Quick-on fuel cap

A cap engageable with a filler neck having a mouth and an internal flange, the cap comprising

• means for closing the mouth of the filler neck, the closing means including a core and a sleeve around and adjacent to the core, the sleeve being movable relative to the core and carrying a sealing ring configured to engage the filler neck at its mouth upon insertion of the core in an axially inward direction into the filler neck, and
• means for gripping the filler neck to compress the sealing ring between the sleeve and the filler neck so that a fuel vapor seal is established between the closing means and the filler neck in response to movement of the core relative to the sleeve in a cap-installation direction, the gripping means including retaining lug means coupled to the core for anchoring the core to the filler neck to establish an anchored position of the core and to block withdrawal of the core from the filler neck, anti-rotation means for engaging the internal flange in the filler neck to permit axial movement of the sleeve into and out of the filler neck upon insertion of the closing means into the filler neck to engage the sealing ring and the filler neck, and a spring acting between the core and sleeve and yieldably urging the core and sleeve in opposite directions and moving the sleeve further into the filler neck relative to the filler neck while the core is in its anchored position and the anti-rotation means engages the internal flange in the filler neck so that the sealing ring is compressed between the sleeve and the filler neck.

A cap engageable with a filler neck having a mouth and an internal flange, the cap comprising

• means for closing the mouth of the filler neck, the closing means including a core and a sleeve around and adjacent to the core, the sleeve being movable relative to the core and carrying a sealing ring configured to engage the filler neck at its mouth upon insertion of the core in an axially inward direction into the filler neck, and
• means for gripping the filler neck to compress the sealing ring between the sleeve and the filler neck so that a fuel vapor seal is established between the closing means and the filler neck in response to movement of the core relative to the sleeve in a cap-installation direction, the gripping means including retaining lug means coupled to the core for anchoring the core to the filler neck to establish an anchored position of the core and to block withdrawal of the core from the filler neck, anti-rotation means for engaging the internal flange in the filler neck to permit axial movement of the sleeve into and out of the filler neck upon insertion of the closing means into the filler neck to engage the sealing ring and the filler neck, and spring means for yieldably urging the core and sleeve in opposite directions to move the sleeve further into the filler neck relative to the filler neck while the core is in its anchored position and the anti-rotation means engages the internal flange in the filler neck so that the sealing ring is compressed between the sleeve and the filler neck, the core including a cylindrical member having an axially outer end and an axially inner end, the sleeve being formed to include a passageway extending therethrough and containing the cylindrical member, the gripping means further including a ring member appended to the axially inner end of the cylindrical member and arranged to surround the axially inner end of the cylindrical member, and the retaining lug means including at least one retaining lug appended to the ring member and configured to engage a radially inwardly extending flange in the filler neck upon rotation of the core relative to the filler neck.

A cap engageable with a filler neck having a mouth, the cap comprising

• means for closing the mouth of the filler neck, the closing means including a core and a sleeve adjacent to the core, the sleeve being movable relative to the core and carrying a sealing ring configured to engage the filler neck at its mouth upon insertion of the core in an axially inward direction into the filler neck, and
• means for gripping the filler neck to compress the sealing ring between the sleeve and the filler neck so that a fuel vapor seal is established between the closing means and the filler neck in response to movement of the core relative to the sleeve in a cap-installation direction, the gripping means including means coupled to the core for anchoring the core to the filler neck to establish an anchored position of the core and to block withdrawal of the core from the filler neck and spring means for yieldably urging the core and sleeve in opposite directions to move the sleeve further into the filler neck relative to the filler neck while the core is in its anchored position so that the sealing ring is compressed between the sleeve and the filler neck, the core including a cylindrical member having an axially outer end and an axially inner end, the sleeve being formed to include a passageway extending therethrough and containing the cylindrical member, the gripping means further including a ring member appended to the axially inner end of the cylindrical member and arranged to surround the axially inner end of the cylindrical member, the anchoring means including at least one retaining lug appended to the ring member and configured to engage a radially inwardly extending flange in the filler neck upon rotation of the core relative to the filler neck, the gripping means further including a cam follower appended to the sleeve and a cam appended to the ring member to lie between the at least one retaining lug and the cylindrical member, the spring means being coupled to the sleeve and to a radially outwardly extending flange coupled to the axially outer end of the cylindrical member to urge the cam follower into engagement with the cam, and the cam defining means for camming the cam follower in response to rotation of the core relative to the filler neck to move the at least one retaining lug into engagement with the radially inwardly extending flange on the filler neck to release the sleeve so that the spring means moves the sleeve in an axially inward direction relative to the filler neck to compress the sealing ring between the sleeve and the filler neck.

