US3833318A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rotary compressor
Assignee: Toyota Industries Corp
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Filing: 1973-06-20
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Granted: 1974-09-03
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Expires: 1993-06-20
Abstract
Abstract A rotary compressor having front, and rear housings positioned at the ends of a hollow shell, a horizontal cylinder disposed in the shell and having pressure plates attached to the front and rear ends thereof and further comprising a front housing means interposed between the front housing and the front pressure plate for defining a first front chamber connected by fluid passage means to said inlet port, between the inner wall of said front housing and the outer wall of said front housing means, and a second front chamber connected by fluid passage means to said suction chambers of said cylinder, between the inner wall of said front housing means and the outer face of said front pressure plate, said front housing means having a through-hole to connect said first and second front chambers, and channels adjacent to said oil reservoir to connect said first and second front chambers to said oil reservoir, and; A REAR HOUSING MEANS INTERPOSED BETWEEN THE REAR HOUSING AND THE REAR PRESSURE PLATE FOR DEFINING A FIRST REAR CHAMBER CONNECTED FLUID PASSAGE MEANS TO SAID INLET PORT, BETWEEN THE INNER WALL OF SAID REAR HOUSING AND THE OUTER WALL OF SAID REAR HOUSING MEANS, AND A SECOND REAR CHAMBER BY FLUID PASSAGE MEANS CONNECTED TO SAID SUCTION CHAMBERS OF SAID CYLINDER, BETWEEN THE INNER WALL OF SAID REAR HOUSING MEANS AND THE OUTER FACE OF SAID REAR PRESSURE PLATE, SAID REAR HOUSING MEANS HAVING A THROUGH-HOLE TO CONNECT SAID FIRST AND SECOND REAR CHAMBERS, AND CHANNELS ADJACENT TO SAID OIL RESERVOIR TO CONNECT SAID FIRST AND SECOND REAR CHAMBERS TO SAID OIL RESERVOIR.
Inventors
- 👤 S Nakayama
- 👤 M Kurahashi
- 👤 T Sugiura
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 15:54
CPC Classifications
F; F04; F04C; F04C29/00; F04C29/02; Y; Y10; Y10S; Y10S418/00; Y10S418/01
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
393 words
In a rotary compressor having a horizontal axially extending hollow shell defining an outermost casing which has a lubricant reservoir at the lowermost portion therein and an inlet port at an upper portion thereof for introducing refrigerant gas to be compressed, front and rear housings positioned at ends of the hollow shell, a horizontal cylinder stationarily disposed in the shell and having pressure plates attached to front and rear ends thereof to define a closed room within the cylinder, and a rotor eccentric and rotatable within the closed room of the cylinder and provided with a number of radial slots for slidably inserting vanes therein whereby the cylinder and the rotor define a space between the inner and outer surfaces thereof for compressing the refrigerating gas introduced therein, said space being separable by said vanes of the rotor into gas-tight suction chambers fluidly connected to the inlet port of the hollow shell and gastight compression chambers fluidly connected to an outlet port of the compressor for discharging the compressed refrigerating gas, the improvement comprising: a front housing means interposed between a front housing and the front pressure plate for defining a first front chamber fluidly connected to said inlet port, between the inner wall of said front housing and the outer wall of said front housing means, and a second front chamber fluidly connected to said suction chambers of said cylinder, between the inner wall of said front housing means and the outer face of said front pressure plate, said front housing means having a through-hole to connect said first and second front chambers, and channels adjacent to said oil reservoir to connect said first and second front chambers to said oil reservoir, and; a rear housing means interposed between the rear housing and the rear pressure plate for defining a first rear chamber fluidly connected to said inlet port, between the inner wall of said rear housing and the outer wall of said rear housing means, and a second rear chamber fluidly connected to said suction chambers of said cylinder, between the inner wall of said rear housing means and the outer face of said rear pressure plate, said rear housing means having a through-hole to connect said first and second rear chambers, and channels adjacent to said oil reservoir to connect said first and second rear chambers to said oil reservoir.
