US4678415A
Expired / Lapsed
US
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Rotary type fluid machine
Assignee: Mitsubishi Heavy Industries Ltd
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Filing: 1985-05-24
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Granted: 1987-07-07
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Expires: 2005-05-24
Abstract
Abstract A rotary type fluid machine including a stationary spiral element and a revolving spiral element respectively having a substantially identical configuration and disposed therein 180 degrees apart from each other in mutually nested relationship, the revolving spiral element being adapted to revolve in solar motion relationship with respect to the stationary spiral element with a radius of revolutionary motion ρ, wherein the both spiral elements are respectively defined in profile with a radially outer curve segment consisting of an involute curve, a radially inner curve segment consisting of another involute curve in an inside arc having a radius R, and an arc having a radius r connecting smoothly the radially outer curve segment and the arc having the radius R, thereby ensuring a smallest possible error in the machining and thereby reducing a work period of time on the spiral elements; or wherein there is provided a small gap or clearance between the both spiral elements when installed in a mutual engagement relationship in such a manner that the whole inner and connection curves or part thereof defining the profile of the spiral elements may be caused to be departed out of the mutual engagement relationship in the range between marginal points for defining a due involute curve therefor, thereby ensuring a long service life and a high efficiency performance of the entire rotary type fluid machine.
Inventors
- 👤 Takahisa Hirano
- 👤 Kiyoshi Hagimoto
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 01:03
CPC Classifications
F; F04; F04C; F04C18/00; F04C18/02; F04C2/00; F04C2/02; F04C2/025
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
164 words
A rotary type fluid machine comprising stationary spiral means and revolving spiral means respectively having a substantially identical configuration and disposed 180 degrees apart from each other in mutually nested relationship, said revolving spiral means being adapted to revolve in solar motion relationship with said stationary spiral means with a radius ρ or revolutionary motion wherein said both spiral means are respectively formed by an outer curve consisting of an involute curve, an inner curve consisting of an involute curve having an inner arc of a radius R, and a connection curve having an arc of a radius r and connecting said outer curve and said arc having the radius R in a smooth manner so that fluid can be sucked into and delivered out of the fluid machine, characterized in that said both spiral means are respectively formed in accordance with the following equations; i.e., R=ρ+bβ+d r=bβ+d ##EQU8## wherein ##EQU9## and b is the radius of a base circle of said involute curve.
Claim 2
Dependent Claim
164 words
A rotary type fluid machine comprising stationary spiral means and revolving spiral means respectively having a substantially identical configuration and disposed 180 degrees apart from each other in mutually nested relationship, said revolving spiral means being adapted to revolve in solar motion relationship with said stationary spiral means with a radius ρ or revolutionary motion wherein said both spiral means are respectively formed by an outer curve consisting of an involute curve, an inner curve consisting of an involute curve having an inner arc of a radius R, and a connection curve having an arc of a radius r and connecting said outer curve and said arc having the radius R in a smooth manner so that fluid can be sucked into and delivered out of the fluid machine, characterized in that said both spiral means are respectively formed in accordance with the following equations; i.e., R=ρ+bβ+d r=bβ+d ##EQU8## wherein ##EQU9## and b is the radius of a base circle of said involute curve.
Claim 3
Dependent Claim
205 words
A rotary type fluid machine comprising stationary spiral means and revolving spiral means respectively having a substantially identical configuration and disposed 180 degrees apart from each other in mutually nested relationship, said revolving spiral means being adapted to revolve in solar motion relationship with said stationary spiral means with a radius ρ of revolutionary motion wherein said both spiral means are respectively formed by an outer curve consisting of an involute curve, an inner curve consisting of an involute curve having an inner arc of a radius R, and a connection curve having an arc of a radius r and connecting said outer curve and said arc having the radius R in a smooth manner so that fluid cna be sucked into and delivered out of the fluid machine, characterized in that there is provided a small gap or clearance between said both spiral means in such a manner as part or the whole of said inner curve and said connection curve between the marginal points of said involute curve determined with the parameter β cannot come in contact with each other, in accordance with the following equations; i.e., R=ρ+bβ+d r=bβ+d ##EQU10## wherein b is the radius of a base circle of said involute curve.
Claim 4
Dependent Claim
205 words
A rotary type fluid machine comprising stationary spiral means and revolving spiral means respectively having a substantially identical configuration and disposed 180 degrees apart from each other in mutually nested relationship, said revolving spiral means being adapted to revolve in solar motion relationship with said stationary spiral means with a radius ρ of revolutionary motion wherein said both spiral means are respectively formed by an outer curve consisting of an involute curve, an inner curve consisting of an involute curve having an inner arc of a radius R, and a connection curve having an arc of a radius r and connecting said outer curve and said arc having the radius R in a smooth manner so that fluid cna be sucked into and delivered out of the fluid machine, characterized in that there is provided a small gap or clearance between said both spiral means in such a manner as part or the whole of said inner curve and said connection curve between the marginal points of said involute curve determined with the parameter β cannot come in contact with each other, in accordance with the following equations; i.e., R=ρ+bβ+d r=bβ+d ##EQU10## wherein b is the radius of a base circle of said involute curve.
Claim 5
Dependent Claim
213 words
A rotary type fluid machine comprising stationary spiral means and revolving spiral means respectively having a substantially identical configuration and disposed 180 degrees apart from each other in mutually nested relationship, said revolving spiral means being adapted to revolve in solar motion relationship with said stationary spiral means with a radius ρ of revolutionary motion wherein said both spiral means are respectively formed by an outer curve consisting of an involute curve, an inner curve consisting of an involute curve having an inner arc of a radius R, and a connection curve having an arc of a radius r and connecting said outer curve and said arc having the radius R in a smooth manner so that fluid can be sucked into and delivered out of the fluid machine, characterized in that there is provided a small gap or clearance between said both spiral means in such a manner as part or the whole of said inner curve and said connection curve between two points determined with β+Δβ somewhat outwardly between the maginal points of said involute curve determined with the parameter β cannot come into contact with each other in accordance with the following equations; i.e., R=ρ+bβ+d r=bβ+d ##EQU11## wherein b is the radius of a base circle of said involute curve.
Claim 6
Dependent Claim
213 words
A rotary type fluid machine comprising stationary spiral means and revolving spiral means respectively having a substantially identical configuration and disposed 180 degrees apart from each other in mutually nested relationship, said revolving spiral means being adapted to revolve in solar motion relationship with said stationary spiral means with a radius ρ of revolutionary motion wherein said both spiral means are respectively formed by an outer curve consisting of an involute curve, an inner curve consisting of an involute curve having an inner arc of a radius R, and a connection curve having an arc of a radius r and connecting said outer curve and said arc having the radius R in a smooth manner so that fluid can be sucked into and delivered out of the fluid machine, characterized in that there is provided a small gap or clearance between said both spiral means in such a manner as part or the whole of said inner curve and said connection curve between two points determined with β+Δβ somewhat outwardly between the maginal points of said involute curve determined with the parameter β cannot come into contact with each other in accordance with the following equations; i.e., R=ρ+bβ+d r=bβ+d ##EQU11## wherein b is the radius of a base circle of said involute curve.
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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) | 1990-07-06 | 1991-01-05 | 1991-07-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-07-06 | 1995-01-05 | 1995-07-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-07-06 | 1999-01-05 | 1999-07-07 | $7700.00 | Window Closed / Lapsed |