Patent US3989439A successfully refreshed from Google Patents.
US3989439A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Device for forming tube sockets
Assignee: Inteco Establishment
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Filing: 1974-10-30
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Granted: 1976-11-02
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Expires: 1994-10-30
Abstract
Abstract A device for forming a tube of plastic material with a socket having an annular corrugation has a tube supporting core and a plurality of radially movable segments provided adjacently with contacting wedge surfaces, the segments in outwardly shifted position defining a circumferentially beaded portion for forming the annular corrugation on the supported tube.
Inventors
- 👤 Franz Schmitzberger
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 11:51
CPC Classifications
B; B29; B29C; B29C57/00; B29C57/02; B29C57/08; B29C57/04; Y; Y10; Y10S; Y10S425/00; Y10S425/014; Y10S425/218
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
305 words
A device for forming sockets with annular corrugations or recesses on tubes of plastic material comprising a core having a longitudinal axis and a peripheral surface over which a tube to be formed is fitted, a plurality of segments circumferentially arranged around the core at said surface and including a first set wherein the segments end oppositely in outwardly converging wedge surfaces and a second set wherein the segments end oppositely in outwardly diverging wedge surfaces, the segments of said first and second sets being alternately arranged with adjacent wedge surfaces of the same inclination and in sliding contact, spring means acting on the segments of said second set biasing said adjacent wedge surfaces into contact, means mounting each of said segments for slidable displacement substantially radially of the core in a plane perpendicular to the core axis, fluid motor means driving the segments of said first set between an inner retracted position and an outer extended position at said peripheral surface, the segments of said second set being displaced against the force of said spring means by outward movement of the segments of said first set to an outer extended position in circumferentially continuous relation with the extended segments of said first set, said spring means being energized by outward movement of said second set of segments, rim means at said peripheral surface for uniformly limiting outward movement of said segments, and said segments being shaped at their outer faces to define in said outwardly extended limited positions a substantially continuous annular bead at said surface adapted to form the corrugation or recess in said tube, said first set of segments being driven inwardly to retracted position by said motor means, and said energized spring means driving said second set of segments to inner retracted position as the first set of segments is retracted.
Claim 2
Independent Claim
305 words
A device for forming sockets with annular corrugations or recesses on tubes of plastic material comprising a core having a longitudinal axis and a peripheral surface over which a tube to be formed is fitted, a plurality of segments circumferentially arranged around the core at said surface and including a first set wherein the segments end oppositely in outwardly converging wedge surfaces and a second set wherein the segments end oppositely in outwardly diverging wedge surfaces, the segments of said first and second sets being alternately arranged with adjacent wedge surfaces of the same inclination and in sliding contact, spring means acting on the segments of said second set biasing said adjacent wedge surfaces into contact, means mounting each of said segments for slidable displacement substantially radially of the core in a plane perpendicular to the core axis, fluid motor means driving the segments of said first set between an inner retracted position and an outer extended position at said peripheral surface, the segments of said second set being displaced against the force of said spring means by outward movement of the segments of said first set to an outer extended position in circumferentially continuous relation with the extended segments of said first set, said spring means being energized by outward movement of said second set of segments, rim means at said peripheral surface for uniformly limiting outward movement of said segments, and said segments being shaped at their outer faces to define in said outwardly extended limited positions a substantially continuous annular bead at said surface adapted to form the corrugation or recess in said tube, said first set of segments being driven inwardly to retracted position by said motor means, and said energized spring means driving said second set of segments to inner retracted position as the first set of segments is retracted.
Claim 3
Dependent Claim
74 words
A device according to claim 1, characterized in that said core is divided axially into two parts which are joined together, said segments being disposed between said core parts, said rim means comprising inwardly tapered circumferential lips on ends of said core parts facing one another, said outer surfaces of said segments including tapered peripheral edge portions in mating contact with said circumferential lips in said outward extended bead defining position of said segments.
Claim 4
Dependent Claim
42 words
A device according to claim 1, wherein each segment of said second set is mounted on a tubular member slidably telescoped upon a fixed internal radial projection, and said spring means comprises individual springs acting on each segment of said second set.
Claim 5
Dependent Claim
49 words
A device according to claim 1, wherein said fluid motor means comprises a plurality of radially arranged cylinders open at their inner ends to a common pressure chamber, and a piston is slidably mounted in each cylinder with its outer end fixed to a segment of said first set.
Claim 6
Dependent Claim
48 words
A device according to claim 1, characterized in that in said outward extended position of said segments their wedge surfaces are inclined in an angle of from 20° to 70° with respect to a tangent drawn on a circle defined by the external circumference of said extended segments.
Claim 7
Dependent Claim
45 words
A device according to claim 1, wherein said fluid motor means comprises an individual piston cylinder fluid motor for each of said driven first set of segments, said first set of driven segments being connected to the pistons of their respective piston cylinder fluid motors.
Claim 8
Dependent Claim
30 words
A device according to claim 6, characterized in that said fluid motor drive means comprises a unit having radially arranged cylinders, and said pistons are slidably guided within said cylinders.
Claim 9
Dependent Claim
35 words
A device according to claim 7, characterized in that said core is divided axially into two parts which are joined together, said unit with its radially arranged cylinders being interposed between said two core parts.
Claim 10
Dependent Claim
35 words
A device according to claim 8, characterized in that said unit comprising radially arranged cylinders is provided with axially projecting means extending coincident with the core parts axes for joining said two core parts together.
Claim 11
Dependent Claim
32 words
A device according to claim 9, characterized in that one of said axially projecting means of said unit is hollow and further serves as a fluid pressure conduit connected to said cylinders.
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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) | 1979-11-02 | 1980-05-03 | 1980-11-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-11-02 | 1984-05-03 | 1984-11-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-11-02 | 1988-05-03 | 1988-11-02 | $7700.00 | Window Closed / Lapsed |