Patent US586227A successfully refreshed from Google Patents.
Patent US4378488A successfully refreshed from Google Patents.
US4378488A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Heater for an aquarium
Assignee: EBO-JAGER Inc A CORP OF CA
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Filing: 1981-05-22
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Granted: 1983-03-29
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Expires: 2001-05-22
Abstract
Abstract An immersible heater for an aquarium includes a waterproof, heat-resisting, flat plastic case which is tripartitioned in its interior, one chamber holding a flat coil carrier bonded or welded to the case; an upper chamber contains a leaf spring actuated by a bimetallic element; these chambers are separated by a thermally isolating chamber. The bias of the bimetallic actuator is adjusted by a sealed feedthrough screw. Current flow through the heating coil is indicated by a lamp covered with a thinner wall portion of the case. The front of the case carries heat-dissipating and -stiffening ribs; the rear of the case carries suction cups.
Inventors
- 👤 Wolfgang Jager
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 14:46
CPC Classifications
A; A01; A01K; A01K63/00; A01K63/06; A01K63/065; H; H05; H05B; H05B3/00; H05B3/78; H05B3/80
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
122 words
A heater for an aquarium, comprising: a flat waterproof case being made of a synthetic plastic which is water-resisting and heat-resisting, and there being integral partitions in the case for establishing at least one larger and one smaller chamber, a flat heating element including a flat carrier mounted to the case in the larger chamber and an electrical heating filament attached to said carrier; a temperature controller mounted in the smaller chamber; connecting wires sealingly run into the smaller chamber and connected to the controller, the controller being additionally connected electrically to the heating element, and integral flow deflection means on an outside surface of the case near the partition to improve thermal insulation of the temperature controller in the smaller chamber.
Claim 2
Dependent Claim
122 words
A heater for an aquarium, comprising: a flat waterproof case being made of a synthetic plastic which is water-resisting and heat-resisting, and there being integral partitions in the case for establishing at least one larger and one smaller chamber, a flat heating element including a flat carrier mounted to the case in the larger chamber and an electrical heating filament attached to said carrier; a temperature controller mounted in the smaller chamber; connecting wires sealingly run into the smaller chamber and connected to the controller, the controller being additionally connected electrically to the heating element, and integral flow deflection means on an outside surface of the case near the partition to improve thermal insulation of the temperature controller in the smaller chamber.
Claim 3
Dependent Claim
18 words
A heater as in claim 1, wherein the heating filament is a heating coil wound around the carrier.
Claim 4
Dependent Claim
15 words
A heater as in claim 1 wherein the case being comprised of two welded-together shells.
Claim 5
Dependent Claim
23 words
A heater as in claim 1, wherein the flow deflector means includes stiffening ribs on at least one flat side of said case.
Claim 6
Dependent Claim
18 words
A heater as in claim 1 wherein the carrier being physically secured to the inside of the case.
Claim 7
Dependent Claim
23 words
A heater as in claim 1, wherein the temperature controller includes a leaf spring switch and with a bimetallic actuator operating the switch.
Claim 8
Dependent Claim
21 words
A heater as in claim 6, and including an externally accessable adjusting screw for adjusting resilient bias of the bimetallic actuator.
Claim 9
Dependent Claim
22 words
A heater as in claim 1 and including an indicator lamp electrically connected to the temperature controller and disposed inside the case.
Claim 10
Dependent Claim
35 words
A heater as in claim 6, including mounting ridges inside said small chamber, the switch being mounted on one of the ridges, the bimetallic actuator being mounted on another, oppositely located one of the ridges.
Claim 11
Dependent Claim
33 words
A heater as in claim 1, including posts extending from one flat side, and suction cups seated on and held by said posts, the posts including retention means for holding the suction cups.
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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) | 1986-03-28 | 1986-09-27 | 1987-03-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-03-28 | 1990-09-27 | 1991-03-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-03-28 | 1994-09-27 | 1995-03-29 | $7700.00 | Window Closed / Lapsed |