US3926349A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Valve construction for a pressure operated container
Assignee: Individual
•
Filing: 1974-03-28
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Granted: 1975-12-16
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Expires: 1994-03-28
Abstract
Abstract The invention contemplates valve structure for a pressurized container, for selective dispensing of viscous foods or other products. The valve parts per se coact with a supporting formation in the container, such that pressure within the container always develops seal-enhancing engagements both to the container and to a valve member, as long as product remains to be dispensed. The invention also lends itself to combination with a selectively removable protection screw cap, in such manner that both seal engagements are further enhanced by cap application.
Inventors
- 👤 Robert S Schultz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 09:36
CPC Classifications
B; B65; B65D; B65D83/00; B65D83/14; B65D83/60; B65D83/64
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
163 words
In combination, for use in a pressurized container, a rigid centrally apertured container closure member having a substantial conical taper in the direction of the aperture, an elastomeric bushing fitted to the concave taper and extending through the aperture, the lower end of said bushing being in axial proximity to the bushing fit to said taper, said bushing having a central longitudinal bore extending axially through the aperture region of the closure member, and a tiltable valve member having a substantially flat seating surface seated in axial abutment with said lower end of said bushing and including a cylindrical dispensing stem fitted to and extending through and beyond the outer end of the bore of the bushing; whereby in the presence of internal pressure within a container of which said closure member forms a part, said valve member and bushing are pressure-loaded against the convergenT taper, thus enhancing seal engagement of said bushing to said taper and of said bushing to said stem.
Claim 2
Dependent Claim
163 words
In combination, for use in a pressurized container, a rigid centrally apertured container closure member having a substantial conical taper in the direction of the aperture, an elastomeric bushing fitted to the concave taper and extending through the aperture, the lower end of said bushing being in axial proximity to the bushing fit to said taper, said bushing having a central longitudinal bore extending axially through the aperture region of the closure member, and a tiltable valve member having a substantially flat seating surface seated in axial abutment with said lower end of said bushing and including a cylindrical dispensing stem fitted to and extending through and beyond the outer end of the bore of the bushing; whereby in the presence of internal pressure within a container of which said closure member forms a part, said valve member and bushing are pressure-loaded against the convergenT taper, thus enhancing seal engagement of said bushing to said taper and of said bushing to said stem.
Claim 3
Dependent Claim
30 words
The combination of claim 1, in which said closure member is the integral frusto-conical top-end wall of a cylindrical container which is open at its other end, for bottom-fill application.
Claim 4
Dependent Claim
32 words
The combination of claim 1, in which said closure member is a circular end-wall member having peripheral formations adapted for assembly to a container open at its top end, for top-fill application.
Claim 5
Dependent Claim
25 words
The combination of claim 1, in which said bushing has a conically tapering formation adapted to circumferentially continuously extensively and yieldingly engage said closure taper.
Claim 6
Dependent Claim
27 words
The combination of claim 4, in which the unstressed taper of said bushing is at a greater included angle than that of the taper of said closure.
Claim 7
Dependent Claim
25 words
The combination of claim 1, in which said bushing has a reduced circumferential waist at which it is received in the aperture of said closure.
Claim 8
Dependent Claim
34 words
The combination of claim 1, in which said stem includes a radially outward flange by which it locates against the axially outer end of said bushing, said stem projecting axially outwardly beyond said flange.
Claim 9
Dependent Claim
52 words
The combination of claim 1, in which said stem projects axially beyond the axially outer end of said bushing, and a protective cover cap having removable threaded engagement with the projecting part of said stem, said cap having a skirt extending into abutment with said closure member when secured to said stem.
Claim 10
Dependent Claim
28 words
The combination of claim 8, in which said threaded engagement is between said stem and an inner downwardly projecting tubular projection from the closed end of said cap.
Claim 11
Dependent Claim
39 words
The combination of claim 8, in which said threaded engagement involves an array of axially and angularly spaced bumps on one of said cap and stem and a continuous thread on the other one of said cap and stem.
Claim 12
Dependent Claim
13 words
The combination of claim 10, in which said bumps and thread are rounded.
Claim 13
Dependent Claim
13 words
The combination of claim 10, in which said bumps and thread are wedge-shaped.
Claim 14
Dependent Claim
24 words
The combination of claim 1, in which the durometer hardness of the material of said bushing is selected in the range 40 to 80.
Claim 15
Dependent Claim
18 words
The combination of claim 1, in which the durometer of the material of said bushing is approximately 60.
Claim 16
Dependent Claim
60 words
The combination of claim 1, in which said bushing includes a circumferentially continuous radially outward flange of greater unstressed included angle than the included angle of the taper of said closure member, said bushing being in such assembled relation to said closure member that said flange is resiliently deflected into substantial conical conformance with the included angle of said taper.
Claim 17
Dependent Claim
36 words
The combination of claim 1, in which the effective area of said flat seating surface is of at least substantially the sectional area of said bushing at its location within the aperture of said closure member.
References Cited (Backward Citations)
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Cited
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US2852168A
Cited
US3095127A
Cited
US3269615A
Cited
US3318484A
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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) | 1978-12-15 | 1979-06-16 | 1979-12-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-12-15 | 1983-06-16 | 1983-12-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-12-15 | 1987-06-16 | 1987-12-16 | $7700.00 | Window Closed / Lapsed |