US4386859A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Compressors for refrigerant fluids
Assignee: Aspera SpA
•
Filing: 1981-06-15
•
Granted: 1983-06-07
•
Expires: 2001-06-15
Abstract
Abstract In a compressor for refrigerant fluids, the thrust bearing for a vertical crankshaft comprises, on the one hand, an annular element of a material with a low coefficient of friction, which is rotatable with a main journal above the shaft and has a flat lower radial surface, and comprises, on the other hand, a flat radial surface machined on an upper main bearing fixed in the compressor casing. The lower surface of the annular element bears upon the flat radial surface of the upper main bearing.
Inventors
- 👤 Norbert Andrione
- 👤 Fulvio Bandoli
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 23:16
CPC Classifications
F; F16; F16C; F16C9/00; F16C9/02; F04; F04B; F04B35/00; F04B35/04; F16C17/00; F16C17/04; F25; F25B; F25B31/00; F25B31/02; F05; F05C; F05C2201/00; F05C2201/04; F05C2201/0433; F05C2201/0436
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
159 words
A compressor for refrigerant fluids comprising a casing defining a horizontal cylinder of the compressor and having upper and lower main radial bearings, a crank shaft vertically mounted for rotation within said casing including upper and lower main journals rotatable in said upper and lower main bearings respectively and a crank pin disposed between said upper and lower main journals within said casing and an axial thrust bearing for supporting said shaft axially in said casing, said axial thrust bearing being comprised of a flat radial surface machine on said upper main bearing, an annular shoulder having a flat lower radial surface carried by said upper main journal for rotation therewith, an annular washer element of a material having a low coefficient of friction having flat upper and lower faces being interposed between said upper main bearing and said annular shoulder in engagement therewith and means for mutually engaging said washer and shoulder to impart rotation to said washer.
Claim 2
Dependent Claim
159 words
A compressor for refrigerant fluids comprising a casing defining a horizontal cylinder of the compressor and having upper and lower main radial bearings, a crank shaft vertically mounted for rotation within said casing including upper and lower main journals rotatable in said upper and lower main bearings respectively and a crank pin disposed between said upper and lower main journals within said casing and an axial thrust bearing for supporting said shaft axially in said casing, said axial thrust bearing being comprised of a flat radial surface machine on said upper main bearing, an annular shoulder having a flat lower radial surface carried by said upper main journal for rotation therewith, an annular washer element of a material having a low coefficient of friction having flat upper and lower faces being interposed between said upper main bearing and said annular shoulder in engagement therewith and means for mutually engaging said washer and shoulder to impart rotation to said washer.
Claim 3
Dependent Claim
61 words
A compressor as set forth in claim 1 wherein said washer has a peripheral radial projection and said annular shoulder is comprised of a resilient split ring engaged in a groove in said upper main journal, said ring having at one end of its circumference a downwardly bent appendage which engages said radial projection of said washer as a catch plate.
Claim 4
Dependent Claim
18 words
A compressor as claimed in claim 1 wherein said annular washer element is made from a synthetic material.
Claim 5
Dependent Claim
15 words
A compressor as claimed in claim 3 wherein said synthetic material is a phenolic resin.
Claim 6
Dependent Claim
20 words
A compressor as claimed in claims 3 or 4 wherein said synthetic material contains a filling of a solid lubricant.
References Cited (Backward Citations)
US2312596A
Cited
DE1601054U
Cited
DE1058317B
Cited
FR1413563A
Cited
US3295753A
Cited
US4111499A
Cited
US4099761A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1986-06-06 | 1986-12-06 | 1987-06-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-06-06 | 1990-12-06 | 1991-06-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-06-06 | 1994-12-06 | 1995-06-07 | $7700.00 | Window Closed / Lapsed |