US5228839A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Multistage ejector pump
Assignee: Gast Manufacturing Inc
•
Filing: 1991-05-24
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Granted: 1993-07-20
•
Expires: 2011-05-24
Abstract
Abstract An ejector pump having a plurality of longitudinally aligned chambers, each chamber including a pair of opposed end walls, at least two of the end walls having a nozzle and a one-way valve, with a connection to compressed gas to the most upstream of the nozzles, the pump having a single cylindrical pump body defining a cylinder or axially aligned cylinders with multiple end walls inserted therein, each wall having substantially the shape of a cross section through the cylinder or the respective cylinders. The end walls being secured to the cylinder at a point along the length of the cylinder or each end wall attached to the corresponding aligned cylinder.
Inventors
- 👤 Lester K. Peterson
- 👤 Donald E. Lentz
- 👤 Donald A. Bomke
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 17:40
CPC Classifications
F; F04; F04F; F04F5/00; F04F5/14; F04F5/16; F04F5/20; F04F5/22
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
129 words
In an ejector pump comprising a plurality of longitudinally aligned chambers, each including a pair of opposed end walls, at least two of said walls including a nozzle and a one-way valve, and means for supplying compressed gas to the most upstream of the nozzles, the improvement wherein the pump comprises a single cylindrical pump body defining a cylinder will multiple said walls inserted therein, each wall having substantially the shape of a cross section through the cylinder at a point along the length of the cylinder to which said wall is inserted, and cylindrical spacer sleeves, each having an outer cross section substantially identical to the cross-section of the cylinder to be received therein for securing each wall at its respective point along the length of the cylinder.
Claim 2
Dependent Claim
129 words
In an ejector pump comprising a plurality of longitudinally aligned chambers, each including a pair of opposed end walls, at least two of said walls including a nozzle and a one-way valve, and means for supplying compressed gas to the most upstream of the nozzles, the improvement wherein the pump comprises a single cylindrical pump body defining a cylinder will multiple said walls inserted therein, each wall having substantially the shape of a cross section through the cylinder at a point along the length of the cylinder to which said wall is inserted, and cylindrical spacer sleeves, each having an outer cross section substantially identical to the cross-section of the cylinder to be received therein for securing each wall at its respective point along the length of the cylinder.
Claim 3
Independent Claim
16 words
The apparatus of claim wherein the cylinder is a circular cylinder and the walls are circular.
Claim 4
Dependent Claim
17 words
The apparatus of claim 2 wherein the nozzles are oriented in the centers of their respective walls.
Claim 5
Dependent Claim
49 words
The apparatus of claim 1, 2 or 3 wherein the one-way valves comprise disks of elastomeric material, each provided with an aperture for accommodating the nozzle provided in its respective wall, each one-way valve further comprising one or more valve openings covered by a respective one of the disks.
Claim 6
Dependent Claim
28 words
The apparatus of claim 1, 2 or 3 wherein each wall includes a perimeter and further comprising an O-ring seal for positioning around the perimeter of each wall.
Claim 7
Dependent Claim
151 words
In an ejector pump comprising a plurality of longitudinally aligned chambers, each including a pair of opposed end walls, at least two of said walls including a nozzle and a one-way valve, and means for supplying compressed gas to the most upstream of the nozzles, the improvement wherein the pump comprises a single cylindrical pump body with multiple said walls inserted therein defining a plurality of axially aligned cylinders each of which lies in open communication with an adjacent one of said cylinders, with the cross-sections of the cylinders being similar and the cross-section of each such cylinder being greater than the cross-section of the next adjacent downstream cylinder, each wall having substantially the shape of a cross-section through one of said cylinders, and means defining grooves in the cylinders adjacent each respective point and snap rings for positioning in the grooves for securing each wall in one of said cylinders.
