US3733456A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Microwave oven door latch
Assignee: Goodman Co LP
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Filing: 1971-09-07
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Granted: 1973-05-15
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Expires: 1991-09-07
Abstract
Abstract An electrically actuated arrangement for securing the door of a microwave oven apparatus while the energy is radiating within the enclosure. The door can only be opened by the user after the heating source has been de-energized. Mechanical latching structures are eliminated and the novel door latch is adaptable to either the side-mounted swinging oven door as well as the drop down model.
Inventors
- 👤 L Blackburn
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 21:12
CPC Classifications
H; H05; H05B; H05B6/00; H05B6/64; H05B6/6414; H05B6/6417; Y; Y10; Y10T; Y10T292/00; Y10T292/08; Y10T292/0911; Y10T292/0936; Y10T292/1043; Y10T292/1075; Y10T292/1082; Y10T292/175; Y10T292/18
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
106 words
Microwave oven apparatus comprising: an enclosure having an access opening; a microwave energy generator adapted to radiate energy within said enclosure; a door for closing said opening; a latch member pivotally supported by said door; interlock switch means connected in an electrical circuit for operating said generator including a lever arm; said latch member being adapted to depress said lever arm when said door is closed; a resilient member adapted to engage said latch member; and an electromagnetically actuated reciprocally movable lock member adapted to engage the upper wall portion of said resilient member and prevent movement of said latch member while said generator is operative.
Claim 2
Dependent Claim
106 words
Microwave oven apparatus comprising: an enclosure having an access opening; a microwave energy generator adapted to radiate energy within said enclosure; a door for closing said opening; a latch member pivotally supported by said door; interlock switch means connected in an electrical circuit for operating said generator including a lever arm; said latch member being adapted to depress said lever arm when said door is closed; a resilient member adapted to engage said latch member; and an electromagnetically actuated reciprocally movable lock member adapted to engage the upper wall portion of said resilient member and prevent movement of said latch member while said generator is operative.
Claim 3
Dependent Claim
20 words
Apparatus as set forth in claim 1 wherein said door is hinged so as to be movable sideways when closed.
Claim 4
Dependent Claim
19 words
Apparatus as set forth in claim 1 wherein said door is hinged as to be moved upwardly when closed.
Claim 5
Dependent Claim
37 words
Apparatus as set forth in claim 1 wherein said reciprocating member includes mechanical linkage and a pawl at the outer end with said pawl adapted to move in a vertical plane when said lock member is actuated.
Claim 6
Dependent Claim
37 words
Apparatus as set forth in claim 1 wherein said reciprocating member includes mechanical linkage and a pawl at the outer end with said pawl adapted to move in a horizontal plane when said locking member is actuated.
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) | 1976-05-14 | 1976-11-13 | 1977-05-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-05-14 | 1980-11-13 | 1981-05-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-05-14 | 1984-11-13 | 1985-05-15 | $7700.00 | Window Closed / Lapsed |