Claim 2
Dependent Claim
393 words
In a rotary compressor having a horizontal axially extending hollow shell defining an outermost casing which has a lubricant reservoir at the lowermost portion therein and an inlet port at an upper portion thereof for introducing refrigerant gas to be compressed, front and rear housings positioned at ends of the hollow shell, a horizontal cylinder stationarily disposed in the shell and having pressure plates attached to front and rear ends thereof to define a closed room within the cylinder, and a rotor eccentric and rotatable within the closed room of the cylinder and provided with a number of radial slots for slidably inserting vanes therein whereby the cylinder and the rotor define a space between the inner and outer surfaces thereof for compressing the refrigerating gas introduced therein, said space being separable by said vanes of the rotor into gas-tight suction chambers fluidly connected to the inlet port of the hollow shell and gastight compression chambers fluidly connected to an outlet port of the compressor for discharging the compressed refrigerating gas, the improvement comprising: a front housing means interposed between a front housing and the front pressure plate for defining a first front chamber fluidly connected to said inlet port, between the inner wall of said front housing and the outer wall of said front housing means, and a second front chamber fluidly connected to said suction chambers of said cylinder, between the inner wall of said front housing means and the outer face of said front pressure plate, said front housing means having a through-hole to connect said first and second front chambers, and channels adjacent to said oil reservoir to connect said first and second front chambers to said oil reservoir, and; a rear housing means interposed between the rear housing and the rear pressure plate for defining a first rear chamber fluidly connected to said inlet port, between the inner wall of said rear housing and the outer wall of said rear housing means, and a second rear chamber fluidly connected to said suction chambers of said cylinder, between the inner wall of said rear housing means and the outer face of said rear pressure plate, said rear housing means having a through-hole to connect said first and second rear chambers, and channels adjacent to said oil reservoir to connect said first and second rear chambers to said oil reservoir.
Claim 3
Dependent Claim
104 words
A rotary compressor as defined in claim 1, further characterized by passage means defined by the inner walls of said hollow shell and said front and rear housing, and the outer walls of said cylinder, said front and rear pressure plates, and said front and rear housing means, said passage means providing an axial fluid connection between said first front and rear chambers while being connected to said inlet port whereby the flow of said refrigerant gas introduced from said inlet port is divided into two branches in opposite directions reaching said respective first chambers by being changed by an angle of substaNtially 90*.
Claim 4
Dependent Claim
32 words
A rotary compressor as defined in claim 2, wherein the connection of said passage means to said inlet port is provided at one half of the substantial length of said passage means.
Claim 5
Dependent Claim
48 words
A rotary compressor as defined in claim 2, wherein said front and rear housing means have recesses at a portion of the periphery of said housing means, respectively, thereby to direct said refrigerant gas from said passage means toward the bottoms of said frist front and rear chambers.
Claim 6
Dependent Claim
29 words
A rotary compressor as defined in claim 4, wherein said through-holes of said front and rear housing means are provided adjacent to the tops of said respective first chambers.
Claim 7
Dependent Claim
49 words
A rotary compressor as defined in claim 4, wherein respective sectional areas of said first chambers taken perpendicular to the direction of said refrigerant gas is larger than the sectional area of said passage means taken perpendicular to the direction of said refrigerant gas flowing in said passage means.
Claim 8
Dependent Claim
55 words
A rotary compressor as defined in claim 2, wherein said two branches of the refrigerant gas are introduced into the end of said compressing chamber through inlet holes of said respective pressure plates, said inlet holes directing said refrigerant gas branches to collide with each other at approximately the center portion of said compressing chamber.
Claim 9
Dependent Claim
23 words
A rotary compressor as defined in claim 1, wherein said front housing means provide a housing for a bearing means supporting said rotor.
Claim 10
Dependent Claim
35 words
A rotary compressor as defined in claim 1, wherein said second front and rear chambers have respective vertically sectional areas larger than the opening areas of the through-holes of said front and rear housing means.
Claim 11
Dependent Claim
60 words
A rotary compressor as defined in claim 1, wherein said second front and rear chambers are fluidly connected to said suction chambers through-holes perforated in said pressure plates respectively, and wherein said through-holes of said front and rear housing means and said holes of said pressure plates are circumferentially out of alignment, with respect to the center of said shaft.
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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) | 1977-09-02 | 1978-03-04 | 1978-09-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-09-02 | 1982-03-04 | 1982-09-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-09-02 | 1986-03-04 | 1986-09-03 | $7700.00 | Window Closed / Lapsed |