Charge forming device with tamper resistant adjustable valve
AssigneeWalbro Corporation
InventorsMatthew A. Braun, Eric L. King
Life of this patent
Estimating the term…
Abstract
In at least some implementations, a locking plate may be received between the cover plate and the adjustable valve and be movable to a first position permitting access to the adjustable valve and a second position inhibiting or preventing access to the adjustable valve. In some implementations, a latch assembly may releasably retain the locking plate in its second position. The latch assembly may include a finger carried by the locking plate and releasably engageable with a stop when the locking plate is in its second position.
Claims20
A carburetor, comprising:
- a body having a needle valve passage and a cavity open to the needle valve passage;
- an adjustable valve having a head received in the cavity and a shank at least partly received in the needle valve passage;
- a cover plate that is secured to the carburetor body over at least part of the cavity and which has a valve access hole therethrough;
- and
- a disk received within the cavity between the body and the cover plate, the disk has an opening therethrough and the disk is rotatable between an open position and a closed position, the disk has a latch that engages at least one of the cover plate and the body in the closed position to inhibit of prevent rotation of the disk relative to the cover plate, and the latch is moveable relative to the cover plate to permit rotation of the disk from the closed position to the open position, wherein the opening and the valve access hole are at least partly aligned when the disk is in the open position permitting access to the adjustable valve through the valve access hole and opening, and wherein the opening and valve access hole are not aligned when the disk is in the closed position to inhibit or prevent access to the adjustable valve through the cover plate and disk.
A tool for releasing a latch of a locking plate carried by a carburetor body having at least one adjustable valve received in a cavity of the carburetor body, a cover overlying at least part of the cavity and having a hole through which access to the valve for adjusting it may be obtained and a locking plate overlying the adjustable valve and received between the adjustable valve and the cover and movable from a first position permitting access to the adjustable valve to a second position inhibiting or preventing access to the adjustable valve, the tool comprising:
- a driver having a non-circular portion insertable through a hole in the cover plate and into a complimentary receiver in the locking plate for rotation of the driver to move the locking plate from its second position toward its first position;
- and
- at least one finger insertable through an access hole in the cover plate and movable to release the latch so that the locking plate may be moved from its second position toward its first position.
Dependencies are inferred from the claim text.