US3926281A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Compressor oil pump with filter
Assignee: Tecumseh Products Co
•
Filing: 1974-03-21
•
Granted: 1975-12-16
•
Expires: 1994-03-21
Abstract
Abstract A hermetic compressor having a vertical crankshaft, the lower end of which is journalled in an outboard bearing which serves as part of a housing for an oil pump. The pump includes an impeller in the crankshaft which pumps lubricating oil from a casing sump while also centrifugally separating particulate contaminants from the oil. The oil pump supplies oil continuously to the bearings of the compressor and intermittently to a filter assembly when the crankshaft is rotated.
Inventors
- 👤 Billy B Hannibal
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 10:42
CPC Classifications
F; F04; F04B; F04B39/00; F04B39/02; F04B39/0223; F04B39/023; F04B39/0261; F16; F16N; F16N7/00; F16N7/36; F16N7/366
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
243 words
An oil pump and filter device for a gas compressor comprising in combination a crankshaft with a lubricating oil passage extending therein from one end thereof, a sump for lubricating oil disposed adjacent the crankshaft, a housing with said one end of the crankshaft journalled therein, a discharge chamber formed in cooperation with said housing adjacent said one end of said crankshaft, a centrifugal impeller received in said discharge chamber and fixed to said crankshaft for rotation therewith, said impeller having an inlet chamber therein communicating with both lubricating oil in the sump and said discharge chamber for receiving lubricating oil from the sump and discharging such lubricating oil into said discharge chamber in response to rotation of said impeller by the crankshaft, said inlet chamber having a generally annular outer peripheral side wall extending concentric with the axis of rotation of said crankshaft, a filter adapted to receive oil from said inlet chamber, and a valve communicating with said filter and said inlet chamber and responsive to rotation of said impeller to intermittently discharge a portion of the lubricating oil in said inlet chamber into said filter at least once per revolution of said impeller, said valve having a generally axially extending passage in said impeller opening into said outer peripheral side wall and a port positioned to at least partially communicate with said generally axially extending passage once per revolution of said impeller, said last mentioned port communicating with said filter.
Claim 2
Dependent Claim
243 words
An oil pump and filter device for a gas compressor comprising in combination a crankshaft with a lubricating oil passage extending therein from one end thereof, a sump for lubricating oil disposed adjacent the crankshaft, a housing with said one end of the crankshaft journalled therein, a discharge chamber formed in cooperation with said housing adjacent said one end of said crankshaft, a centrifugal impeller received in said discharge chamber and fixed to said crankshaft for rotation therewith, said impeller having an inlet chamber therein communicating with both lubricating oil in the sump and said discharge chamber for receiving lubricating oil from the sump and discharging such lubricating oil into said discharge chamber in response to rotation of said impeller by the crankshaft, said inlet chamber having a generally annular outer peripheral side wall extending concentric with the axis of rotation of said crankshaft, a filter adapted to receive oil from said inlet chamber, and a valve communicating with said filter and said inlet chamber and responsive to rotation of said impeller to intermittently discharge a portion of the lubricating oil in said inlet chamber into said filter at least once per revolution of said impeller, said valve having a generally axially extending passage in said impeller opening into said outer peripheral side wall and a port positioned to at least partially communicate with said generally axially extending passage once per revolution of said impeller, said last mentioned port communicating with said filter.
Claim 3
Dependent Claim
32 words
The oil pump and filter device of claim 1 which also comprises a cover plate forming in cooperation with said housing said discharge chamber, said cover plate being secured to said housing.
Claim 4
Dependent Claim
29 words
The oil pump and filter device of claim 1 which also comprises a thrust bearing plate secured to said housing with the lower end of said crankshaft bearing thereon.
Claim 5
Dependent Claim
38 words
The oil pump and filter device of claim 2 which also comprises a thrust bearing plate with the lower end of said crankshaft bearing thereon, said thrust bearing plate being interposed between said housing and said cover plate.
Claim 6
Dependent Claim
41 words
The oil pump and filter device of claim 1 wherein said oil passage in the crankshaft continuously communicates with said discharge chamber whereby lubricating oil is continuously discharged from said discharge chamber through said oil passage to lubricate the gas compressor.
Claim 7
Dependent Claim
227 words
An oil pump and filter device for a gas compressor having a vertical crankshaft and a sump for lubricating oil disposed below the crankshaft, said oil pump and filter device comprising a housing defining at least in part a discharge chamber adjacent the lower end of said crankshaft, an impeller received in said discharge chamber and fixed to said crankshaft for rotation therewith, said impeller having an inlet chamber therein communicating with both lubricating oil in the sump and said discharge chamber for receiving lubricating oil from the sump and discharging such lubricating oil into said discharge chamber at a higher pressure than the oil in the sump in response to rotation of said impeller by the crankshaft, a bypass passage extending generally axially in said impeller, said bypass passage being in communication with said inlet chamber in the radially outermost part thereof relative to the axis of rotation of said impeller, a cover plate underlying said impeller and having a port therein positioned to intermittently communicate with said bypass passage in response to rotation of said impeller, and a filter means in communication with said port in said cover plate to receive lubricating oil discharged from said inlet chamber of said impeller through said bypass passage and to remove solid contaminants from such oil and retain such solid contaminants while returning filtered oil to said sump.
