Patent US4274813A successfully refreshed from Google Patents.
US4274813A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Swash plate type compressor
Assignee: Hitachi Ltd
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Filing: 1978-10-12
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Granted: 1981-06-23
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Expires: 1998-10-12
Abstract
Abstract In a swash plate type compressor, a partition plate member is located in a high pressure chamber of the compressor housing and divides the high pressure chamber into a plurality of small rooms which are communicated in series through a hole formed on the partition member. Each small room in the high pressure chamber and the partition member hole serves to reduce the resonant sound among the noise in a car or the like where the compressor is utilized.
Inventors
- 👤 Atsuo Kishi
- 👤 Toshio Sudo
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 16:36
CPC Classifications
F; F04; F04B; F04B39/00; F04B39/0027; F04B39/0055; F04B27/00; F04B27/08; F04B27/10; F04B27/1036; F04B27/12; F05; F05C; F05C2201/00; F05C2201/04; F05C2201/0469; F05C2201/0475
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
370 words
A swash plate type compressor comprising a cylindrical compressor housing having an inlet of coolant gas, a cylinder block assembly supported within said compressor housing and having a crank chamber communicated with the inlet at an axially central portion thereof, a drive shaft rotatably supported at its ends in said cylinder block assembly, said cylinder block assembly having a plurality of cylinder bores spaced radially outwardly from said drive shaft, front and rear side covers disposed at opposite ends of said cylinder block assembly, said side covers having a low pressure chamber at a radially central portion and a high pressure chamber spaced radially outwardly from the low pressure chamber, seal means disposed at one end of said drive shaft, front and rear valve plates interposed between said cylinder block assembly and respective ones of said side covers and having a first hole communicating the crank chamber with the low pressure chamber, second holes communicating the low pressure chamber with the cylinder bores and third holes communicating the cylinder bores with the high pressure chamber, a swash plate disposed in the crank chamber and keyed on said drive shaft so as to rotate therewith, and a plurality of pistons slidably arranged within the cylinder bores respectively, a rotating motion of said swash plate being converted to a reciprocating motion of said pistons, characterized in that the high pressure chamber is divided into a plurality of small rooms communicated in series, that the third holes communicate the cylinder bores with one end small room of the high pressure chamber, that the other end small room of the high pressure chamber in one of said side covers is communicated with an outlet of the compressed gas on the one of said side covers, and that the other end small room of the high pressure chamber in the other of said side covers is communicated with the high pressure chamber in the one of said side covers, and wherein said high pressure chamber is divided into said plurality of small rooms by a partition plate member having a U-shaped cross section, said partition plate member being inserted in the high pressure chamber so as to cover the third holes of said valve plates.
Claim 2
Dependent Claim
370 words
A swash plate type compressor comprising a cylindrical compressor housing having an inlet of coolant gas, a cylinder block assembly supported within said compressor housing and having a crank chamber communicated with the inlet at an axially central portion thereof, a drive shaft rotatably supported at its ends in said cylinder block assembly, said cylinder block assembly having a plurality of cylinder bores spaced radially outwardly from said drive shaft, front and rear side covers disposed at opposite ends of said cylinder block assembly, said side covers having a low pressure chamber at a radially central portion and a high pressure chamber spaced radially outwardly from the low pressure chamber, seal means disposed at one end of said drive shaft, front and rear valve plates interposed between said cylinder block assembly and respective ones of said side covers and having a first hole communicating the crank chamber with the low pressure chamber, second holes communicating the low pressure chamber with the cylinder bores and third holes communicating the cylinder bores with the high pressure chamber, a swash plate disposed in the crank chamber and keyed on said drive shaft so as to rotate therewith, and a plurality of pistons slidably arranged within the cylinder bores respectively, a rotating motion of said swash plate being converted to a reciprocating motion of said pistons, characterized in that the high pressure chamber is divided into a plurality of small rooms communicated in series, that the third holes communicate the cylinder bores with one end small room of the high pressure chamber, that the other end small room of the high pressure chamber in one of said side covers is communicated with an outlet of the compressed gas on the one of said side covers, and that the other end small room of the high pressure chamber in the other of said side covers is communicated with the high pressure chamber in the one of said side covers, and wherein said high pressure chamber is divided into said plurality of small rooms by a partition plate member having a U-shaped cross section, said partition plate member being inserted in the high pressure chamber so as to cover the third holes of said valve plates.
Claim 3
Dependent Claim
27 words
The swash plate type compressor as set forth in claim 1, wherein said partition plate member is located in said high pressure chamber at the rear side.
Claim 4
Dependent Claim
28 words
The swash plate type compressor set forth in claim 1, wherein said partition plate member is located in said high pressure chambers at the front and rear side.
Claim 5
Dependent Claim
26 words
The swash plate type compressor set forth in claim 1, wherein more than two partition plate members are located in series in said high pressure chamber.
