Patent US4419568A successfully refreshed from Google Patents.
US4419568A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Wet dressings heater
Assignee: Kendall Co
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Filing: 1982-07-12
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Granted: 1983-12-06
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Expires: 2002-07-12
Abstract
Abstract A heater for wet dressings comprising, a case having a base with sidewalls defining a cavity, and an insert connected to the base and defining at least one recess in the cavity to receive the wet dressings. The heater has an electrical heating element in close proximity to the insert recess for heating the wet dressings, and the temperature of the heating element is controlled in the desired range of temperature of the wet dressings.
Inventors
- 👤 Ronald R. Van Overloop
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 16:33
CPC Classifications
A; A61; A61F; A61F7/00; A61F7/02; A61F7/0241
Claims Analysis
Total Claims: 24
Claim 1
Independent Claim
348 words
A heater for wet dressing comprising: a case having a base with sidewalls defining a cavity; an insert within the cavity of said base and defining at least one narrow recess in said insert to receive wet dressings, said recess being capable of being heated; an electrical heating element, electrically insulated with respect to said recess and located in close proximity to the insert recess within that portion of said cavity between the insert and the base, for heating the wet dressings; electrical circuit means within said cavity interconnecting said heating element and a source of electric current; and means for controlling the temperature of the heating element in the desired range of temperature of the wet dressings, said controlling means being a part of said electrical circuit means and comprising; first means for controlling current to the heating element and for sensing the temperature associated with the heating element, said first means initially supplying current to the heating element until a first temperature is sensed substantially higher than the desired temperature range of the wet dressings, said first means interrupting current to the heating element at said first sensed temperature, said first means again supplying current to the heating element at a second sensed temperature substantially below the range of desired temperature of the wet dressings, and said first means subsequently interrupting current to the heating element when said first temperature is sensed; and second means for controlling current to the heating element and for sensing the temperature associated with the heating element, said second means initially supplying current to the heating element until a third temperature is sensed higher than the desired temperature range of the wet dressings and lower than said first temperature, said second means interrupting current to the heating element at said third sensed temperature, said second means again supplying current to the heating element at a fourth sensed temperature below the range of desired temperature of the wet dressings and higher than said second temperature, and said second means subsequently interrupting current to the heating element when said third temperature is sensed.
Claim 2
Dependent Claim
348 words
A heater for wet dressing comprising: a case having a base with sidewalls defining a cavity; an insert within the cavity of said base and defining at least one narrow recess in said insert to receive wet dressings, said recess being capable of being heated; an electrical heating element, electrically insulated with respect to said recess and located in close proximity to the insert recess within that portion of said cavity between the insert and the base, for heating the wet dressings; electrical circuit means within said cavity interconnecting said heating element and a source of electric current; and means for controlling the temperature of the heating element in the desired range of temperature of the wet dressings, said controlling means being a part of said electrical circuit means and comprising; first means for controlling current to the heating element and for sensing the temperature associated with the heating element, said first means initially supplying current to the heating element until a first temperature is sensed substantially higher than the desired temperature range of the wet dressings, said first means interrupting current to the heating element at said first sensed temperature, said first means again supplying current to the heating element at a second sensed temperature substantially below the range of desired temperature of the wet dressings, and said first means subsequently interrupting current to the heating element when said first temperature is sensed; and second means for controlling current to the heating element and for sensing the temperature associated with the heating element, said second means initially supplying current to the heating element until a third temperature is sensed higher than the desired temperature range of the wet dressings and lower than said first temperature, said second means interrupting current to the heating element at said third sensed temperature, said second means again supplying current to the heating element at a fourth sensed temperature below the range of desired temperature of the wet dressings and higher than said second temperature, and said second means subsequently interrupting current to the heating element when said third temperature is sensed.
Claim 3
Dependent Claim
25 words
The heater of claim 1 in which the controlling means maintains the wet dressings in a temperature range of approximately 115° F. to 120° F.
Claim 4
Dependent Claim
15 words
The heater of claim 1 wherein said case has a lid removably covering said recess.
Claim 5
Dependent Claim
15 words
The heater of claim 3 including means for releasably attaching the lid to said base.
Claim 6
Dependent Claim
11 words
The heater of claim 1 wherein said sidewalls include insulation means.
Claim 7
Dependent Claim
28 words
The heater of claim 1 wherein said insert includes a plurality of recesses to receive wet dressings, and including a plurality of heating elements associated with said recesses.
Claim 8
Dependent Claim
36 words
The heater of claim 1 wherein the insert includes a pair of opposed walls defining said recess, and in which the heating element is secured to and substantially covers surfaces of said walls opposite said recess.
Claim 9
Dependent Claim
18 words
The heater of claim 1 wherein said heating element comprises an electrical heater imbedded in an elastic material.
Claim 10
Dependent Claim
14 words
The heater of claim 1 wherein the controlling means comprises at least one thermostat.
Claim 11
Dependent Claim
16 words
The heater of claim 1 wherein said first and second means comprise first and second thermostats.
Claim 12
Dependent Claim
20 words
The heater of claim 10 wherein the set points of said first thermostat are approximately 100° F. and 145° F.
Claim 13
Dependent Claim
20 words
The heater of claim 10 wherein the set points of said second thermostat are approximately 115° F. and 135° F.
Claim 14
Dependent Claim
19 words
The heater of claim 1 including means for indicating when the wet dressings are in the desired temperature range.
Claim 15
Dependent Claim
12 words
The heater of claim 13 wherein the indicating means comprises a light.
