US4590351A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Compact portable turntable for microwave ovens
Assignee: Plastics Inc
•
Filing: 1985-03-22
•
Granted: 1986-05-20
•
Expires: 2005-03-22
Abstract
Abstract Compact turntable for use in microwave ovens. The drive motor assembly is positioned entirely beneath the rotating platform having a ring of inwardly facing gear teeth and has a relatively low profile. This turntable can be utilized in smaller oven cavities than bulkier turntables heretofore provided.
Inventors
- 👤 James F. Pomroy
- 👤 Allen M. Danley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 13:17
CPC Classifications
H; H05; H05B; H05B6/00; H05B6/64; H05B6/6408; H05B6/6411; Y; Y10; Y10S; Y10S99/00; Y10S99/14
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
93 words
In a portable turntable for use in a microwave oven: a relatively shallow base which rests on a supporting surface in the oven cavity, a platform mounted on the base for rotation about a vertically extending axis, said platform having a ring of gear teeth centered about the axis and facing inwardly toward the axis, and a drive motor assembly removably mounted on the base beneath the platform with an output gear positioned within and in driving engagement with the ring of gear teeth for rotating the platform about the vertically extending axis.
Claim 2
Dependent Claim
93 words
In a portable turntable for use in a microwave oven: a relatively shallow base which rests on a supporting surface in the oven cavity, a platform mounted on the base for rotation about a vertically extending axis, said platform having a ring of gear teeth centered about the axis and facing inwardly toward the axis, and a drive motor assembly removably mounted on the base beneath the platform with an output gear positioned within and in driving engagement with the ring of gear teeth for rotating the platform about the vertically extending axis.
Claim 3
Dependent Claim
29 words
The turntable of claim 1 wherein the drive motor assembly is enclosed in a relatively flat housing of limited vertical extent which rests in a pocket in the base.
Claim 4
Dependent Claim
44 words
The turntable of claim 1 including a circular track positioned concentrically of the axis on the underside of the platform, and a plurality of rollers mounted on the base in rolling engagement with the track to constrain the platform for rotation about the axis.
Claim 5
Dependent Claim
34 words
The turntable of claim 3 wherein the track comprises a concentric pair of flanges which depend from the underside of the platform, and the rollers engage the underside of the platform between the flanges.
Claim 6
Dependent Claim
101 words
In a portable turntable for use in a microwave oven: a base which rests on a supporting surface in the oven cavity, a plurality of rollers mounted on the base and spaced about an axis, a platform resting on the rollers and having a circular track which engages the rollers and constrains the platform for rotation about the axis, and a drive motor assembly removably mounted on the base beneath the platform and having an output gear in driving engagement with a ring of inwardly facing gear teeth on the underside of the platform for rotating the platform about the axis.
Claim 7
Dependent Claim
101 words
In a portable turntable for use in a microwave oven: a base which rests on a supporting surface in the oven cavity, a plurality of rollers mounted on the base and spaced about an axis, a platform resting on the rollers and having a circular track which engages the rollers and constrains the platform for rotation about the axis, and a drive motor assembly removably mounted on the base beneath the platform and having an output gear in driving engagement with a ring of inwardly facing gear teeth on the underside of the platform for rotating the platform about the axis.
Claim 8
Dependent Claim
34 words
The turntable of claim 5 wherein the track comprises a concentric pair of flanges which depend from the underside of the platform, and the rollers engage the underside of the platform between the flanges.
References Cited (Backward Citations)
JPS513146A
Cited
JPS5292454A
Cited
US4210794A
Cited
US4330696A
Cited
US4216727A
Cited
US4219715A
Cited
US4258630A
Cited
US4254319A
Cited
US4239009A
Cited
US4308445A
Cited
US4330697A
Cited
US4434343A
Cited
US4523070A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1989-05-19 | 1989-11-18 | 1990-05-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-05-19 | 1993-11-18 | 1994-05-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-05-19 | 1997-11-18 | 1998-05-20 | $7700.00 | Window Closed / Lapsed |