US3979025A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Devices for holding and discharging liquid and paste-like substances under pressure
Assignee: Individual
•
Filing: 1975-07-24
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Granted: 1976-09-07
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Expires: 1995-07-24
Abstract
Abstract Dual-chamber pressurized dispensers for a variety of products. A flexible inner container defines one chamber in which the product to be dispensed is contained, the inner container being connected at one end to a dispensing valve. A rigid outer container encloses the flexible inner container and therebetween defines another chamber in which a pressurizing propellant is contained. Each inner container is designed to achieve high expulsion efficiency, with an upper portion having a lipped aperture in which the dispensing valve is received and a lower portion having longitudinal stiffening ribs.
Inventors
- 👤 Richard Friedrich
- 👤 Frank A. E. Rindelaub
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 13:30
CPC Classifications
B; B65; B65D; B65D83/00; B65D83/14; B65D83/60; B65D83/62
Claims Analysis
Total Claims: 30
Claim 1
Independent Claim
106 words
In a dual-chamber pressurized dispenser comprising an outer container having an opening; an inner container disposed within said outer container and having an opening; a retaining member connecting said outer and inner containers at their respective openings; a dispensing valve secured in the opening of said inner container by said retaining member; and a predetermined quantity of pressurizing propellant between said inner and outer containers, the improvement comprising: a plurality of hollow, product-containing longitudinal stiffening rib means formed in said inner container and operative to prevent the formation of pockets of entrapped product during the collapsing of said inner container radially inwardly toward its longitudinal axis.
Claim 2
Dependent Claim
106 words
In a dual-chamber pressurized dispenser comprising an outer container having an opening; an inner container disposed within said outer container and having an opening; a retaining member connecting said outer and inner containers at their respective openings; a dispensing valve secured in the opening of said inner container by said retaining member; and a predetermined quantity of pressurizing propellant between said inner and outer containers, the improvement comprising: a plurality of hollow, product-containing longitudinal stiffening rib means formed in said inner container and operative to prevent the formation of pockets of entrapped product during the collapsing of said inner container radially inwardly toward its longitudinal axis.
Claim 3
Dependent Claim
23 words
A dual-chamber pressurized dispenser according to claim 1, wherein said inner container is formed of metal and has a chemically inert interior coating.
Claim 4
Dependent Claim
37 words
A dual-chamber pressurized dispenser according to claim 1, wherein said inner container comprises a tapered portion in which said opening is formed, and a flared lip which is compressed between said retaining member and said outer container.
Claim 5
Dependent Claim
52 words
A dual-chamber pressurized dispenser according to claim 3, wherein said inner container comprises a truncated conical portion dependant from said tapered portion, each of said longitudinal stiffening rib means being dependent from said truncated conical portion and joined by intermediate linking sections to form an extended lower portion having a closed end.
Claim 6
Dependent Claim
43 words
A dual-chamber pressurized dispenser according to claim 3, wherein said inner container comprises a generally cylindrical portion dependant from said tapered portion and having a closed end, each of said longitudinal stiffening rib means extending over the length of said generally cylindrical portion.
Claim 7
Dependent Claim
57 words
A dual-chamber pressurized dispenser according to claim 5, wherein each of said longitudinal stiffening rib means has first and second opposed side walls extending radially outwardly from said generally cylindrical portion, a substantially flat outer wall connecting said opposed side walls, and first and second opposed end walls connecting said opposed side walls and said outer wall.
Claim 8
Dependent Claim
20 words
A dual-chamber pressurized dispenser according to claim 3, wherein said tapered portion is in the form of a truncated dome.
Claim 9
Dependent Claim
20 words
A dual-chamber pressurized dispenser according to claim 3, wherein said tapered portion is in the form of a truncated cone.
Claim 10
Dependent Claim
28 words
A dual-chamber pressurized dispenser according to claim 1, wherein said inner container comprises a radially-extended collar portion for stiffening said inner container in the region of said opening.
Claim 11
Dependent Claim
82 words
A dual-chamber pressurized dispenser according to claim 9, wherein said inner container comprises a flared lip which is compressed between said retaining member and said outer container, a first collar portion dependant from said flared lip, a beaded portion dependant from said first collar portion, said radially-extended collar portion being dependant from said beaded portion, and a generally cylindrical portion in which each of said longitudinal stiffening rib means is formed dependant from said radially-extended collar portion and having a closed end.
