US3581941A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pressurized container
Assignee: Sterigard Corp
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Filing: 1969-09-26
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Granted: 1971-06-01
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Expires: 1989-09-26
Abstract
Abstract The pressurized container has a cylindrical rigid body closed at its top and bottom. A flexible, elastic bag is disposed within the container with its top clamped by a seam formed between the body and a covering cap. The flexible bag has a sealed end proximate the bottom of the body which is arched, with the apex of the arch being at the centerline of the body and with the arch''s sides extending down towards the bottom of the body. The space between the bottom of the container and the arch provides a volume for charging the container with a propellant. A dispensing valve is attached to the cap in communication with the interior of the bag on the other side of the propellant chamber.
Inventors
- 👤 John K Bruce
- 👤 Theodore R Bruce
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 22:17
CPC Classifications
B; B65; B65D; B65D83/00; B65D83/14; B65D83/38; B65D83/60; B65D83/62; B65D2231/00; B65D2231/001; B65D2231/004
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
363 words
An improvement in a container for dispensing pressurized fluid products comprising: a. a rigid, right cylindrical, hollow body portion having a right cylindrical interior wall; b. a bottom portion closing the bottom of the body portion; c. a cover seamed to the top of the body portion, the cover being adapted to mount a selectively actuatable dispensing valve in fluid product communication with the interior of the body portion; d. valve means on the bottom portion disposed on the longitudinal axis of the container for allowing a propellant injection needle to pass into the hollow interior of the body portion to inject a propellant therein and for sealing the hollow interior of the body portion after the injection needle is withdrawn; and e. an elastic, flexible bag disposed within the body portion, the bag having a sealed end proximate the bottom portion and an open end proximate the cover, the sealed end defining a straight line before disposal in the body portion, the open end of the bag being clamped between the top of the body portion and the cover in the seam such that the interior of the bag faces The top portion and defines a product volume for a fluid product to be dispensed, the sealed end of the bag being arched, the apex of the arch crossing the longitudinal axis of the container and being spaced from the valve means on the bottom portion to provide a space between the bag and the bottom portion for a propellant injection needle, the sides of the arch extending from the apex towards the bottom portion to define a propellant chamber between the bottom portion and the exterior of the arch and product volumes bordered by the interior surface of the sides of the arch and the interior surface of the bag radially of the sides of the arch, the bag at least between about the apex of the arch and its open end being contiguous with the interior wall of the body portion, the bag, including the arch, being capable of collapsing towards the longitudinal axis of the dispenser as a fluid product in the product volume is discharged from the dispenser.
Claim 2
Dependent Claim
363 words
An improvement in a container for dispensing pressurized fluid products comprising: a. a rigid, right cylindrical, hollow body portion having a right cylindrical interior wall; b. a bottom portion closing the bottom of the body portion; c. a cover seamed to the top of the body portion, the cover being adapted to mount a selectively actuatable dispensing valve in fluid product communication with the interior of the body portion; d. valve means on the bottom portion disposed on the longitudinal axis of the container for allowing a propellant injection needle to pass into the hollow interior of the body portion to inject a propellant therein and for sealing the hollow interior of the body portion after the injection needle is withdrawn; and e. an elastic, flexible bag disposed within the body portion, the bag having a sealed end proximate the bottom portion and an open end proximate the cover, the sealed end defining a straight line before disposal in the body portion, the open end of the bag being clamped between the top of the body portion and the cover in the seam such that the interior of the bag faces The top portion and defines a product volume for a fluid product to be dispensed, the sealed end of the bag being arched, the apex of the arch crossing the longitudinal axis of the container and being spaced from the valve means on the bottom portion to provide a space between the bag and the bottom portion for a propellant injection needle, the sides of the arch extending from the apex towards the bottom portion to define a propellant chamber between the bottom portion and the exterior of the arch and product volumes bordered by the interior surface of the sides of the arch and the interior surface of the bag radially of the sides of the arch, the bag at least between about the apex of the arch and its open end being contiguous with the interior wall of the body portion, the bag, including the arch, being capable of collapsing towards the longitudinal axis of the dispenser as a fluid product in the product volume is discharged from the dispenser.
Claim 3
Dependent Claim
56 words
The improvement claimed in claim 1 wherein the apex of the arch extends as a line laterally across the seam, each side of the arch being generally triangular in shape with the apex at the base of the triangular sides and the seam extending generally normal to the apex to the tips of the triangular sides.
Claim 4
Dependent Claim
97 words
The improvement claimed in claim 2 wherein the seamed connection between the top of the body portion and the cover is formed by interlocking the two with a reverse bend of the top of the body and a double reverse bend of the edge of the cover, the open end of the bag being sandwiched between the edge of the cover and the top of the body for the full circumferential extent of the seamed connection so that the open end of the bag lies in direct tensioned contact with the unbent exterior surface of the body.
Claim 5
Dependent Claim
36 words
The improvement claimed in claim 2 wherein a portion of the bag extends from the seam joining the cover and the body portion down the exterior surface of the body portion is direct tensioned contact therewith.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-05-31 | 1974-11-30 | 1975-06-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-05-31 | 1978-11-30 | 1979-06-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-05-31 | 1982-11-30 | 1983-06-01 | $7700.00 | Window Closed / Lapsed |