A cap rotatably engageable with a filler neck having a mouth and an internal flange, the cap comprising

• means for closing the mouth of the filler neck, the closing means including a core having a retaining lug and a cam member, a sleeve sealingly engaging the core, the sleeve including a cam follower engaging the cam member, a sealing ring configured to engage the filler neck at its mouth, and anti-rotation means for engaging the internal flange in the filler neck to permit axial movement of the sleeve into and out of the filler neck and to block rotation of the sleeve relative to the filler neck upon insertion of the closing means into the filler neck to engage the sealing ring and the filler neck, and spring means for yieldably biasing the sleeve to urge the sealing ring against the filler neck and the cam follower in a first direction into the filler neck and against the cam member, and
• means for rotating the core relative to the sleeve once the anti-rotation means of the sleeve is coupled to the internal flange in the filler neck to move the retaining lug on the core into locking engagement with the internal flange of the filler neck and to move the cam member relative to the cam follower to allow the spring means to urge the cam follower downwardly in said first direction into the filler neck so that withdrawal of the closing means from the filler neck is blocked by engagement of the retaining lug and the internal flange and the spring means is allowed to expand and move the sealing ring further against the filler neck to establish a fuel vapor seal between the closing means and the filler neck.

A cap engageable with a filler neck having a mouth and a flange portion disposed axially inwardly from said mouth internally in said neck, the cap comprising

• means for closing the mouth of the filler neck, the closing means including a core insertable into said neck, and a sleeve about at least an axially outer portion of the core, the sleeve being axially movable relative to the core and carrying a sealing ring configured to engage the filler neck at its mouth upon insertion of the core and the sleeve in an axially inward direction into the filler neck, and
• means for gripping the flange portion in the filler neck to compress the sealing ring between the sleeve and the filler neck mouth so that a fuel vapor seal is established between the closing means and the filler neck in response to rotational movement of the core relative to the sleeve in a cap-installation direction, the gripping means including a cam follower appended to the sleeve, a cam appended to the core, retaining lug means appended to the core for selectively engaging the filler neck to block removal of the closing means from the filler neck, and spring means for yieldably urging the cam follower into engagement with the cam, and the cam includes means for camming the cam follower in response to rotational movement of the core relative to the filler neck to release the sleeve so that the spring means moves the sleeve in an axially inward direction relative to the filler neck to compress the sealing ring between the sleeve and the filler neck.

A cap engageable with a filler neck having a mouth and a flange portion disposed axially inwardly from said mouth internally in said neck, said flange portion including radially inwardly extending abutments, the cap comprising

• means for closing the mouth of the filler neck, the closing means including a core insertable into said neck, and a sleeve about at least an axially outer portion of the core, the sleeve being axially movable relative to the core and carrying a sealing ring configured to engage the filler neck at its mouth upon insertion of the core and the sleeve in an axially inward direction into the filler neck, and
• means for gripping the flange portion in the filler neck to compress the sealing ring between the sleeve and the filler neck mouth so that a fuel vapor seal is established between the closing means and the filler neck in response to rotational movement of the core relative to the sleeve in a cap-installation direction after the core and sleeve are inserted in said neck, said gripping means including first engaging means disposed on said sleeve for engaging said filler neck abutments to prevent rotation of said sleeve in said filler neck and second engaging means for engaging said filler neck abutments when said core is moved rotationally relative to said sleeve to prevent axial outward movement of said cap from said neck, the second engaging means being disposed on said core, a spring acting between the core and the sleeve and yieldably urging said sleeve axially inwardly in response to rotational movement of said core relative to said sleeve, and control means for unloading said spring to cause expansion of the spring in response to rotational movement of the core relative to the sleeve in the cap-installation direction and for loading said spring to cause contraction of the spring in response to rotational movement of the core relative to the sleeve in an opposite direction, the control means including a handle cover and means for coupling the core to the handle cover for rotation therewith.

A cap engageable with a filler neck having a mouth, the cap comprising a core insertable into said neck,

• a sleeve about at least an axially outer portion of the core, the sleeve being axially movable relative to the core and carrying a sealing ring configured to engage the filler neck at its mouth upon insertion of the core and the sleeve in an axially inward direction into the filler neck, and
• means for gripping the filler neck to compress the sealing ring between the sleeve and the filler neck mouth so that a fuel vapor seal is established between the closing means and the filler neck in response to rotational movement of the core relative to the sleeve in a cap-installation direction, the gripping means including first engaging means for engaging said filler neck disposed on said sleeve to prevent rotation of said sleeve in said filler neck and to permit axial movement of said sleeve in said filler neck, second engaging means for engaging said filler neck to prevent axial outward movement of said cap from said filler neck when said core is rotated in the cap-installation direction, the second engaging means being disposed on said core, a spring acting between the core and the sleeve and yieldably urging said sleeve axially inwardly in response to rotational movement of said core in the cap-installation direction, and control means for releasing said spring in response to rotational movement of the core relative to the sleeve in the cap-installation direction and for loading said spring to cause contraction of the spring in response to rotational movement of the core relative to the sleeve in an opposite direction, the control means including a handle cover and means for coupling the core to the handle cover for rotation therewith.