US3865729A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pump for liquids, especially circulating pump for aquariums
Assignee: Individual
•
Filing: 1973-07-25
•
Granted: 1975-02-11
•
Expires: 1993-07-25
Abstract
Abstract A pump, especially for circulating liquid in an aquarium, in which a pipe is disposed in a substantially vertical plane with the lower end of the pipe being provided with an inlet and with the upper end of the pump being bent off horizontally and provided with an outlet. A spring resilient about a vertical axis is connected to the lower end of the pipe and electromagnetic means is provided for causing the pipe to oscillate about a vertical axis near the inlet in the lower end of the pipe, thereby to cause liquid to be expelled from the outlet of the pipe.
Inventors
- 👤 Ulrich Baensch
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 02:20
CPC Classifications
F; F04; F04B; F04B17/00; F04B17/03; F04B17/04; F04B17/042; A; A01; A01K; A01K63/00; A01K63/04; A01K63/047; F04D; F04D33/00; F04F; F04F7/00
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
144 words
IN A PUMP, ESPECIALLY FOR LIQUIDS, A CONTAINER HAVING A BOTTOM WALL AND SIDE WALLS AND OPEN AT THE TOP, A PIPE DISPOSED IN A GENERALLY VERTICAL PLANE AND HAVING AN INLET END AT THE BOTTOM EXTENDING INTO THE CONTAINER FROM ABOVE AND A LATERALLY OFFSET OUTLET END AT THE TOP WHICH IS DIRECTED OUTWARDLY OVER THE UPPER EDGE OF THE CONTAINER, SAID CONTAINER BEING ADAPTED TO RECEIVE LIQUID IN AN AMOUNT SUFFICIENT TO IMMERSE AT LEAST THE LOWER END OF SAID PIPE, A SPRING IN THE CONTAINER CONNECTED TO THE PIPE AND RESILIENTLY SUPPORTING THE PIPE FOR OSCILLATORY MOVEMENT IN A SUBSTANTIALLY HORIZONTAL DIRECTION IN THE CONTAINER, MAGNETIC ARMATURE MEANS CONNECTED TO THE PIPE, AND AN ELECTROMAGNET IN ABOUT THE SAME HORIZONTAL PLANE AS SAID ARMATURE AND ENGAGEABLE BY A PULSATING ELECTRIC CURRENT TO CAUSE SAID ARMATURE AND PIPE TO OSCILLATE AND THEREBY
Claim 2
Dependent Claim
144 words
IN A PUMP, ESPECIALLY FOR LIQUIDS, A CONTAINER HAVING A BOTTOM WALL AND SIDE WALLS AND OPEN AT THE TOP, A PIPE DISPOSED IN A GENERALLY VERTICAL PLANE AND HAVING AN INLET END AT THE BOTTOM EXTENDING INTO THE CONTAINER FROM ABOVE AND A LATERALLY OFFSET OUTLET END AT THE TOP WHICH IS DIRECTED OUTWARDLY OVER THE UPPER EDGE OF THE CONTAINER, SAID CONTAINER BEING ADAPTED TO RECEIVE LIQUID IN AN AMOUNT SUFFICIENT TO IMMERSE AT LEAST THE LOWER END OF SAID PIPE, A SPRING IN THE CONTAINER CONNECTED TO THE PIPE AND RESILIENTLY SUPPORTING THE PIPE FOR OSCILLATORY MOVEMENT IN A SUBSTANTIALLY HORIZONTAL DIRECTION IN THE CONTAINER, MAGNETIC ARMATURE MEANS CONNECTED TO THE PIPE, AND AN ELECTROMAGNET IN ABOUT THE SAME HORIZONTAL PLANE AS SAID ARMATURE AND ENGAGEABLE BY A PULSATING ELECTRIC CURRENT TO CAUSE SAID ARMATURE AND PIPE TO OSCILLATE AND THEREBY
Claim 3
Dependent Claim
80 words
A pump according to claim 1 in which said spring is a vertically extending torsionally resilient spring and has the upper end connected to said pipe near the lower end of the pipe and extends downwardly from the pipe to near the bottom wall of the container, means in the container fixedly supporting the lower end of the spring, the torsional resilience of the spring permitting oscillation of said pipe about a vertical axis near the axis of said spring.
