Patent US4579295A successfully refreshed from Google Patents.
US4579295A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Brake mechanism for tape cassette
Assignee: Sony Corp
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Filing: 1984-12-05
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Granted: 1986-04-01
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Expires: 2004-12-05
Abstract
Abstract A brake mechanism for a pair of reels of a tape cassette includes a base member slidable in a guideway in a direction extending between the pair of reels. A pair of stopper members or arms are hinged on the base member and extend away therefrom for engaging teeth on flanges of the reels. The base block includes a spring hold pin to which is anchored a spring which urges the stopper members towards the teeth to lock the reels in position.
Inventors
- 👤 Masayuki Harada
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 08:46
CPC Classifications
G; G11; G11B; G11B23/00; G11B23/02; G11B23/04; G11B23/08; G11B23/087; G11B23/08707; G11B23/08721
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
121 words
A brake mechanism for a tape cassette having a cassette housing and a pair of tape reels on which a recording tape is wound, each tape reel being provided with a flange having teeth on an outer periphery thereof, the brake mechanism comprising: a base member slidable in a direction extending between said pair of tape reels; a spring hold pin provided on said base member; a pair of substantially rigid stopper members hinged on said base member and extending away from said base member for engaging said teeth of said flanges for braking purposes; and a spring anchored at said spring hold pin of said base member for urging said pair of stopper members toward said teeth of said flanges.
Claim 2
Dependent Claim
121 words
A brake mechanism for a tape cassette having a cassette housing and a pair of tape reels on which a recording tape is wound, each tape reel being provided with a flange having teeth on an outer periphery thereof, the brake mechanism comprising: a base member slidable in a direction extending between said pair of tape reels; a spring hold pin provided on said base member; a pair of substantially rigid stopper members hinged on said base member and extending away from said base member for engaging said teeth of said flanges for braking purposes; and a spring anchored at said spring hold pin of said base member for urging said pair of stopper members toward said teeth of said flanges.
Claim 3
Dependent Claim
33 words
A brake mechanism according to claim 1, wherein said base member, said spring hold pin and said pair of stopper members are made of synthetic resin and are formed simultaneously by injection molding.
Claim 4
Dependent Claim
27 words
A brake mechanism according to claim 2, wherein each of said pair of stopper members has a thin portion forming a hinge joint with said base member.
Claim 5
Dependent Claim
21 words
A brake mechanism according to claim 3, wherein said pair of stopper members extend from respective sides of said base member.
Claim 6
Dependent Claim
59 words
A brake mechanism according to claim 1, wherein said spring is a torsion spring having a coiled portion and a pair of arms extending from said coiled portion, said coiled portion is anchored at said spring hold pin, and each of said pair of arms is engaged with a free end of a respective one of said stopper members.
Claim 7
Dependent Claim
27 words
A brake mechanism according to claim 1, wherein said stopper members are arranged to engage teeth on the outer peripheries of lower flanges of said tape reels.
Claim 8
Dependent Claim
21 words
A brake mechanism according to claim 1, wherein said spring hold pin is provided on the top of said base member.
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) | 1989-03-31 | 1989-09-30 | 1990-04-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-03-31 | 1993-09-30 | 1994-04-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-03-31 | 1997-09-30 | 1998-04-01 | $7700.00 | Window Closed / Lapsed |