US3815839A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Expansible winding drum assembly
Assignee: WITHROW ENTERPRISES INC AN OH CORP
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Filing: 1971-04-02
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Granted: 1974-06-11
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Expires: 1991-04-02
Abstract
Abstract The specification and drawings disclose an expansible drum assembly particularly suited for use in rewinding metal strip. The disclosed device comprises a rotatably mounted center shaft having arcuate outer shells or segments carried thereon. The segments define the drum assembly''s winding surface and each has a circumferential extent of less than 180*. One of the shells is pivotally connected to the shaft for arcuate movement in a generally radial direction. An actuating member extends longitudinally of the shaft between the shells. The actuating member has a surface which defines a continuation of the winding surface between the shells. Also, one surface on the actuating member is arranged to cam the pivotally mounted shell. Power means are provided for reciprocating the actuating member and radially. In the preferred embodiment, the power means comprise an expansible drum positioned between the actuating member and the shaft. Also disclosed is a strip clamp arrangement wherein the strip is clamped during outward movement of the actuating member.
Inventors
- 👤 J Madachy
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 19:54
CPC Classifications
B; B65; B65H; B65H75/00; B65H75/02; B65H75/18; B65H75/24; B65H75/242; B65H75/243; B65H75/2437; B21; B21C; B21C47/00; B21C47/28; B21C47/30; B21C47/32; B21C47/323; B65H75/28; B65H2301/00; B65H2301/40; B65H2301/41; B65H2301/414; B65H2301/41419; B65H2301/41422; B65H2301/414225
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
185 words
An expansible drum assembly for winding or unwinding strip material comprising: a center shaft adapted to be cantileverly supported and carrying first and second arcuate outer shells which define all but a portion of the winding surface and extend throughout a substantial portion of the length of the shaft; each of the shells having a circumferential extent of less than 180*; said first shell being rigidly affixed to said shaft and second shell being pivotally connected to the structure defined by the first shell and the shaft about an axis adjacent to one of the longitudinal edges of the second shell; biasing means for maintaining the second shell continuously biased in an inward direction; actuating means comprising an elongated actuating member between said shells and mounted for radial sliding movement, said actuating member having a first surface which forms said portion of the winding surface and a second surface which engages the free end portion of the second shell; and, drive means for selectively moving the member radially outward to cause the second shell to move outwardly against the biasing means to expand the shell.
Claim 2
Dependent Claim
185 words
An expansible drum assembly for winding or unwinding strip material comprising: a center shaft adapted to be cantileverly supported and carrying first and second arcuate outer shells which define all but a portion of the winding surface and extend throughout a substantial portion of the length of the shaft; each of the shells having a circumferential extent of less than 180*; said first shell being rigidly affixed to said shaft and second shell being pivotally connected to the structure defined by the first shell and the shaft about an axis adjacent to one of the longitudinal edges of the second shell; biasing means for maintaining the second shell continuously biased in an inward direction; actuating means comprising an elongated actuating member between said shells and mounted for radial sliding movement, said actuating member having a first surface which forms said portion of the winding surface and a second surface which engages the free end portion of the second shell; and, drive means for selectively moving the member radially outward to cause the second shell to move outwardly against the biasing means to expand the shell.
Claim 3
Dependent Claim
17 words
The assembly as defined in claim 1 wherein said actuating member is carried by pivot link assemblies.
Claim 4
Dependent Claim
24 words
The assembly as defined in claim 1 wherein said drive means includes an expansible hose member positioned between said actuating member and said shaft.
Claim 5
Dependent Claim
48 words
The assembly as defined in claim 1 including strip gripping means, said gripping means including a first gripping jaw carried oN said actuating member and a second gripping jaw carried by the first shell and located so that during outward movement of the actuating member, the jaws engage.
Claim 6
Dependent Claim
33 words
The assembly as defined in claim 4 wherein at least one of the gripping jaws comprises a series of separate sections, each of said sections being independently biased toward the other gripping jaw.
Claim 7
Dependent Claim
36 words
The assembly as defined in claim 1 wherein said second shell has a cam surface formed along its free edge and wherein said actuating member is positioned to engage said cam surface upon outward radial movement.
Claim 8
Dependent Claim
27 words
The assembly as defined in claim 1 wherein said drive means comprise a member adapted to be moved longitudinally to impart radial movement to said actuating member.
Claim 9
Dependent Claim
24 words
The assembly as defined in claim 1 wherein said actuating member is carried from said shaft by a slide member mounted for longitudinal movement.
Claim 10
Dependent Claim
18 words
The assembly as defined in claim 8 wherein pivot links connect said actuating member to said slide member.
Claim 11
Dependent Claim
23 words
The assembly as defined in claim 1 wherein said drive means comprise an expansible member positioned between said shaft and said actuating member.
Claim 12
Dependent Claim
19 words
The assembly as defined in claim 10 wherein said expansible member comprises a hose extending longitudinally of said shaft.
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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) | 1977-06-10 | 1977-12-10 | 1978-06-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-06-10 | 1981-12-10 | 1982-06-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-06-10 | 1985-12-10 | 1986-06-11 | $7700.00 | Window Closed / Lapsed |