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US3850346A Expired / Lapsed US ⏱️ 0.0 years remaining

Hand squeezable, plural chambered, liquid dispenser

Assignee: Cambridge Research and Development Group
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Filing: 1972-04-10
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Granted: 1974-11-26
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Expires: 1992-04-10
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Abstract

Abstract A plural chambered dispenser for dispensing two liquids. One liquid is contained in an outer, flexible walled chamber. The other liquid is contained in a smaller, compressible chamber which is positioned within the outer chamber. First and second fluid actuated outlet valves are fluidly connected to the outer and inner chambers, respectively. The pressure generated by squeezing the outer flexible walled chamber is transmitted through the liquid in the outer chamber to the inner compressible chamber and to the liquid therein. The outer chamber outlet valve is opened by the action of the fluid, either liquid or gas, in the outer chamber. The inner chamber outlet valve is actuated in response to the actuation of the outer chamber outlet valve. In the preferred embodiment, the inner chamber outlet valve opens after and closes before the opening and closing, respectively, of the outer chamber outlet valve.

Inventors

  • 👤 J Richardson
  • 👤 H Groves

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-10-23 18:25
CPC Classifications
B; B65; B65D; B65D81/00; B65D81/32; B65D81/3216; B65D81/3227

Claims Analysis

Total Claims: 20
Claim 1
Independent Claim 149 words
A plural chambered dispenser for dispensing first and second liquids comprising: a first, flexible, chamber defining container adapted to contain the first liquid; a second, compressible, chamber defining container positioned within said first container and adapted to contain the second liquid, said second container having substantially no shape memory and a smaller volume than said first container whereby pressure exerted upon said first container is transmitted through the first liquid to said second container; a fluid actuated first outlet valve means fluidly coupled to said first container through a capillary tube; and, a second outlet valve means fluidly coupled to said second container through another capillary tube, said second outlet valve means being actuated in response to the actuation of said first valve means with the opening and closing of the second outlet valve means occurring after and before the opening and closing, respectively, of the first valve means.
Claim 2
Dependent Claim 149 words
A plural chambered dispenser for dispensing first and second liquids comprising: a first, flexible, chamber defining container adapted to contain the first liquid; a second, compressible, chamber defining container positioned within said first container and adapted to contain the second liquid, said second container having substantially no shape memory and a smaller volume than said first container whereby pressure exerted upon said first container is transmitted through the first liquid to said second container; a fluid actuated first outlet valve means fluidly coupled to said first container through a capillary tube; and, a second outlet valve means fluidly coupled to said second container through another capillary tube, said second outlet valve means being actuated in response to the actuation of said first valve means with the opening and closing of the second outlet valve means occurring after and before the opening and closing, respectively, of the first valve means.
Claim 3
Dependent Claim 184 words
A hand squeezable, plural chambered dispenser for dispensing first and second liquids comprising: a first, flexible, chamber defining container adapted to contain the first liquid; a second, compressible, chamber defining container positioned within said first container and adapted to contain the second liquid, said second container having a smaller volume than said first container whereby pressure exerted upon said first container is transmitted through the first liquid to said second container; a first, normally closed, outlet valve means fluidly coupled to said first container; diaphragm means in fluid pressure communication with said first chamber, said diaphragm means being operatively connected to said first outlet valve means whereby said valve means is opened when fluid pressure is exerted upon the diaphragm by squeezing the first container; a second, normally closed, outlet valve means fluidly coupled to said second container, said second outlet valve means being operatively connected to said diaphragm means to open when fluid pressure is exerted upon the diaphragm; and, means for varying the ratio of the volumes of the first and second liquids discharged through said first and second outlet valve means.
Claim 4
Dependent Claim 184 words
