Patent US3782850A successfully refreshed from Google Patents.
US3782850A
Expired / Lapsed
US
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Energy transfer machine
Assignee: Garrett Corp
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Filing: 1971-08-09
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Granted: 1974-01-01
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Expires: 1991-08-09
Abstract
Abstract An energy transfer machine is disclosed including a casing enclosing a stator ring, the casing and ring conjointly defining a smooth wall, annular fluid passage extending about the axis of rotation between inlet and outlet passages formed in the casing. A rotor within the casing includes a blade cascade projecting in cantilever fashion into the annular fluid passage, each blade having leading and trailing edges extending generally parallel with the axis of rotation of the machine, the edge nearer the axis of rotation being longer than the edge further from the axis. The geometries and relative positions of the blades and annular fluid passage are such that the radial distance from the axis of rotation of the centroid of the meridional cross-section of the annular fluid passage is larger than the radial distance of at least the major portion of the edge nearer the rotational axis and smaller than the radial distance from the axis of rotation of at least the major portion of the edge further from the rotational axis. Machines according to the invention are also characterized by constructional features which minimize the number of castings required and thereby greatly simplify the fabrication and structure to minimize cost.
Inventors
- 👤 J Nancarrow
- 👤 H Egli
- 👤 F Burdette
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 06:06
CPC Classifications
F; F16; F16H; F16H41/00; F16H41/24; F16H41/26
Claims Analysis
Total Claims: 25
Claim 1
Independent Claim
103 words
A machine for transferring energy between a fluid medium and a shaft rotatable about an axis, comprising: a casing having inlet and outlet openings and enclosing a stator ring and defining therewith a vaneless fluid passage extending circumferentially about said axis; and a rotor mounted on said shaft and having blades projecting into said fluid passage, said blades having inner and outer edges relative to said axis, the radial distance from said axis to the centroid of the meridional cross-section of said fluid passage lying between the radial distances from said axis to at least major portions of said inner and outer edges.
Claim 2
Dependent Claim
103 words
A machine for transferring energy between a fluid medium and a shaft rotatable about an axis, comprising: a casing having inlet and outlet openings and enclosing a stator ring and defining therewith a vaneless fluid passage extending circumferentially about said axis; and a rotor mounted on said shaft and having blades projecting into said fluid passage, said blades having inner and outer edges relative to said axis, the radial distance from said axis to the centroid of the meridional cross-section of said fluid passage lying between the radial distances from said axis to at least major portions of said inner and outer edges.
Claim 3
Dependent Claim
18 words
A machine, as defined in claim 1, in which said inner edges are longer than said outer edges.
Claim 4
Dependent Claim
23 words
A machine, as defined in claim 1, in which at least one of said inner and outer edges extends parallel with said axis.
Claim 5
Dependent Claim
79 words
A machine, as defined in claim 1, in which the casing includes inlet and outlet passages communicating with said fluid passage through said inlet and outlet openings, said inlet passage being oriented to direct the fluid so that the absolute velocity thereof approaches the blade cascade approximately perpendicular to the direction of movement of said cascade, said outlet passage being oriented in approximate alignment with the direction of the absolute velocity of the exiting fluid approaching said outlet passage.
Claim 6
Dependent Claim
25 words
A machine, as defined in claim 1, in which the fluid moves away from said axis of rotation during its passage through the blade cascade.
Claim 7
Dependent Claim
24 words
A machine as defined in claim 1, in which the fluid moves toward said axis of rotation during its passage through the blade cascade.
Claim 8
Dependent Claim
164 words
A machine for transferring energy between a fluid medium and a rotatable shaft, comprising: a casing having a smooth interior wall surface defining a smooth-walled toroidal space about a central axis of rotation, said casing including fluid inlet and outlet openings; a block seal within said toroidal space separating said inlet and outlet openings; a stator ring mounted within said toroidal space and defining with said casing an annular fluid passage extending circumferentially about said axis of rotation, the meridional cross-section of said annular fluid passage having a centroid; and a rotor mounted on said shaft for rotation about said axis and including along its outer periphery a blade cascade, each blade having an inner edge and an outer edge, said inner edge being positioned closer to said axis than said outer edge, at least a major part of said inner edge lying radially inward of said centroid and at least a major part of said outer edge lying radially outward of said centroid.
Claim 9
Dependent Claim
164 words
A machine for transferring energy between a fluid medium and a rotatable shaft, comprising: a casing having a smooth interior wall surface defining a smooth-walled toroidal space about a central axis of rotation, said casing including fluid inlet and outlet openings; a block seal within said toroidal space separating said inlet and outlet openings; a stator ring mounted within said toroidal space and defining with said casing an annular fluid passage extending circumferentially about said axis of rotation, the meridional cross-section of said annular fluid passage having a centroid; and a rotor mounted on said shaft for rotation about said axis and including along its outer periphery a blade cascade, each blade having an inner edge and an outer edge, said inner edge being positioned closer to said axis than said outer edge, at least a major part of said inner edge lying radially inward of said centroid and at least a major part of said outer edge lying radially outward of said centroid.
Claim 10
Dependent Claim
46 words
A machine, as defined in claim 1, in which the projection of each blade on a meridional plane has a generally trapezoidal configuration and includes a tip, said stator ring including a surface immediately adjacent said blade tips and having a configuration corresponding to said tips.
Claim 11
Dependent Claim
34 words
A machine, as defined in claim 7, in which said inlet and outlet openings are in close angular proximity to one another and said block seal has side surfaces generally coinciding with meridional planes.
Claim 12
Dependent Claim
29 words
A machine, as defined in claim 7, in which said casing includes inlet and outlet passages and said block seal has a portion fairing smoothly into said outlet passage.
