Motorcycle gas cap

1 . A motorcycle gas cap for use with a motorcycle, wherein the motorcycle has a defined gas tank, the gas tank having a recessed space, a gas tank opening defined within the recessed space, and a ventilation tube to vent air, the motorcycle gas cap comprising:

a base secured into the recessed space, the base having a base opening configured for fluid exchange with the gas tank opening, the base further having a ventilation mechanism;

a gas cap removably configured to twist in one direction into a locking position and twist in an opposition direction to an unlocking position such that the gas cap is removable from the base, the gas cap having a plunger extending downwardly from the gas cap; and

a hole positioned on a top portion of the base and sized to receive the plunger such that when the gas cap is removed from the base the plunger can rest in the hole.

2 . The motorcycle gas cap of claim 1 , wherein the base includes:

a top surface face configured to fit within the gas tank opening;

a bottom member extending below the top surface face and having an opening configured around the base opening, the bottom member including a pair of diametrically opposed ramps positioned in the bottom member around the opening and further includes detents positioned at ends of the ramps;

an annual ring extending from the bottom member;

an o-ring seal placed around the annual ring of the base to form a gas and liquid tight seal between the base on the opening of the gas tank; and

the ventilation mechanism being secured to an outer edge of the bottom member, the ventilation mechanism in fluid communication with the vent tube.

3 . The motorcycle gas cap of claim 2 , wherein the ventilation mechanism of the base includes:

a block secured to the outer edge of the bottom member, the block having a chamber, a tapered portion positioned above the chamber, and an air passage;

a ball positioned into the chamber; and

a plate attached to the block to secure the ball within the chamber.

4 . The motorcycle gas cap of claim 2 , wherein the gas cap includes:

a top portion, with at least one handle extending upwardly away from the top portion,

an upper cap structure positioned below the top portion, the upper cap structure having a groove;

an o-ring situated in the groove of the upper cap structure;

the upper cap structure further having a slot bisecting the length of the upper cap structure,

a locking pin secured in the slot and having ends positioned into the ramps defined on the base when the gaps cap is inserted into the base;

a lower cap structure secured to the upper cap structure, the lower cap structure having the plunger extending downwardly from the lower cap structure; and

a spring and plunger positioned between the locking pin and the lower cap structure configured to exert a force on the locking pin to maintain the ends of the locking pin in the ramps and detent when in the locking position.

5 . The motorcycle gas cap of claim 1 , wherein the base further includes a raised feature curved along an arcuate path on the top portion of the base and a groove along the end of the arcuate path, and a raised rim positioned on the gas cap configured to be aligned with the groove when the gas cap is in a locking position and aligned with a start of the raised feature when in the unlocking position.

6 . The motorcycle gas cap of claim 1 , wherein the gas cap is rotatable approximately 45 degrees between the locking position and an unseating position.

7 . The motorcycle gas cap of claim 6 , wherein the gas cap is rotatable beyond the 45 degrees to an unlocking position configured to remove the gas cap from the base.

8 . The motorcycle gas cap of claim 2 , wherein the diametrically opposed ramps are configured in a downward clockwise rotation around the base such that the twisting of the gas cap to a locking position forces the gas cap downwardly into the base.

9 . A gas cap for use with a vehicle gas tank, wherein the vehicle gas tank having a recessed space, a gas tank opening defined within the recessed space, and a ventilation tube to vent air, the gas cap comprising:

a base secured into the recessed space, the base having a base opening configured for fluid exchange with the gas tank opening, the base further having a ventilation mechanism;

a gas cap removably configured to twist in one direction into a locking position and twist in an opposition direction to an unlocking position such that the gas cap is removable from the base, the gas cap having a plunger extending downwardly from the gas cap; and

a hole positioned on a top portion of the base and sized to receive the plunger such that when the gas cap is removed from the base the plunger can rest in the hole.

10 . The gas cap of claim 9 , wherein the base includes:

a top surface face configured to fit within the gas tank opening;

a bottom member extending below the top surface face and having an opening configured around the base opening, the bottom member including a pair of diametrically opposed ramps positioned in the bottom member around the opening and further includes detents positioned at ends of the ramps;

an annual ring extending from the bottom member;

an o-ring seal placed around the annual ring of the base to form a gas and liquid tight seal between the base on the opening of the gas tank; and

the ventilation mechanism being secured to an outer edge of the bottom member, the ventilation mechanism in fluid communication with the vent tube.

11 . The gas cap of claim 10 , wherein the ventilation mechanism of the base includes:

a block secured to the outer edge of the bottom member, the block having a chamber, a tapered portion positioned above the chamber, and an air passage;

a ball positioned into the chamber; and

a plate attached to the block to secure the ball within the chamber.

12 . The gas cap of claim 11 , wherein the gas cap includes:

a top portion, with at least one handle extending upwardly away from the top portion,

an upper cap structure positioned below the top portion, the upper cap structure having a groove;

an o-ring situated in the groove of the upper cap structure;

the upper cap structure further having a slot bisecting the length of the upper cap structure,

a locking pin secured in the slot and having ends positioned into the ramps defined on the base when the gas cap is inserted into the base;

a lower cap structure secured to the upper cap structure, the lower cap structure having the plunger extending downwardly from the lower cap structure; and

a spring and plunger positioned between the locking pin and the lower cap structure configured to exert a force on the locking pin to maintain the ends of the locking pin in the ramps and detent when in the locking position.

13 . The gas cap of claim 9 , wherein the base further includes a raised feature curved along an arcuate path on the top portion of the base and a groove along the end of the arcuate path, and a raised rim positioned on the gas cap configured to be aligned with the groove when the gas cap is in a locking position and aligned with a start of the raised feature when in the unlocking position.

14 . The gas cap of claim 9 , wherein the gas cap is rotatable approximately 45 degrees between the locking position and an unseating position.

15 . The gas cap of claim 14 , wherein the gas cap is rotatable beyond the 45 degrees to an unlocking position configured to remove the gas cap from the base.

16 . The gas cap of claim 10 , wherein the diametrically opposed ramps are configured in a downward clockwise rotation around the base such that the twisting of the gas cap to a locking position forces the gas cap downwardly into the base.