A hand squeezable, plural chambered dispenser for dispensing first and second liquids comprising: a first, flexible, chamber defining container adapted to contain the first liquid; a second, compressible, chamber defining container positioned within said first container and adapted to contain the second liquid, said second container having a smaller volume than said first container whereby pressure exerted upon said first container is transmitted through the first liquid to said second container; a first, normally closed, outlet valve means fluidly coupled to said first container; diaphragm means in fluid pressure communication with said first chamber, said diaphragm means being operatively connected to said first outlet valve means whereby said valve means is opened when fluid pressure is exerted upon the diaphragm by squeezing the first container; a second, normally closed, outlet valve means fluidly coupled to said second container, said second outlet valve means being operatively connected to said diaphragm means to open when fluid pressure is exerted upon the diaphragm; and, means for varying the ratio of the volumes of the first and second liquids discharged through said first and second outlet valve means.
Claim 5
Dependent Claim 27 words
The dispenser of claim 2 wherein said second outlet valve means opens after and closes before the opening and closing, respectively, of said first outlet valve means.
Claim 6
Dependent Claim 19 words
The dispenser of claim 2 wherein at least said first outlet valve means is pre-loaded in the closed position.
Claim 7
Dependent Claim 16 words
The dispenser of claim 2 wherein both said first and second outlet valve means are preloaded.
Claim 8
Dependent Claim 33 words
The dispenser of claim 2 further characterized by said first and second outlet valvE means discharging into a mixing chamber having an outlet through which the mixed first and second liquids are dispensed.
Claim 9
Dependent Claim 188 words
A hand squeezable, plural chambered dispenser for dispensing first and second liquids comprising: a first, flexible, chamber defining container adapted to contain the first liquid; a second, compressible, chamber defining container positioned within said first container and adapted to contain the second liquid, said second container having a smaller volume than said first container whereby pressure exerted upon said first container is transmitted through the first liquid to said second container; a first, normally closed, outlet valve means fluidly coupled to said first container through a capillary tube; diaphragm means in fluid pressure communication with said first chamber, said diaphragm means being operatively connected to said first outlet valve means whereby said valve means is opened when fluid pressure is exerted upon the diaphragm by squeezing the first container; a second, normally closed, outlet valve means fluidly coupled to said second container through a capillary tube, said second outlet valve means being operatively connected to said diaphragm means to open when fluid pressure is exerted upon the diaphragm; and, means for selectively preventing the opening of said second outlet valve when said first outlet valve means is actuated.
Claim 10
Dependent Claim 188 words
A hand squeezable, plural chambered dispenser for dispensing first and second liquids comprising: a first, flexible, chamber defining container adapted to contain the first liquid; a second, compressible, chamber defining container positioned within said first container and adapted to contain the second liquid, said second container having a smaller volume than said first container whereby pressure exerted upon said first container is transmitted through the first liquid to said second container; a first, normally closed, outlet valve means fluidly coupled to said first container through a capillary tube; diaphragm means in fluid pressure communication with said first chamber, said diaphragm means being operatively connected to said first outlet valve means whereby said valve means is opened when fluid pressure is exerted upon the diaphragm by squeezing the first container; a second, normally closed, outlet valve means fluidly coupled to said second container through a capillary tube, said second outlet valve means being operatively connected to said diaphragm means to open when fluid pressure is exerted upon the diaphragm; and, means for selectively preventing the opening of said second outlet valve when said first outlet valve means is actuated.
Claim 11
Dependent Claim 192 words
A hand squeezable, plural chambered dispenser for dispensing first and second liquids comprising: a first, flexible, chamber defining container adapted to contain the first liquid; a second, compressible, chamber defining container positioned within said first container and adapted to contain the second liquid, said second container having a smaller volume than said first container whereby pressure exerted upon said first container is transmitted through the first liquid to said second container; a first, normally closed, outlet valve means fluidly coupled to said first container through a capillary tube; diaphragm means in fluid pressure communication with said first chamber, said diaphragm means being operatively connected to said first outlet valve means whereby said valve means is opened when fluid pressure is exerted upon the diaphragm by squeezing the first container; a second, normally closed, outlet valve means fluidly coupled to said second container through a capillary tube, said second outlet valve means being operatively connected to said diaphragm means to open when fluid pressure is exerted upon the diaphragm; and, means for varying the ratio of the volumes of the first and second liquids discharged through said first and second outlet valve means.