Claim 8
Dependent Claim
227 words
An oil pump and filter device for a gas compressor having a vertical crankshaft and a sump for lubricating oil disposed below the crankshaft, said oil pump and filter device comprising a housing defining at least in part a discharge chamber adjacent the lower end of said crankshaft, an impeller received in said discharge chamber and fixed to said crankshaft for rotation therewith, said impeller having an inlet chamber therein communicating with both lubricating oil in the sump and said discharge chamber for receiving lubricating oil from the sump and discharging such lubricating oil into said discharge chamber at a higher pressure than the oil in the sump in response to rotation of said impeller by the crankshaft, a bypass passage extending generally axially in said impeller, said bypass passage being in communication with said inlet chamber in the radially outermost part thereof relative to the axis of rotation of said impeller, a cover plate underlying said impeller and having a port therein positioned to intermittently communicate with said bypass passage in response to rotation of said impeller, and a filter means in communication with said port in said cover plate to receive lubricating oil discharged from said inlet chamber of said impeller through said bypass passage and to remove solid contaminants from such oil and retain such solid contaminants while returning filtered oil to said sump.
Claim 9
Dependent Claim
88 words
The oil pump and filter device of claim 6 wherein said inlet chamber comprises an annular groove in the lower end of the crankshaft and said impeller comprises at least one passage extending generally radially through the lower end of the crankshaft between and in communication with said inlet and discharge chambers and wherein oil to lubricate the gas pump is discharged from said discharge chamber through a passage extending through the lower end of the crankshaft and opening into a central portion of the lower end thereof.
Claim 10
Dependent Claim
21 words
The oil pump and filter device of claim 7 wherein the lower end of the crankshaft is journalled in said housing.
Claim 11
Dependent Claim
29 words
The oil pump and filter device of claim 8 which also comprises a thrust bearing plate carried by said housing with the lower end of said crankshaft bearing thereon.
Claim 12
Dependent Claim
72 words
The oil pump and filter device of claim 6 wherein said filter comprises a filter bag open at one end and closed at the other, and a tube received at one end in the open end of said bag and secured thereto, the other end of said tube being received in a passage in said cover plate whereby said filter is disposed externally of said cover plate and in said oil sump.
Claim 13
Dependent Claim
164 words
An oil pump and filter device for a gas compressor comprising in combination a crankshaft with a lubricating oil passage extending therein from one end thereof to conduct oil for the lubrication of the gas compressor, a sump for lubricating oil disposed adjacent the crankshaft, a centrifugal impeller fixed to said crankshaft for rotation therewith and communicating with both lubricating oil in the sump and said oil passage for discharging lubricating oil drawn from the sump into said oil passage in response to rotation of said impeller by the crankshaft, filter means adapted to receive oil from said impeller and to remove solid contaminants from such oil and retain such solid contaminants while returning filtered oil to said sump, and a valve communicating with said impeller and said filter means and responsive to rotation of said impeller to intermittently bypass a portion of the lubricating oil from said impeller via said filter means to said sump at least once per revolution of said impeller.
Claim 14
Dependent Claim
164 words
An oil pump and filter device for a gas compressor comprising in combination a crankshaft with a lubricating oil passage extending therein from one end thereof to conduct oil for the lubrication of the gas compressor, a sump for lubricating oil disposed adjacent the crankshaft, a centrifugal impeller fixed to said crankshaft for rotation therewith and communicating with both lubricating oil in the sump and said oil passage for discharging lubricating oil drawn from the sump into said oil passage in response to rotation of said impeller by the crankshaft, filter means adapted to receive oil from said impeller and to remove solid contaminants from such oil and retain such solid contaminants while returning filtered oil to said sump, and a valve communicating with said impeller and said filter means and responsive to rotation of said impeller to intermittently bypass a portion of the lubricating oil from said impeller via said filter means to said sump at least once per revolution of said impeller.
Claim 15
Dependent Claim
77 words
The oil pump and filter device of claim 11 wherein said filter means comprises a filter bag open at one end and closed at the other, and a tube received at one end in the open end of said bag and secured thereto, the other end of said tube communicating with said valve for conducting oil from said valve into the open end of said filter bag, said filter bag being disposed externally of said oil pump.
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) | 1978-12-15 | 1979-06-16 | 1979-12-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-12-15 | 1983-06-16 | 1983-12-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-12-15 | 1987-06-16 | 1987-12-16 | $7700.00 | Window Closed / Lapsed |