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US3825203A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pneumatically controlled bistable reel hub mechanism
Assignee: Unisys Corp
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Filing: 1972-09-20
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Granted: 1974-07-23
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Expires: 1992-09-20
Abstract
Abstract A bistable, pneumatically controlled hub, with a manual override, for locking a properly positioned reel on the hub by means of the expansion of a resilient ring channeled in the hub. The hub has an inner air chamber, including a reciprocable wall actuated by positive and negative air pressure supplied through the hub drive shaft and an auxiliary air chamber. Apertures in the auxiliary chamber are sealed only by the proper positioning of the reel on the hub permitting the reciprocable wall to pivot an over-center device for alternately exerting and releasing pressure on portions of the inner circumference of the resilient ring, and thereby on the inner bore of the reel.
Inventors
- 👤 K Kjos
- 👤 J Molleman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 20:12
CPC Classifications
G; G11; G11B; G11B15/00; G11B15/60; G11B15/66; G11B15/662
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
127 words
A pneumatically controlled hub for a reel comprising: rotatable, cylindrical, shell means for slidably receiving said reel about its periphery; means for sensing the proper positioning of said reel on said shell means; resilient means circumferentially positioned on said shell means for locking said reel to said shell means when at least a portion of said resilient means is expanded outwardly from saie shell means; bistable means having an operating position and a rest position for expanding at least a portion of said resilient means outwardly from said shell means at said operating position, said bistable means being independently stable at said operating position and said rest position; and pneumatic means responsive to said sensing means for shifting said bistable means between said rest and operating positions
Claim 2
Dependent Claim
127 words
A pneumatically controlled hub for a reel comprising: rotatable, cylindrical, shell means for slidably receiving said reel about its periphery; means for sensing the proper positioning of said reel on said shell means; resilient means circumferentially positioned on said shell means for locking said reel to said shell means when at least a portion of said resilient means is expanded outwardly from saie shell means; bistable means having an operating position and a rest position for expanding at least a portion of said resilient means outwardly from said shell means at said operating position, said bistable means being independently stable at said operating position and said rest position; and pneumatic means responsive to said sensing means for shifting said bistable means between said rest and operating positions
Claim 3
Dependent Claim
45 words
The pneumatically controlled hub of claim 1 wherein said pneumatic means includes: a main air chamber within said cylindrical shell means including piston means engaging the inner surface thereof; valve means accessing said air chamber; and means for supplying pneumatic actuation to said valve means.
Claim 4
Dependent Claim
38 words
The pneumatically controlled hub of claim 2 wherein said means for supplying pneumatic actuation to said valve means includes means for applying positive air pressure for shifting said bistable means from said rest position to said operating position.
Claim 5
Dependent Claim
38 words
The pneumatically controlled hub of claim 2 wherein said means for supplying pneumatic actuation to said valve means includes means for applying negative air pressure for shifting said bistable means from said operating position to said rest position.
Claim 6
Dependent Claim
28 words
The pneumatically controlled hub of claim 1 also including manual means for shifting said bistable means between said rest and operating positions and for overriding said pneumatic means.
Claim 7
Dependent Claim
47 words
The pneumatically controlled hub of claim 2 wherein said bistable means includes: reciprocating means actuated by said piston means; means for transmitting expanding pressure against said resilient means from said inside said cylindrical shell means; and over-center means pivoted between said reciprocating means and said transmitting means.
Claim 8
Dependent Claim
59 words
The pneumatically controlled hub of claim 2 wherein said means for supplying pneumatic actuation to said valve means includes an auxiliary air chamber affixed to said cylindrical shell means and wherein said sensing means includes a plurality of apertures in said auxiliary air chamber and also includes closure means for sealing said aperture when said reel is positioned thereagainst.
Claim 9
Dependent Claim
51 words
The pneumatically controlled hub of claim 7 also including a drive shaft for rotating said cylindrical shell means and wherein aid means for supplying pneumatic actuation to said valve means includes a hollow portion of said shaft and apertures in said shaft interconnecting said hollow portion and said auxiliary air chamber.
Claim 10
Dependent Claim
42 words
The pneumatically controlled hub of claim 8 wherein said reciprocating means includes a sleeve slidably mounted on said drive shaft and wherein said drive shaft and wherein said piston means includes a lip seal slidably engaging the inner surface of said shell.
Claim 11
Dependent Claim
66 words
The pneumatically controlled hub of claim 9 wherein said cylindrical shell means includes transverse support means therein and wherein said sleeve is journalled in said transverse support means and wherein said transmitting means is at least a pair of shoes evenly spaced in the periphery of said cylindrical shell means and slidably retained between a wall of said main air chamber and said transverse support means.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-07-22 | 1978-01-21 | 1978-07-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-07-22 | 1982-01-21 | 1982-07-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-07-22 | 1986-01-21 | 1986-07-23 | $7700.00 | Window Closed / Lapsed |