US3916870A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Heater-blower assembly
Assignee: TA Pelsue Co
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Filing: 1974-10-31
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Granted: 1975-11-04
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Expires: 1994-10-31
Abstract
Abstract This invention relates to a heater-blower assembly for supplying warm air to subsurface installations that is characterized by a self-contained master blower subassembly which can be used by itself as a source of cool air and a slave heater subassembly which will only operate when connected to the blower. The subassemblies in assembled relation cooperate to shield and keep the power connection therebetween connected. The heater subassembly has a master burner and a slave burner, the master being independently operative while the slave can only operate when the master is actuated.
Inventors
- 👤 Allan E Beavers
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 22:39
CPC Classifications
F; F24; F24H; F24H3/00; F24H3/02; F24H3/06; F24H3/10; F24H3/105; F24H15/00; F24H15/30; F24H15/305; F24H15/31; F24H15/355; F24H15/36; F24H9/00; F24H9/20; F24H9/2064; F24H9/2085
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
217 words
A portable heater-blower assembly comprising in combination: a blower subassembly including an electric-motor driven forced air fan, a blower housing enclosing said fan having an outlet connectable to an air duct, and an electrical outlet within said housing alongside said air outlet facing in the same direction as the latter; a heater subassembly including at least one gas-fired burner connectable to a source of gaseous fuel, electric ignition means positioned adjacent said burner operative upon actuation to ignite same, first electrically-actuated valve means connected to control the supply of fuel to said burner; a heater housing including a plenum having an air inlet detachably connectable to the forced air outlet of the blower subassembly, a heat exchanger within said plenum positioned to receive the hot gaseous products of combustion from the burner and pass same in heat-exchange relation to the air from the blower subassembly, an electrical circuit including the electric ignition means and first electrically-actuated valve means having a plug detachably connectable to the electrical outlet of the blower subassembly, and means carried by said heater housing in opposed relation to the electrical outlet in said blower housing cooperating therewith to maintain said plug operatively connected thereto when the heater plenum inlet is connected to receive air from the forced air outlet of the blower subassembly.
Claim 2
Dependent Claim
217 words
A portable heater-blower assembly comprising in combination: a blower subassembly including an electric-motor driven forced air fan, a blower housing enclosing said fan having an outlet connectable to an air duct, and an electrical outlet within said housing alongside said air outlet facing in the same direction as the latter; a heater subassembly including at least one gas-fired burner connectable to a source of gaseous fuel, electric ignition means positioned adjacent said burner operative upon actuation to ignite same, first electrically-actuated valve means connected to control the supply of fuel to said burner; a heater housing including a plenum having an air inlet detachably connectable to the forced air outlet of the blower subassembly, a heat exchanger within said plenum positioned to receive the hot gaseous products of combustion from the burner and pass same in heat-exchange relation to the air from the blower subassembly, an electrical circuit including the electric ignition means and first electrically-actuated valve means having a plug detachably connectable to the electrical outlet of the blower subassembly, and means carried by said heater housing in opposed relation to the electrical outlet in said blower housing cooperating therewith to maintain said plug operatively connected thereto when the heater plenum inlet is connected to receive air from the forced air outlet of the blower subassembly.
Claim 3
Dependent Claim
30 words
The combination as set forth in claim 1 in which: the means carried by said heater housing in opposed relation to said blower housing electrical outlet comprises an abutment-forming step.
Claim 4
Dependent Claim
55 words
The combination as set forth in claim 1 in which: the electrical circuit includes a length of conductor terminating in the plug, said conductor length being selected such that said plug will only reach the electrical outlet in the blower housing when the forced air outlet is positioned to deliver air into the heater inlet.
Claim 5
Dependent Claim
33 words
The combination as set forth in claim 1 in which: the blower subassembly includes switch means connected to the electrical outlet operative upon actuation to energize the electrical circuit of the heater subassembly.
Claim 6
Dependent Claim
64 words
The combination as set forth in claim 1 in which: the electrical circuit of the heater subassembly includes a normally-closed temperature sensitive switch, said switch being located in the plenum in the path of the air moving therethrough from the blower subassembly, and said switch being automatically operative to de-energize said electrical circuit whenever the air temperature in said plenum exceeds a predetermined value.
Claim 7
Dependent Claim
84 words
The combination as set forth in claim 1 in which: the heater subassembly includes a second burner in position to be fired by the electric ignition means; and, in which the electrical circuit includes a second electrically-actuated valve means connected to control the supply of gas to the second burner and a first switch operative upon actuation to open said second valve means, said second valve means being located downstream of the first electrically-actuated valve means in series therewith and with said second burner.
Claim 8
Dependent Claim
50 words
The combination as set forth in claim 1 in which: the forced air outlet of the blower subassembly and the air inlet of the heater subassembly telescope one inside the other to define a continuous duct; and, in which latch means releasably maintains said inlet and outlet in telescoped relation.
Claim 9
Dependent Claim
33 words
The combination as set forth in claim 1 in which: the electrical circuit includes a second switch operative upon actuation to open said first valve means and simultaneously fire said electric ignition means.
Claim 10
Dependent Claim
33 words
The combination as set forth in claim 6 in which: the electrical circUit includes a second switch operative upon actuation to open said first valve means and simultaneously fire said electric ignition means.
Claim 11
Dependent Claim
45 words
The combination as set forth in claim 6 in which: a second heat-exchanger is mounted inside the plenum in position to receive the hot gaseous products of combustion from the second burner and pass same in heat-exchanger relation to the air from the blower subassembly.
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) | 1978-11-03 | 1979-05-05 | 1979-11-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-11-03 | 1983-05-05 | 1983-11-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-11-03 | 1987-05-05 | 1987-11-04 | $7700.00 | Window Closed / Lapsed |