Patent US3869873A successfully refreshed from Google Patents.
US3869873A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Door structure for large freezer
Assignee: Elliott Williams Co Inc
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Filing: 1974-05-20
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Granted: 1975-03-11
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Expires: 1994-05-20
Abstract
Abstract For use with a walk-in type refrigerator or freezer, a door structure comprising a frame bounding at least the rectilinear sides of the opening and a door for closing the opening. The frame includes, for each side of the opening, an outer skin providing a longitudinally and inwardly extending first flange, an inner skin providing a longitudinally and outwardly extending second flange parallel to the first flange, and a jamb trim plate disposed between and engaging the flanges. The trim plate includes a longitudinally extending outer portion parallel to and engaging the first flange, a longitudinally extending inner portion parallel to and engaging the second flange, and an intermediate portion perpendicular to and connecting the outer and inner portions. The said intermediate portion provides a longitudinally extending and outwardly facing gasket mounting surface, and it may be provided with a longitudinally extending, laterally narrow slot intermediate its side edges for receivably engaging a projecting portion of a gasket. The door, of course, closes against the gasket. Further, heater strips are mounted on the door to extend longitudinally along the edge portions thereof to bear against the gasket extending about the opening in the frame when the door is closed.
Inventors
- 👤 John M Thomas
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 11:00
CPC Classifications
F; F25; F25D; F25D23/00; F25D23/08; F25D23/082; F25D23/085; Y; Y10; Y10T; Y10T292/00; Y10T292/11
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
234 words
In a refrigeration system, means providing a rectangular access opening comprising frame means bounding at least the sides of said opening and door means for closing said opening, said frame means including, for each side of said opening, an outer skin providing a longitudinally and inwardly extending first flange, an inner skin providing a longitudinally and outwardly extending second flange parallel to said first flange, said second flange being offset from said first flange toward the opposite side of said opening, a jamb trim plate disposed between and engaging said flanges, said trim plate including a longitudinally extending outer portion parallel to and engaging said first flange, a longitudinally extending inner portion parallel to and engaging said second flange, and an intermediate portion perpendicular to and connecting said outer and inner portions, said intermediate portion providing a longitudinally extending and outwardly facing gasket mounting surface, said outer portion providing a longitudinally extending clip portion receivably engaging said first flange, said inner portion providing a longitudinally extending clip portion receivably engaging said second flange, and said intermediate portion also providing, intermediate its edges, a longitudinally extending, laterally narrow slot, and a gasket mounted on said mounting surface to extend longitudinally therealong, said gasket including a longitudinally extending and inwardly projecting portion engaging into said slot to secure said gasket to said mounting surface, said door means being proportioned and mounted to close against said gasket.
Claim 2
Dependent Claim
234 words
In a refrigeration system, means providing a rectangular access opening comprising frame means bounding at least the sides of said opening and door means for closing said opening, said frame means including, for each side of said opening, an outer skin providing a longitudinally and inwardly extending first flange, an inner skin providing a longitudinally and outwardly extending second flange parallel to said first flange, said second flange being offset from said first flange toward the opposite side of said opening, a jamb trim plate disposed between and engaging said flanges, said trim plate including a longitudinally extending outer portion parallel to and engaging said first flange, a longitudinally extending inner portion parallel to and engaging said second flange, and an intermediate portion perpendicular to and connecting said outer and inner portions, said intermediate portion providing a longitudinally extending and outwardly facing gasket mounting surface, said outer portion providing a longitudinally extending clip portion receivably engaging said first flange, said inner portion providing a longitudinally extending clip portion receivably engaging said second flange, and said intermediate portion also providing, intermediate its edges, a longitudinally extending, laterally narrow slot, and a gasket mounted on said mounting surface to extend longitudinally therealong, said gasket including a longitudinally extending and inwardly projecting portion engaging into said slot to secure said gasket to said mounting surface, said door means being proportioned and mounted to close against said gasket.
Claim 3
Dependent Claim
181 words
In a refrigeration system, means providing a rectangular access opening comprising frame means bounding at least the sides of said opening and door means for closing said opening, said frame means including, for each side of said opening, an outer skin providing a longitudinally and inwardly extending first flange, an inner skin providing a longitudinally and outwardly extending second flange parallel to said first flange, said second flange being offset from said first flange toward the opposite side of said opening, a jamb trim plate disposed between and engaging said flanges, said trim plate including a longitudinally extending outer portion parallel to and engaging said first flange, a longitudinally extending inner portion parallel to and engaging said second flange, and an intermediate portion perpendicular to and connecting said outer and inner portions, said intermediate portion providing a longitudinally extending and outwardly facing gasket mounting surface, a gasket mounted against and extending longitudinally along said surface, and said door means including heater strip means extending longitudinally along the edge portions thereof to bear against said gasket when said door means is closed.
