US3766358A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Immersion heater
Assignee: Individual
•
Filing: 1972-04-27
•
Granted: 1973-10-16
•
Expires: 1992-04-27
Abstract
Abstract An immersion heater including a heating element immersible in a fluid for heating the latter, and a mixing device for agitating the fluid mounted on the heating element. The mixing device is reciprocable in response to energization of an electromagnetic drive, and may be connected into the electrical circuit for the heating element so as to be operable in conjunction with the operation of the heating element or responsive to temperature levels sensed in the heating element.
Inventors
- 👤 Erb K Gass
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 23:20
CPC Classifications
H; H05; H05B; H05B3/00; H05B3/78; H05B3/80; G; G05; G05D; G05D23/00; G05D23/19; G05D23/1906; G05D23/1909; G05D23/1927; G05D23/1928; G05D23/20; G05D23/24
Claims Analysis
Total Claims: 26
Claim 1
Independent Claim
63 words
Immersion heater including an automatic temperature control; comprising a heating element adapted to be immersed in a fluid for heating thereof, and a fluid mixing device operatively connected to said heating element for imparting agitating motion to said heated fluid, said fluid mixing device comprising a circular plate member, said plate member being axially reciprocable in directions extending normal to the surface thereof.
Claim 2
Dependent Claim
63 words
Immersion heater including an automatic temperature control; comprising a heating element adapted to be immersed in a fluid for heating thereof, and a fluid mixing device operatively connected to said heating element for imparting agitating motion to said heated fluid, said fluid mixing device comprising a circular plate member, said plate member being axially reciprocable in directions extending normal to the surface thereof.
Claim 3
Dependent Claim
76 words
Immersion heater as claimed in claim 1, comprising a source of electrical control current connected to said heating element, including temperature sensing means, the electrical control current flow to said element being responsive to said temperature sensing means, safety switch circuit means positioned in the electrical control current circuit of said heating element, said electrical control current circuit and said safety switch comprising a contactless switch including at least one thyristor, said thyristor having a trigger.
Claim 4
Dependent Claim
49 words
Immersion heater as claimed in claim 2, the electrical current supply to said heating element being controlled by the relatioNship between a variable current value responsive to said temperature sensing means and a predetermined operating current value, and at least one regulating resistance for determining said operating current value.
Claim 5
Dependent Claim
27 words
Immersion heater as claimed in claim 1, wherein said plate member comprises at least one nozzle aperture extending in the direction of movement of said plate member.
Claim 6
Dependent Claim
23 words
Immersion heater as claimed in claim 4, wherein said nozzle aperture comprises a tapered bore diameter extending along the length of said aperture.
Claim 7
Dependent Claim
17 words
Immersion heater as claimed in claim 4, wherein said nozzle aperture comprises an intermediate reduced-diameter orifice portion.
Claim 8
Dependent Claim
41 words
Immersion heater as claimed in claim 1, said fluid mixing device comprising an electrical induction coil, said induction coil including a movable iron core fastened to said plate member for imparting axial movement thereto in response to energization of said coil.
Claim 9
Dependent Claim
31 words
Immersion heater as claimed in claim 7, comprising a stationary iron core in proximate relationship with said movable iron core, said induction coil being rigidly fastened to said stationary iron core.
Claim 10
Dependent Claim
28 words
Immersion heater as claimed in claim 8, said stationary iron core having a recessed portion, said movable iron core having portions thereof extending into said recessed core portion.
Claim 11
Dependent Claim
18 words
Immersion heater as claimed in claim 1, comprising means for imparting reverse axial movement to said plate member.
Claim 12
Dependent Claim
16 words
Immersion heater as claimed in claim 10, wherein said reverse movement imparting means comprises a membrane.
Claim 13
Dependent Claim
15 words
Immersion heater as claimed in claim 11, said membrane being formed of corrugated sheet metal.
Claim 14
Dependent Claim
62 words
Immersion heater as claimed in claim 9, comprising a membrane means connected to said plate member for imparting reverse axial movement thereto, receptacle means encompassing said induction coil and said movable and stationary iron cores, said membrane means comprising a cover fastened to said receptacle so as to form jointly therewith a sealed housing for said induction coil and said iron cores.
Claim 15
Dependent Claim
27 words
Immersion heater as claimed in claim 7, comprising a plurality of said plate members adapted to be axially moved in response to energization of said induction coil.
Claim 16
Dependent Claim
32 words
Immersion heater as claimed in claim 1, said heating element having an upper and a lower surface, said fluid mixing device being rigidly fastened to the upper surface of said heating element.
Claim 17
Dependent Claim
40 words
Immersion heater as claimed in claim 3, comprising a first one of said regulating resistance in the electrical control current circuit, and a second regulating resistance in said safety switch circuit means, said first and second resistances forming a tandem-potentiometer.
Claim 18
Dependent Claim
18 words
Immersion heater as claimed in claim 2, said thyristor trigger including a glow tube forming a control lamp.
Claim 19
Dependent Claim
14 words
Immersion heater as claimed in claim 2, said thyristor trigger comprising a contact thermometer.
Claim 20
Dependent Claim
13 words
Immersion heater as claimed in claim 2, said thyristor trigger comprising a transistor.
Claim 21
Dependent Claim
16 words
Immersion heater as claimed in claim 19, said transistor comprising a transistor having a single pn-transition.
Claim 22
Dependent Claim
29 words
Immersion heater as claimed in claim 2, comprising a condensator-type RC-element, and a resistance in said safety switch circuit means providing for instantaneous actuation of the trigger and thyristor.
Claim 23
Dependent Claim
27 words
Immersion heater as claimed in claim 2, comprising at least one resistance for reducing the circuit current intensity required for the safety switch circuit means actuating current.
Claim 24
Dependent Claim
33 words
Immersion heater as claimed in claim 2, comprising current stabilizers, current reference tubes, Zener reference diodes, and Zener diodes for reducing the operating circuit current intensities, and providing for elimination of current fluctuations.
Claim 25
Dependent Claim
47 words
Immersion heater as claimed in claim 2, comprising a low-temperature melting member, said member receiving electrical current flowing across a resistance of said safety switch, said member aDapted to be melted upon heating during current flow so as to interrupt flow of current to said heating element.
Claim 26
Dependent Claim
32 words
Immersion heater as claimed in claim 2, comprising instantaneously-operative safety means in the current supply circuit of said heating element, said safety means shutting-off said heater by short-circuiting of said heating element.
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) | 1976-10-15 | 1977-04-16 | 1977-10-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-10-15 | 1981-04-16 | 1981-10-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-10-15 | 1985-04-16 | 1985-10-16 | $7700.00 | Window Closed / Lapsed |