Claim 16
Dependent Claim
20 words
The heater of claim 1 including means for indicating when said first means is supplying current to the heating element.
Claim 17
Dependent Claim
12 words
The heater of claim 15 wherein the indicating means comprises a light.
Claim 18
Dependent Claim
21 words
The heater of claim 1 including means for indicating when the first and second means interrupt current to the heating element.
Claim 19
Dependent Claim
12 words
The heater of claim 17 wherein the indicating means comprises a light.
Claim 20
Dependent Claim
328 words
A heater for wet dressings, comprising: a case having a base with sidewalls defining a cavity, an insert within the cavity of the base and defining at least one narrow recess in the insert to receive wet dressings, the recess capable of being heated, electrical heating element means for said recess, means electrically insulating said heating element with respect to said recess, and electrical circuit means within said case interconnecting said heating element and a source of electric current; and means for controlling the temperature of the heating element in the desired range of temperature of the wet dressings, said controlling means being a part of said electrical circuit means and comprising: first means for controlling current to the heating element and for sensing the temperature associated with the heating element, said first means initially supplying current to the heating element until a first temperature is sensed substantially higher than the desired temperature range of the wet dressings, said first means interrupting current to the heating element at first sensed temperature, said first means again supplying current to the heating element at a second sensed temperature substantially below the range of desired temperature of the wet dressings, and said first means subsequently interrupting current to the heating element when said first temperature is sensed; and second means for controlling current to the heating element and for sensing the temperature associated with the heating element, said second means initially supplying current to the heating element until a third temperature is sensed higher than the desired temperature range of the wet dressings and lower than said first temperature, said second means interrupting current to the heating element at said third sensed temperature, said second means again supplying current to the heating element at a fourth sensed temperature below the range of desired temperature of the wet dressings and higher than said second temperature, and said second means subsequently interrupting current to the heating element when said third temperature is sensed.
Claim 21
Dependent Claim
328 words
A heater for wet dressings, comprising: a case having a base with sidewalls defining a cavity, an insert within the cavity of the base and defining at least one narrow recess in the insert to receive wet dressings, the recess capable of being heated, electrical heating element means for said recess, means electrically insulating said heating element with respect to said recess, and electrical circuit means within said case interconnecting said heating element and a source of electric current; and means for controlling the temperature of the heating element in the desired range of temperature of the wet dressings, said controlling means being a part of said electrical circuit means and comprising: first means for controlling current to the heating element and for sensing the temperature associated with the heating element, said first means initially supplying current to the heating element until a first temperature is sensed substantially higher than the desired temperature range of the wet dressings, said first means interrupting current to the heating element at first sensed temperature, said first means again supplying current to the heating element at a second sensed temperature substantially below the range of desired temperature of the wet dressings, and said first means subsequently interrupting current to the heating element when said first temperature is sensed; and second means for controlling current to the heating element and for sensing the temperature associated with the heating element, said second means initially supplying current to the heating element until a third temperature is sensed higher than the desired temperature range of the wet dressings and lower than said first temperature, said second means interrupting current to the heating element at said third sensed temperature, said second means again supplying current to the heating element at a fourth sensed temperature below the range of desired temperature of the wet dressings and higher than said second temperature, and said second means subsequently interrupting current to the heating element when said third temperature is sensed.
Claim 22
Dependent Claim
27 words
The heater of claim 19 including means for indicating when the first and second means interrupt current to the heating element, said indicating means comprising a light.
Claim 23
Dependent Claim
190 words
A heater for wet dressings, comprising: a case having a base with sidewalls defining a cavity; an insert within the cavity of said base and defining at least a pair of generally vertically oriented parallel recesses in said insert, each said recess being in the form of a slot and having substantial width and depth dimensions and a narrow transverse dimension so as to receive a generally flat wet dressing therein, said recesses capable of being heated; an electrical heater imbedded in an elastic material for each said recess, each heater thus being electrically insulated from its respective recess, each recess further including opposed walls having inner surfaces, defining the slot to receive a wet dressing, and outer surfaces facing said cavity, said heater being directly secured to and substantially covering said outer surfaces of the opposed walls of the recess associated therewith; electrical circuit means within said cavity interconnecting said heating element and a source of electric current; and means for controlling the temperature of the heating element in the desired range of temperature of the wet dressings, said controlling means being a part of said electrical circuit means.
Claim 24
Dependent Claim
190 words
A heater for wet dressings, comprising: a case having a base with sidewalls defining a cavity; an insert within the cavity of said base and defining at least a pair of generally vertically oriented parallel recesses in said insert, each said recess being in the form of a slot and having substantial width and depth dimensions and a narrow transverse dimension so as to receive a generally flat wet dressing therein, said recesses capable of being heated; an electrical heater imbedded in an elastic material for each said recess, each heater thus being electrically insulated from its respective recess, each recess further including opposed walls having inner surfaces, defining the slot to receive a wet dressing, and outer surfaces facing said cavity, said heater being directly secured to and substantially covering said outer surfaces of the opposed walls of the recess associated therewith; electrical circuit means within said cavity interconnecting said heating element and a source of electric current; and means for controlling the temperature of the heating element in the desired range of temperature of the wet dressings, said controlling means being a part of said electrical circuit means.
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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) | 1986-12-05 | 1987-06-06 | 1987-12-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-12-05 | 1991-06-06 | 1991-12-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-12-05 | 1995-06-06 | 1995-12-06 | $7700.00 | Window Closed / Lapsed |