US3759245A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Heating torch
Assignee: Individual
•
Filing: 1971-12-10
•
Granted: 1973-09-18
•
Expires: 1991-12-10
Abstract
Abstract A portable heating torch for applying heat generated from a flame in a uniformly distributed pattern to a work surface in order to enable the performance of manual work such as cutting, scraping or the like on such work surface. The torch comprises a handle capable of being grasped by the hand of an operator and which is provided with a fuel delivery tube or other flexible fuel delivery means for connection to a suitable source of an ignitable fuel, and preferably a gaseous fuel such as propane or the like. A metal housing which forms an internal fuel receiving chamber is attached to and carried by the handle. The fuel employed is generally a gaseous fuel under pressure and is delivered to the fuel receiving chamber from the source through this tube or other flexible means and through a duct in the handle which is in fluid communication with the fuel delivery tube and the fuel receiving chamber. The fuel is injected into the fuel receiving chamber through an orifice therein and is mixed with air introduced into the fuel receiving chamber through a plurality of air intake apertures formed in the chamber wall. A heat application head is connected to the fuel receiving chamber and is in fluid communication therewith for receiving the fuelair mixture and enabling a flame supported by combustion of the ignitable fuel-air mixture to be uniformly applied across a preselected area of the work surface. In a preferred embodiment of the invention, a work element such as a cutting member or a scraping member is mounted on and carried by the heat application head and is located in the path of the flame so that it is simultaneously heated along with the heat applied to the work surface, and in this way permits manual work to be performed by use of the work element on the heated work surface.
Inventors
- 👤 P Greco
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 01:31
CPC Classifications
F; F23; F23D; F23D14/00; F23D14/38
Claims Analysis
Total Claims: 47
Claim 1
Independent Claim
352 words
A portable heating torch for providing a uniformly distributed heat to a work surface, said torch comprising handle forming means, fuel receiving means operatively associated with said handle forming means and including a fitting on said handle forming means, flexible conduit means for operative connection to said fitting and to a source of gaseous ignitable fuel under pressure to deliver fuel in said source to said fuel receiving means, a metal housing operatively connected to said fuel receiving means for receiving the ignitable fuel from said fuel receiving means, a mixing plug disposed within said metal housing forming a fuel mixing chamber downstream of said plug in the direction of movement of said ignitable fuel, duct means formed in said mixing plug and terminating in an orifice communicating with the mixing chamber for introducing the gaseous fuel therein under pressure to cause a venturi effect across said mixing plug, means forming a plurality of primary air intake apertures circumferentiAlly disposed about said metal housing and being located upstream of said mixing plug for introducing air into said housing, groove means formed on said plug for enabling the introduced air to be urged through said groove means into said mixing chamber by said venturi effect and for mixing the air with said fuel, heat application means operatively associated with said metal housing and having an ignition chamber therein for receiving the fuel-air mixture under pressure from said fuel mixing chamber, means forming a plurality of spaced secondary air intake apertures on said heat application means to introduce additional air into said ignition chamber for mixing with the fuel-air mixture introduced in said ignition chamber, a flame emitting orifice formed in said heat application means to permit exit of the mixture in said heat application means and a flame supported by the ignitable fuel containing mixture, an extended member on said heat application means and having a flame directing surface thereon, and said heat application means having a deflection surface to direct a flame supported by said ignitable fuel uniformly across a preselected area of said flame directing surface and outwardly from said torch.
