Head cover trimming system

Abstract

A head cover trimming system for trimming around a ground level head cover includes a head cap and a grass trimmer assembly. The head cap is provided on the head cover and includes a centering member. The grass trimmer assembly includes a head member having a peripheral edge portion along which is mounted a cutting element. The grass trimmer assembly is driven through a drive shaft connected to a rotary tool at one end. Arranged within the head member is a retractable centering shaft. When the head member is placed over the head cover, the centering shaft is received by the centering member to center the grass trimmer about the head cover. The centering shaft retracts into the head member to allow the rotating cutting element to trim the area around the head cover.

1 - 13 . (canceled)  
   
   
       14 . A head cap for use in connection with trimming about a substantially ground level head cover comprising: 
 a main body portion adapted to be fixed to a ground level head cover, said main body portion including a top surface; and    a centering member provided on the top surface of the main body portion, said centering member being adapted to engage with a centering shaft of a grass trimmer to center the grass trimmer over the head cover.    
   
   
       15 . The head cap according to  claim 14 , wherein the centering member is constituted by a recess provided along the top surface of the main body portion.  
   
   
       16 . The head cap according to  claim 14 , wherein the top surface of the main body portion includes a mounting plate recess for mounting an information plate.  
   
   
       17 . The head cap according to  claim 14 , wherein the centering member is constituted by a substantially cylindrical recess.  
   
   
       18 . The head cap according to  claim 17 , wherein the central recess includes an upper tapered portion extending to a cylindrical bore.  
   
   
       19 . The head cap according to  claim 18 , wherein the cylindrical bore leads to a terminal end portion.  
   
   
       20 - 21 . (canceled)  
   
   
       22 . A head cover trimming system for cutting grass around a substantially ground level sprinkler head comprising: 
 a sprinkler head including a housing having a buried body portion and a sprinkler head cover;    a head cap provided on the sprinkler head cover for use in connection with trimming about the sprinkler head cover, said head cap including: 
 a main body portion fixed to the sprinkler head cover, said main body portion including a top surface; and  
 a centering member provided on the top surface of the main body portion; and  
   a cutting head system including: 
 a head member having a peripheral edge portion interconnected to a central hub, said head member being sized to extend about the sprinkler head cover;  
 a cutting element projecting from the peripheral edge portion of the head member;  
 a drive shaft member having a driven end portion extending to a driving end portion, said driving end portion being drivingly connected to the head member; and  
 a centering element extending within the head member and projecting beyond the cutting element, said centering element being adapted to engage with the centering member of the head cap to center the head member about the sprinkler head cover such that, upon application of a driving force to the driven end portion of the drive shaft, the head member rotates about the sprinkler head cover causing the cutting element to trim around the sprinkler head cover.  
   
   
   
       23 . The head cover trimming system according to  claim 22 , wherein the cutting head further includes a spring member, said centering element being retractably mounted within the head member, with the spring member biasing the centering element outward from the head member and into engagement with the head cap.