Patent US4246686A successfully refreshed from Google Patents.
Patent US3684400A successfully refreshed from Google Patents.
US3684400A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Submersible pump and control system
Assignee: Tait Manufacturing Co
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Filing: 1970-10-26
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Granted: 1972-08-15
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Expires: 1990-10-26
Abstract
Abstract A pump housing encloses an impeller driven by a motor which is operated by a control system including a reed switch in the gate circuit of a thyristor within the power supply lines to the motor. The reed switch is actuated by movement of a magnet mounted on a movable vertical rod having its upper end portion guided by a ferrous body which is effective to produce a flux path to the switch and to retain the magnet. The rod and magnet are moved by a float slidably mounted on the rod, and the assembly of the ferrous body, switch and thyristor are removable as a unit.
Inventors
- 👤 Amos M Einerson
- 👤 Frank N Schauer
- 👤 Thomas G Abele
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 16:56
CPC Classifications
F; F04; F04D; F04D15/00; F04D15/02; F04D15/0209; F04D15/0218; H; H02; H02K; H02K17/00; H02K17/02; H02K17/30; H02K5/00; H02K5/04; H02K5/12; H02K5/132
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
243 words
A submersible pump unit comprising a housing defining a pump chamber, means defining an inlet and an outlet for said chamber, a motor connected to said pump housing and having a rotor shaft, an impeller disposed within saId chamber and connected to said shaft, a ferrous body, means connected to said housing and supporting one portion of said body, a magnetically actuated reed switch mounted on said body, means including a thyristor connecting said switch to said motor for controlling said motor in response to operation of said switch, a thickness oriented magnet, a vertical rod supporting said magnet, means on said body and connected to said housing for supporting said rod and said magnet for vertical movement between a first lower position and a second upper position with said magnet adjacent said body to effect actuation of said switch, a float slidably mounted on said rod for vertical movement between upper and lower predetermined positions, means for moving said rod and said magnet from said first position to said second position in response to rising of said float to said upper portion, stop means mounted on said rod and effective to cause movement of said rod and said magnet from said second position to said first position in response to engagement by said float moving downward toward said lower position, and said magnet being magnetically retained by said body in said second position while said float is descending to said lower position.
Claim 2
Dependent Claim
243 words
A submersible pump unit comprising a housing defining a pump chamber, means defining an inlet and an outlet for said chamber, a motor connected to said pump housing and having a rotor shaft, an impeller disposed within saId chamber and connected to said shaft, a ferrous body, means connected to said housing and supporting one portion of said body, a magnetically actuated reed switch mounted on said body, means including a thyristor connecting said switch to said motor for controlling said motor in response to operation of said switch, a thickness oriented magnet, a vertical rod supporting said magnet, means on said body and connected to said housing for supporting said rod and said magnet for vertical movement between a first lower position and a second upper position with said magnet adjacent said body to effect actuation of said switch, a float slidably mounted on said rod for vertical movement between upper and lower predetermined positions, means for moving said rod and said magnet from said first position to said second position in response to rising of said float to said upper portion, stop means mounted on said rod and effective to cause movement of said rod and said magnet from said second position to said first position in response to engagement by said float moving downward toward said lower position, and said magnet being magnetically retained by said body in said second position while said float is descending to said lower position.
Claim 3
Dependent Claim
188 words
A submersible pump unit comprising a housing defining a pump chamber, means defining an inlet and an outlet for said chamber, a motor connected to said pump housing and having a rotor shaft, an impeller disposed within said chamber and connected to said shaft, a magnetically actuated switch, a gate circuit including said switch, a bi-directional thyristor actuatable by said gate circuit and connected to said motor for controlling said motor in response to operation of said switch, a magnet, means supporting said magnet for movement between first and second positions to effect actuation of said switch, a float, means supporting said float for movement independently of said magnet between upper and lower positions, means for moving said magnet from said first position to said second position in response to movement of said float to said upper position, means for moving said magnet from said second position to said first position in response to movement of said float to said lower position, and means for holding said magnet in at least one of said positions while said float is moving to one of said upper and lower positions.
