US3736076A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Compressor lubrication system
Assignee: CARDINAL COMPRESSOR CORP
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Filing: 1972-03-01
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Granted: 1973-05-29
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Expires: 1992-03-01
Abstract
Abstract A refrigerant compressor has a vertically extending crankshaft with its lower end in an oil sump. An off-center bore extends vertically within the crankshaft, and is connected through radial bores to the bearings. The bottom of the off-center bore is connected to the outlet of an oil pump formed in the bottom of the crankshaft. The inlet of the oil pump is connected to the oil in the sump. A gas pump is formed in the lower portion of the crankshaft above the oil pump. The gas pump has its inlet connected to the inlet of the oil pump, and has its outlet connected through a radial bore in the crankshaft to the space above the sump. Another gas pump is formed in the upper portion of the crankshaft and has its inlet connected to the top of the off-center bore, and its outlet within the interior of a motor compartment above the off-center bore.
Inventors
- 👤 R W Ayling
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 00:50
CPC Classifications
F; F04; F04B; F04B39/00; F04B39/02; F04B39/0223; F04B39/023; F04B39/0238; F04B39/0246
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
142 words
In a refrigerant compressor having a shell with an oil sump in its bottom, having a crankshaft extending upwardly above said sump with its bottom within said sump, said crankshaft having a central bore in its lower portion connecting with said sump, having a longitudinal off-center bore, having a radial bore extending from said off-center bore to said central bore, and having a second radial bore above said first mentioned radial bore with its outer end connecting with the interior of said shell above said sump and with its inner end adjacent to the axis of said crankshaft, the improvement comprising: the provision of passage means including constriction means providing substantially more resistance to flow therethrough than through said central and said first mentioned radial bores connecting said inner end of said second radial bore to the top of said central bore.
Claim 2
Dependent Claim
142 words
In a refrigerant compressor having a shell with an oil sump in its bottom, having a crankshaft extending upwardly above said sump with its bottom within said sump, said crankshaft having a central bore in its lower portion connecting with said sump, having a longitudinal off-center bore, having a radial bore extending from said off-center bore to said central bore, and having a second radial bore above said first mentioned radial bore with its outer end connecting with the interior of said shell above said sump and with its inner end adjacent to the axis of said crankshaft, the improvement comprising: the provision of passage means including constriction means providing substantially more resistance to flow therethrough than through said central and said first mentioned radial bores connecting said inner end of said second radial bore to the top of said central bore.
Claim 3
Dependent Claim
29 words
The invention claimed in claim 1 in which: said constriction means comprises an orifice on the axis of said crankshaft below said inner end of said second radial bore.
Claim 4
Dependent Claim
25 words
The invention claimed in claim 2 in which said crankshaft has a counterweight thereon, and in which: said second radial bore extends through said counterweight.
Claim 5
Dependent Claim
25 words
The invention claimed in claim 1 in which said crankshaft has a counterweight thereon, and in which: said second radial bore extends through said counterweight.
Claim 6
Dependent Claim
59 words
The invention claimed in claim 4 in which: there is provided a transverse bore extending through said crankshaft, connected to the top of said off-center bore, and crossing said axis, and there is provided a longitudinal passage at the surface of said crankshaft connected to said transverse bore, and having an open end at the top of said crankshaft.
Claim 7
Dependent Claim
59 words
The invention claimed in claim 3 in which: there is provided a transverse bore extending through said crankshaft, connected to the top of said off-center bore, and crossing said axis, and there is provided a longitudinal passage at the surface of said crankshaft connected to said transverse bore, and having an open end at the top of said crankshaft.
Claim 8
Dependent Claim
59 words
The invention claimed in claim 2 in which: there is provided a transverse bore extending through said crankshaft, connected to the top of said off-center bore, and crossing said axis, and there is provided a longitudinal passage at the surface of said crankshaft connected to said transverse bore, and having an open end at the top of said crankshaft.
Claim 9
Dependent Claim
59 words
The invention claimed in claim 1 in which: there is provided a transverse bore extending through said crankshaft, connected to the top of said off-center bore, and crossing said axis, and there iS provided a longitudinal passage at the surface of said crankshaft connected to said transverse bore, and having an open end at the top of said crankshaft.
Claim 10
Dependent Claim
72 words
The invention claimed in claim 8 in which said compressor has the rotor of an electric motor on the upper portion of said crankshaft, and in which: there is provided a keyway in said crankshaft and said rotor opposite said off-center bore, there is provided a hollow key in said keyway, and in which: said longitudinal passage comprises a portion of said keyway below said key and the opening within said key.
Claim 11
Dependent Claim
72 words
The invention claimed in claim 7 in which said compressor has the rotor of an electric motor on the upper portion of said crankshaft, and in which: there is provided a keyway in said crankshaft and said rotor opposite said off-center bore, there is provided a hollow key in said keyway, and in which: said longitudinal passage comprises a portion of said keyway below said key and the opening within said key.
Claim 12
Dependent Claim
72 words
The invention claimed in claim 6 in which said compressor has the rotor of an electric motor on the upper portion of said crankshaft, and in which: there is provided a keyway in said crankshaft and said rotor opposite said off-center bore, there is provided a hollow key in said keyway, and in which: said longitudinal passage comprises a portion of said keyway below said key and the opening within said key.
Claim 13
Dependent Claim
72 words
The invention claimed in claim 5 in which said compressor has the rotor of an electric motor on the upper portion of said crankshaft, and in which: there is provided a keyway in said crankshaft and said rotor opposite said off-center bore, there is provided a hollow key in said keyway, and in which: said longitudinal passage comprises a portion of said keyway below said key, and the opening within said key.
Claim 14
Dependent Claim
106 words
In a refrigerant compressor having a shell with an oil sump in its bottom, having a crankshaft extending upwardly above said sump with its bottom within said sump, having an off-center bore, and having oil pumping means connected to said sump and to said bore, the improvement comprising: the provision of a transverse bore within said crankshaft connected to the top of said bore and crossing the axis of said crankshaft, and the provision of means forming a longitudinal passage at the surface of said crankshaft opposite said off-center bore, connected to said transverse bore, and having an open end at the top of said crankshaft.
Claim 15
Dependent Claim
106 words
In a refrigerant compressor having a shell with an oil sump in its bottom, having a crankshaft extending upwardly above said sump with its bottom within said sump, having an off-center bore, and having oil pumping means connected to said sump and to said bore, the improvement comprising: the provision of a transverse bore within said crankshaft connected to the top of said bore and crossing the axis of said crankshaft, and the provision of means forming a longitudinal passage at the surface of said crankshaft opposite said off-center bore, connected to said transverse bore, and having an open end at the top of said crankshaft.
Claim 16
Dependent Claim
46 words
The invention claimed in claim 13 in which said compressor has the rotor of an electric motor on the upper portion of said crankshaft, and in which: said longitudinal passage comprises a keyway in said crankshaft and said rotor, and a hollow key within said keyway.
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) | 1976-05-28 | 1976-11-27 | 1977-05-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-05-28 | 1980-11-27 | 1981-05-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-05-28 | 1984-11-27 | 1985-05-29 | $7700.00 | Window Closed / Lapsed |