Assembly with two indexed parts

Abstract

In one exemplary implementation, an assembly may include two indexed parts. A first part may have a void formed therein and an axis, with the void defining at least one rotational stop and at least one radial stop. A second part may have a projection that is received at least partially in the void when the first and second parts are assembled together. The projection may have at least one rotational abutment surface adapted to engage said at least one rotational stop to limit relative rotation between the first and second parts, and the projection having at least one radial abutment surface adapted to engage said at least one radial stop to limit relative radial movement between the first and second parts in a direction away from the axis.

1 . A pumping assembly, comprising:
 a first body having a void formed therein and an axis, with the void defining at least one rotational stop and at least one radial stop;   a second body having a projection that is received at least partially in the void when the first and second parts are assembled together, the projection having at least one rotational abutment surface adapted to engage said at least one rotational stop to limit relative rotation between the first and second parts, and the projection having at least one radial abutment surface adapted to engage said at least one radial stop to limit relative radial movement between the first and second parts in a direction away from the axis; and   at least one pumping element disposed at least partially between the first and second bodies.   
     
     
         2 . The assembly of  claim 1  wherein said at least one radial stop includes a pair of side walls of the void that have at least a portion that converge as they extend away from said axis. 
     
     
         3 . The assembly of  claim 1  wherein said void defines a pair of opposed radial stops that are engaged by the projection to limit relative radial movement between the components in directions toward and away from the axis. 
     
     
         4 . The assembly of  claim 3  wherein the void includes a pair of sidewalls that define said at least one radial stop and also define said at least one rotational stop. 
     
     
         5 . The assembly of  claim 3  wherein the void includes an inside wall that defines a radial stop that limits relative radial movement between the components in directions toward the axis. 
     
     
         6 . The assembly of  claim 1  wherein said void defines a pair of rotational stops that are engaged by the projection to limit relative rotational movement between the components in both clockwise and counter-clockwise directions relative to the axis. 
     
     
         7 . The assembly of  claim 1  which also comprises a pumping channel defined at least in part between said at least one pumping element and at least one of the first body or the second body, the pumping channel having an inlet into which fuel enters the pumping channel at a first pressure and an outlet from which fuel exits the pumping channel at a second pressure that is higher than the first pressure, and wherein the void and projection are located circumferentially closer to the inlet than the outlet of the pumping channel. 
     
     
         8 . An assembly with two indexed parts, comprising:
 a first part having a void formed therein and an axis, with the void defining at least one rotational stop and at least one radial stop; and   a second part having a projection that is received at least partially in the void when the first and second parts are assembled together, the projection having at least one rotational abutment surface adapted to engage said at least one rotational stop to limit relative rotation between the first and second parts, and the projection having at least one radial abutment surface adapted to engage said at least one radial stop to limit relative radial movement between the first and second parts in a direction away from the axis.   
     
     
         9 . The assembly of  claim 8  wherein said at least one radial stop includes a pair of side walls of the void that have at least a portion that converge as they extend away from said axis. 
     
     
         10 . The assembly of  claim 8  wherein said void defines a pair of opposed radial stops that are engaged by the projection to limit relative radial movement between the components in directions toward and away from the axis. 
     
     
         11 . The assembly of  claim 10  wherein the void includes a pair of sidewalls that define said at least one radial stop and also define said at least one rotational stop. 
     
     
         12 . The assembly of  claim 10  wherein the void includes an inside wall that defines a radial stop that limits relative radial movement between the components in directions toward the axis. 
     
     
         13 . The assembly of  claim 8  wherein said void defines a pair of rotational stops that are engaged by the projection to limit relative rotational movement between the components in both clockwise and counter-clockwise directions relative to the axis. 
     
     
         14 . The assembly of  claim 9  wherein the side walls are of concave form. 
     
     
         15 . The assembly of  claim 8  wherein the side walls are of convex form. 
     
     
         16 . The assembly of  claim 8  wherein the side walls are in the form of a dovetail.