Claim 4
Dependent Claim
188 words
A submersible pump unit comprising a housing defining a pump chamber, means defining an inlet and an outlet for said chamber, a motor connected to said pump housing and having a rotor shaft, an impeller disposed within said chamber and connected to said shaft, a magnetically actuated switch, a gate circuit including said switch, a bi-directional thyristor actuatable by said gate circuit and connected to said motor for controlling said motor in response to operation of said switch, a magnet, means supporting said magnet for movement between first and second positions to effect actuation of said switch, a float, means supporting said float for movement independently of said magnet between upper and lower positions, means for moving said magnet from said first position to said second position in response to movement of said float to said upper position, means for moving said magnet from said second position to said first position in response to movement of said float to said lower position, and means for holding said magnet in at least one of said positions while said float is moving to one of said upper and lower positions.
Claim 5
Dependent Claim
35 words
A submersible pump unit as defined in claim 2 including a body supporting said thyristor and said switch, and means releasably supporting said body for removal of said thyristor and said switch as a unit.
Claim 6
Dependent Claim
208 words
A submersible pump unit comprising a housing defining a pump chamber, means defining an inlet and an outlet for said chamber, a motor connected to said pump housing and having a rotor shaft, an impeller disposed within said chamber and connected to said shaft, a magnetically actuated switch connected in controlling relation with said motor, a magnet, means supporting said magnet for movement between actuating and non-actuating positions with respect to said switch, a float, means supporting said float for movement independently of said magnet between upper and lower positions, means for moving said magnet from said non-actuating position to said actuating position in response to movement of said float from one of its said positions to the other, means for moving said magnet from said actuating position to said non-actuating position in response to substantially completed return movement of said float to said one position thereof, means for holding said magnet in said actuating position while said float is moving to said one position thereof, said holding means including a body of magnetic material engageable in magnetic flux conducting relation by said magnet in said actuating position thereof, and means mounting said switch in the path of said conducted flux for actuation thereby to control said motor.
Claim 7
Dependent Claim
208 words
A submersible pump unit comprising a housing defining a pump chamber, means defining an inlet and an outlet for said chamber, a motor connected to said pump housing and having a rotor shaft, an impeller disposed within said chamber and connected to said shaft, a magnetically actuated switch connected in controlling relation with said motor, a magnet, means supporting said magnet for movement between actuating and non-actuating positions with respect to said switch, a float, means supporting said float for movement independently of said magnet between upper and lower positions, means for moving said magnet from said non-actuating position to said actuating position in response to movement of said float from one of its said positions to the other, means for moving said magnet from said actuating position to said non-actuating position in response to substantially completed return movement of said float to said one position thereof, means for holding said magnet in said actuating position while said float is moving to said one position thereof, said holding means including a body of magnetic material engageable in magnetic flux conducting relation by said magnet in said actuating position thereof, and means mounting said switch in the path of said conducted flux for actuation thereby to control said motor.
Claim 8
Dependent Claim
40 words
A submersible pump unit as defined in claim 4 wherein said body is of a generally U-shaped configuration, said mAgnet is engageable against one end of said body, and said switch is mounted adjacent the other end of said body.
Claim 9
Dependent Claim
21 words
The submersible pump of claim 4 wherein said actuating position of said magnet corresponds to said upper position of said float.
Claim 10
Dependent Claim
38 words
A submersible pump unit as defined in claim 4 wherein said means supporting said float comprises a generally vertical guide member supported for generally vertical movement between predetermined limits, and said magnet being mounted on said guide member.
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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) | 1975-08-15 | 1976-02-14 | 1976-08-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-08-15 | 1980-02-14 | 1980-08-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-08-15 | 1984-02-14 | 1984-08-15 | $7700.00 | Window Closed / Lapsed |