Claim 12
Dependent Claim
31 words
A dual-chamber pressurized dispenser according to claim 9, wherein each of said longitudinal stiffening rib means is relatively narrow in comparison with the intermediate linking segments of said generally cylindrical portion.
Claim 13
Dependent Claim
28 words
A dual-chamber pressurized dispenser according to claim 11, wherein each of said longitudinal stiffening rib means extends over less than the entire length of said generally cylindrical portion.
Claim 14
Dependent Claim
43 words
A dual-chamber pressurized dispenser according to claim 11, wherein each of said longitudinal stiffening rib means is gradually faired into said generally cylindrical portion near its closed end and sharply faired into said generally cylindrical portion near said opening in said inner container.
Claim 15
Dependent Claim
28 words
A dual-chamber pressurized dispenser according to claim 1, wherein said inner container is formed of a plastic selected from the group consisting of polyethylene, polypropylene, nylon and PERLON.
Claim 16
Dependent Claim
57 words
An inner container for a dual-chamber pressurized dispenser comprising an upper portion having an opening therein, and a lower portion having a closed end and a plurality of hollow, product-containing longitudinal stiffening rib means operative to prevent the formation of pockets of entrapped product during the collapsing of said inner container radially inwardly toward its longitudinal axis.
Claim 17
Dependent Claim
57 words
An inner container for a dual-chamber pressurized dispenser comprising an upper portion having an opening therein, and a lower portion having a closed end and a plurality of hollow, product-containing longitudinal stiffening rib means operative to prevent the formation of pockets of entrapped product during the collapsing of said inner container radially inwardly toward its longitudinal axis.
Claim 18
Dependent Claim
22 words
An inner container according to claim 15, wherein said upper portion is tapered and has a flared lip extending about said opening.
Claim 19
Dependent Claim
38 words
An inner container according to claim 16, comprising a truncated conical portion dependant from said tapered upper portion, each of said longitudinal stiffening rib means being dependant from said truncated conical portion and joined by intermediate linking sections.
Claim 20
Dependent Claim
36 words
An inner container according to claim 16, wherein each of said longitudinal stiffening rib means extends over the length of said lower portion and said plurality of longitudinal stiffening rib means is interconnected by curved segments.
Claim 21
Dependent Claim
55 words
An inner container according to claim 18, wherein each of said longitudinal stiffening rib means has first and second opposed side walls extending radially outward from said curved segments, a substantially flat outer wall converting said opposed side walls, and first and second opposed end walls connecting said opposed side walls and said outer wall.
Claim 22
Dependent Claim
20 words
An inner container according to claim 16, wherein said tapered upper portion is in the form of a truncated dome.
Claim 23
Dependent Claim
20 words
An inner container according to claim 16, wherein said tapered upper portion is in the form of a truncated cone.
Claim 24
Dependent Claim
23 words
An inner container according to claim 15, comprising a radially-extended collar portion for stiffening said inner container in the region of said opening.
Claim 25
Dependent Claim
51 words
An inner container according to claim 22, comprising a flared lip, a first collar portion dependant from said flared lip, a beaded portion dependent from said collar portion, said radially-extended collar portion being dependant from said beaded portion, said lower portion being generally cylindrical and dependant from said radially-extended collar portion.
Claim 26
Dependent Claim
30 words
An inner container according to claim 23, wherein each of said longitudinal stiffening rib means is relatively narrow in comparison with the intermediate areas of said generally cylindrical lower portion.
Claim 27
Dependent Claim
28 words
An inner container according to claim 24, wherein each of said longitudinal stiffening rib means extends over less than the entire length of said generally cylindrical lower portion.
Claim 28
Dependent Claim
41 words
An inner container according to claim 25, wherein each of said longitudinal stiffening rib means is gradually faired into said generally cylindrical lower portion near said closed end and are sharply faired into said generally cylindrical lower portion near said opening.
Claim 29
Dependent Claim
22 words
An inner container according to claim 15, wherein said inner container is formed of metal and has a chemically inert interior coating.
Claim 30
Dependent Claim
27 words
An inner container according to claim 15, wherein said inner container is formed of a plastic selected from the group consisting of polyethylene, polypropylene, nylon and PERLON.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-09-07 | 1980-03-08 | 1980-09-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-09-07 | 1984-03-08 | 1984-09-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-09-07 | 1988-03-08 | 1988-09-07 | $7700.00 | Window Closed / Lapsed |