USRE28540E
Expired / Lapsed
US
⏱️ 0.0 years remaining
Composite knockdown pump
Assignee: BW IP International Inc
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Filing: 1974-03-11
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Granted: 1975-09-02
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Expires: 1994-03-11
Abstract
Abstract A centrifugal fluid pump suitable for assembly into an operable unit within a confined space including a plurality of impellers each mounted within respective fluid discharge members and in respective association with a plurality of fluid suction inlet members; such impellers being mounted on a composite drive shaft having a plurality of members integrally assembled to provide a high degree of radial and axial alignment and a high torque transfer capability.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 11:55
CPC Classifications
F; F04; F04D; F04D29/00; F04D29/04; F04D29/043; F04D29/044; F04D1/00; F04D1/006; F04D1/06; F04D29/40; F04D29/42; F04D29/44; F04D29/445; F04D29/60; F04D29/62; F04D29/628; F04D29/66; F04D29/68; F04D29/688
Claims Analysis
Total Claims: 19
Claim 1
Independent Claim
173 words
A centrifugal pump comprising: a plurality of impellers mounted on a composite rotary drive shaft; each of said impellers being mounted within a respective circular fluid discharge housing and mounted in fluid communication with a circular fluid suction housing; said drive shaft having a knockdown connection means for supporting said shaft in radial and axial alignment; said connection means including two tubular shaft sections with each of said shaft sections being provided with teeth radially defined in an annular area about one end thereof; said teeth being provided to mesh together in forcible engagement and thereby support said shaft sections in alignment; a support mandrel mounted within said shaft sections and connected to one of said shaft sections; adjustable retaining means connected to said mandrel and to the other of said shaft sections for retaining said mandrel in tension and said teeth in forcible engagement; and (The pump of claim 1 wherein) sleeve bearing means adapted for lubrication by pumped fluids (is) mounted in said pump to support said shaft between said impellers.
Claim 2
Dependent Claim
193 words
A centrifugal pump comprising: a plurality of impellers mounted on a composite rotary drive shaft; each of said impellers being mounted within a respective circular fluid discharge housing and mounted in fluid communication with a circular fluid suction housing; said drive shaft having a knockdown connection means for supporting said shaft in radial and axial alignment; said connection means including two tubular shaft sections with each of said shaft sections being provided with teeth radially defined in an annular area about one end thereof; said teeth being provided to mesh together in forcible engagement and thereby support said shaft sectioNs in alignment; a support mandrel mounted within said shaft sections and connected to one of said shaft sections; adjustable retaining means connected to said mandrel and to the other of said shaft sections for retaining said mandrel in tension and said teeth in forcible engagement; and (The pump of claim 1 wherein) the teeth defined about said one of said shaft section (are) being concave in profile as viewed from the axis thereof and the teeth defined about said other of said shaft section (are) being convex as viewed along the axis thereof.
Claim 3
Dependent Claim
189 words
A centrifugal pump comprising: a plurality of impellers mounted on a composite rotary drive shaft; each of said impellers being mounted within a respective circular fluid discharge housing and mounted in fluid communication with a circular fluid suction housing; said drive shaft having a knockdown connection means for supporting said shaft in radial and axial alignment; said connection means including two tubular shaft sections with each of said shaft sections being provided with teeth radially defined in an annular area about one end thereof; said teeth being provided to mesh together in forcible engagement and thereby support said shaft sections in alignment; a support mandrel mounted within said shaft sections and connected to one of said shaft sections; adjustable retaining means connected to said mandrel and to the other of said shaft sections for retaining said mandrel in tension and said teeth in forcible engagement; tensioning means removably connected to said mandrel and to said other of said shaft sections for stressing said mandrel in tension and thereby drawing said teeth into forcible engagement; and (The pump of claim 6 wherein) said tensioning means (includes) comprising hydraulic actuating means.
Claim 4
Dependent Claim
206 words
A centrifugal pump comprising: a plurality of impellers mounted on a composite rotary drive shaft; each of said impellers being mounted within a respective circular fluid discharge housing and mounted in fluid communication with a circular fluid suction housing; said drive shaft having a knockdown connection means for supporting said shaft in radial and axial alignment; said connection means including two tubular shaft sections with each of said shaft sections being provided with teeth radially defined in an annular area about one end thereof; said teeth being provided to mesh together in forcible engagement and thereby support said shaft sections in alignment; a support mandrel mounted within said shaft sections and connected to one of said shaft sections; adjustable retaining means connected to said mandrel and to the other of said shaft sections for retaining said mandrel in tension and said teeth in forcible engagement; tensioning means removably connected to said mandrel and to said other of said shaft sections for stressing said mandrel in tension and thereby drawing said teeth into forcible engagement; and (The pump of claim 6 wherein) said tensioning means comprising (comprises) removable piston and cylinder means adapted to stress said mandrel means in response to injection of hydraulic fluid under pressure.
