Patent US2956678A successfully refreshed from Google Patents.
Patent US3858406A successfully refreshed from Google Patents.
US3858406A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Refrigerant evaporator for air conditioner
Assignee: Nissan Motor Co Ltd
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Filing: 1973-09-04
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Granted: 1975-01-07
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Expires: 1993-09-04
Abstract
Abstract A refrigerant evaporator having a fin and tube assembly integral with an expansion valve and a back pressure valve.
Inventors
- 👤 Masao Izumi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 04:05
CPC Classifications
F; F25; F25B; F25B39/00; F25B39/02; F25B2341/00; F25B2341/06; F25B2341/068; F25B2341/0683; F25B2500/00; F25B2500/18; F25B41/00; F25B41/30; F25B41/31; F25B41/33; F25B41/335
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
96 words
A refrigerant evaporator for an air conditioner comprising: a fin and tube assembly having an end wall and a coil with inlet and outlet ends projecting through said end wall; said coil being formed from a plurality of U-shaped tubes interconnected by said end wall in a series arrangement, an expansion valve; a back pressure valve; and means connecting said expansion valve, said back pressure valve and said coil of said fin and tube assembly in a refrigerant flow relationship, said means being integral with said end wall, said expansion valve and said back pressure valve.
Claim 2
Dependent Claim
96 words
A refrigerant evaporator for an air conditioner comprising: a fin and tube assembly having an end wall and a coil with inlet and outlet ends projecting through said end wall; said coil being formed from a plurality of U-shaped tubes interconnected by said end wall in a series arrangement, an expansion valve; a back pressure valve; and means connecting said expansion valve, said back pressure valve and said coil of said fin and tube assembly in a refrigerant flow relationship, said means being integral with said end wall, said expansion valve and said back pressure valve.
Claim 3
Dependent Claim
23 words
A refrigerant evaporator as claimed in claim 1, wherein said end wall has conduits connecting said U-shaped tubes in series with each other.
Claim 4
Dependent Claim
41 words
A refrigerant evaporator as claimed in claim 2, wherein said end wall includes first and second plates joined face to face, said first plate defining openings therethrough, said second plate having grooves in alignment with said openings to form said conduits.
Claim 5
Dependent Claim
36 words
A refrigerant evaporator as claimed in claim 3, wherein said second plate includes a first recess communicating with the inlet end of said coil and a second recess communicating with the outlet end of said coil.
Claim 6
Dependent Claim
63 words
A refrigerant evaporator as claimed in claim 4, wherein said end wall includes a third plate joined to said second plate face to face, said third plate having a distributing recess in alignment with said first recess to define in conjunction therewith a distributing chamber and a collecting recess in alignment with said second recess to define in conjunction therewith a collecting chamber.
Claim 7
Dependent Claim
36 words
A refrigerant evaporator as claimed in claim 5, wherein said expansion valve has an outlet end which projects into said distributing chamber, and wherein said defroster has an inlet end which projects into said collecting chamber.
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) | 1978-01-06 | 1978-07-08 | 1979-01-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-01-06 | 1982-07-08 | 1983-01-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-01-06 | 1986-07-08 | 1987-01-07 | $7700.00 | Window Closed / Lapsed |