Blow Torch with Safety Control Device

• US 20190093890A1
• Filed: 12/22/2017
• Published: 03/28/2019
• Est. Priority Date: 09/25/2017
• Status: Active Grant

• Current Assignee: Pro-Iroda Industries, Inc.
• Original Assignee: Pro-Iroda Industries, Inc.
• Inventors: Shen, Jian-Jhang
• Granted Patent: US 10,731,854 B2
• Time in Patent Office: Days
• CPC Class Codes: F23D 14/38 Torches, e.g. for brazing or heating nozzles F23D14/48
• CPC Class Codes: F23D 2207/00 Ignition devices associated with burner
• CPC Class Codes: F23Q 7/06 structurally associated with fluid-fuel burners lighters containing fuel F23Q2/00
• CPC Class Codes: F23Q 7/24 Safety arrangements

Abstract

A blow torch includes a casing, an igniter received within the interior, and a safety control device for preventing the actuator being operated from an unactuated position to an actuated position movably coupled to the casing and connected to the igniter. The safety control device includes an actuator movably coupled to the casing, a release movably coupled to the actuator, a first biasing member positioned between the actuator and the release, a retainer movably coupled to the actuator, and a second biasing member positioned between the actuator and the retainer.

Claims

1. A safety control device of a blow torch comprising:

an actuator;

a release movably coupled to the actuator, wherein the release is operably movable from a retaining position such that the actuator is retained to a released position such that the actuator is adapted to be operably moved, wherein the release has a first stop tab and a second stop tab protruding from the first stop tab;

a first biasing member positioned between the actuator and the release, wherein the release is urged by the first biasing member; and

a second biasing member positioned between the actuator and the retainer, wherein the retainer is urged by the second biasing member;

wherein when the release is in the retaining position, a surface of the first stop tab where the second stop tab protrudes is disengaged from the retaining wall and the second stop tab is positioned at a first distance from the retainer; and

wherein when the release is in the released position, the surface of the first stop tab is retained on the retaining wall and the second stop tab is positioned at a second distance, which is smaller than the first distance, from the retainer.

2. The safety control device as claimed in claim 1, wherein the retainer has another retaining wall for retaining the first stop tab, wherein the first stop tab has a back surface retained on another retaining wall when the release is in the retaining position, and wherein the back surface is disengaged from another retaining wall when the release is in the released position.

3. The safety control device as claimed in claim 1, wherein the retaining wall has a cavity for retaining the second stop tab, wherein the second stop tab is retained within the cavity when the retainer is in the second position, and wherein the second stop tab is positioned outside the cavity when the retainer is in the first position.

4. The safety control device as claimed in claim 2, wherein the retaining wall has a cavity for retaining the second stop tab, wherein the second stop tab is retained within the cavity when the retainer is in the second position, and wherein the second stop tab is positioned outside the cavity when the retainer is in the first position.

5. The safety control device as claimed in claim 3, wherein the first and second stop tabs have different widths, and wherein the second stop tab has a smaller width than the first stop tab.

6. The safety control device as claimed in claim 5, wherein another retaining wall is contiguous to the retaining wall.

7. The safety control device as claimed in claim 6, wherein the retainer has a through hole and the release extends through the through hole, and wherein the cavity is contiguous with the through hole.

8. The safety control device as claimed in claim 4, wherein the actuator includes a guide track and the release is movably coupled to the guide track such that the release moves on the guide track when it changes between the retaining and the released positions.

9. The safety control device as claimed in claim 8, wherein the retainer has opposite first and second sides positioned on opposite first and second sides of the actuator.

10. The safety control device as claimed in claim 9, wherein the actuator has a first lug extending from the first side and a second lug extending from the second side respectively, wherein the retainer has a third lug extending from the first side and a fourth lug extending from the second side respectively, and wherein the first lug is movably coupled to the third lug and the second lug is movably coupled to the fourth lug respectively.

