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US 7,077,387 B1Granted
Limited access adjustment system for an internal combustion engine
AssigneeBrunswick Corporation
InventorsBrian R. White, Frank A. Robinson
Life of this patent
Estimating the term…
Abstract
An adjustment system for a carburetor of an engine places a housing structure around the head of an adjustment screw to inhibit access to the head of the idle fuel adjustment screw except by properly trained technicians who possess an appropriately shaped tool which allows this access. In this way, the housing can function as intended, to limit access by untrained personnel to the idle fuel adjustment screw, while not requiring that it be completely removed or destroyed in order to allow appropriate access by trained personnel.
Claims18
An adjustment system for an engine, comprising:
- an engine component;
- a rotatable adjustment member shaped to be supported by said engine component for rotation about a rotational axis, said rotatable adjustment member having a first end which is insertable into a retention opening formed in said engine component, said rotatable adjustment member having a second end extending away from said engine component;
- a head formed at said second end of said rotatable adjustment member;
- a housing having walls which are shaped to at least partially surround said head, said rotational axis of said rotatable adjustment member extending through a first surface of said housing, said first surface extending perpendicularly from an internal surface surrounded by said housing walls;
- an access opening formed in said first surface, said rotational axis of said rotatable adjustment member extending through said access opening;
- and
- an adjustment tool shaped to pass at least partially through said access opening, said adjustment tool having an operative end which is shaped to engage said head in torque transmitting relation, said operative end having a pair of inwardly facing surfaces which are shaped to receive a pair of outwardly facing surfaces of said head therebetween.
4 more elements
An adjustment system for an engine, comprising:
- a carburetor;
- an idle fuel mixture screw shaped to be supported by said carburetor for rotation about a rotational axis, said idle fuel mixture screw having a first end which is insertable into a retention opening formed in said carburetor, said idle fuel mixture screw having a second end extending away from said carburetor;
- a head formed at said second end of said idle fuel mixture screw;
- a housing having walls which are shaped to at least partially surround said head, said rotational axis of said idle fuel mixture screw extending through a first surface of said housing, said first surface extending perpendicularly from an internal surface surrounded by said housing walls;
- an access opening formed in said first surface, said rotational axis of said idle fuel mixture screw extending through said access opening;
- and
- an adjustment tool shaped to pass at least partially through said access opening, said adjustment tool having an operative end which is shaped to engage said head in torque transmitting relation, said operative end having a pair of inwardly facing planar surfaces which are shaped to receive a pair of outwardly facing planar surfaces of said head therebetween.
4 more elements
An adjustment system for an engine, comprising:
- a carburetor;
- an idle fuel mixture screw shaped to be supported by said carburetor for rotation about a rotational axis, said idle fuel mixture screw having a first end which is insertable into a retention opening formed in said carburetor, said idle fuel mixture screw having a second end extending away from said carburetor;
- a head formed at said second end of said idle fuel mixture screw;
- a housing having walls which are shaped to at least partially surround said head, said rotational axis of said idle fuel mixture screw extending through a first surface of said housing, said first surface extending perpendicularly from an internal surface surrounded by said housing walls;
- an access opening formed in said first surface, said rotational axis of said idle fuel mixture screw extending through said access opening;
- and
- an adjustment tool shaped to pass at least partially through said access opening, said adjustment tool having an operative end which is shaped to engage said head in torque transmitting relation, said operative end having a pair of inwardly facing surfaces which are shaped to receive a pair of outwardly facing surfaces of said head therebetween.
4 more elements
Dependencies are inferred from the claim text.