US3675440A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Refrigerated display case
Assignee: Trane US Inc
•
Filing: 1970-12-03
•
Granted: 1972-07-11
•
Expires: 1990-12-03
Abstract
Abstract This is a refrigerated display case with a front opening for unimpeded access to the refrigerated area and a movable closure section rear opening to provide intermittent access to the refrigerated area. The case has a curtain of refrigerated air across the front access opening and air conduits along the side of he rear opening to provide recirculation of the refrigerated air. The case has a separate horizontal curtain of refrigerated air across the lower portion of the refrigerated space to provide two vertically adjacent zones of refrigeration within the refrigerated space. The case also has a curtain of nonrefrigerated air under the bottom of the refrigerated space to remove spillover cold air from the floor in front of the case.
Inventors
- 👤 Fayez F Ibrahim
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 00:18
CPC Classifications
A; A47; A47F; A47F3/00; A47F3/04; A47F3/0439; A47F3/0443; A47F3/0447
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
152 words
A refrigerated case of the type having an access opening in the front thereof for unimpeded access to material refrigerated within said case comprising: means for refrigerating said space, means for establishing an air curtain directed across said access opening and serving to oppose the passage of ambient air through said access opening into said refrigerated space, incLuding other means for establishing another air curtain within said refrigerated space and substantially horizontally in a plane extending substantially at right angles to said access opening, said latter curtain serving to divide said refrigerated space into separate vertically adjacent zones of refrigerated space, and including movable closure means in the rear of said refrigerated case providing access to said refrigeration space through said movable closure means, and having vertically extending refrigerated air ducts in the rear of said refrigerated case to provide for the vertical movement of refrigerated air outside of said refrigerated space.
Claim 2
Dependent Claim
152 words
A refrigerated case of the type having an access opening in the front thereof for unimpeded access to material refrigerated within said case comprising: means for refrigerating said space, means for establishing an air curtain directed across said access opening and serving to oppose the passage of ambient air through said access opening into said refrigerated space, incLuding other means for establishing another air curtain within said refrigerated space and substantially horizontally in a plane extending substantially at right angles to said access opening, said latter curtain serving to divide said refrigerated space into separate vertically adjacent zones of refrigerated space, and including movable closure means in the rear of said refrigerated case providing access to said refrigeration space through said movable closure means, and having vertically extending refrigerated air ducts in the rear of said refrigerated case to provide for the vertical movement of refrigerated air outside of said refrigerated space.
Claim 3
Dependent Claim
151 words
A refrigerated case of the type having an insulated bottom, a movable section back wall, and an insulated top extending above a refrigerated display space said display space being open at the front, means establishing a vertical curtain of refrigerated air adjacent the open front of said display space, means for establishing a horizontal curtain of refrigerated air adjacent the bottom of said display space, whereby two vertically adjacent zones of refrigerated space are provided, in which the cases are arranged in end-to-end relation to provide a continuous extended display space having two vertically displaced horizontal zones of refrigerated space, in which the lower of the two vertically displaced zones is maintained at a lower temperature than the upper of said two zones, and including vertically extending refrigerated air ducts in the rear of said refrigerated case to provide for the vertical movement of refrigerated air outside of said refrigerated space.
Claim 4
Dependent Claim
151 words
A refrigerated case of the type having an insulated bottom, a movable section back wall, and an insulated top extending above a refrigerated display space said display space being open at the front, means establishing a vertical curtain of refrigerated air adjacent the open front of said display space, means for establishing a horizontal curtain of refrigerated air adjacent the bottom of said display space, whereby two vertically adjacent zones of refrigerated space are provided, in which the cases are arranged in end-to-end relation to provide a continuous extended display space having two vertically displaced horizontal zones of refrigerated space, in which the lower of the two vertically displaced zones is maintained at a lower temperature than the upper of said two zones, and including vertically extending refrigerated air ducts in the rear of said refrigerated case to provide for the vertical movement of refrigerated air outside of said refrigerated space.
Claim 5
Dependent Claim
103 words
A refrigerated case of the type having an access opening in the front thereof for unimpeded access to material refrigerated within said case comprising: means for refrigerating said space, means for establishing an air curtain directed across said access opening and serving to oppose the passage of ambient air through said access opening into said refrigerated space, access opening in the rear of said refrigerated case providing access to said refrigerated space through said opening, and including vertically extending refrigerated air ducts in the rear of said refrigerated case to provide for the vertical movement of refrigerated air outside of said refrigerated space.
Claim 6
Dependent Claim
103 words
A refrigerated case of the type having an access opening in the front thereof for unimpeded access to material refrigerated within said case comprising: means for refrigerating said space, means for establishing an air curtain directed across said access opening and serving to oppose the passage of ambient air through said access opening into said refrigerated space, access opening in the rear of said refrigerated case providing access to said refrigerated space through said opening, and including vertically extending refrigerated air ducts in the rear of said refrigerated case to provide for the vertical movement of refrigerated air outside of said refrigerated space.
Claim 7
Dependent Claim
106 words
A refrigerated case of the type having an access opening in the front thereof for unimpeded access to material refrigerated within said case comprising: means for refrigerating said space, means for establishing an air curtain directed across said access opening and serving to oppose the passage of ambient air through said access opening into said refrigerated space, movable closure means in the rear of said refrigerated case providing access to said refrigeration space through said movable closure means, and including vertically extending refrigerated air ducts in the rear of said refrigerated case to provice for the vertical movement of refrigerated air outside of said refrigerated space.
Claim 8
Dependent Claim
106 words
A refrigerated case of the type having an access opening in the front thereof for unimpeded access to material refrigerated within said case comprising: means for refrigerating said space, means for establishing an air curtain directed across said access opening and serving to oppose the passage of ambient air through said access opening into said refrigerated space, movable closure means in the rear of said refrigerated case providing access to said refrigeration space through said movable closure means, and including vertically extending refrigerated air ducts in the rear of said refrigerated case to provice for the vertical movement of refrigerated air outside of said refrigerated space.
Claim 9
Dependent Claim
131 words
A refrigerated case of the type having an access opening in the front thereof for unimpeded access to material refrigerated within said case comprising: means for refrigerating said space, means for establishing an air curtain directed across said access opening and serving to oppose the passage of ambient air through said access opening into said refrigerated space, and including other means for establishing another air curtain within said refrigerated space and directed substantially horizontally in a plane extending substantially at right angles to said access opening, said latter curtain serving to divide said refrigerated space into separate vertically adjacent zones of refrigerated space, and including vertically extending refrigerated air ducts in the rear of said refrigerated case to provide for the vertical movement of refrigerated air outside of said refrigerated space.
Claim 10
Dependent Claim
131 words
A refrigerated case of the type having an access opening in the front thereof for unimpeded access to material refrigerated within said case comprising: means for refrigerating said space, means for establishing an air curtain directed across said access opening and serving to oppose the passage of ambient air through said access opening into said refrigerated space, and including other means for establishing another air curtain within said refrigerated space and directed substantially horizontally in a plane extending substantially at right angles to said access opening, said latter curtain serving to divide said refrigerated space into separate vertically adjacent zones of refrigerated space, and including vertically extending refrigerated air ducts in the rear of said refrigerated case to provide for the vertical movement of refrigerated air outside of said refrigerated space.
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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) | 1975-07-11 | 1976-01-10 | 1976-07-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-07-11 | 1980-01-10 | 1980-07-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-07-11 | 1984-01-10 | 1984-07-11 | $7700.00 | Window Closed / Lapsed |