Seal for a joint or juncture – Seal between fixed parts or static contact against... – Contact seal for other than internal combustion engine – or...
Reexamination Certificate
2002-01-16
2004-11-30
Knight, Anthony (Department: 3676)
Seal for a joint or juncture
Seal between fixed parts or static contact against...
Contact seal for other than internal combustion engine, or...
C277S634000, C277S635000, C347S085000
Reexamination Certificate
active
06824139
ABSTRACT:
TECHNICAL FIELD OF THE DISCLOSURE
This invention relates to pumps for pumping a liquid, such as ink in inkjet printing systems.
BACKGROUND OF THE DISCLOSURE
In order to supply pressurized ink for ink-jet printing systems, a diaphragm style elastomer pump has been used in the ink supply for supplying ink to a printhead. The pump included a molded elastomeric membrane that was placed below a rigid chamber. The perimeter of the membrane was placed against the brim of a pump chamber. The membrane was held in place with a crimp sleeve that ran along the perimeter of the membrane. The crimp sleeve was crushed to force the membrane against the chamber brim.
SUMMARY OF THE DISCLOSURE
An overmolded diaphragm pump is described for applying pumping force to a liquid. The pump structure includes a rigid substrate having at least one chamber opening, and an elastomeric diaphragm and sealing structure fabricated of an elastomeric material. This diaphragm and sealing structure is overmolded over a portion of the rigid substrate and includes at least one diaphragm portion extending over a corresponding chamber opening. A gland seal portion makes a seal between the elastomeric diaphragm and sealing structure and a mating part.
REFERENCES:
patent: 2918089 (1959-12-01), McFarland
patent: 5784087 (1998-07-01), Wallace et al.
patent: 5854646 (1998-12-01), Barinaga et al.
patent: 6305793 (2001-10-01), Haines
patent: 6350024 (2002-02-01), Haines
Barinaga Louis C.
Dowell Dan D.
Hewlett--Packard Development Company, L.P.
Peavey Enoch
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