Claim 4
Dependent Claim
181 words
In a refrigeration system, means providing a rectangular access opening comprising frame means bounding at least the sides of said opening and door means for closing said opening, said frame means including, for each side of said opening, an outer skin providing a longitudinally and inwardly extending first flange, an inner skin providing a longitudinally and outwardly extending second flange parallel to said first flange, said second flange being offset from said first flange toward the opposite side of said opening, a jamb trim plate disposed between and engaging said flanges, said trim plate including a longitudinally extending outer portion parallel to and engaging said first flange, a longitudinally extending inner portion parallel to and engaging said second flange, and an intermediate portion perpendicular to and connecting said outer and inner portions, said intermediate portion providing a longitudinally extending and outwardly facing gasket mounting surface, a gasket mounted against and extending longitudinally along said surface, and said door means including heater strip means extending longitudinally along the edge portions thereof to bear against said gasket when said door means is closed.
Claim 5
Dependent Claim
181 words
In a refrigeration system, means providing a rectangular access opening comprising frame means bounding at least the sides of said opening and door means for closing said opening, said frame means including, for each side of said opening, an outer skin providing a longitudinally and inwardly extending first flange, an inner skin providing a longitudinally and outwardly extending second flange parallel to said first flange, said second flange being offset from said first flange toward the opposite side of said opening, a jamb trim plate disposed between and engaging said flanges, said trim plate including a longitudinally extending outer portion parallel to and engaging said first flange, a longitudinally extending inner portion parallel to and engaging said second flange, and an intermediate portion perpendicular to and connecting said outer and inner portions, said intermediate portion providing a longitudinally extending and outwardly facing gasket mounting surface, a gasket mounted against and extending longitudinally along said surface, and said door means including heater strip means extending longitudinally along the edge portions thereof to bear against said gasket when said door means is closed.
Claim 6
Dependent Claim
181 words
In a refrigeration system, means providing a rectangular access opening comprising frame means bounding at least the sides of said opening and door means for closing said opening, said frame means including, for each side of said opening, an outer skin providing a longitudinally and inwardly extending first flange, an inner skin providing a longitudinally and outwardly extending second flange parallel to said first flange, said second flange being offset from said first flange toward the opposite side of said opening, a jamb trim plate disposed between and engaging said flanges, said trim plate including a longitudinally extending outer portion parallel to and engaging said first flange, a longitudinally extending inner portion parallel to and engaging said second flange, and an intermediate portion perpendicular to and connecting said outer and inner portions, said intermediate portion providing a longitudinally extending and outwardly facing gasket mounting surface, a gasket mounted against and extending longitudinally along said surface, and said door means including heater strip means extending longitudinally along the edge portions thereof to bear against said gasket when said door means is closed.
Claim 7
Dependent Claim
32 words
The system of claim 1 in which said door means includes heater strip means extending longitudinally along the edge portions thereof to bear against said gasket when said door means is closed.
Claim 8
Dependent Claim
86 words
The system of claim 3 in which said heater strip means includes a channel strip secured to the inner side of said door means to extend along the edge portions thereof, said channel strip having a web section against said inner side and opposite side flanges exteNding inwardly from said inner side generally toward said gasket when said door means is closed, a heater wire disposed in said channel strip to extend longitudinally therealong, and a cover mounted on said channel strip and extending longitudinally therealong.
Claim 9
Dependent Claim
41 words
The system of claim 4 in which said cover is formed, in cross section, with a central domed cover portion and side flange portions which engage the side flanges of the channel strip to secure the cover on the channel strip.
Claim 10
Dependent Claim
86 words
The system of claim 2 in which said heater strip means includes a channel strip secured to the inner side of said door means to extend along the edge portions thereof, said channel strip having a web section against said inner side and opposite side flanges extending inwardly from said inner side generally toward said gasket when said door means is closed, a heater wire disposed in said channel strip to extend longitudinally therealong, and a cover mounted on said channel strip and extending longitudinally therealong.
Claim 11
Dependent Claim
41 words
The system of claim 6 in which said cover is formed, in cross section, with a central domed cover portion and side flange portions which engage the side flanges of the channel strip to secure the cover on the channel strip.
Claim 12
Dependent Claim
88 words
The system of claim 1 in which said gasket is formed to have a generally flat longitudinally extending base portion, said projecting portion for engaging said slot being generally centered in said base portion, said gasket having, at each of the lateral edges of said base portion, an inwardly and longitudinally extending projection which engages the gasket mounting surface, said gasket also having an outer web portion extending longitudinally and from side to side of the base portion and forming, with said base portion, a longitudinally extending chamber.
Claim 13
Dependent Claim
27 words
The system of claim 8 in which said outer web portion is formed to provide a longitudinally extending passageway in said chamber for receiving a magnetic strip.
References Cited (Backward Citations)
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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) | 1978-03-10 | 1978-09-09 | 1979-03-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-03-10 | 1982-09-09 | 1983-03-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-03-10 | 1986-09-09 | 1987-03-11 | $7700.00 | Window Closed / Lapsed |