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US3892945A Expired / Lapsed US ⏱️ 0.0 years remaining

Electric bottle warmer

Assignee: Individual
•
Filing: 1973-07-26
•
Granted: 1975-07-01
•
Expires: 1993-07-26
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Abstract

Abstract An electric bottle warmer for warming small containers, bottles, jars and the like is provided with a pot-like body adapted to be supported on a surface and defining a container receiving interior space having perforated bottom. A cup-shaped vessel adapted to receive a quantity of water is recieved below the perforated bottom. A heating element, which may comprise a pair of spaced electrodes or a resistance heating element of the ''''Calrod'''' type, is located within the vessel for heating the water to produce steam which passes through the perforations into the interior space of the body. A normally open water level sensing switch is mounted on the side wall of the vessel and arranged in circuit with the heating element so that the heating element can be energized only in the presence of a predetermined water level in the vessel. A normally open pressure switch in circuit with the heating element and having an actuating plunger adapted to contact the surface on which body is supported is arranged such that the heating element can only be energized when the body is supported in contact with the surface and a container to be heated is received within the interior space.

Inventors

  • 👤 Robert Lerner

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-10-29 07:54
CPC Classifications
A; A47; A47J; A47J36/00; A47J36/24; A47J36/2411; A47J36/2433

Claims Analysis

Total Claims: 3
Claim 1
Independent Claim 241 words
A heating device for bottles and the like, comprising an enclosing body adapted to be supported on a surface and defining an interior space for receiving said bottle, said body having a perforated bottom wall, a cup-shaped vessel, having unitarily formed bottom and side walls, for receiving a given quantity of liquid, removably mounted to depend below said perforated bottom and an electric heating element located within said vessel for heating said liquid to produce steam to pass through said perforations into contact with said container, a liquid sensing switch mounted on a side wall of said vessel above the bottom wall, said liquid sensing switch having a normally open position and an operable closed position in series with said electric heating element, said switch being responsive to the presence of liquid in said vessel to be rendered in closed position, a pressure switch having open and closed positions in series with said heating element to control said heating element, said switch being mounted to depend below said vessel and having a switch actuating plunger member extending outwardly of said body into contact with the surface on which it is supported, spring means resiliently biasing said plunger in switch open position, said spring means being sufficient to maintain said plunger in open position on receipt of said quantity of liquid in said vessel and while being free of a bottle, but being overcome on introduction of a bottle into said body.
Claim 2
Dependent Claim 241 words
A heating device for bottles and the like, comprising an enclosing body adapted to be supported on a surface and defining an interior space for receiving said bottle, said body having a perforated bottom wall, a cup-shaped vessel, having unitarily formed bottom and side walls, for receiving a given quantity of liquid, removably mounted to depend below said perforated bottom and an electric heating element located within said vessel for heating said liquid to produce steam to pass through said perforations into contact with said container, a liquid sensing switch mounted on a side wall of said vessel above the bottom wall, said liquid sensing switch having a normally open position and an operable closed position in series with said electric heating element, said switch being responsive to the presence of liquid in said vessel to be rendered in closed position, a pressure switch having open and closed positions in series with said heating element to control said heating element, said switch being mounted to depend below said vessel and having a switch actuating plunger member extending outwardly of said body into contact with the surface on which it is supported, spring means resiliently biasing said plunger in switch open position, said spring means being sufficient to maintain said plunger in open position on receipt of said quantity of liquid in said vessel and while being free of a bottle, but being overcome on introduction of a bottle into said body.
Claim 3
Dependent Claim 42 words
The device according to claim 1 wherein said body comprises an outer shell and an inner shell spaced therefrom, said perforated bottom wall being formed on said inner shell, said liquid vessel being mounted in liquid tight engagement to said inner shell.

References Cited (Backward Citations)

US1451636A Cited
US2020364A Cited
US2158698A Cited
US2536596A Cited
US2505092A Cited
US2526447A Cited
US3347618A Cited
US3654428A Cited

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1978-06-30 1978-12-30 1979-07-01 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1982-06-30 1982-12-30 1983-07-01 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1986-06-30 1986-12-30 1987-07-01 $7700.00 Window Closed / Lapsed

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