Claim 2
Dependent Claim
352 words
A portable heating torch for providing a uniformly distributed heat to a work surface, said torch comprising handle forming means, fuel receiving means operatively associated with said handle forming means and including a fitting on said handle forming means, flexible conduit means for operative connection to said fitting and to a source of gaseous ignitable fuel under pressure to deliver fuel in said source to said fuel receiving means, a metal housing operatively connected to said fuel receiving means for receiving the ignitable fuel from said fuel receiving means, a mixing plug disposed within said metal housing forming a fuel mixing chamber downstream of said plug in the direction of movement of said ignitable fuel, duct means formed in said mixing plug and terminating in an orifice communicating with the mixing chamber for introducing the gaseous fuel therein under pressure to cause a venturi effect across said mixing plug, means forming a plurality of primary air intake apertures circumferentiAlly disposed about said metal housing and being located upstream of said mixing plug for introducing air into said housing, groove means formed on said plug for enabling the introduced air to be urged through said groove means into said mixing chamber by said venturi effect and for mixing the air with said fuel, heat application means operatively associated with said metal housing and having an ignition chamber therein for receiving the fuel-air mixture under pressure from said fuel mixing chamber, means forming a plurality of spaced secondary air intake apertures on said heat application means to introduce additional air into said ignition chamber for mixing with the fuel-air mixture introduced in said ignition chamber, a flame emitting orifice formed in said heat application means to permit exit of the mixture in said heat application means and a flame supported by the ignitable fuel containing mixture, an extended member on said heat application means and having a flame directing surface thereon, and said heat application means having a deflection surface to direct a flame supported by said ignitable fuel uniformly across a preselected area of said flame directing surface and outwardly from said torch.
Claim 3
Dependent Claim
47 words
The portable heating torch of claim 1 further characterized in that a work member forms part of the extended member operatively mounted on said heat application means for engaging the work surface and performing work on said work surface through manual actuation of said handle forming means.
Claim 4
Dependent Claim
19 words
a head member on said cylindrical member and extending forwardly Thereof in the direction of movement of the fuel,
Claim 5
Dependent Claim
19 words
a head member on said cylindrical member and extending forwardly Thereof in the direction of movement of the fuel,
Claim 6
Dependent Claim
19 words
a head member on said cylindrical member and extending forwardly thereof in the direction of movement of the fuel,
Claim 7
Dependent Claim
19 words
a head member on said cylindrical member and extending forwardly thereof in the direction of movement of the fuel,
Claim 8
Dependent Claim
25 words
said head member being diametrically reduced with respect to said cylindrical member so as to be spaced from the interior wall of said metal housing,
Claim 9
Dependent Claim
25 words
said head member being diametrically reduced with respect to said cylindrical member so as to be spaced from the interior wall of said metal housing,
Claim 10
Dependent Claim
25 words
said head member being diametrically reduced with respect to said cylindrical member so as to be spaced from the interior wall of said metal housing,
Claim 11
Dependent Claim
25 words
said head member being diametrically reduced with respect to said cylindrical member so as to be spaced from the interior wall of said metal housing,
Claim 12
Dependent Claim
64 words
The portable heating torch of claim 1 further characterized in that a work member forms part of the extended member operatively mounted on said heat application means for engaging the work surface and performing work on said work surface through manual actuation of said handle forming means and that said work member is located to also receive the heat from said heat application means.
Claim 13
Dependent Claim
39 words
The portable heating torch of claim 1 further characterized in that the flame emitting orifice in said heat application means is a relatively thin elongated orifice permitting the application of a relatively thin elongated flame to said work surface.
Claim 14
Dependent Claim
17 words
a rearwardly extending member on said opposite side of said cylindrical member with respect to head member,
Claim 15
Dependent Claim
17 words
a rearwardly extending member on said opposite side of said cylindrical member with respect to head member,
Claim 16
Dependent Claim
18 words
a rearwardly extending member on said the opposite side of said cylindrical member with respect to head member,
Claim 17
Dependent Claim
18 words
a rearwardly extending member on said the opposite side of said cylindrical member with respect to head member,
Claim 18
Dependent Claim
28 words
said rearwardly extending member also being diametrically reduced with respect to said cylindrical member so as to also be spaced from the interior wall of said metal housing,
Claim 19
Dependent Claim
28 words
said rearwardly extending member also being diametrically reduced with respect to said cylindrical member so as to also be spaced from the interior wall of said metal housing,
Claim 20
Dependent Claim
28 words
said rearwardly extending member also being diametrically reduced with respect to said cylindrical member so as to also be spaced from the interior wall of said metal housing,
Claim 21
Dependent Claim
28 words
said rearwardly extending member also being diametrically reduced with respect to said cylindrical member so as to also be spaced from the interior wall of said metal housing,
Claim 22
Dependent Claim
64 words
The portable heating torch of claim 1 further characterized in that the flame emitting orifice in said heat application means is a relatively thin elongated orifice permitting the application of a relatively thin elongated flame to said work surface, and that said deflection surface is located to direct said flame in a proper direction across said flame directing surface and toward said work surface.
