US4029580A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Bidirectional flow filter-drier
Assignee: Sporlan Valve Co
•
Filing: 1976-10-05
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Granted: 1977-06-14
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Expires: 1996-10-05
Abstract
Abstract A filter-drier unit adapted for bidirectional flow in heat pump systems. This filter-drier unit includes an individual filter-drier in each compartment formed on opposite sides of a partition in a shell. A conduit connects the inlet of each filter-drier with the compartment other than the one in which the filter-drier is located. A check valve is connected to the outlet of each filter-drier to enable flow into the compartment in which the filter-drier is located and to preclude backflow, whereby flow into either one of the compartments through an associated shell port passes by the filter-drier in the said one compartment and through the inlet of the filter-drier in the other compartment, and thence into the said other compartment and out through its associated shell port. In one embodiment, the individual filter-driers and the fittings attaching the filter-driers to the partition are relatively laterally offset in the shell. In another embodiment, the individual filter-driers on opposite sides of the partition are disposed in substantial endwise alignment in the shell.
Inventors
- 👤 Harold T. Lange
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 10:12
CPC Classifications
F; F25; F25B; F25B43/00; F25B43/003; B; B01; B01D; B01D35/00; B01D35/02; B01D35/14; B01D35/15; B01D35/18; F25B13/00; Y; Y10; Y10S; Y10S210/00; Y10S210/06; Y10S210/07
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
15 words
A filter-drier unit for heat pump systems, comprising: a. a shell provided with flow ports,
Claim 2
Dependent Claim
15 words
A filter-drier unit for heat pump systems, comprising: a. a shell provided with flow ports,
Claim 3
Dependent Claim
90 words
b. a partition in the shell providing separate compartments, each of which operatively connects to a flow port, c. a filter-drier means located in each compartment, each filter-drier means including an inlet and an outlet, d. conduit means connecting the inlet of each filter-drier means with the compartment other than the one in which the filter-drier means is located, and e. a check valve means connected to the outlet of each filter-drier means to enable flow into the compartment in which the filter-drier means is located and to preclude backflow.
Claim 4
Dependent Claim
90 words
b. a partition in the shell providing separate compartments, each of which operatively connects to a flow port, c. a filter-drier means located in each compartment, each filter-drier means including an inlet and an outlet, d. conduit means connecting the inlet of each filter-drier means with the compartment other than the one in which the filter-drier means is located, and e. a check valve means connected to the outlet of each filter-drier means to enable flow into the compartment in which the filter-drier means is located and to preclude backflow.
Claim 5
Dependent Claim
87 words
A filter-drier unit as defined in claim 1, in which: f. the filter-drier means are spaced from the shell, whereby flow into either one of the compartments through the associated port passes by the filter-drier means in the said one compartment and through the inlet of the filer-drier means in the other compartment, and thence into the said other compartment through the outlet and check valve means of the filter-drier means in said other compartment, and then out of the associated port of the said other compartment.
Claim 6
Dependent Claim
21 words
A filter-drier unit as defined in claim 2, in which: g. the conduit means attaches the filter-drier means to the partition.
Claim 7
Dependent Claim
30 words
A filter-drier unit as defined in claim 2, in which: g. the conduit means includes passages through the partition that connect the inlets of the filter-drier means with the compartments.
Claim 8
Dependent Claim
52 words
A filter-drier unit as defined in claim 2, in which: g. the conduit means includes a fitting attaching each filter-drier means to the partition, each fitting having a passage connecting the inlet of the associated filter-drier means with the compartment other than the one in which said associated filter-drier means is located.
Claim 9
Dependent Claim
31 words
A filter-drier unit as defined in claim 5, in which: h. the filter-drier means and the fittings attaching the filter-drier means to the partition are relatively laterally offset in the shell.
Claim 10
Dependent Claim
38 words
A filter-drier unit as defined in claim 6, in which: i. the shell has a longitudinal center axis, and j. the filter-drier means and the fittings are relatively laterally offset from the longitudinal center axis of the shell.
Claim 11
Dependent Claim
87 words
A filter-drier unit as defined in claim 2, in which: g. the conduit means includes a fitting secured to the partition and to each filter-drier means, the fitting being provided with separate passages, one of the passages connecting the inlet of one filter-drier means with the compartment other than the one in which said one filter-drier means is located, and another of the passages connecting the inlet of the other filter-drier means with the compartment other than the one in which said other filter-drier means is located.
Claim 12
Dependent Claim
29 words
A filter-drier unit as defined in claim 8, in which: h. the filter-drier means on opposite sides of the partition are disposed in substantial endwise alignment in the shell.
Claim 13
Dependent Claim
35 words
A filter-drier unit as defined in claim 9, in which: i. the shell has a longitudinal center axis, and j. the filter-drier means are substantially aligned on the same longitudinal center axis of the shell.
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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) | 1980-06-13 | 1980-12-13 | 1981-06-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-06-13 | 1984-12-13 | 1985-06-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-06-13 | 1988-12-13 | 1989-06-14 | $7700.00 | Window Closed / Lapsed |