Patent US4361288A successfully refreshed from Google Patents.
US4361288A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rotating speed detecting device of a rotary type electrostatic spray painting device
Assignee: Toyota Motor Corp
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Filing: 1980-09-17
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Granted: 1982-11-30
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Expires: 2000-09-17
Abstract
Abstract A rotating speed detecting device of a rotary type electrostatic spray painting device comprising an annular permanent magnet fixed onto the rotary shaft of the spray painting device, and a detecting head mounted on the housing of the spray painting device. The detecting head has an induction coil enclosed by electrically insulating material.
Inventors
- 👤 Daiki Fukuda
- 👤 Teru Morishita
- 👤 Toshikazu Suzuki
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 05:21
CPC Classifications
B; B05; B05B; B05B3/00; B05B3/02; B05B3/10; B05B3/1085; B05B5/00; B05B5/025; B05B5/04; B05B5/0415; G; G01; G01P; G01P3/00; G01P3/42; G01P3/44; G01P3/48; G01P3/481; G01P3/487
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
139 words
A rotating speed detecting device for a rotary-type electrostatic spray painting device having a housing and a rotary shaft arranged in the housing, the detecting device further comprising: an annular member fixed on the rotary shaft and having an annular groove formed therein, said annular groove being arranged concentrically about an axis of rotation of the rotary shaft; an annular permanent magnet fixed into said annular groove and arranged concentrically about said axis of rotation of the rotary shaft; and a detecting head mounted on the housing and arranged to be radially spaced from said annular permanent magnet, said detecting head having a cylindrical body made of an insulating material, said cylindrical body having embedded therein an induction coil, enclosed by said electrically insulating material, for producing an output signal representing the speed of rotation of the rotary shaft.
Claim 2
Dependent Claim
139 words
A rotating speed detecting device for a rotary-type electrostatic spray painting device having a housing and a rotary shaft arranged in the housing, the detecting device further comprising: an annular member fixed on the rotary shaft and having an annular groove formed therein, said annular groove being arranged concentrically about an axis of rotation of the rotary shaft; an annular permanent magnet fixed into said annular groove and arranged concentrically about said axis of rotation of the rotary shaft; and a detecting head mounted on the housing and arranged to be radially spaced from said annular permanent magnet, said detecting head having a cylindrical body made of an insulating material, said cylindrical body having embedded therein an induction coil, enclosed by said electrically insulating material, for producing an output signal representing the speed of rotation of the rotary shaft.
Claim 3
Dependent Claim
30 words
A rotating speed detecting device as claimed in claim 1, wherein said annular member is a spacer arranged between a turbine wheel and a runner of the spray painting device.
Claim 4
Dependent Claim
20 words
A rotating speed detecting device as claimed in claim 1, wherein said cylindrical body is made of hard polyvinyl chloride.
Claim 5
Dependent Claim
24 words
A rotating speed detecting device as claimed in claim 1, wherein said cylindrical body has a thickness of about 5 mm to 15 mm.
Claim 6
Dependent Claim
29 words
A rotating speed detecting device as claimed in claim 3, wherein said induction coil comprises a bobbin made of magnetic material, and an electrical wire wound around said bobbin.
Claim 7
Dependent Claim
27 words
A rotating speed detecting device as claimed in claim 3, wherein said detecting head is fitted into a bore formed on an outer wall of said housing.
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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) | 1985-11-29 | 1986-05-31 | 1986-11-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-11-29 | 1990-05-31 | 1990-11-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-11-29 | 1994-05-31 | 1994-11-30 | $7700.00 | Window Closed / Lapsed |