Patent US4298131A successfully refreshed from Google Patents.
US4298131A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pot lid
Assignee: Individual
•
Filing: 1980-09-22
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Granted: 1981-11-03
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Expires: 2000-09-22
Abstract
Abstract A pot lid adaptable to a cookpot for boiling down foods such as fish, meat and the like. The pot lid has a plate having a contour adaptable to the cookpot, and a cover detachably installed on an upper surface of the plate. The plate has a threaded hole at its center, openings for releasing steam and grooves which extend to the circumferential end of the plate. The cover has a diameter large enough to close the openings and a rod projecting downwardly. The rod has a threaded groove at its end portion with an ungrooved portion being left above the threaded groove. The threaded groove is engageable with the threaded hole of the plate. When in use, the ungrooved portion of the rod is slidably held within the threaded hole of the plate to permit a heated broth of the boiled foods to discharge from at least the openings.
Inventors
- 👤 Shoji Saito
- 👤 Mitsuo Nagashima
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 14:23
CPC Classifications
A; A47; A47J; A47J36/00; A47J36/06
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
226 words
A pot lid for use with a vessel comprising: a plate having a central portion and an outer circumferential portion surrounding the central portion, the central portion having a threaded opening in the center thereof and a plurality of openings surrounding the threaded opening, the outer circumferential portion having a plurality of grooves formed therein extending to the outer side edges of the plate; and a cover member having a cover portion with a size sufficiently large to cover said plurality of openings, a grip protruding upwardly from a central region of the cover portion, and a rod projecting downwardly from said grip through an opening formed in the cover portion, said rod having a threaded end portion engageable with the threaded opening of said plate to thereby interconnect said plate and cover member, said rod further having an unthreaded portion positioned between said end portion and said grip so that said cover portion is guided by said unthreaded portion for movement between a first position covering said plurality of openings and a second position vertically spaced above said openings, said cover portion in said first position blocking fluid flow through said openings and being moved from said first position towards said second position by pressure increase within the vessel during heating thereof and being moved from said second position towards said first position by gravity.
Claim 2
Dependent Claim
226 words
A pot lid for use with a vessel comprising: a plate having a central portion and an outer circumferential portion surrounding the central portion, the central portion having a threaded opening in the center thereof and a plurality of openings surrounding the threaded opening, the outer circumferential portion having a plurality of grooves formed therein extending to the outer side edges of the plate; and a cover member having a cover portion with a size sufficiently large to cover said plurality of openings, a grip protruding upwardly from a central region of the cover portion, and a rod projecting downwardly from said grip through an opening formed in the cover portion, said rod having a threaded end portion engageable with the threaded opening of said plate to thereby interconnect said plate and cover member, said rod further having an unthreaded portion positioned between said end portion and said grip so that said cover portion is guided by said unthreaded portion for movement between a first position covering said plurality of openings and a second position vertically spaced above said openings, said cover portion in said first position blocking fluid flow through said openings and being moved from said first position towards said second position by pressure increase within the vessel during heating thereof and being moved from said second position towards said first position by gravity.
Claim 3
Dependent Claim
267 words
A pot lid for use with a vessel having an opening with a predetermined internal diameter comprising: a plate having a central portion and an outer circumferential portion surrounding the central portion, the central portion having a threaded opening in the center thereof and a plurality of openings surrounding the threaded opening, the outer circumferential portion having a plurality of grooves formed therein extending to outer side edges of the plate, the outer dimensions of the plate being less than said predetermined internal diameter so that the plate is insertable into the vessel whereby the plate is positionable in contact with food within the vessel; and a cover member having a cover portion with a size sufficiently large to cover said plurality of openings, a grip protruding upwardly from a central region of the cover portion, and a rod projecting downwardly from said grip through an opening formed in the cover portion, said rod having a threaded end portion engageable with the threaded opening of said plate to thereby interconnect said plate and cover member, said rod further having an unthreaded portion positioned between said end portion and said grip so that said cover portion is guided by said unthreaded portion for movement between a first position covering said plurality of openings and a second position vertically spaced above said openings, said cover portion in said first position blocking fluid flow through said openings and being moved from said first position towards said second position by pressure increase within the vessel during heating thereof and being moved from said second position towards said first position by gravity.
Claim 4
Dependent Claim
267 words
A pot lid for use with a vessel having an opening with a predetermined internal diameter comprising: a plate having a central portion and an outer circumferential portion surrounding the central portion, the central portion having a threaded opening in the center thereof and a plurality of openings surrounding the threaded opening, the outer circumferential portion having a plurality of grooves formed therein extending to outer side edges of the plate, the outer dimensions of the plate being less than said predetermined internal diameter so that the plate is insertable into the vessel whereby the plate is positionable in contact with food within the vessel; and a cover member having a cover portion with a size sufficiently large to cover said plurality of openings, a grip protruding upwardly from a central region of the cover portion, and a rod projecting downwardly from said grip through an opening formed in the cover portion, said rod having a threaded end portion engageable with the threaded opening of said plate to thereby interconnect said plate and cover member, said rod further having an unthreaded portion positioned between said end portion and said grip so that said cover portion is guided by said unthreaded portion for movement between a first position covering said plurality of openings and a second position vertically spaced above said openings, said cover portion in said first position blocking fluid flow through said openings and being moved from said first position towards said second position by pressure increase within the vessel during heating thereof and being moved from said second position towards said first position by gravity.
Claim 5
Dependent Claim
28 words
The pot lid according to claim 1 or 2, in which said grooves extend radially and become deeper as they extend towards outer circumferential edges of said plate.
Claim 6
Dependent Claim
37 words
The pot lid according to claim 1 or 2, in which said plate has a spherical outer surface, said cover member having a spherical inner surface for a suitable fit to said outer surface of said plate.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1984-11-02 | 1985-05-04 | 1985-11-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-11-02 | 1989-05-04 | 1989-11-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-11-02 | 1993-05-04 | 1993-11-03 | $7700.00 | Window Closed / Lapsed |