Claim 23
Dependent Claim
28 words
The portable heating torch of claim 2 further characterized in that said work member is a cutting member having an edge capable of cutting through a work surface.
Claim 24
Dependent Claim
20 words
said cylindrical member, said head member and said rearwardly extending member having a plurality of circumferentially spaced axially extending grooves,
Claim 25
Dependent Claim
20 words
said cylindrical member, said head member and said rearwardly extending member having a plurality of circumferentially spaced axially extending grooves,
Claim 26
Dependent Claim
15 words
at least said cylindrical member and said head member having groove means extending axially therealong,
Claim 27
Dependent Claim
15 words
at least said cylindrical member and said head member having groove means extending axially therealong,
Claim 28
Dependent Claim
9 words
an axially extending duct formed in said mixing plug,
Claim 29
Dependent Claim
9 words
an axially extending duct formed in said mixing plug,
Claim 30
Dependent Claim
9 words
an axially extending duct formed in said mixing plug,
Claim 31
Dependent Claim
9 words
an axially extending duct formed in said mixing plug,
Claim 32
Dependent Claim
32 words
The portable heating torch of claim 2 further characterized in that said work member is a scraping member having an elongated edge capable of scraping a coating off of a work surface.
Claim 33
Dependent Claim
136 words
A hand operable portable heating torch for providing a uniformly distributed heat to a work surface, said torch comprising: a. handle forming means, b. fuel receiving means operatively associated with said handle forming means, c. said fuel receiving means including a fitting on said handle forming means, d. flexible conduit means for operative connection to said fitting and to a source of gaseous ignitable fuel under pressure to deliver fuel in said source to said fuel receiving means, e. a metal housing operatively connected to said fuel receiving means for receiving the ignitable fuel from said fuel receiving means, f. a mixing plug disposed within said metal housing, g. said metal housing forming a fuel mixing chamber downstream of said plug in the direction of movement of said ignitable fuel, h. said fuel mixing plug comprising:
Claim 34
Dependent Claim
136 words
A hand operable portable heating torch for providing a uniformly distributed heat to a work surface, said torch comprising: a. handle forming means, b. fuel receiving means operatively associated with said handle forming means, c. said fuel receiving means including a fitting on said handle forming means, d. flexible conduit means for operative connection to said fitting and to a source of gaseous ignitable fuel under pressure to deliver fuel in said source to said fuel receiving means, e. a metal housing operatively connected to said fuel receiving means for receiving the ignitable fuel from said fuel receiving means, f. a mixing plug disposed within said metal housing, g. said metal housing forming a fuel mixing chamber downstream of said plug in the direction of movement of said ignitable fuel, h. said fuel mixing plug comprising:
Claim 35
Dependent Claim
245 words
said axially extending duct terminating in an orifice communicating with the mixing chamber for introducing the gaseous fuel therein under pressure to cause a venturi effect across said mixing plug, i. means forming a plurality of primary air intake apertures circumferentially disposed about said metal housing and being located upstream of said mixing plug for introducing air into said housing, j. said groove means formed on said plug for enabling the introduced air to be urged through said groove means into said mixing chamber by said venturi effect and for mixing the air with said fuel, k. heat application means operatively associated with said metal housing and having an ignition chamber therein for receiving the fuel-air mixture under pressure from said fuel mixing chamber, l. means forming a plurality of spaced secondary air intake apertures on said heat application means to introduce additional air into said ignition chamber for mixing with the fuel-air mixture introduced in said ignition chamber, m. means forming a flame emitting orifice in said heat application means to permit exit of the mixture in said head application means and a flame supported by the ignitable fuel containing mixture, n. an extended member on said heat application means, o. said extended member having a flame directing surface thereon, p. and said heat application means having a deflection surface to direct a flame supported by said ignitable fuel uniformly across a preselected area of said flame directing surface and outwardly from said torch.