Claim 6
Dependent Claim
228 words
Swash plate type fluid compressor comprising: a compressor housing, a cylinder block assembly supported in said housing, said cylinder block assembly defining a piston accommodating space, a piston movably mounted in said cylinder space, a rotatably supported drive shaft, a swash plate carried by said drive shaft and drivingly connected to said piston to move said piston in response to rotation of the drive shaft, fluid inlet valve means for communicating low pressure fluid to said cylinder space, fluid outlet valve means for communicating high pressure fluid, after being pressurized by said piston, from said cylinder space, a high pressure chamber disposed in said compressor housing immediately downstream of the fluid outlet valve means, characterized in that partition plate member means are provided dividing said high pressure chamber into a plurality of small rooms communicated in series, one end small room of the high pressure chamber being in communication with said fluid outlet valve means and the other end small room of the high pressure chamber being in communication with an outlet of said high pressure chamber for the compressed fluid, whereby pressure pulsations and vibrations of said compressor are reduced over at least a portion of normal operating ranges of the compressor, and wherein said partition plate member means includes a single plate member press-fitted into said housing, said plate member having a hole therethrough for fluid.
Claim 7
Dependent Claim
228 words
Swash plate type fluid compressor comprising: a compressor housing, a cylinder block assembly supported in said housing, said cylinder block assembly defining a piston accommodating space, a piston movably mounted in said cylinder space, a rotatably supported drive shaft, a swash plate carried by said drive shaft and drivingly connected to said piston to move said piston in response to rotation of the drive shaft, fluid inlet valve means for communicating low pressure fluid to said cylinder space, fluid outlet valve means for communicating high pressure fluid, after being pressurized by said piston, from said cylinder space, a high pressure chamber disposed in said compressor housing immediately downstream of the fluid outlet valve means, characterized in that partition plate member means are provided dividing said high pressure chamber into a plurality of small rooms communicated in series, one end small room of the high pressure chamber being in communication with said fluid outlet valve means and the other end small room of the high pressure chamber being in communication with an outlet of said high pressure chamber for the compressed fluid, whereby pressure pulsations and vibrations of said compressor are reduced over at least a portion of normal operating ranges of the compressor, and wherein said partition plate member means includes a single plate member press-fitted into said housing, said plate member having a hole therethrough for fluid.
Claim 8
Dependent Claim
30 words
Compressor according to claim 5, wherein said partition plate member means consists of a single plate member press-fitted into said housing, said plate member having a hole therethrough for fluid.
Claim 9
Dependent Claim
42 words
Compressor according to claim 5, wherein said partition plate member means includes a plurality of separate plate members press-fitted into said housing, said plate members each having holes therethrough for communicating the fluid with the respective rooms bounded by the plate members.
Claim 10
Dependent Claim
24 words
Compressor according to claim 5, wherein said compressor is part of an air conditioning system in a car and said fluid is a coolant.
Claim 11
Dependent Claim
12 words
Compressor according to claim 5, wherein said partition plate member is U-shaped.
Claim 12
Dependent Claim
64 words
Compressor according to claim 5, wherein said housing includes a side cover disposed at one end of the cylinder block assembly, wherein a valve plate is interposed between the cylinder block assembly and the side cover, said inlet and outlet valve means being disposed in said valve plate, and wherein said high pressure chamber is bounded by the valve plate and the side cover.
Claim 13
Dependent Claim
16 words
Compressor according to claim 10, wherein said single plate member is press-fitted into said side cover.
Claim 14
Dependent Claim
35 words
Compressor according to claim 11, wherein said cylinder block assembly defines a plurality of said piston accommodating spaces, and wherein a corresponding plurality of said pistons are movably mounted in respective ones of said spaces.
Claim 15
Dependent Claim
22 words
Compressor according to claim 12, wherein said single plate member extends over the outlet valve means of a plurality of said spaces.
Claim 16
Dependent Claim
17 words
Compressor according to claim 12, wherein a separate plate member is associated with each of said spaces.
Claim 17
Dependent Claim
98 words
Compressor according to claim 5, wherein said housing includes a front and rear side cover disposed at the respective front and rear ends of the cylinder block assembly, wherein respective valve plates are interposed between the cylinder block assembly and said side covers, said inlet and outlet valve means being disposed in said valve plates, with a plurality of said cylinder spaces and pistons being provided, at least one space opening to each of the front and rear valve plates and side covers, and wherein said high pressure chambers are bounded by the valve plates and side covers.
Claim 18
Dependent Claim
41 words
Compressor according to claim 13, wherein the partition plate member means includes at least one single plate member press-fitted into each of the side covers, said single plate members each having a U-shaped cross section and a hole therethrough for fluid.
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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) | 1984-06-22 | 1984-12-22 | 1985-06-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-06-22 | 1988-12-22 | 1989-06-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-06-22 | 1992-12-22 | 1993-06-23 | $7700.00 | Window Closed / Lapsed |