Claim 5
Dependent Claim
177 words
A centrifugal pump comprising: a plurality of impellers mounted on a composite rotary drive shaft; eacH of said impellers being mounted within a respective circular fluid discharge housing and mounted in fluid communication with a circular fluid suction housing; said drive shaft having a knockdown connection means for supporting said shaft in radial and axial alignment; said connection means including two tubular shaft sections with each of said shaft sections being provided with teeth radially defined in an annular area about one end thereof; said teeth being provided to mesh together in forcible engagement and thereby support said shaft sections in alignment; a support mandrel mounted within said shaft sections and connected to one of said shaft sections; and adjustable retaining means connected to said mandrel and to the other of said shaft sections for retaining said mandrel in tension and said teeth in forcible engagement; and (The pump of claim 1 wherein) each said suction housing (includes) comprising a radially disposed baffle therein for preventing swirling of pumped fluids about the axis of said drive shaft.
Claim 6
Dependent Claim
161 words
A centrifugal pump comprising: a plurality of impellers mounted on a composite rotary drive shaft; each of said impellers being mounted within a respective circular fluid discharge housing and mounted in fluid communication with a circular fluid suction housing; said drive shaft having a knockdown connection means for supporting said shaft in radial and axial alignment; said connection means including two tubular shaft sections with each of said shaft sections being provided with teeth radially defined in an annular area about one end thereof; said teeth being provided to mesh together in forcible engagement and thereby support said shaft section in alignment; a support mandrel mounted within said shaft sections and connected to one of said shaft sections; and adjustable retaining means connected to said mandrel and to the other of said shaft sections for retaining said mandrel in tension and said teeth in forcible engagement; and (The pump of claim 1 wherein) said teeth (are) provided being of curvate configuration.
Claim 7
Dependent Claim
176 words
A centrifugal pump comprising: a plurality of impellers mounted on a composite rotary drive shaft; each of said impellers being mounted within a respective circular fluid discharge housing and mounted in fluid communication with a circular fluid suction housing; said drive shaft having a knockdown connection means between each said impeller for supporting said shaft in radial and axial alignment; said connection means including two tubular shaft sections with each of said shaft sections being provided with teeth radially defined in an annular area about one end thereof; said teeth provided to mesh together in forcible engagement and thereby support saId shaft sections in alignment; a support mandrel mounted within said shaft sections and connected to one of said shaft sections; adjustable retaining means connected to said mandrel and to the other of said shaft sections for retaining said mandrel in tension and said teeth in forcible engagement; and (The pump of claim 11 wherein) sleeve bearing means adapted for lubrication by pumped fluids (is) mounted in said pump to support said shaft between said impellers.
Claim 8
Dependent Claim
22 words
The pump of claim 12 wherein a fluid section housing is axially mounted on each end of each said fluid discharge housing.
Claim 9
Dependent Claim
13 words
The pump of claim 13 wherein said teeth are provided of curvate configuration.
Claim 10
Dependent Claim
45 words
The pump of claim 13 wherein the teeth defined about said one of said shaft sections are concave in profile as viewed from the axis thereof and the teeth defined about said other of said shaft sections are convex as viewed along the axis thereof.
Claim 11
Dependent Claim
35 words
The pump of claim 14 including tensioning means removably connected to said mandrel and to said other of said shaft sections for stressing said mandrel in tension and thereby drawing said teeth into forcible engagement.
Claim 12
Dependent Claim
13 words
The pump of claim 16 wherein said tensioning means includes hydraulic actuating means.
Claim 13
Dependent Claim
30 words
The pump of claim 16 wherein said tensioning means comprises removable piston and cylinder means adapted to stress said mandrel means in response to injection of hydraulic fluid under pressure.
Claim 14
Dependent Claim
29 words
The pump of claim 13 wherein each said suction housing includes a radially disposed baffle therein for preventing swirling of pumped fluids about the axis of said drive shaft.
Claim 15
Dependent Claim
195 words
A centrifugal pump comprising: a plurality of impellers mounted on a composite rotary drive shaft; each of said impellers being mounted within a respective circular fluid discharge housing and mounted in fluid communication with a circular fluid suction housing; said drive shaft having a knockdown connection means for supporting said shaft in radial and axial alignment; said connection means including two tubular shaft sections with each of said shaft sections being provided with teeth radially disposed in an annular area about one end thereof; said teeth being provided to mesh together in forcible engagement and thereby support said shaft sections in alignment; a support mandrel mounted within said shaft sections and connected to one of said sections; and adjustable retaining means connected to said mandrel and to the other of said shaft sections for retaining said mandrel in tension and said teeth in forcible engagement; said support mandrel having a terminal sleeve connected to said one of said sections by a threaded connection said sleeve fitting closely within accommodating bores defined in said shaft sections at the juncture of said knockdown connection means and seal means between said sleeve and each of said shaft sections.
Claim 16
Dependent Claim
12 words
The pump of claim 22 characterized by said seal means comprising O-rings.
Claim 17
Dependent Claim
24 words
The pump of claim 22 characterized by at least one of said knockdown connection means being provided in said drive shaft between said impellers.
Claim 18
Dependent Claim
46 words
The pump of claim 22 characterized by the teeth defined about said one of said shaft sections being concave in profile as viewed from the axis thereof and the teeth defined about said other of said shaft sections being convex as viewed along the axis thereof.
Claim 19
Dependent Claim
22 words
The pump of any of the claims 22 characterized in that said knockdown connections means is provided between each two successive impellers.
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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) | 1978-09-01 | 1979-03-03 | 1979-09-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-09-01 | 1983-03-03 | 1983-09-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-09-01 | 1987-03-03 | 1987-09-02 | $7700.00 | Window Closed / Lapsed |