Dispensing – With material treatment or conditioning means
Reexamination Certificate
2006-05-23
2006-05-23
Nicolas, Frederick (Department: 3754)
Dispensing
With material treatment or conditioning means
C222S321900, C222S145600
Reexamination Certificate
active
07048153
ABSTRACT:
A foam dispensing article is provided which includes a reservoir for receiving a liquid product and an operating unit for dispensing foam as an air-liquid mixture. The unit includes an air pump, a liquid pump concentrically surrounded at least partially by the air pump, an operating component positioned above the pumps containing a foam forming screen device, and a spring system. The spring system functions to return pistons of the air and liquid pumps to an unactivated position and includes an inner spring positioned internally concentric to the air piston. The improvement of the present invention is characterized in the spring device having a return force greater than 4 lbs. (17.8 N). In one embodiment, the spring device includes both an outer spring conically tapered and surrounding an inner spring. The outer spring provides the required force in excess of 4 lbs. (17.8 N). Less liquid drip and piston stickage is achieved with the improvement to the spring system.
REFERENCES:
patent: 2515328 (1950-07-01), Bobrick
patent: 3709437 (1973-01-01), Wright
patent: 3779464 (1973-12-01), Malone
patent: 3937364 (1976-02-01), Wright
patent: 4022351 (1977-05-01), Wright
patent: 4184615 (1980-01-01), Wright
patent: 4274560 (1981-06-01), Cater
patent: 4615465 (1986-10-01), Grothoff
patent: 4735347 (1988-04-01), Schultz et al.
patent: 4895279 (1990-01-01), Schultz
patent: 4964544 (1990-10-01), Hanna et al.
patent: 5220483 (1993-06-01), Scott
patent: 5337929 (1994-08-01), van der Heijden
patent: 5364031 (1994-11-01), Taniguchi et al.
patent: 5443569 (1995-08-01), Uehira et al.
patent: 5782621 (1998-07-01), Harris
patent: 5881956 (1999-03-01), Cohen et al.
patent: 5918771 (1999-07-01), van der Heijden
patent: 6030931 (2000-02-01), Vinski et al.
patent: 6206303 (2001-03-01), Shinozaki et al.
patent: 6264964 (2001-07-01), Mohammadi
patent: 6536629 (2003-03-01), van der Heijden
patent: 6612468 (2003-09-01), Pritchett et al.
patent: 6779689 (2004-08-01), Flaig et al.
patent: 97/13585 (1997-04-01), None
Honig Milton L.
Nicolas Frederick
Unilever Home & Personal Care USA Division of Conopco, Inc
LandOfFree
Foam dispensing article does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Foam dispensing article, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Foam dispensing article will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3592359