Liquid purification or separation – With repair or assembling means – Hoist or handle means
Patent
1984-10-23
1985-11-26
Spitzer, Robert
Liquid purification or separation
With repair or assembling means
Hoist or handle means
210445, 210450, 210453, 210454, B01D 2910
Patent
active
045553378
ABSTRACT:
A plug and filter assembly for a paint sprayer is characterized by a hand turnable knob that is rotatably coupled to a sealing plug to reduce the torque needed to install or remove the assembly from a paint head by axially advancing the plug into or out of an O-ring seal without having to turn the plug in the O-ring. The rotatable coupling is effected by a fastener having a head and a cylindrical shank portion which is received in an oversized central axial bore in the knob. The cylindrical shank portion has a diameter greater than that of a threaded end portion of the fastener secured in the plug and thus defines a shoulder which engages an axial end face of the plug positively to fix the axial spacing between the fastener head and plug to a distance greater than the axial length of a portion of the knob axially trapped between the fastener head and plug for free nonbinding rotation of the knob. A filter screen is coaxially connected to the plug by a coil spring and inner and outer end caps for insertion and removal of the assembly as a unit.
REFERENCES:
patent: 2629632 (1953-02-01), Munson
patent: 2937754 (1960-05-01), Kasten
patent: 3363762 (1968-01-01), Ensign
patent: 3767053 (1973-10-01), Bavin
patent: 3909414 (1975-09-01), Drath
patent: 4028254 (1977-06-01), Shufflebauger et al.
patent: 4124511 (1978-11-01), Lay
patent: 4404103 (1983-09-01), Drath
patent: 4442003 (1984-04-01), Holt
Spitzer Robert
The Wooster Brush Company
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