Patent US4785949A successfully refreshed from Google Patents.
US4785949A
Expired / Lapsed
US
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Base configuration for an internally pressurized container
Assignee: Graham Packaging Pet Technologies Inc
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Filing: 1987-12-11
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Granted: 1988-11-22
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Expires: 2007-12-11
Abstract
Abstract This relates to the base configuration of a biaxially oriented blow molded thermoplastic resin container. It has been found that by assigning more space to the ribs between adjacent legs and feet, during the blow molding of a preform, there is proportionally less thinning of the material of the preform in accordance with the greater width of rib, thereby providing greater strength in the high stress area of the base structure with a resultant lesser failure due to stress cracking.
Inventors
- 👤 Suppayan M. Krishnakumar
- 👤 Wayne N. Collette
- 👤 Bryan H. Miller
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 21:27
CPC Classifications
B; B65; B65D; B65D1/00; B65D1/02; B65D1/0223; B65D1/0261; B65D1/0284
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
99 words
A base configuration for an internally pressurized container, said base configuration being generally circular in outline and comprising a maximum of five radiating legs each terminating in a foot recessed radially inwardly of the circular outline of said base configuration, and said legs being separated by a radially extending rib, said base configuration being improved by said legs and feet being generally of the same outline of ribs and legs in a base configuration having six legs and feet and said ribs being of a greater width than like ribs in a base configuration having six legs and feet.
Claim 2
Dependent Claim
99 words
A base configuration for an internally pressurized container, said base configuration being generally circular in outline and comprising a maximum of five radiating legs each terminating in a foot recessed radially inwardly of the circular outline of said base configuration, and said legs being separated by a radially extending rib, said base configuration being improved by said legs and feet being generally of the same outline of ribs and legs in a base configuration having six legs and feet and said ribs being of a greater width than like ribs in a base configuration having six legs and feet.
Claim 3
Dependent Claim
21 words
A base configuration according to claim 1 wherein each rib has a wall thickness proportional to the width of said rib.
Claim 4
Dependent Claim
32 words
A base configuration according to claim 1 wherein each rib has a wall thickness proportional to the width of said rib with the greater the rib width the greater the rib thickness.
Claim 5
Dependent Claim
22 words
A base configuration according to claim 1 wherein the angular extent of each rib is on the order of 30° and greater.
Claim 6
Dependent Claim
20 words
A base configuration according to claim 1 wherein said ribs have a configuration generally forming a portion of a hemisphere.
Claim 7
Dependent Claim
25 words
A base configuration according to claim 1 wherein said legs are five in number and the angular extent of each of said legs is ≧40°.
Claim 8
Dependent Claim
41 words
A base configuration according to claim 1 wherein said legs are five in number and the angular extent of each of said legs is on the order of 40° providing an angular extent of said rib on the order of 32°.
Claim 9
Dependent Claim
40 words
A base configuration according to claim 1 wherein each foot has radially outer corners and the spacing of each such corner from the center of said base being on the order of 80% of the diameter of said base configuration.
Claim 10
Dependent Claim
64 words
A base configuration for an internally pressurized container, said base configuration being generally circular in outline and comprising five radiating legs each terminating in a foot recessed radially inwardly of the circular outline of said base configuration and said legs being separated by a radially extending rib, said base configuration being improved by each rib having an angular extent on the order of 30°.
Claim 11
Dependent Claim
64 words
A base configuration for an internally pressurized container, said base configuration being generally circular in outline and comprising five radiating legs each terminating in a foot recessed radially inwardly of the circular outline of said base configuration and said legs being separated by a radially extending rib, said base configuration being improved by each rib having an angular extent on the order of 30°.
Claim 12
Dependent Claim
32 words
A base configuration according to claim 9 wherein said legs each have an angular extent on the order of 40° providing an angular extent of said ribs on the order of 32°.
Claim 13
Dependent Claim
20 words
A base configuration according to claim 9 wherein said ribs have a configuration generally forming a portion of a hemisphere.
Claim 14
Dependent Claim
40 words
A base configuration according to claim 9 wherein each foot has radially outer corners and the spacing of each such corner from the center of said base being on the order of 80% of the diameter of said base configuration.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1991-11-22 | 1992-05-23 | 1992-11-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-11-22 | 1996-05-23 | 1996-11-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-11-22 | 2000-05-23 | 2000-11-22 | $7700.00 | Window Closed / Lapsed |