Claim 36
Dependent Claim
245 words
said axially extending duct terminating in an orifice communicating with the mixing chamber for introducing the gaseous fuel therein under pressure to cause a venturi effect across said mixing plug, i. means forming a plurality of primary air intake apertures circumferentially disposed about said metal housing and being located upstream of said mixing plug for introducing air into said housing, j. said groove means formed on said plug for enabling the introduced air to be urged through said groove means into said mixing chamber by said venturi effect and for mixing the air with said fuel, k. heat application means operatively associated with said metal housing and having an ignition chamber therein for receiving the fuel-air mixture under pressure from said fuel mixing chamber, l. means forming a plurality of spaced secondary air intake apertures on said heat application means to introduce additional air into said ignition chamber for mixing with the fuel-air mixture introduced in said ignition chamber, m. means forming a flame emitting orifice in said heat application means to permit exit of the mixture in said head application means and a flame supported by the ignitable fuel containing mixture, n. an extended member on said heat application means, o. said extended member having a flame directing surface thereon, p. and said heat application means having a deflection surface to direct a flame supported by said ignitable fuel uniformly across a preselected area of said flame directing surface and outwardly from said torch.
Claim 37
Dependent Claim
303 words
said axially extending duct terminating in an orifice communicating with the mixing chamber for introducing the gaseous fuel therein under pressure to cause a venturi effect across said mixing plug, h. means forming a plurality of primary air intake apertures circumferentially disposed about said metal housing and being located upstream of said mixing plug for introducing air into said housing, i. said axially extending grooves formed on said plug enabling the introduced air to be urged through said grooves into said mixing chamber by said venturi effect for mixing the air with said fuel, j. a flame application head operatively attached to said metal housing, k. said flame producing head having an outer wall forming housing and having an ignition chamber therein for receiving the fuel-air mixture under pressure from said fuel mixing chamber, l. means forming a plurality of spaced secondary air intake apertures on said wall forming housing to introduce additional air into said ignition chamber for mixing with the fuel-air mixture introduced in said ignition chamber, m. means forming a relatively thin elongated flame emitting orifice in said outer wall forming housing to permit exit of the mixture in said ignition chamber and a flame supported by the ignitable fuel containing mixture, n. a downwardly and outwardly directed extended member on said outer wall forming housing, o. said extended member having an upwardly presented flame directing surface thereon, p. said wall forming housing having an interior deflection surface to direct a flame supported by said ignitable fuel uniformly across a preselected area of said flame directing surface and outwardly from said torch toward said work surface, q. and a work element formed on the outer end of said extended member and having a relatively sharp edge capable of engaging and cutting into at least a portion of the work surface.
Claim 38
Dependent Claim
303 words
said axially extending duct terminating in an orifice communicating with the mixing chamber for introducing the gaseous fuel therein under pressure to cause a venturi effect across said mixing plug, h. means forming a plurality of primary air intake apertures circumferentially disposed about said metal housing and being located upstream of said mixing plug for introducing air into said housing, i. said axially extending grooves formed on said plug enabling the introduced air to be urged through said grooves into said mixing chamber by said venturi effect for mixing the air with said fuel, j. a flame application head operatively attached to said metal housing, k. said flame producing head having an outer wall forming housing and having an ignition chamber therein for receiving the fuel-air mixture under pressure from said fuel mixing chamber, l. means forming a plurality of spaced secondary air intake apertures on said wall forming housing to introduce additional air into said ignition chamber for mixing with the fuel-air mixture introduced in said ignition chamber, m. means forming a relatively thin elongated flame emitting orifice in said outer wall forming housing to permit exit of the mixture in said ignition chamber and a flame supported by the ignitable fuel containing mixture, n. a downwardly and outwardly directed extended member on said outer wall forming housing, o. said extended member having an upwardly presented flame directing surface thereon, p. said wall forming housing having an interior deflection surface to direct a flame supported by said ignitable fuel uniformly across a preselected area of said flame directing surface and outwardly from said torch toward said work surface, q. and a work element formed on the outer end of said extended member and having a relatively sharp edge capable of engaging and cutting into at least a portion of the work surface.
