Patent US4591682A successfully refreshed from Google Patents.
US4591682A
Expired / Lapsed
US
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Microwave oven with improved turntable drive
Assignee: Sharp Corp
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Filing: 1984-07-17
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Granted: 1986-05-27
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Expires: 2004-07-17
Abstract
Abstract A configuration of the improved turntable drive unit of a microwave oven comprising; a choke hole provided in the back of the bottom plate of the oven functioning as a coupling receiver to hold the coupling that freely rotates, and the coupling holder being engaged with the output shaft connects the coupling shaft to the output shaft. The improved configuration simplifies the connection of the output shaft and the coupling unit of the turntable drive unit, thus eventually making it possible to achieve a compact-size drive unit and cost reduction as a result of the eliminated conventional parts.
Inventors
- 👤 Koichi Takeuji
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 19:03
CPC Classifications
H; H05; H05B; H05B6/00; H05B6/64; H05B6/78; H05B6/6408; H05B6/6411; F; F16; F16D; F16D1/00; F16D1/06
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
121 words
A microwave oven, comprising: a turntable; a drive unit for rotating said turntable; and a coupling connecting an output shaft of said drive unit to said turntable; said coupling comprising: a first coupling element having an upper portion engaging the underside of the center of said turnable; and a second coupling element having an upper portion comprising a plurality of prongs engaging a lower portion of said first coupling element therebetween and a lower portion engaging said output shaft; said oven including a bottom plate formed with a choke opening having a choke portion extending downwardly from the back plate, said lower portion of said first coupling element being inserted through said choke opening into engagement with said second coupling element.
Claim 2
Dependent Claim
121 words
A microwave oven, comprising: a turntable; a drive unit for rotating said turntable; and a coupling connecting an output shaft of said drive unit to said turntable; said coupling comprising: a first coupling element having an upper portion engaging the underside of the center of said turnable; and a second coupling element having an upper portion comprising a plurality of prongs engaging a lower portion of said first coupling element therebetween and a lower portion engaging said output shaft; said oven including a bottom plate formed with a choke opening having a choke portion extending downwardly from the back plate, said lower portion of said first coupling element being inserted through said choke opening into engagement with said second coupling element.
Claim 3
Dependent Claim
34 words
A microwave oven as claimed in claim 1, wherein said upper portion of said first coupling element has a peripheral shape which fits into a corresponding shaped recess in said underside of said turntable.
Claim 4
Dependent Claim
17 words
A microwave oven as claimed in claim 1, wherein said prongs resiliently engage said first coupling element.
Claim 5
Dependent Claim
27 words
A microwave oven as claimed in claim 1, wherein said prongs resiliently engage parallel grooves in the periphery of said lower portion of said first coupling element.
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) | 1989-05-26 | 1989-11-25 | 1990-05-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-05-26 | 1993-11-25 | 1994-05-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-05-26 | 1997-11-25 | 1998-05-27 | $7700.00 | Window Closed / Lapsed |