Claim 4
Dependent Claim
22 words
A pump according to claim 1 in which said pipe is sufficiently rigid to be substantially nondeformable during operation of said pump.
Claim 5
Dependent Claim
37 words
A pump according to claim 1 in which said pipe is bent with the pipe being substantially vertical in the region of the lower inlet end and substantially horizontal in the region of the upper outlet end.
Claim 6
Dependent Claim
23 words
A pump according to claim 1 in which said spring is a substantially vertical leaf-like spring which is both laterally and torsionally resilient.
Claim 7
Dependent Claim
82 words
A pump according to claim 1 in which said spring is a substantially vertical leaf-like spring which is both laterally and torsionally resilient, said pipe bending off toward one side at the upper outlet end, the said pipe near the lower inlet end being connected to the upper end of said spring on the side of the spring nearest the outlet end of said pipe, said pipe being bodily pivotable laterally about a vertical axis near the said side of said spring.
Claim 8
Dependent Claim
21 words
A pump according to claim 1 in which said spring is in the form of a strip of hard synthetic material.
Claim 9
Dependent Claim
63 words
A pump according to claim 1 in which the spring extends downwardly from the pipe and has the upper end in engagement with the side of the pipe near the lower end of the pipe, and a body of material encapsulating the upper end of the spring and the lower end of the pipe while leaving the inlet end of the pipe exposed.
Claim 10
Dependent Claim
19 words
A pump according to claim 8 in which said armature means is also encapsulated in said body of material.
Claim 11
Dependent Claim
58 words
A pump according to claim 1 in which the spring extends downwardly from the pipe and has the upper end in engagement with the side of the pipe near the lower end of the pipe, said armature means being connected to at least one of said pipe and spring near the connection of the spring to the pipe.
Claim 12
Dependent Claim
30 words
A pump according to claim 2 in which said armature means comprises a pair of permanent magnets disposed on opposite sides of the common plane of said pipe and spring.
Claim 13
Dependent Claim
16 words
A pump according to claim 1 in which said electromagnet is adjustable relative to said armature.
Claim 14
Dependent Claim
72 words
A pump according to claim 2 in which said armature means comprises a pair of permanent magnets disposed on opposite sides of the common plane of said pipe and spring, the magnetic axis of said electromagnet extending substantially horizontally in the region of said plane and at about the level of said magnets, and means supporting said electromagnet for rotation about an axis parallel to said magnetic axis and disposed vertically therebeneath.
Claim 15
Dependent Claim
22 words
A pump according to claim 1 in which said container includes an inlet near the bottom for the supply of liquid thereto.
Claim 16
Dependent Claim
18 words
A pump according to claim 14 which includes a filter element in series with the said container inlet.
Claim 17
Dependent Claim
36 words
A pump according to claim 1 in which said container is adapted for being supported inside a wall of an aquarium while said electromagnet is adapted for being supported outside the said wall of the aquarium.
Claim 18
Dependent Claim
103 words
A pump according to claim 1 in which the lower end of said pipe is substantially vertical while the pipe is bent off so the upper end is substantially horizontal, said pipe being disposed in about the same vertical plane as the axis of said electromagnet, said spring being in the form of a strip having the longer cross sectional axis in said plane and connected on the edge facing away from the electromagnet to the lower end of said pipe, said armature means comprising permanent magnets mounted on opposite sides of said strip near the level of said axis of said electromagnet.
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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) | 1978-02-10 | 1978-08-12 | 1979-02-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-02-10 | 1982-08-12 | 1983-02-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-02-10 | 1986-08-12 | 1987-02-11 | $7700.00 | Window Closed / Lapsed |