US3815752A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Refrigerant filter-drier
Assignee: Sporlan Valve Co
•
Filing: 1972-03-02
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Granted: 1974-06-11
•
Expires: 1992-03-02
Abstract
Abstract A filter-drier for refrigeration systems which includes a bed of adsorbent material contained in a housing, and a wire form of substantially conical or cylindrical shape disposed in the housing downstream of the adsorbent material bed, the wire form, when a substantially conical shape, having its larger end arranged toward the housing outlet and its relatively smaller end disposed toward the adsorbent material bed. A filter media of inorganic fibrous material is disposed in the wire form and assumes substantially the shape of the wire form. A pad of inorganic fibrous material is located adjacent to and downstream of the filter media contained in the wire form, and is held against the housing by the wire form to provide a seal to assure flow through the filter media. In the preferred embodiment, the filter media contained in the wire form and the pad are of fiberglass, and the wire form is a compression spring. The wire form is secured in an outlet housing section so that such section constitutes a self-contained subassembly, while the adsorbent material bed is contained by a foraminate structure that is secured to an inlet housing section so that such section constitutes a self-contained subassembly also. The two selfcontained subassemblies are placed together and joined by a single weld.
Inventors
- 👤 J Hoffman
- 👤 A Schelich
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 13:12
CPC Classifications
F; F25; F25B; F25B43/00; F25B43/003; B; B01; B01D; B01D24/00; B01D24/02; B01D24/10; B01D27/00; B01D27/02; B01D29/00; B01D29/01; B01D53/00; B01D53/26; Y; Y10; Y10S; Y10S210/00; Y10S210/06
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
242 words
A filter-drier for refrigeration systems, comprising: a. a housing having an inlet at one end and an outlet at the other end, b. an adsorbent material bed contained in the housing, c. an elongate, hollow wire form disposed in the housing downstream of the adsorbent material bed, the wire form having one end arranged toward the outlet and its other end disposed toward the adsorbent material bed, d. a filter media of inorganic fibrous material disposed in the wire form and assuming the shape of the wire form, the filter media extending substantially across the housing, e. the adsorbent material bed being located adjacent the housing inlet and spaced from the housing outlet, f. the wire form extending substantially to and between the adsorbent material bed and the housing outlet, g. the filter media contained in the wire form being of fiberglass having a density within the range of substantially 0.5 grams per cubic inch to substantially 5.0 grams per cubic inch, h. a pad of fiberglass having a density within the same range as that fiberglass contained in the wire form, located adjacent to and downstream of the filter media contained in the wire form, and pressed against the housing to assure flow through the filter media, and i. the outlet pad being impregnated with a resin binder and having a greater amount of binder on its outlet side to seal off any fibers that break away from the filter media.
Claim 2
Dependent Claim
242 words
A filter-drier for refrigeration systems, comprising: a. a housing having an inlet at one end and an outlet at the other end, b. an adsorbent material bed contained in the housing, c. an elongate, hollow wire form disposed in the housing downstream of the adsorbent material bed, the wire form having one end arranged toward the outlet and its other end disposed toward the adsorbent material bed, d. a filter media of inorganic fibrous material disposed in the wire form and assuming the shape of the wire form, the filter media extending substantially across the housing, e. the adsorbent material bed being located adjacent the housing inlet and spaced from the housing outlet, f. the wire form extending substantially to and between the adsorbent material bed and the housing outlet, g. the filter media contained in the wire form being of fiberglass having a density within the range of substantially 0.5 grams per cubic inch to substantially 5.0 grams per cubic inch, h. a pad of fiberglass having a density within the same range as that fiberglass contained in the wire form, located adjacent to and downstream of the filter media contained in the wire form, and pressed against the housing to assure flow through the filter media, and i. the outlet pad being impregnated with a resin binder and having a greater amount of binder on its outlet side to seal off any fibers that break away from the filter media.
