Fastener-driving tool with multiple combustion chambers and usable with fuel canisters of varying lengths

1. A fastener-driving tool comprising: a housing; a combustion cylinder supported by the housing and defining a combustion chamber; a fuel assembly supported by the housing; and a canister mounting subassembly supported by the housing and including a fuel canister mounting carriage movable from a rest position to a dispense position, the fuel canister mounting carriage configured to removably receive a fuel canister, wherein the fuel canister mounting carriage includes: (a) a body including longitudinally extending ribs; (b) first, second, and third spaced-apart pairs of canister-retainer fingers formed with the body; (c) first, second, and third spaced-apart mounting elements; and (d) a fuel canister closure engager formed with the body.

2. The fastener-driving tool of claim 1 , wherein the fuel canister mounting carriage is configured to removable receive fuel canister of a plurality of different lengths.

3. The fastener-driving tool of claim 1 , wherein the canister mounting subassembly includes a canister mover.

4. The fastener-driving tool of claim 3 , wherein the canister mover is coupled to the fuel canister mounting carriage to cause the fuel canister mounting carriage to move from the rest position to the dispense position.

5. The fastener-driving tool of claim 1 , which includes a workpiece-contact element movable between an extended position and a retracted position, wherein movement of the workpiece-contact element from the extended position to the retracted position causes the canister mover to move the fuel canister mounting carriage.

6. The fastener-driving tool of claim 1 , wherein the fuel canister mounting carriage defines a lip-receiving channel sized to receive a lip of a cover of the fuel canister and to prevent the fuel canister from moving longitudinally and laterally relative to the fuel canister mounting carriage.

7. The fastener-driving tool of claim 6 , wherein the fuel canister mounting carriage includes a pair of fingers sized and shaped to receive and retain an outer housing of the fuel canister.

8. The fastener-driving tool of claim 1 , which is configured to enable a biasing element of the fuel canister to bias the fuel canister mounting carriage to the rest position when the fuel canister is received in and held by the fuel canister mounting carriage.

9. The fastener-driving tool of claim 1 , wherein the canister-retaining fingers are sized and shaped such that each pair of canister-retaining fingers is configured to hold an outer housing of the fuel canister via a snap fit.

10. The fastener-driving tool of claim 1 , wherein the pairs of canister-retaining fingers are spaced apart to accommodate fuel canisters of varying lengths.

11. A fastener-driving tool comprising:

a combustion cylinder defining a combustion chamber; and

a fuel assembly comprising:

a fuel routing subassembly configured to direct a fuel/air mixture to the combustion chamber;

a canister-mounting carriage movable relative to the fuel routing subassembly from a rest position to a dispense position, the canister-mounting carriage configured to hold a fuel canister such that the fuel canister moves with the canister-mounting carriage; and

a canister mover movable from a rest position to a dispense position to cause the canister-mounting carriage to move from the rest position to the dispense position,

wherein the canister-mounting carriage defines a lip-receiving channel sized to receive a lip of a cover of the fuel canister and to prevent the fuel canister from moving longitudinally and laterally relative to the canister-mounting carriage; and

wherein the canister-mounting carriage includes a pair of fingers sized and shaped to receive and retain an outer housing of the fuel canister.

12. The fastener-driving tool of claim 11 , which includes a workpiece-contact element movable between an extended position and a retracted position, wherein movement of the workpiece-contact element form the extended position to the retracted position causes the canister mover to move the canister-mounting carriage from the rest position to the dispense position.

13. The fastener-driving tool of claim 11 , which is configured to enable a biasing element of the fuel canister to bias the canister-mounting carriage to the rest position when the fuel canister is received in and held by the canister-mounting carriage.

14. The fastener-driving tool of claim 11 , wherein the canister-mounting carriage includes a body including longitudinally extending ribs; first, second, and third spaced-apart pairs of canister-holding fingers formed with the body; first, second, and third spaced-apart mounting elements; and a fuel canister closure engager formed with the body.

15. The fastener-driving tool of claim 14 , wherein the canister-retaining fingers are sized and shaped such that each pair of canister-retaining fingers is configured to hold the outer housing of the fuel canister via a snap fit.

16. The fastener-driving tool of claim 15 , wherein the pairs of the canister-retaining fingers are spaced apart to accommodate fuel canisters of varying lengths.

17. A fastener-driving tool comprising:

a combustion cylinder defining a combustion chamber; and

a fuel assembly comprising:

a fuel routing subassembly configured to direct a fuel/air mixture to the combustion chamber;

a canister-mounting carriage movable relative to the fuel routing subassembly from a rest position to a dispense position, the canister-mounting carriage configured to hold a fuel canister such that the fuel canister moves with the canister-mounting carriage; and

a canister mover movable from a rest position to a dispense position to cause the canister-mounting carriage to move from the rest position to the dispense position,

wherein the canister-mounting carriage includes: (a) a body including longitudinally extending ribs; (b) first, second, and third spaced-apart pairs of canister-holding fingers formed with the body; (c) first, second, and third spaced-apart mounting elements; and (d) a fuel canister closure engager formed with the body.

18. The fastener-driving tool of claim 17 , wherein the canister-retaining fingers are sized and shaped such that each pair of canister-retaining fingers is configured to hold the outer housing of the fuel canister via a snap fit.

19. The fastener-driving tool of claim 18 , wherein the pairs of the canister-retaining fingers are spaced apart to accommodate fuel canisters of varying lengths.

20. The fastener-driving tool of claim 17 , which includes a workpiece-contact element movable between an extended position and a retracted position, wherein movement of the workpiece-contact element form the extended position to the retracted position causes the canister mover to move the canister-mounting carriage from the rest position to the dispense position.