US3618771A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for drying refrigerant
Assignee: Akers Inc
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Filing: 1969-09-10
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Granted: 1971-11-09
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Expires: 1989-09-10
Abstract
Abstract The present invention relates to improved apparatus for drying the refrigerant in refrigeration systems such as automobile air conditioners and the like. A refrigerant permeable desiccant retainer formed of a rigid impervious material having a quantity of particulated or beaded solid desiccant disposed therein is attached within a closed container. The closed container is connected in a refrigeration system downstream of the refrigerant condenser so that liquefied refrigerant passes therethrough. The desiccant retainer prevents the desiccant from escaping from the container and obviates the use of sack-type retainers formed of cloth heretofore used.
Inventors
- 👤 Robert M Akers
- 👤 Harold L Westfall
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 23:44
CPC Classifications
F; F25; F25B; F25B43/00; F25B43/003; B; B60; B60H; B60H1/00; B60H1/32; B60H1/3204
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
220 words
Apparatus for drying refrigerant which comprises: a closed elongated cylindrical container having a refrigerant inlet connection and a refrigerant outlet connection in the top portion thereof; a feed tube connected to the refrigerant outlet connection and extending within said container to a point near the bottom thereof; a screen member attached to the lower end of said feed tube adjacent the bottom of said container; means for viewing refrigerant from outside said container at the point of connection of said feed tube to the refrigerant outlet connection; a refrigerant permeable desiccant retainer formed of a rigid impervious material having a quantity of solid desiccant disposed therein attached to said feed tube within said container, comprising: a cylindrical inner wall slidably disposed on said feed tube; a perforated annular bottom member attached to said annular wall and having an outer diameter substantially less than the inner diameter of said container; a cylindrical outer wall attached to said bottom member and having an outer diameter substantially less than the inner diameter of said container; and a perforated annular top member removably attached to said inner and outer walls and having an outer diameter substantially less than the inner diameter of said container; and a pair of annular felt pads disposed within said desiccant retainer respectively adjacent the top and bottom members thereof.
Claim 2
Dependent Claim
220 words
Apparatus for drying refrigerant which comprises: a closed elongated cylindrical container having a refrigerant inlet connection and a refrigerant outlet connection in the top portion thereof; a feed tube connected to the refrigerant outlet connection and extending within said container to a point near the bottom thereof; a screen member attached to the lower end of said feed tube adjacent the bottom of said container; means for viewing refrigerant from outside said container at the point of connection of said feed tube to the refrigerant outlet connection; a refrigerant permeable desiccant retainer formed of a rigid impervious material having a quantity of solid desiccant disposed therein attached to said feed tube within said container, comprising: a cylindrical inner wall slidably disposed on said feed tube; a perforated annular bottom member attached to said annular wall and having an outer diameter substantially less than the inner diameter of said container; a cylindrical outer wall attached to said bottom member and having an outer diameter substantially less than the inner diameter of said container; and a perforated annular top member removably attached to said inner and outer walls and having an outer diameter substantially less than the inner diameter of said container; and a pair of annular felt pads disposed within said desiccant retainer respectively adjacent the top and bottom members thereof.
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) | 1974-11-08 | 1975-05-10 | 1975-11-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-11-08 | 1979-05-10 | 1979-11-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-11-08 | 1983-05-10 | 1983-11-09 | $7700.00 | Window Closed / Lapsed |