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US4757173A
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Turntable for use in a microwave oven
Assignee: LG Electronics Inc
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Filing: 1987-05-28
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Granted: 1988-07-12
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Expires: 2007-05-28
Abstract
Abstract A turntable for use in a microwave oven which comprises a tray containing a stem portion for supporting an object to be heated, an axial cavity disposed in the stem portion, a motor shaft extending into the axial cavity for operative engagement with the stem portion, a motor connected to the motor shaft for rotating the shaft and tray and stem composite, a roller cavity disposed in the stem portion lateral to the axial cavity, and a roller eccentrically mounted in the roller cavity to support the stem portion whereby, upon the horizontal rotation of the stem and tray composite, the stem and tray also move in the vertical plane.
Inventors
- 👤 Jong K. Park
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 03:58
CPC Classifications
H; H05; H05B; H05B6/00; H05B6/64; H05B6/6408; H05B6/6411
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
128 words
A turntable for use in a microwave oven which comprises: a tray for supporting an object to be heated, said tray containing a stem portion, an axial cavity disposed in said stem portion, a motor shaft extending into said axial cavity for operative engagement with said stem portion, motor means connected to said motor shaft for rotating said motor shaft and said tray and stem portion composite, a roller cavity disposed in said stem portion lateral to said axial cavity, and roller means eccentrically mounted in said roller cavity to support said stem portion whereby, upon the horizontal rotation of the stem portion and tray composite, the stem portion and tray also move in the vertical plane for subjecting the object to uniform heating in the microwave oven.
Claim 2
Dependent Claim
128 words
A turntable for use in a microwave oven which comprises: a tray for supporting an object to be heated, said tray containing a stem portion, an axial cavity disposed in said stem portion, a motor shaft extending into said axial cavity for operative engagement with said stem portion, motor means connected to said motor shaft for rotating said motor shaft and said tray and stem portion composite, a roller cavity disposed in said stem portion lateral to said axial cavity, and roller means eccentrically mounted in said roller cavity to support said stem portion whereby, upon the horizontal rotation of the stem portion and tray composite, the stem portion and tray also move in the vertical plane for subjecting the object to uniform heating in the microwave oven.
Claim 3
Dependent Claim
55 words
The turntable of claim 1, wherein the roller cavity contains lateral space on both sides of the roller means, said lateral space permitting lateral movement of the roller means whereby the tray and stem portion composite becomes canted during its rotation for exposing a larger surface of the object to be heated by microwave energy.
Claim 4
Dependent Claim
31 words
The turntable of claim 2, wherein the roller means is mounted with lateral clearance on a roller shaft for further causing the stem portion and tray composite to become additionally canted.
Claim 5
Dependent Claim
27 words
The turntable of claim 1 wherein the turntable is adapted to be disposed within a case which is mounted to a bottom plate of a microwave oven.
Claim 6
Dependent Claim
115 words
A turntable for use in a microwave oven which comprises: a tray for supporting an object to be heated, said tray containing a stem portion, a housing gear operatively engaged with the external surface of said stem portion, motor means connected to said housing gear for rotating said housing gear and said stem portion and tray composite, a roller cavity disposed in said stem portion lateral thereto, and roller means eccentrically mounted in said roller cavity to support said stem portion whereby, upon the horizontal rotation of the stem portion and tray composite, the stem portion and tray also move in the vertical plane for subjecting the object to uniform heating in the microwave oven.
Claim 7
Dependent Claim
115 words
A turntable for use in a microwave oven which comprises: a tray for supporting an object to be heated, said tray containing a stem portion, a housing gear operatively engaged with the external surface of said stem portion, motor means connected to said housing gear for rotating said housing gear and said stem portion and tray composite, a roller cavity disposed in said stem portion lateral thereto, and roller means eccentrically mounted in said roller cavity to support said stem portion whereby, upon the horizontal rotation of the stem portion and tray composite, the stem portion and tray also move in the vertical plane for subjecting the object to uniform heating in the microwave oven.
Claim 8
Dependent Claim
55 words
The turntable of claim 5, wherein the roller cavity contains lateral space on both sides of the roller means, said lateral space permitting lateral movement of the roller means whereby the tray and stem portion composite becomes canted during its rotation for exposing a larger surface of the object to be heated by microwave energy.
Claim 9
Dependent Claim
31 words
The turntable of claim 5, wherein the roller means is mounted with lateral clearance on a roller shaft for further causing the stem portion and tray composite to become additionally canted.
Claim 10
Dependent Claim
27 words
The turntable of claim 5 wherein the turntable is adapted to be disposed within a case which is mounted to a bottom plate of a microwave oven.
Claim 11
Dependent Claim
25 words
The turntable of claim 5, wherein the housing and the external surface of said stem portion are provided with gearing surfaces for engaging each other.
References Cited (Backward Citations)
US3436506A
Cited
US4631379A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1991-07-12 | 1992-01-11 | 1992-07-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-07-12 | 1996-01-11 | 1996-07-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-07-12 | 2000-01-11 | 2000-07-12 | $7700.00 | Window Closed / Lapsed |