Torch with integral flashback arrestor and thermal shut-off device

A flashback arrestor comprising:

• a passageway of a torch body;
• a resettable pressure-sensitive device disposed along the passageway, wherein the resettable pressure-sensitive device is modifiable from a first configuration to a second configuration in response to a pressure change in the torch body, and wherein the second configuration causes actuation of a piston within the passageway to prevent back-flow through the passageway;
• and
• a check valve disposed within the passageway.

A torch comprising:

• a torch body;
• and
• a flashback arrestor disposed within a passageway of the torch body, the flashback arrestor comprising:
• a thermal shut-off device modifiable from a first configuration to a second configuration in response to a temperature gradient in the torch body, wherein the second configuration restricts flow of a gas through the passageway;
• a retainer coupled to the torch body at an inlet of the passageway;
• a bushing coupled to the retainer;
• and
• a check valve disposed within the retainer.