Patent US4413793A successfully refreshed from Google Patents.
US4413793A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cassette tape machine
Assignee: Pioneer Corp
•
Filing: 1981-12-28
•
Granted: 1983-11-08
•
Expires: 2001-12-28
Abstract
Abstract The engagement between shaft hub and cassette reel is made resilient to dampen tape resonance. The hub projections can be either of a viscous elastic material, or a radially yieldable spring member.
Inventors
- 👤 Masahiro Komatsubara
- 👤 Tetsuro Kamimura
- 👤 Takugi Inanaga
- 👤 Akira Takahashi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 02:00
CPC Classifications
G; G11; G11B; G11B15/00; G11B15/18; G11B15/26; G11B15/32; G11B15/46; G11B15/50; Y; Y10; Y10S; Y10S242/00; Y10S242/907
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
88 words
In a cassette tape machine having a rotatable reel shaft unit with at least one engagement projection on its outer periphery having a contact surface for engaging a reel in a cassette tape whereby said reel rotates said shaft unit in a supply direction, the improvement characterized in that said shaft unit includes a hub of a viscous elastic material having a plurality of viscous elastic engagement projections, and a plastic member covering said hub and having a slit therein for exposing said engagement projection to said reel.
Claim 2
Dependent Claim
88 words
In a cassette tape machine having a rotatable reel shaft unit with at least one engagement projection on its outer periphery having a contact surface for engaging a reel in a cassette tape whereby said reel rotates said shaft unit in a supply direction, the improvement characterized in that said shaft unit includes a hub of a viscous elastic material having a plurality of viscous elastic engagement projections, and a plastic member covering said hub and having a slit therein for exposing said engagement projection to said reel.
Claim 3
Dependent Claim
34 words
A cassette tape machine as claimed in claim 1, wherein said shaft unit further includes a shaft member about which said hub is mounted and with respect to which said hub is axially slidable.
References Cited (Backward Citations)
DE732545C
Cited
US2620140A
Cited
US2616633A
Cited
US2625336A
Cited
US3791604A
Cited
US4050649A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1986-11-07 | 1987-05-09 | 1987-11-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-11-07 | 1991-05-09 | 1991-11-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-11-07 | 1995-05-09 | 1995-11-08 | $7700.00 | Window Closed / Lapsed |