US4487341A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dispenser for dispensing creams and especially self-foaming gels
Assignee: Colgate Palmolive Co
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Filing: 1981-10-01
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Granted: 1984-12-11
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Expires: 2001-10-01
Abstract
Abstract A dispenser comprising a container having a neck provided with an outlet spout. A dip tube nozzle by use of a finger button is slidably mounted in the container and has a delivery opening alignable with the spout. Serrated teeth are formed on the container and dip tube and a piston is movably mounted on the dip tube for being depressed downwardly to force product up the dip tube. The piston is retained in the lowered position by the serrated teeth engaging a flexible disc while the dip tube is returned to a raised position by a suitable spring.
Inventors
- 👤 Kenneth Daykin
- 👤 Alan Straw
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 05:56
CPC Classifications
G; G01; G01F; G01F11/00; G01F11/02; G01F11/021; G01F11/025; B; B65; B65D; B65D83/00; B65D83/76; B65D83/763
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
128 words
A dispenser comprising a container having a neck, a spout connected to said neck, a dip tube slidably mounted in said neck and including a slot movable into alignment with said spout when said dip tube is depressed, the outer surface of said dip tube and the inner surface of said container being serrated to form teeth, a piston slidably mounted on said dip tube, said piston including a flexible disc having initially downturned concentric peripheral edges permitting initial movement of said piston upwardly during a filling operation, the inner and outer peripheral edges of the flexible disk engage the serrated teeth on the dip tube and inner surface of the wall, respectively, said concentric peripheral edges being turned upwardly upon initial downward movement of said dip tube.
Claim 2
Dependent Claim
128 words
A dispenser comprising a container having a neck, a spout connected to said neck, a dip tube slidably mounted in said neck and including a slot movable into alignment with said spout when said dip tube is depressed, the outer surface of said dip tube and the inner surface of said container being serrated to form teeth, a piston slidably mounted on said dip tube, said piston including a flexible disc having initially downturned concentric peripheral edges permitting initial movement of said piston upwardly during a filling operation, the inner and outer peripheral edges of the flexible disk engage the serrated teeth on the dip tube and inner surface of the wall, respectively, said concentric peripheral edges being turned upwardly upon initial downward movement of said dip tube.
Claim 3
Dependent Claim
113 words
A dispenser comprising a container having an outlet, a dip tube in said container adapted to be aligned with said outlet, the outer surface of said dip tube and the inner surface of said container being serrated to form teeth, a piston slidably mounted on said dip tube, said piston including a flexible disc having an initially downturned concentric peripheral edges portion permitting initial movement of said piston upwardly during a filling operation, the inner and outer peripheral edges of the flexible disk engage the serrated teeth on the dip tube and inner surface of the wall, respectively, said concentric peripheral edges being turned upwardly upon initial downward movement of said dip tube.
Claim 4
Dependent Claim
113 words
A dispenser comprising a container having an outlet, a dip tube in said container adapted to be aligned with said outlet, the outer surface of said dip tube and the inner surface of said container being serrated to form teeth, a piston slidably mounted on said dip tube, said piston including a flexible disc having an initially downturned concentric peripheral edges portion permitting initial movement of said piston upwardly during a filling operation, the inner and outer peripheral edges of the flexible disk engage the serrated teeth on the dip tube and inner surface of the wall, respectively, said concentric peripheral edges being turned upwardly upon initial downward movement of said dip tube.
Claim 5
Dependent Claim
19 words
A dispenser according to claim 1, including spring means for returning said dip tube to a raised initial position.
Claim 6
Dependent Claim
17 words
A dispenser according to claim 3, including guide means for the lower end of said dip tube.
Claim 7
Dependent Claim
20 words
A dispenser according to claim 1, wherein said container includes cylindrical member, and a base secured to said cylindrical member.
Claim 8
Dependent Claim
20 words
A dispenser according to claim 5, including guide means for the lower end of said dip tube on said base.
Claim 9
Dependent Claim
28 words
A dispenser according to claim 6, including spring means within said guide means and engageable with said tip tube to return said dip tube to an initial position.
Claim 10
Dependent Claim
33 words
A dispenser according to claim 1, wherein said piston includes a pair of rigid discs, a flexible washer between said discs, said flexible disc being secured to the uppermost of said rigid discs.
Claim 11
Dependent Claim
22 words
A dispenser according to claim 1, including a finger button at the top of said dip tube for depressing said dip tube.
Claim 12
Dependent Claim
29 words
A dispenser according to claim 7, wherein said guide means permits flow into the lower end of said dip tube and holds said dip tube centrally in said container.
Claim 13
Dependent Claim
18 words
A dispenser according to claim 1, including guide means for holding said dip tube centrally in said container.
Claim 14
Dependent Claim
18 words
A dispenser according to claim 11, including spring means for returning said dip tube to a raised position.
Claim 15
Dependent Claim
15 words
A dispenser according to claim 12, including finger button means for depressing said dip tube.
Claim 16
Dependent Claim
33 words
A dispenser according to claim 13, wherein said piston includes a pair or rigid discs, a flexible washer between said discs, said flexible disc being secured to the uppermost of said rigid discs.
Claim 17
Dependent Claim
33 words
A dispenser according to claim 7, wherein said piston includes a pair or rigid discs, a flexible washer between said discs, said flexible disc being secured to the uppermost of said rigid discs.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1987-12-11 | 1988-06-11 | 1988-12-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-12-11 | 1992-06-11 | 1992-12-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-12-11 | 1996-06-11 | 1996-12-11 | $7700.00 | Window Closed / Lapsed |