Claim 8
Dependent Claim
151 words
In an ejector pump comprising a plurality of longitudinally aligned chambers, each including a pair of opposed end walls, at least two of said walls including a nozzle and a one-way valve, and means for supplying compressed gas to the most upstream of the nozzles, the improvement wherein the pump comprises a single cylindrical pump body with multiple said walls inserted therein defining a plurality of axially aligned cylinders each of which lies in open communication with an adjacent one of said cylinders, with the cross-sections of the cylinders being similar and the cross-section of each such cylinder being greater than the cross-section of the next adjacent downstream cylinder, each wall having substantially the shape of a cross-section through one of said cylinders, and means defining grooves in the cylinders adjacent each respective point and snap rings for positioning in the grooves for securing each wall in one of said cylinders.
Claim 9
Dependent Claim
16 words
The apparatus of claim 6 wherein the cylinders are circular cylinders and the walls are circular.
Claim 10
Dependent Claim
17 words
The apparatus of claim 7 wherein the nozzles are oriented in the centers of their respective walls.
Claim 11
Dependent Claim
28 words
The apparatus of claim 6, 7 or 8 wherein each wall includes a perimeter and further comprising an O-ring seal for positioning around the perimeter of each wall.
Claim 12
Dependent Claim
49 words
The apparatus of claim 6, 7 or 8 wherein the one-way valves comprise disks of elastomeric material, each provided with an aperture for accommodating the nozzle provided in its respective wall, each one-way valve further comprising one or more valve openings covered by a respective one of the disks.
Claim 13
Dependent Claim
151 words
In an ejector pump comprising a plurality of longitudinally aligned chambers, each including a pair of opposed end walls, at least two of said walls including a nozzle and a one-way valve, and means for supplying compressed gas to the most upstream of the nozzles, the improvement wherein the pump comprises a single cylindrical pump body with multiple said walls inserted therein defining a plurality of axially aligned cylinders each of which lies in open communication with an adjacent one of said cylinders, with the cross-sections of the cylinders being similar and the cross-section of each such cylinder being less than the cross-section of the next adjacent downstream cylinder, each wall having substantially the shape of a cross-section through one of said cylinders, and means defining grooves in the cylinders adjacent each respective point and snap rings for positioning in the grooves for securing each wall in one of said cylinders.
Claim 14
Dependent Claim
151 words
In an ejector pump comprising a plurality of longitudinally aligned chambers, each including a pair of opposed end walls, at least two of said walls including a nozzle and a one-way valve, and means for supplying compressed gas to the most upstream of the nozzles, the improvement wherein the pump comprises a single cylindrical pump body with multiple said walls inserted therein defining a plurality of axially aligned cylinders each of which lies in open communication with an adjacent one of said cylinders, with the cross-sections of the cylinders being similar and the cross-section of each such cylinder being less than the cross-section of the next adjacent downstream cylinder, each wall having substantially the shape of a cross-section through one of said cylinders, and means defining grooves in the cylinders adjacent each respective point and snap rings for positioning in the grooves for securing each wall in one of said cylinders.
Claim 15
Dependent Claim
16 words
The apparatus of claim 1 wherein the cylinders are circular cylinders and the walls are circular.
Claim 16
Dependent Claim
17 words
The apparatus of claim 12 wherein the nozzles are oriented in the centers of their respective walls.
Claim 17
Dependent Claim
28 words
The apparatus of claim 11, 12, or 13 wherein each wall includes a perimeter and further comprising an O-ring seal for positioning around the perimeter of each wall.
Claim 18
Dependent Claim
49 words
The apparatus of claim 11, 12 or 13 wherein the one-way valves comprise disks of elastomeric material, each provided with an aperture for accommodating the nozzle provided in its respective wall, each one-way valve further comprising one or more valve openings covered by a respective one of the disks.
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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) | 1996-07-19 | 1997-01-18 | 1997-07-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2000-07-19 | 2001-01-18 | 2001-07-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2004-07-19 | 2005-01-18 | 2005-07-20 | $7700.00 | Window Closed / Lapsed |