B - Operations – Transporting – 05 – B
Patent
B - Operations, Transporting
05
B
222/78
B05B 9/00 (2006.01) B67D 7/02 (2010.01) B05B 11/00 (2006.01) B65D 47/34 (2006.01)
Patent
CA 1204416
DOWN-LOCKING PUMP Abstract of the Disclosure When the plunger is fully depressed, radially projecting lugs carried by the plunger adjacent its normally upper end may be received within corresponding notches in a collar through which the plunger recipro- cates, whereupon rotation of the plunger in a clockwise direction moves the lugs under overhanging shoulders of the collar so as to prevent extension of the plunger until it is intentionally unlocked from the collar. A total of three lugs are utilized so as to provide three-point, stablized retention of the plunger in its locked-down condition, and one of the lugs and its corresponding notch is smaller than the other two so that the plunger can be locked only when it is in a certain, predetermined rotative position relative to the collar aligning the down-sized lug and notch. Each of the shoulders is provided with a lower, lug-engaging, inclined surface which bears against its corresponding lug with progressively increasing force for fluid-tight sealing purposes as the plunger is rotated into a fully locked condition, there being abutments associated with the shoulders blocking movement of the lugs beyond positions corresponding to the fully locked and rotated position of the plunger.
413255
Foster Donald D.
Magers Wallace F.
Gowling Lafleur Henderson Llp
Realex Corporation
LandOfFree
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