Claim 39
Dependent Claim
43 words
The hand operable heating torch of claim 8 further characterized in that a work element is formed on said extending member and said work element has a relatively sharp edge capable of engaging and penetrating at least a portion of the work surface.
Claim 40
Dependent Claim
43 words
The hand operable heating torch of claim 8 further characterized in that a work element is formed on said extending member and said work element has a relatively sharp edge capable of engaging and cutting at least a portion of the work surface.
Claim 41
Dependent Claim
40 words
The hand operable heating torch of claim 8 further characterized in that a work element is formed on said extended member and has a relatively sharp edge capable of engaging and scraping at least a portion of the work surface.
Claim 42
Dependent Claim
34 words
The hand operable heating torch of claim 8 further characterized in that valve means is operatively associated with said fuel receiving means to regulate the amount of fuel introduced into said fuel mixing chamber.
Claim 43
Dependent Claim
40 words
The hand operable heating torch of claim 8 further characterized in that the flame emitting orifice in said heat application means is a relatively thin elongated orifice permitting the application of a relatively thin elongated flame to said work surface.
Claim 44
Dependent Claim
65 words
The hand operable heating torch of claim 8 further characterized in that the flame emitting orifice in said heat application means is a relatively thin elongated orifice permitting the application of a relatively thin elongated flame to said work surface, and that said deflection surface is located to direct said flame in a proper direction across said flame directing surface and toward said work surface.
Claim 45
Dependent Claim
155 words
A portable heating torch for providing a uniformly distributed heat to a worK surface and being operable upon manual application of force to apply work to said work surface; said torch comprising: a. handle forming means, b. a fuel receiving duct operatively formed in said handle forming means, c. a fitting on said handle forming means and communicating with said fuel receiving duct, d. a flexible conduit for operative connection to said fitting and to a source of gaseous ignitable fuel under pressure to deliver fuel in said source to said fuel receiving duct, e. a metal housing operatively connected to said handle forming means and communicating with the fuel receiving duct for receiving the ignitable fuel from said fuel receiving duct, f. a mixing plug disposed within said metal housing forming a fuel mixing chamber downstream of said plug in the direction of movement of said ignitable fuel, g. said fuel mixing plug comprising:
Claim 46
Dependent Claim
155 words
A portable heating torch for providing a uniformly distributed heat to a worK surface and being operable upon manual application of force to apply work to said work surface; said torch comprising: a. handle forming means, b. a fuel receiving duct operatively formed in said handle forming means, c. a fitting on said handle forming means and communicating with said fuel receiving duct, d. a flexible conduit for operative connection to said fitting and to a source of gaseous ignitable fuel under pressure to deliver fuel in said source to said fuel receiving duct, e. a metal housing operatively connected to said handle forming means and communicating with the fuel receiving duct for receiving the ignitable fuel from said fuel receiving duct, f. a mixing plug disposed within said metal housing forming a fuel mixing chamber downstream of said plug in the direction of movement of said ignitable fuel, g. said fuel mixing plug comprising:
Claim 47
Dependent Claim
34 words
The portable heating torch of claim 15 further characterized in that a manually operable valve is operatively mounted on said handle forming means to control the flow of fuel through said fuel receIving duct.
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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) | 1976-09-17 | 1977-03-19 | 1977-09-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-09-17 | 1981-03-19 | 1981-09-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-09-17 | 1985-03-19 | 1985-09-18 | $7700.00 | Window Closed / Lapsed |