Patent US4563560A successfully refreshed from Google Patents.
US4563560A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Microwave oven construction
Assignee: Maytag Corp
•
Filing: 1982-06-11
•
Granted: 1986-01-07
•
Expires: 2002-06-11
Abstract
Abstract A microwave oven construction is disclosed wherein the oven cavity is assembled without the use of structural welds. A pair of pan shaped members, one forming the oven cavity top and the other forming the oven cavity bottom are placed edge to edge and crimped together to form a unitary cavity structure. An oven front panel is crimped to the cavity structure thus formed.
Inventors
- 👤 Howard E. Bonner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 13:06
CPC Classifications
H; H05; H05B; H05B6/00; H05B6/64; H05B6/76; H05B6/766; F; F24; F24C; F24C15/00; F24C15/08; H05B6/6426
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
155 words
In a microwave oven having an oven cavity assembly including a source of microwave energy fed into said microwave oven cavity assembly, said microwave oven cavity assembly being substantially free of structural welds, said assembly comprising only two members: (a) the first member formed as a unitary pan-like member having a well portion integrally formed therein, said first member comprising a bottom wall and portions of side and rear walls of a microwave oven cavity; (b) the second member formed as a unitary pan-like member comprising a top wall and portions of side and rear walls of a microwave oven cavity; and wherein said first and second members are permanently joined together at respective abutting peripheral side and rear wall edges by tightly crimping one such edge about the other to form a microwave oven cavity having bottom, top, side, and rear walls and which is substantially enclosed on all but a front wall thereof.
Claim 2
Dependent Claim
155 words
In a microwave oven having an oven cavity assembly including a source of microwave energy fed into said microwave oven cavity assembly, said microwave oven cavity assembly being substantially free of structural welds, said assembly comprising only two members: (a) the first member formed as a unitary pan-like member having a well portion integrally formed therein, said first member comprising a bottom wall and portions of side and rear walls of a microwave oven cavity; (b) the second member formed as a unitary pan-like member comprising a top wall and portions of side and rear walls of a microwave oven cavity; and wherein said first and second members are permanently joined together at respective abutting peripheral side and rear wall edges by tightly crimping one such edge about the other to form a microwave oven cavity having bottom, top, side, and rear walls and which is substantially enclosed on all but a front wall thereof.
Claim 3
Dependent Claim
52 words
The assembly of claim 1 in combination with a front panel completely encircling the unclosed front wall of said oven cavity, said front panel being fixed to said cavity by tightly crimping a cavity edge to said front panel in a continuous seam between said cavity front wall and said front panel.
Claim 4
Dependent Claim
29 words
The assembly of claim 1 wherein said first member further comprises a lower portion of a microwave oven cavity that is free of seams at the lowest plane thereof.
Claim 5
Dependent Claim
19 words
The assembly of claim 1 wherein said second pan like member has an energy distributing chamber integrally formed therein.
Claim 6
Dependent Claim
29 words
The assembly of claim 2 wherein said front panel includes a forwardly extending flange and said cavity front wall includes an edge which is tightly crimped to said flange.
Claim 7
Dependent Claim
30 words
The assembly of claim 3 further including a door having a microwave choke therein and wherein said forwardly extending flange is inserted into said choke when said door is closed.
References Cited (Backward Citations)
US1492909A
Cited
US1815312A
Cited
US2557496A
Cited
GB909009A
Cited
US3484573A
Cited
US3544751A
Cited
DE7441834U
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1989-01-06 | 1989-07-08 | 1990-01-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-01-06 | 1993-07-08 | 1994-01-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-01-06 | 1997-07-08 | 1998-01-07 | $7700.00 | Window Closed / Lapsed |