Claim 13
Dependent Claim
31 words
A machine, as defined in claim 7, in which the meridional cross-section of said annular fluid passage varies between said inlet and outlet openings to compensate for compressibility of the fluid.
Claim 14
Dependent Claim
116 words
In a machine for transferring energy between a fluid medium and a shaft rotatable about an axis, said machine including a casing and stator ring enclosed within said casing, said casing and ring defining an annular fluid passage extending about said axis, inlet and outlet passages in said casing in communication with said fluid passage, a rotor mounted on said shaft and carrying a blade cascade extending into said fluid passage in close proximity to said stator ring, each blade of said cascade having leading and trailing edges, one of which edges is closer to the axis than the other, the improvement in which the edge closer to said axis is longer than the other edge.
Claim 15
Dependent Claim
116 words
In a machine for transferring energy between a fluid medium and a shaft rotatable about an axis, said machine including a casing and stator ring enclosed within said casing, said casing and ring defining an annular fluid passage extending about said axis, inlet and outlet passages in said casing in communication with said fluid passage, a rotor mounted on said shaft and carrying a blade cascade extending into said fluid passage in close proximity to said stator ring, each blade of said cascade having leading and trailing edges, one of which edges is closer to the axis than the other, the improvement in which the edge closer to said axis is longer than the other edge.
Claim 16
Dependent Claim
47 words
A machine, as defined in claim 12, in which the centroid of the meridional cross-section of said annular passage lies at a radial distance from said axis that is between the radial distances from said axis to at least major portions of said leading and trailing edges.
Claim 17
Dependent Claim
19 words
A machine, as defined in claim 12, in which said edges extend generally parallel with said axis of rotation.
Claim 18
Dependent Claim
94 words
A machine for transferring energy between a fluid medium and a shaft rotatable about an axis, comprising: a casing having inlet and outlet openings and enclosing a stator ring and defining therewith a fluid passage extending circumferentially about said axis; and a rotor mounted on said shaft and having blades projecting into said fluid passage, said blades having leading and trailing edges generally parallel with said axis, one of said edges lying closer to said axis than the other of said edges, the edge closer to said axis being longer than said other edge.
Claim 19
Dependent Claim
94 words
A machine for transferring energy between a fluid medium and a shaft rotatable about an axis, comprising: a casing having inlet and outlet openings and enclosing a stator ring and defining therewith a fluid passage extending circumferentially about said axis; and a rotor mounted on said shaft and having blades projecting into said fluid passage, said blades having leading and trailing edges generally parallel with said axis, one of said edges lying closer to said axis than the other of said edges, the edge closer to said axis being longer than said other edge.
Claim 20
Dependent Claim
98 words
A machine for transferring energy between a fluid medium and a shaft rotatable about an axis, comprising: a casing having inlet and outlet openings and enclosing a stator ring and defining therewith a fluid passage extending circumferentially about said axis; and a rotor mounted on said shaft and having blades projecting into said fluid passage, said blades having leading and trailing edges generally parallel with said axis and in which the radial distance from said axis to the centroid of the meridional cross-section of the fluid passage lies between the radial distances to said leading and trailing edges.
Claim 21
Dependent Claim
98 words
A machine for transferring energy between a fluid medium and a shaft rotatable about an axis, comprising: a casing having inlet and outlet openings and enclosing a stator ring and defining therewith a fluid passage extending circumferentially about said axis; and a rotor mounted on said shaft and having blades projecting into said fluid passage, said blades having leading and trailing edges generally parallel with said axis and in which the radial distance from said axis to the centroid of the meridional cross-section of the fluid passage lies between the radial distances to said leading and trailing edges.
Claim 22
Dependent Claim
149 words
A machine for transferring energy between a fluid medium and a shaft rotatable about an axis, comprising: a casing enclosing a stator ring and defining therewith a fluid passage extending circumferentially about said axis, said casing including an inlet passage and an outlet passage, said passages communicating with said fluid passage through inlet and outlet openings; and a rotor mounted on said shaft and including a blade cascade projecting into said fluid passage and separated from said stator ring by a close running clearance, the blades of said cascade having leading edges and trailing edges, said inlet passage being oriented to direct the fluid generally radially to enter the blade cascade approximately perpendicular to the direction of movement of said cascade past said inlet opening, said outlet passage being oriented in approximate alignment with the direction of the absolute velocity vectors of the fluid exiting from said blade cascade.
Claim 23
Dependent Claim
149 words
A machine for transferring energy between a fluid medium and a shaft rotatable about an axis, comprising: a casing enclosing a stator ring and defining therewith a fluid passage extending circumferentially about said axis, said casing including an inlet passage and an outlet passage, said passages communicating with said fluid passage through inlet and outlet openings; and a rotor mounted on said shaft and including a blade cascade projecting into said fluid passage and separated from said stator ring by a close running clearance, the blades of said cascade having leading edges and trailing edges, said inlet passage being oriented to direct the fluid generally radially to enter the blade cascade approximately perpendicular to the direction of movement of said cascade past said inlet opening, said outlet passage being oriented in approximate alignment with the direction of the absolute velocity vectors of the fluid exiting from said blade cascade.
Claim 24
Dependent Claim
36 words
A machine, as defined in claim 17, in which said inlet and outlet openings are in close circumferential approximation and separated by a block seal having a notch conforming to the contour of said outlet passage.
Claim 25
Dependent Claim
20 words
A machine, as defined in claim 18, in which said block seal has side surfaces generally coinciding with meridional planes.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-12-31 | 1977-07-02 | 1978-01-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-12-31 | 1981-07-02 | 1982-01-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-12-31 | 1985-07-02 | 1986-01-01 | $7700.00 | Window Closed / Lapsed |