transverse relationship with respect to said longitudinal axis of the fixture and axially moveable along said longitudinal axis between a first position spaced from said first mounting plate and a second position in proximate relationship with said first mounting plate, said second mounting plate having an opening extending through the plate, said opening being adapted to receive a portion of a filter cartridge holder therein; a third mounting plate disposed in transverse relationship with respect to said longitudinal axis of the fixture in fixed axial relationship with said first mounting plate and adapted to support an actuator having an extendable rod connected to said second mounting plate, said second mounting plate being operable between said first and said second positions in response to moving said extendable rod of the actuator while maintaining said first and third mounting plates in fixed axial relationship with each other; and a plurality of guide rods disposed in parallel radially spaced relationship with respect to said longitudinal axis of the fixture, each of said guide rods having a first end fixedly attached to said first mounting plate and a second end fixedly attached to said third mounting plating plate and having an external surface adapted to slideably support said second mounting plate.