US3904320A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Swash plate compressor
Assignee: Hitachi Ltd
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Filing: 1973-05-08
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Granted: 1975-09-09
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Expires: 1993-05-08
Abstract
Abstract A swash plate compressor for use in refrigerators operating with a refrigerant gas in which is previously mixed lubricating oil, characterized in that a crank case of the compressor is so arranged as to constitute part of a low pressure passage connected to the inlet side of the compressor, and said low pressure passage is communicated with portions of the compressor which requires the supply of lubricating oil.
Inventors
- 👤 Atsuo Kishi
- 👤 Takashi Degawa
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 23:25
CPC Classifications
F; F04; F04B; F04B27/00; F04B27/08; F04B27/10; F04B27/12; F04B27/1036; F04B27/109; F04B39/00; F04B39/06
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
203 words
A swash plate type compressor comprising: a casing, a pair of cylinder blocks disposed immediately adjacent one another at a separation plane in said casing, a drive shaft rotatably supported by said cylInder blocks for rotation about an axis extending transverse to said separation plane, a swash plate rotatable with said drive shaft and disposed in a crankcase formed by facing portions of said cylinder blocks, bearing means for rotatably supporting said drive shaft and swash plate being disposed in said crankcase, cylinder bores formed in said cylinder blocks for accommodating axial sliding movement of pistons disposed therein in response to rotation of said drive shaft and swash plate, and an inlet opening for supplying a fluid medium to said compressor for compression within said cylinder bores by said pistons, wherein said inlet opening extends from outside said casing directly into said crankcase at said separation plane so that lubricant contained in said fluid medium is supplied directly to said bearings, said inlet opening being formed by facing portions of said cylinder blocks, said facing portions extending from immediately adjacent said casing so as to direct said fluid medium and lubricant directly radially inwardly from said casing to said crankcase and bearing means.
Claim 2
Dependent Claim
203 words
A swash plate type compressor comprising: a casing, a pair of cylinder blocks disposed immediately adjacent one another at a separation plane in said casing, a drive shaft rotatably supported by said cylInder blocks for rotation about an axis extending transverse to said separation plane, a swash plate rotatable with said drive shaft and disposed in a crankcase formed by facing portions of said cylinder blocks, bearing means for rotatably supporting said drive shaft and swash plate being disposed in said crankcase, cylinder bores formed in said cylinder blocks for accommodating axial sliding movement of pistons disposed therein in response to rotation of said drive shaft and swash plate, and an inlet opening for supplying a fluid medium to said compressor for compression within said cylinder bores by said pistons, wherein said inlet opening extends from outside said casing directly into said crankcase at said separation plane so that lubricant contained in said fluid medium is supplied directly to said bearings, said inlet opening being formed by facing portions of said cylinder blocks, said facing portions extending from immediately adjacent said casing so as to direct said fluid medium and lubricant directly radially inwardly from said casing to said crankcase and bearing means.
Claim 3
Dependent Claim
32 words
A swash plate compressor as defined in claim 1, wherein the cylinder blocks each have three cylinder bores, and wherein three piston members are slidably inserted one each in said cylinder bores.
Claim 4
Dependent Claim
34 words
A swash plate compressor as defined in claim 2, wherein said cylindrical shell has a cylindrical shape over the full length thereof in the direction of the axis of rotation of the drive shaft.
Claim 5
Dependent Claim
28 words
A swash plate compressor as defined in claim 1, wherein an outlet for discharging compressed gas from said compressor is disposed at said plane separating said cylinder blocks.
Claim 6
Dependent Claim
42 words
A swash plate compressor as defined in claim 4, wherein all openings and passages of said compressor are arranged symmetrically with respect to said plane separating said cylinder blocks to effect symmetrical flow of refrigerant gas and the like through the compressor.
Claim 7
Dependent Claim
37 words
A compressor according to claim 1, wherein said bearing means and said swash plate are disposed in said crankcase at respective opposite sides of said separation plane so that lubricant is substantially symmetrically supplied to said bearings.
Claim 8
Dependent Claim
18 words
A compressor according to claim 6, wherein said cylinder blocks are symmetrical with respect to said separation plane.
Claim 9
Dependent Claim
26 words
A compressor according to claim 7, wherein an outlet for discharging all of the compressed fluid medium from said compressor is disposed at said separation plane.
Claim 10
Dependent Claim
45 words
A compressor according to claim 8, wherein all fluid medium openings and passages in said compressor are symmetrically arranged with respect to said separation plane such that flow of fluid medium through said compressor is symmetrical with resultant symmetrical thermal loadings of the compressor parts.
Claim 11
Dependent Claim
28 words
A compressor according to claim 6, wherein identical plate members with respective inlet and outlet openings are provided at respective oppositely facing outer ends of said cylinder blocks.
Claim 12
Dependent Claim
47 words
A compressor according to claim 10, wherein cover members are provided on the outer ends of said plate members which include hollow spaces serving as respective high and low pressure spaces for fluid passing through said compressor, said cover members having similar shaped hollow spaces formed therein.
Claim 13
Dependent Claim
16 words
A compressor according to claim 11, wherein said hollow spaces are formed as concentrical cylindrical spaces.
Claim 14
Dependent Claim
20 words
A compressor according to claim 12, wherein said casing exhibits an outer substantially cylindrical surface along the axial length thereof.
Claim 15
Dependent Claim
38 words
A compressor according to claim 1, wherein lubricating passages are provided which communicate low pressure passages of said compressor with lubricant using parts of said compressor that are located outside of said crankcase and inside of said casing.
Claim 16
Dependent Claim
100 words
A compressor according to claim 1, characterized in that a noise damping chamber is formed between said casing and an auxiliary cover fixed to the central portion of the outer pEriphery of said casing and characterized in that an outlet pipe for connecting the outlet side of the compressor with a refrigeration cycle is connected to said auxiliary cover and further an opening communicating with said noise damping chamber at one end and with a high pressure chamber of said compressor at the other end is formed in each of said cylinder blocks, thereby to form a high pressure passage.
Claim 17
Dependent Claim
22 words
A compressor according to claim 1, wherein said cylinder blocks are of similar shape such that they are interchangeable with one another.
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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) | 1978-09-08 | 1979-03-10 | 1979-09-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-09-08 | 1983-03-10 | 1983-09-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-09-08 | 1987-03-10 | 1987-09-09 | $7700.00 | Window Closed / Lapsed |