11. A blow torch comprising:

a casing having an interior with a first block surface;

an igniter received within the interior; and

a safety control device movably coupled to the casing and connected to the igniter;

wherein the safety control device including;

an actuator movably coupled to the casing, wherein the actuator is operably movable from an unactuated position to an actuated position;

a release movably coupled to the actuator, wherein the release is operably movable from a retaining position for retaining the actuator in the unactuated position to a released position such that the actuator is adapted to be operably moved from the unactuated position to the actuated position, wherein the release has a first stop tab and a second stop tab protruding from the first stop tab;

a first biasing member positioned between the actuator and the release, wherein the release is urged by the first biasing member;

a retainer movably coupled to the actuator and having a retaining wall, wherein the retainer is positioned in a first position when the release is in the retaining position and is shifted to a second position when the release is operably moved from the retaining position to the released position; and

a second biasing member positioned between the actuator and the retainer, wherein the retainer is urged by the second biasing member;

wherein when the release is in the retaining position, a surface of the first stop tab where the second stop tab protrudes is disengaged from the retaining wall and the second stop tab is positioned at a first distance from the retainer and retained on the first block surface; and

wherein when the release is in the released position, the surface of the first stop tab is retained on the retaining wall and the second stop tab is positioned at a second distance, which is smaller than the first distance, from the retainer and is disengaged from the first block surface.

12. The blow torch as claimed in claim 11, wherein the retainer has another retaining wall for retaining the first stop tab, wherein the first stop tab has a back surface retained on another retaining wall when the release is in the retaining position, and wherein the back surface is disengaged from another retaining wall when the release is in the released position.

13. The blow torch as claimed in claim 11, wherein the retaining wall has a cavity for retaining the second stop tab, wherein the second stop tab is retained within the cavity when the retainer is in the second position, and wherein the second stop tab is positioned outside the when the retainer is in the first position.

14. The blow torch as claimed in claim 12, wherein the retaining wall has a cavity for retaining the second stop tab, wherein the second stop tab is retained within the cavity when the retainer is in the second position, and wherein the second stop tab is positioned outside the cavity when the retainer is in the first position.

15. The blow torch as claimed in claim 11, wherein the retainer has a third stop tab and the interior of the casing has a second block surface for retaining the third stop tab, wherein the retainer is disengaged from the second block surface when the actuator is in the unactuated position, and wherein the third stop tab is retained on the second block surface when the actuator is moved to a position between the unactuated position and the actuated position.

16. The blow torch as claimed in claim 15, wherein the retainer has another retaining wall for retaining the first stop tab, wherein the first stop tab has a back surface retained on another retaining wall when the release is in the retaining position, wherein the back surface is disengaged from another retaining wall when the release is in the released position, wherein the retaining wall has a cavity for retaining the second stop tab, wherein the second stop tab is retained within the cavity when the retainer is in the second position, and wherein the second stop tab is positioned outside the cavity when the retainer is in the first position.

17. The blow torch as claimed in claim 11, wherein the igniter is fluidly connected to a fuel container and the safety control device includes a pushing component with a first pushing end connected to the igniter and a second pushing end connected to the fuel container, and wherein the pushing component is coupled to the actuator.

18. The blow torch as claimed in claim 15, wherein the retainer has another retaining wall for retaining the first stop tab, wherein the first stop tab has a back surface retained on another retaining wall when the release is in the retaining position, wherein the back surface is disengaged from another retaining wall when the release is in the released position, wherein the retaining wall has a cavity for retaining the second stop tab, wherein the second stop tab is retained within the cavity when the retainer is in the second position, and wherein the second stop tab is positioned outside the cavity when the retainer is in the first position.

19. The blow torch as claimed in claim 11 further comprising a lock movably coupled to the casing, and wherein the actuator is selectively held in the actuated position by the lock.

20. The blow torch as claimed in claim 19, wherein the retainer has another retaining wall for retaining the first stop tab, wherein the first stop tab has a back surface retained on another retaining wall when the release is in the retaining position, wherein the back surface is disengaged from another retaining wall when the release is in the released position, wherein the retaining wall has a cavity for retaining the second stop tab, wherein the second stop tab is retained within the cavity when the retainer is in the second position, and wherein the second stop tab is positioned outside the cavity when the retainer is in the first position.