Claim 3
Dependent Claim
240 words
In a filter-drier for refrigeration systems, comprising: a. a housing including an inlet housing section and an outlet housing section, the inlet housing section being provided with an inlet, and the outlet housing section being provided with an outlet, b. the housing sections having compatible housing rims that are joined, c. an elongate, hollow wire form secured in the outlet housing section with one end arranged toward the outlet and with the other end arranged toward the opening defined by the outlet housing section rim, d. a filter media of inorganic fibrous material contained in the wire form and assuming the shape of the wire form, the wire form holding the filter media in the outlet housing section, e. the outlet housing section constituting a self-contained subassembly, f. the filter media contained in the wire form being of fiberglass having a density within the range of substantially 0.5 grams per cubic inch to substantially 5.0 grams per cubic inch, g. the wire form being a compression spring, h. a pad of fiberglass having a density within the range as that contained in the wire form, located adjacent to and downstream of the fiberglass contained in the wire form, and i. the outlet pad being impregnated with a resin binder and having a greater amount of binder providing a continuous edge to edge binder coating on its outlet side to seal off any fibers that break away from the filter media.
Claim 4
Dependent Claim
240 words
In a filter-drier for refrigeration systems, comprising: a. a housing including an inlet housing section and an outlet housing section, the inlet housing section being provided with an inlet, and the outlet housing section being provided with an outlet, b. the housing sections having compatible housing rims that are joined, c. an elongate, hollow wire form secured in the outlet housing section with one end arranged toward the outlet and with the other end arranged toward the opening defined by the outlet housing section rim, d. a filter media of inorganic fibrous material contained in the wire form and assuming the shape of the wire form, the wire form holding the filter media in the outlet housing section, e. the outlet housing section constituting a self-contained subassembly, f. the filter media contained in the wire form being of fiberglass having a density within the range of substantially 0.5 grams per cubic inch to substantially 5.0 grams per cubic inch, g. the wire form being a compression spring, h. a pad of fiberglass having a density within the range as that contained in the wire form, located adjacent to and downstream of the fiberglass contained in the wire form, and i. the outlet pad being impregnated with a resin binder and having a greater amount of binder providing a continuous edge to edge binder coating on its outlet side to seal off any fibers that break away from the filter media.
Claim 5
Dependent Claim
211 words
In a filter-drier for refrigeration systems, comprising: a. a housing including an inlet housing section and an outlet housing section, the inlet housing section being provided with an inlet, and the outlet housing section being provided with an outlet, b. the housing sections having compatible housing rims that are joined, c. an adsorbent material bed in the inlet housing section, d. a foraminate means containing the adsorbent material bed and fixed to the inlet housing section to provide a self-contained subassembly, e. an elongate, hollow wire form is secured in the outlet housing section with one end arranged toward the outlet and with the other end arranged toward the opening defined by the outlet housing section rim, f. a filter media of inorganic fibrous material is contained in the wire form and assumes the shape of the wire form, g. the outlet housing section constituting a self-contained subassembly, h. the foraminate means being a pair of spaced, perforated plates extending across the housing and containing the adsorbent material bed therebetween, the perforated plate downstream of the adsorbent material bed being secured to the inlet housing section to provide the self-contained subassembly, and i. the said other end of the wire form engaging and being compressed against the said one perforated plate.
Claim 6
Dependent Claim
211 words
In a filter-drier for refrigeration systems, comprising: a. a housing including an inlet housing section and an outlet housing section, the inlet housing section being provided with an inlet, and the outlet housing section being provided with an outlet, b. the housing sections having compatible housing rims that are joined, c. an adsorbent material bed in the inlet housing section, d. a foraminate means containing the adsorbent material bed and fixed to the inlet housing section to provide a self-contained subassembly, e. an elongate, hollow wire form is secured in the outlet housing section with one end arranged toward the outlet and with the other end arranged toward the opening defined by the outlet housing section rim, f. a filter media of inorganic fibrous material is contained in the wire form and assumes the shape of the wire form, g. the outlet housing section constituting a self-contained subassembly, h. the foraminate means being a pair of spaced, perforated plates extending across the housing and containing the adsorbent material bed therebetween, the perforated plate downstream of the adsorbent material bed being secured to the inlet housing section to provide the self-contained subassembly, and i. the said other end of the wire form engaging and being compressed against the said one perforated plate.
