Patent US1189194A successfully refreshed from Google Patents.
Patent US3749543A successfully refreshed from Google Patents.
US3749543A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for forming belled pipe couplings
Assignee: ASC Industries Inc
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Filing: 1971-06-21
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Granted: 1973-07-31
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Expires: 1991-06-21
Abstract
Abstract An apparatus for forming a plastic pipe bell end of predetermined inner configuration including a peripheral groove for receiving a sealing gasket. The apparatus includes a segmented die having four axial members and a center core element. The die is inserted into the heated end of a length of plastic pipe to permit the pipe to be molded about the die in the desired configuration. After cooling of the pipe, the core element is removed and the axial members are disassembled within the pipe and retracted. The disclosed method relates to the insertion of the die having the desired interior pipe configuration, the cooling of the pipe about the die, and the progressive removal of the core and die elements.
Inventors
- 👤 P Stansbury
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 21:34
CPC Classifications
B; B29; B29C; B29C57/00; B29C57/02; Y; Y10; Y10S; Y10S425/00; Y10S425/218
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
179 words
In an apparatus for belling the ends of plastic pipe having a central pipe axis, a die comprising: a longitudinal core element centered about a longitudinal die axis adapted to be coaxial with the pipe axis of a pipe end to be belled, said core element having exterior outwardly facing longitudinal surface areas parallel to the die axis; a plurality of radial segmented die members arranged circumferentially about the core element and supported, when assembled, by engagement of the outwardly facing longitudinal surface areas of the core element, the die members extending longitudinally coextensive with one another and having complementary outer surfaces which when assembled about the core element, define cylindrical surface configurations centered about the die axis and complementary to the desired inner surface configuration of the belled pipe end; said core element being longitudinally removable from within the assembled die members; one of said die members being radially movable between the die members to each side thereof following removal of the core element, to thereby permit disassembly of the die members while within a belled pipe end.
Claim 2
Dependent Claim
179 words
In an apparatus for belling the ends of plastic pipe having a central pipe axis, a die comprising: a longitudinal core element centered about a longitudinal die axis adapted to be coaxial with the pipe axis of a pipe end to be belled, said core element having exterior outwardly facing longitudinal surface areas parallel to the die axis; a plurality of radial segmented die members arranged circumferentially about the core element and supported, when assembled, by engagement of the outwardly facing longitudinal surface areas of the core element, the die members extending longitudinally coextensive with one another and having complementary outer surfaces which when assembled about the core element, define cylindrical surface configurations centered about the die axis and complementary to the desired inner surface configuration of the belled pipe end; said core element being longitudinally removable from within the assembled die members; one of said die members being radially movable between the die members to each side thereof following removal of the core element, to thereby permit disassembly of the die members while within a belled pipe end.
Claim 3
Dependent Claim
102 words
An apparatus as set out in claim 1 wherein a first corresponding longitudinal end of each die member is stepped to form a continuous peripheral ledge of reduced radial dimension about the assembled die members; said core element including a radial extension formed at one longitudinal end thereof and having a peripheral collar projecting longitudinally toward the die members, the collar having an inner surface configuration formed thereon complementary to the continuous peripheral ledge of the assembled die members, whereby the stepped end of said die members are radially located by engagement of the ledge within the inner surface of the collar.
Claim 4
Dependent Claim
154 words
An apparatus as set out in claim 1 wherein a first corresponding longitudinal end of each die member is stepped to form a continuous peripheral ledge of reduced radial dimension about the assembled die members; said core element including a radial extension formed at one longitudinal end thereof and having a peripheral collar projecting longitudinally toward the die members, the collar having an inner surface configuration formed thereon complementary to the continuous peripheral ledge of the assembled die members, whereby the stepped end of said die members are radially located by engagement of the ledge within the inner surface of the collar; said radial extension and said collar having a cylindrical outer surface centered about the die axis and located so as to complete the desired exterior configuration of said die when the die members are assembled on said core element with the ledge formed thereon engaged within the inner surface of the collar.
Claim 5
Dependent Claim
28 words
An apparatus as set out in claim 1 wherein said one die member abuts the die members adjacent to it along spaced plane surfaces parallel to one another.
Claim 6
Dependent Claim
54 words
An apparatus as set out in claim 1 comprising four complementary die members; said one die member abutting the two die members at each side thereof along spaced plane surfaces parallel to one another; said two die members further abutting The remaining die member along a plane surface perpendicular to said spaced plane surfaces.
Claim 7
Dependent Claim
31 words
An apparatus as set out in claim 5 wherein said remaining die member is located elevationally below said one die member and said spaced plane surfaces each lie in vertical planes.
Claim 8
Dependent Claim
70 words
An apparatus as set out in claim 6 wherein said core element and said die members each have formed thereon complementary interfitting surfaces which prevent radial displacement of corresponding ends of the die members relative to the core element when assembled thereon, while permitting removal of the core element from the assembled die members by longitudinal movement of the core element relative to the die members along the die axis.
Claim 9
Dependent Claim
121 words
An apparatus as set out in claim 6 wherein said core element and said die members each have formed thereon complementary interfitting surfaces which prevent radial displacement of corresponding ends of the die members relative to the core element when assembled thereon, while permitting removal of the core element from the assembled die members by longitudinal movement of the core element relative to the die members along the die axis; and longitudinally engageable means on the core element and said remaining die member for interlocking with the core element the end of the remaining die member opposite to its interfitting surface for preventing radial displacement of the remaining die member relative to the core element when mounted on the core element.
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) | 1976-07-30 | 1977-01-29 | 1977-07-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-07-30 | 1981-01-29 | 1981-07-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-07-30 | 1985-01-29 | 1985-07-31 | $7700.00 | Window Closed / Lapsed |