Patent US4029236A successfully refreshed from Google Patents.
US4029236A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Two product dispenser with cooperating telescoping cylinders
Assignee: Colgate Palmolive Co
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Filing: 1976-05-17
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Granted: 1977-06-14
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Expires: 1996-05-17
Abstract
Abstract A product dispenser for dispensing two products simultaneously comprising a first cylinder having a first product therein and having an end wall. The end wall has a tongue and groove joint with the first cylinder. The first cylinder is provided with a piston plate therein and the first cylinder in turn forms the piston of a second product therein. The parts are so arranged that movement of the first cylinder relative to the second cylinder will actuate the piston plate as well as discharge both products.
Inventors
- 👤 John C. Carson, Jr.
- 👤 Robert T. Hall
- 👤 Divaker B. Kenkare
- 👤 Clarence R. Robbins
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 20:06
CPC Classifications
B; B65; B65D; B65D81/00; B65D81/32; B65D81/325; F; F04; F04B; F04B13/00; F04B13/02; F04B3/00; F04B3/003; G; G01; G01F; G01F11/00; G01F11/02; G01F11/021
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
136 words
A product dispenser comprising a first cylinder having an end wall, a piston plate in said cylinder having hollow piston rod extending slidably through said end wall for communicating and dispensing the contents of said cylinder outwardly of said cylinder, a second cylinder having a forward wall provided with a delivery tube therein and a vent tube communicating with the interior of said first cylinder, said first cylinder functioning as a piston for said second cylinder, said piston rod being fixedly secured to said forward wall so that movement of said end wall toward said forward wall will move said piston plate away from said end wall to force a first product in said first cylinder outwardly through said piston rod and to force a second product in said second cylinder out through said delivery tube.
Claim 2
Dependent Claim
136 words
A product dispenser comprising a first cylinder having an end wall, a piston plate in said cylinder having hollow piston rod extending slidably through said end wall for communicating and dispensing the contents of said cylinder outwardly of said cylinder, a second cylinder having a forward wall provided with a delivery tube therein and a vent tube communicating with the interior of said first cylinder, said first cylinder functioning as a piston for said second cylinder, said piston rod being fixedly secured to said forward wall so that movement of said end wall toward said forward wall will move said piston plate away from said end wall to force a first product in said first cylinder outwardly through said piston rod and to force a second product in said second cylinder out through said delivery tube.
Claim 3
Dependent Claim
17 words
A product dispenser according to claim 1, said end wall being detachably connected to said first cylinder.
Claim 4
Dependent Claim
20 words
A product dispenser according to claim 2, including tongue and groove connection between said end wall and said first cylinder.
Claim 5
Dependent Claim
31 words
A product dispenser according to claim 3, including a T-shaped seal forming a piston ring between said piston plate and said first cylinder and said first cylinder and said second cylinder.
Claim 6
Dependent Claim
30 words
A product dispenser according to claim 4, wherein said T-shape seal between said first cylinder and said second cylinder overlies the joint between said end wall and said first cylinder.
Claim 7
Dependent Claim
13 words
A product dispenser according to claim 1, wherein said vent tube is flexible.
Claim 8
Dependent Claim
14 words
A product dispenser according to claim 1, wherein said product delivery tubes are flexible.
Claim 9
Dependent Claim
17 words
A product dispenser according claim 1, wherein said product delivery tubes discharge into a common mixing area.
Claim 10
Dependent Claim
32 words
A product dispenser according to claim 1, wherein said pistons are selectively of different sizes to allow for the dispensing of products contained in each of the said cylinders at different ratios.
Claim 11
Dependent Claim
17 words
A product dispenser according to claim 1, wherein said piston rod is concentric with said vent tube.
References Cited (Backward Citations)
US1926367A
Cited
FR776150A
Cited
US2655289A
Cited
US2826339A
Cited
US2915225A
Cited
US3208645A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-06-13 | 1980-12-13 | 1981-06-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-06-13 | 1984-12-13 | 1985-06-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-06-13 | 1988-12-13 | 1989-06-14 | $7700.00 | Window Closed / Lapsed |