US4964540A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pressurized fluid dispenser and method of making the same
Assignee: Power Container Corp
•
Filing: 1989-11-13
•
Granted: 1990-10-23
•
Expires: 2009-11-13
Abstract
Abstract In a dispenser of the kind used for dispensing a fluid by applying pressure on a container, a bag assembly is provided with a tubular pleated bag, a ribbed coating being formed over the bag by dipping. After the bag is selectively discharged causing the bag to collapse, the bag folds along the pleats under the influence of the coating until substantially all of the fluid has been removed. The assembly is made by forming the bag into a pleated shape and then dipping the bag into a suitable material to form a coating with beads. After the coating dries the bag is inserted into the energy tube.
Inventors
- 👤 Hyman Katz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 11:14
CPC Classifications
B; B65; B65D; B65D83/00; B65D83/771; B65D83/7711
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
119 words
An apparatus for containing and dispensing a pressurized fluid, comprising: an expandable bag having a generally cylindrical shaped outer wall, said bag having a closed end and an open end, said outer wall including a plurality of substantially longitudinal pleats, said pleats defining a plurality of peaks and valleys; valve means coupled with said open end for selectively releasing the contents of the bag; an expandable energy tube substantially surrounding said bag for maintaining pressure on the bag and its contents; a plurality of expandable longitudinal ribs disposed in said valleys of said pleats and at least partially filing said valleys, said longitudinal ribs controlling refolding of the pleats in the bag as fluid is released from the bag.
Claim 2
Independent Claim
119 words
An apparatus for containing and dispensing a pressurized fluid, comprising: an expandable bag having a generally cylindrical shaped outer wall, said bag having a closed end and an open end, said outer wall including a plurality of substantially longitudinal pleats, said pleats defining a plurality of peaks and valleys; valve means coupled with said open end for selectively releasing the contents of the bag; an expandable energy tube substantially surrounding said bag for maintaining pressure on the bag and its contents; a plurality of expandable longitudinal ribs disposed in said valleys of said pleats and at least partially filing said valleys, said longitudinal ribs controlling refolding of the pleats in the bag as fluid is released from the bag.
Claim 3
Dependent Claim
22 words
An apparatus in accordance with claim 1 wherein said longitudinal pleats extend from adjacent said open end to adjacent said closed end.
Claim 4
Dependent Claim
20 words
An apparatus in accordance with claim 1 wherein each said longitudinal rib is latex, prevulcanized natural rubber, or synthetic isoprene.
Claim 5
Dependent Claim
16 words
An apparatus in accordance with claim 1 including an enclosure into which said bag is inserted.
Claim 6
Dependent Claim
33 words
An apparatus in accordance with claim 1 wherein said plurality of longitudinal ribs is formed by coating said bag such that said coating forms longitudinal ribs filling the bottom of said pleat valleys.
Claim 7
Dependent Claim
28 words
An apparatus in accordance with claim 1 wherein an inner diameter of said energy tube is smaller than an outer diameter defined by pleat crests in said bag.
Claim 8
Independent Claim
199 words
An apparatus for containing and dispensing a pressurized fluid, comprising: an enclosure; an expandable bag inserted in said enclosure, the bag comprising a generally cylindrically shaped outer wall, said outer wall having a closed end and an open end, said open end defining a mouth through which the fluid may pass, the outer wall of the bag having a plurality of pleats extending from adjacent the mouth to adjacent the closed end such that the bag may be expanded from a contracted pleated position to an expanded position when the fluid is introduced into the bag, said plurality of pleats defining a plurality of peaks and valleys; a cap secured to said mouth and including a central orifice; valve means disposed in the central orifice of the cap for selectively releasing said pressurized fluid; an energy tube for maintaining pressure on the bag and said fluid, said energy tube surrounding the bag and extending longitudinally from adjacent said mouth to adjacent said closed end; an expandable longitudinal rib disposed in the bottom of each of said valleys and at least partially filling each of said valleys for controlling refolding of the pleats as fluid in said bag is removed.
Claim 9
Independent Claim
199 words
An apparatus for containing and dispensing a pressurized fluid, comprising: an enclosure; an expandable bag inserted in said enclosure, the bag comprising a generally cylindrically shaped outer wall, said outer wall having a closed end and an open end, said open end defining a mouth through which the fluid may pass, the outer wall of the bag having a plurality of pleats extending from adjacent the mouth to adjacent the closed end such that the bag may be expanded from a contracted pleated position to an expanded position when the fluid is introduced into the bag, said plurality of pleats defining a plurality of peaks and valleys; a cap secured to said mouth and including a central orifice; valve means disposed in the central orifice of the cap for selectively releasing said pressurized fluid; an energy tube for maintaining pressure on the bag and said fluid, said energy tube surrounding the bag and extending longitudinally from adjacent said mouth to adjacent said closed end; an expandable longitudinal rib disposed in the bottom of each of said valleys and at least partially filling each of said valleys for controlling refolding of the pleats as fluid in said bag is removed.
Claim 10
Dependent Claim
36 words
An apparatus in accordance with claim 7 wherein said longitudinal ribs are formed by dipping said bag in latex such that said coating form longitudinal ribs which fills the bottom of each of said pleat valleys.
Claim 11
Dependent Claim
14 words
An apparatus in accordance with claim 7 wherein said coating is a latex material.
Claim 12
Dependent Claim
17 words
An apparatus in accordance with claim 9 wherein said latex material comprises 5 gram dry weight latex.
References Cited (Backward Citations)
US2816690A
Cited
US2804995A
Cited
US2966282A
Cited
US3083871A
Cited
US3157314A
Cited
US3087655A
Cited
US3323206A
Cited
US3421661A
Cited
US3552604A
Cited
US3556186A
Cited
US3580427A
Cited
US3727803A
Cited
US3721371A
Cited
US3767078A
Cited
US3907169A
Cited
US3733309B1
Cited
US3733309A
Cited
US3791098A
Cited
US3738538A
Cited
US3672543A
Cited
US3745150A
Cited
US3803275A
Cited
US3731854A
Cited
US3745149A
Cited
US3791557A
Cited
US3796356A
Cited
US3876115A
Cited
DE2304538A1
Cited
US3940026A
Cited
DE2442328A1
Cited
AU7631274A
Cited
US3946905A
Cited
US3961725A
Cited
US3981415A
Cited
US4067499A
Cited
US4052866A
Cited
US4251032A
Cited
DE2704013A1
Cited
US4098433A
Cited
US4077543A
Cited
US4121731A
Cited
AU4031278A
Cited
US4203440A
Cited
US4222499A
Cited
WO1981001143A1
Cited
WO1982000780A1
Cited
US4423829A
Cited
US4387833A
Cited
US4492313A
Cited
US4626235A
Cited
US4701120A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1993-10-22 | 1994-04-23 | 1994-10-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-10-22 | 1998-04-23 | 1998-10-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-10-22 | 2002-04-23 | 2002-10-23 | $7700.00 | Window Closed / Lapsed |