Patent US4710689A successfully refreshed from Google Patents.
US4710689A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Device for preventing backlash on a fishing reel
Assignee: Ryobi Ltd
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Filing: 1986-06-20
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Granted: 1987-12-01
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Expires: 2006-06-20
Abstract
Abstract A fishing reel that includes an eddy current brake mechanism that applies a braking force to the spool of the reel when the speed or acceleration of the spool, as detected electrically, reaches a predetermined value. The reel further includes electrical means for detecting, calculating and comparing rotation of the spool to a predetermined value whereupon a magnetic brake slows the spool to prevent backlash.
Inventors
- 👤 Haruo Uetsuki
- 👤 Takehiro Kobayashi
- 👤 Hiroto Yamane
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 05:20
CPC Classifications
A; A01; A01K; A01K89/00; A01K89/015; A01K89/0155; A01K89/01555
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
145 words
A device for preventing backlash on a fishing reel wherein said reel includes a spool and a nonmagnetic electroconductive member rotated therewith, said member at times applying a braking force upon generation of an eddy current therein, said device comprising: a sensor for detecting rotation of said spool and generating an output signal, said output signal being comprised of pulses relating to rotation of said spool; a reference clock circuit for generating reference pulses at predetermined time intervals; counter means including a circuit for counting the number of said pulses from said sensor and said reference clock circuit; means governed by said counter means for calculating at least the speed of rotation of said spool; and control means governed by said calculating means for generating an eddy current in said nonmagnetic electroconductive member at times when the speed of said spool reaches a preset value.
Claim 2
Independent Claim
145 words
A device for preventing backlash on a fishing reel wherein said reel includes a spool and a nonmagnetic electroconductive member rotated therewith, said member at times applying a braking force upon generation of an eddy current therein, said device comprising: a sensor for detecting rotation of said spool and generating an output signal, said output signal being comprised of pulses relating to rotation of said spool; a reference clock circuit for generating reference pulses at predetermined time intervals; counter means including a circuit for counting the number of said pulses from said sensor and said reference clock circuit; means governed by said counter means for calculating at least the speed of rotation of said spool; and control means governed by said calculating means for generating an eddy current in said nonmagnetic electroconductive member at times when the speed of said spool reaches a preset value.
Claim 3
Dependent Claim
24 words
The device of claim 1 wherein said device includes a data input means for providing a preset value for the speed of said spool.
Claim 4
Dependent Claim
37 words
The device of claim 1 wherein said control means includes a plurality of magnets adjacent said nonmagnetic electroconductive member and said control means further includes means for moving said magnets in relation to said nonmagnetic electroconductive member.
Claim 5
Dependent Claim
28 words
The device of claim 3 wherein said control means includes an electric motor for moving said magnets, said motor being operatively connected to said magnets through gear means.
Claim 6
Dependent Claim
28 words
The device of claim 3 wherein said control means includes an electric motor for moving said magnets, said motor being operatively connected to said magnets through cam means.
Claim 7
Dependent Claim
54 words
The device of claim 1 wherein said electroconductive member comprises a cup-shaped member affixed to said spool, the rim portion of said cup-shaped member projecting between said magnets, said magnets being comprised of an annular array of inner magnets inside said cup-shaped member and an annular array of outer magnets outside said cup-shaped member.
Claim 8
Dependent Claim
22 words
The device of claim 5 wherein said inner magnets include means for rotating said inner magnets with respect to said outer magnets.
Claim 9
Dependent Claim
12 words
The device of claim 6 wherein said rotating means comprise cam means.
Claim 10
Dependent Claim
12 words
The device of claim 6 wherein said rotating means comprise gear means.
Claim 11
Dependent Claim
37 words
The device of claim 4 further comprising a magnet position confirmation circuit providing an output signal upon no pulse detection by said counter means, so that said electric motor is rotated reversely to reduce said eddy current.
Claim 12
Dependent Claim
26 words
The divice of claim 1, wherein said means for calculating the speed of rotation of said spool also includes calculation of the acceleration of said spool.
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) | 1990-11-30 | 1991-06-01 | 1991-12-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-11-30 | 1995-06-01 | 1995-12-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-11-30 | 1999-06-01 | 1999-12-01 | $7700.00 | Window Closed / Lapsed |