Back to results
US 4,901,700 AGranted
Clamp for an internal combustion engine fuel injector
AssigneePerkins Engines Group Limited
InventorsMichael Knight, Ronald G. Moore
Life of this patent
Estimating the term…
Loading patent…
Loading patent…
AssigneePerkins Engines Group Limited
InventorsMichael Knight, Ronald G. Moore
Estimating the term…
A fuel injector clamp takes the form of a generally oval-shaped ring manufactured from pipe so that the side walls on the minor axis enclose flats on opposite sides of the injector body and the end walls on the major axis each encircle a respective fixing bolt. The end walls encircle more than 180 degrees of the circumference of the bolt. The side walls adjacent each end are pinched inwards towards one another, but are not fully brought together. Encirclement of the fixing bolts in this way serves to increase the contact area between the botls and clamp to ensure improved clamping, and also produces an inherent resistance to spreading of hte side walls. The lower edges of the side walls are each formed with a pair of indentation so that the portion therebetween is arcuate and forms a point contact with a respective bearing shoulder on the injector body. These identations are formed by deformation of the edges of the side wall so as to avoid machining. Thus a tiltable clamp can be provided in a simple manner from a uniform width of pipe without involving any material waste.
A fuel injector clamp adapted to be secured by a pair of fixing bolts to a head of an engine so as to hold a fuel injector in place by enclosing flats on opposite sides of a body of an injector and engaging bearing shoulders alongside each flat, said clamp being in the form of a generally oval-shaped ring manufactured from pipe having a longitudinal axis and major and minor axes lying in a plane perpendicular to said longitudinal axis, the ring having side walls on the minor axis adapted to enclose flats on opposite sides of the injector body, a lower edge adapted to engage a bearing shoulder on the injector body alongside each flat, and end walls on the major axis each adapted to surround a respective fixing bolt and extend around the circumference of a circle over more than 180 degrees.
A fuel injector clamp adapted to be secured by a pair of fixing bolts to a head of an engine so as to hold a fuel injector in place by enclosing flats on opposite side of a body of an injector and engaging bearing shoulders alongside each flat, said clamp being in the form of a generally oval-shaped ring manufactured from pipe having a longitudinal axis and major and minor axes lying in a plane perpendicular to said longitudinal axis, the ring having side walls on the minor axis adapted to enclose flats on opposite sides of the injector body, end walls of the major axis each adapted to surround a respective fixing bolt, and a lower edge adapted to engage a bearing shoulder on the injector body alongside each flat, the lower edge lying in a plane perpendicular to said longitudinal axis and having a portion along each side wall formed with a pair of indentations so that the edge between said indentations is arcuate and touches said plane, thereby to form a point contact with a respective bearing shoulder on the injector body.
Dependencies are inferred from the claim text.