US3755994A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Refrigerant drier
Assignee: Ford Motor Co
•
Filing: 1972-04-06
•
Granted: 1973-09-04
•
Expires: 1992-04-06
Abstract
Abstract A refrigerant receiver-drier comprising a metallic cartridge or cylinder having therein a desiccant-containing bag made of fabric and through which liquid refrigerant may flow. One portion of the bag occupies an end of the tank sealed by the welding of a cap thereon during manufacture of the receiver-drier. The bag and its contents are protected against the heat of such a welding operation by a sheet of metal foil secured to the bag and forming a heat shield.
Inventors
- 👤 B Bidiwala
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 05:18
CPC Classifications
F; F25; F25B; F25B43/00; F25B43/003
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
106 words
A refrigerant drier, comprising: a fluid-impervious, pressure-resistant metallic cartridge having means for ingress of refrigerant thereto and egress of refrigerant therefrom; cover means adapted to be secured to the cartridge by a welding operation; a desiccant-containing bag disposed within said cartridge and made of a fabric material of a type which can be deleteriously affected by the application of heat thereto during the welding operation; and means for protecting said bag against excessive heating during welding, said means comprising a thin sheet of metallic foil material fastened to the bag and covering that portion of the bag which would be subject to the heat of welding.
Claim 2
Dependent Claim
106 words
A refrigerant drier, comprising: a fluid-impervious, pressure-resistant metallic cartridge having means for ingress of refrigerant thereto and egress of refrigerant therefrom; cover means adapted to be secured to the cartridge by a welding operation; a desiccant-containing bag disposed within said cartridge and made of a fabric material of a type which can be deleteriously affected by the application of heat thereto during the welding operation; and means for protecting said bag against excessive heating during welding, said means comprising a thin sheet of metallic foil material fastened to the bag and covering that portion of the bag which would be subject to the heat of welding.
Claim 3
Dependent Claim
17 words
A drier in accordance with claim 1, and further characterized in that said sheet comprises aluminum foil.
Claim 4
Dependent Claim
48 words
A drier in accordance with claim 1 and further characterized in that said bag is stitched along one end thereof to retain the desiccant therein, and said sheet of foil is folded over said end of the bag and secured thereto by the stitches which seal the bag.
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) | 1976-09-03 | 1977-03-05 | 1977-09-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-09-03 | 1981-03-05 | 1981-09-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-09-03 | 1985-03-05 | 1985-09-04 | $7700.00 | Window Closed / Lapsed |