Claim 12
Dependent Claim 192 words
A hand squeezable, plural chambered dispenser for dispensing first and second liquids comprising: a first, flexible, chamber defining container adapted to contain the first liquid; a second, compressible, chamber defining container positioned within said first container and adapted to contain the second liquid, said second container having a smaller volume than said first container whereby pressure exerted upon said first container is transmitted through the first liquid to said second container; a first, normally closed, outlet valve means fluidly coupled to said first container through a capillary tube; diaphragm means in fluid pressure communication with said first chamber, said diaphragm means being operatively connected to said first outlet valve means whereby said valve means is opened when fluid pressure is exerted upon the diaphragm by squeezing the first container; a second, normally closed, outlet valve means fluidly coupled to said second container through a capillary tube, said second outlet valve means being operatively connected to said diaphragm means to open when fluid pressure is exerted upon the diaphragm; and, means for varying the ratio of the volumes of the first and second liquids discharged through said first and second outlet valve means.
Claim 13
Dependent Claim 16 words
The dispenser of claim 8 wherein said second container is concentrically positioned within said first container.
Claim 14
Dependent Claim 21 words
The dispenser of claim 8 wherein said diaphragm means is preloaded when the first and second outlet valve means are closed.
Claim 15
Dependent Claim 165 words
A hand squeezable, plural chambered dispenser for dispensing first and second liquids comprising: a first, flexible, chamber defining container adapted to contain the first liquid; a second, compressible, chamber defining container positioned within said first container and adapted to contain the second liquid, said second container having substantially no shape memory and a smaller volume than said first container whereby pressure exerted upon said first container is transmitted through the first liquid to said second container; a first, normally closed, outlet valve means fluidly coupled to said first container; diaphragm means in fluid pressure communication with said first chamber, said diaphragm means being operatively connected to said first outlet valve means whereby said valve means is opened when fluid pressure is exerted upon the diaphragm by squeezing the first container; a second, normally closed, outlet valve means fluidly coupled to said second container, said second outlet valve means being operatively connected to said diaphragm means to open when fluid pressure is exerted upon the diaphragm.
Claim 16
Dependent Claim 165 words
A hand squeezable, plural chambered dispenser for dispensing first and second liquids comprising: a first, flexible, chamber defining container adapted to contain the first liquid; a second, compressible, chamber defining container positioned within said first container and adapted to contain the second liquid, said second container having substantially no shape memory and a smaller volume than said first container whereby pressure exerted upon said first container is transmitted through the first liquid to said second container; a first, normally closed, outlet valve means fluidly coupled to said first container; diaphragm means in fluid pressure communication with said first chamber, said diaphragm means being operatively connected to said first outlet valve means whereby said valve means is opened when fluid pressure is exerted upon the diaphragm by squeezing the first container; a second, normally closed, outlet valve means fluidly coupled to said second container, said second outlet valve means being operatively connected to said diaphragm means to open when fluid pressure is exerted upon the diaphragm.
Claim 17
Dependent Claim 20 words
The dispenser of claim 11 further characterized by a unidirectional air return valve means fluidly coupled to said first container.
Claim 18
Dependent Claim 31 words
The dispenser of claim 12 further characterized by means for varying the ratio of the volumes of the first and second fluid dispensed through said first and second outlet valve means.
Claim 19
Dependent Claim 15 words
The dispenser of claim 12 wherein at least said first outlet valve means is preloaded.
Claim 20
Dependent Claim 27 words
The dispenser of claim 12 further characterized by means for selectively preventing the opening of said second outlet valve when said first outlet valve means is actuated.

References Cited (Backward Citations)

US2876935A Cited
US3217931A Cited
US3506005A Cited
US3508682A Cited
US3587937A Cited

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1977-11-25 1978-05-27 1978-11-26 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1981-11-25 1982-05-27 1982-11-26 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1985-11-25 1986-05-27 1986-11-26 $7700.00 Window Closed / Lapsed

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