Claim 7
Dependent Claim
41 words
In a filter-drier as defined in claim 3, in which: j. the wire form is a compression spring, and k. the said one perforated plate includes a projection interfitting the said other end of the compression spring to position the spring.
Claim 8
Dependent Claim
80 words
In a filter-drier as defined in claim 3, in which: j. means is provided downstream of the filter media to assure flow through the filter media, k. a pad of inorganic fibrous material is located adjacent to and downstream of the filter media contained in the wire form, and l. the filter media contained in the wire form and the pad are of fiberglass having a density within the range of substantially 0.5 to substantially 5.0 grams per cubic inch.
Claim 9
Dependent Claim
167 words
In a filter-drier for refrigeration systems, comprising: a. a housing including an inlet housing section and an outlet housing section, the inlet housing section being provided with an inlet, and the outlet housing section being provided with an outlet, the housing sections having compatible housing rims that are joined, b. an elongate, hollow wire form secured in the outlet housing section with one end arranged toward the outlet and with the other end arranged toward the opening defined by the outlet housing section rim, c. a filter media of inorganic fibrous material contained in the wire form and assuming the shape of the wire form, d. a perforated plate secured to the outlet housing section and retaining the wire form and its enclosed filter media to provide a self-contained subassembly, e. the wire form being a substantially cylindrical, compression spring, and f. the filter media contained in the spring being fiberglass having a density within the range of substantially 0.5 to substantially 5.0 grams per cubic inch.
Claim 10
Dependent Claim
167 words
In a filter-drier for refrigeration systems, comprising: a. a housing including an inlet housing section and an outlet housing section, the inlet housing section being provided with an inlet, and the outlet housing section being provided with an outlet, the housing sections having compatible housing rims that are joined, b. an elongate, hollow wire form secured in the outlet housing section with one end arranged toward the outlet and with the other end arranged toward the opening defined by the outlet housing section rim, c. a filter media of inorganic fibrous material contained in the wire form and assuming the shape of the wire form, d. a perforated plate secured to the outlet housing section and retaining the wire form and its enclosed filter media to provide a self-contained subassembly, e. the wire form being a substantially cylindrical, compression spring, and f. the filter media contained in the spring being fiberglass having a density within the range of substantially 0.5 to substantially 5.0 grams per cubic inch.
Claim 11
Dependent Claim
25 words
In a filter-drier as defined in claim 6, in which: g. the fiberglass filter media is a plurality of stacked pads compressed within the spring.
Claim 12
Dependent Claim
51 words
In a filter-drier as defined in claim 7, in which: h. the outlet pad is impregnated with a resin binder and having a greater amount of binder providing a continuous edge to edge binder coating on its outlet side to seal off any fibers that break away from the stacked pads.
Claim 13
Dependent Claim
114 words
In a filter-drier as defined in claim 6, in which: e. an adsorbent material bed in the inlet housing section, f. a pair of spaced, perforated plates extending across the inlet housing section, the adsorbent material bed being contained in the inlet housing section between the said pair of perforated plates, g. one of the last said pair of perforated plates downstream of the adsorbent material bed is secured to the inlet housing section to provide a self-contained subassembly, and h. the last said one perforated plate of the inlet housing section is axially spaced from the perforated plate secured to the outlet housing section to preclude blockage of the apertures in such plates.
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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) | 1977-06-10 | 1977-12-10 | 1978-06-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-06-10 | 1981-12-10 | 1982-06-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-06-10 | 1985-12-10 | 1986-06-11 | $7700.00 | Window Closed / Lapsed |