Ventilation pipe cap

Abstract

A ventilation-pipe cap has a cap sleeve (1) with an internal periphery having a cap fastener which fastens predeterminedly to an external periphery of a ventilation pipe (2) and has a plurality of ventilation orifices (4) sized and arranged intermediate the cap fastener and a cap apex (3) for preventing entry of debris and life forms into the ventilation pipe predeterminedly.

What is claimed is:  
     
         1 . A ventilation-pipe cap comprising: 
 a cap sleeve having an internal periphery that is circumferential;    the cap sleeve including a cap fastener for fastening the cap sleeve to a ventilation pipe predeterminedly;    a cap apex predeterminedly above and proximate an axis of the cap sleeve; and    a plurality of ventilation orifices sized and arranged intermediate the cap fastener and the cap apex for keeping debris and life forms from entering the ventilation pipe without diminishing ventilating capacity of the ventilation pipe.    
     
     
         2 . The ventilation-pipe cap of  claim 1  wherein: 
 the cap fastener includes a circumferential internal periphery of the cap sleeve that fits predeterminedly snug on an external periphery of the ventilation pipe.  
 
     
     
         3 . The ventilation-pipe cap of  claim 1  wherein: 
 the cap sleeve includes a pipe-receptacle section with a step wall for receiving the ventilation cap within the inside periphery of the pipe-receptacle section and for resting the ventilation-pipe cap on the ventilation pipe.  
 
     
     
         4 . The ventilation-pipe cap of  claim 1  wherein: 
 the cap fastener includes a circumferential internal periphery of the cap sleeve that has a predeterminedly fastening taper outward radially from the axis of the cap sleeve for a push-on fit of the internal periphery of the cap sleeve onto the external periphery of the ventilation pipe.  
 
     
     
         5 . The ventilation-pipe cap of  claim 1  wherein: 
 the cap fastener includes an adherent that is applied intermediate the internal periphery of the cap sleeve and the external periphery of the ventilation pipe.  
 
     
     
         6 . The ventilation-pipe cap of  claim 4  wherein: 
 the adherent includes lead.  
 
     
     
         7 . The ventilation-pipe cap of  claim 1  wherein: 
 the cap fastener includes a fastener sleeve having a circumferential inside periphery that fits predeterminedly onto the external periphery of the ventilation pipe;  
 the fastener sleeve includes an external periphery having ventilation-pipe threading;  
 the internal periphery of the cap sleeve includes fastener-sleeve threading that matches the ventilation-pipe threading.  
 
     
     
         8 . The ventilation-pipe cap of  claim 7  wherein: 
 the ventilation-pipe threading and the fastener-sleeve threading are tapered pipe threading.  
 
     
     
         9 . The ventilation-pipe cap of  claim 7  wherein: 
 the ventilation-pipe threading and the fastener-sleeve threading are straight threading.  
 
     
     
         10 . The ventilation-pipe cap of  claim 1  wherein: 
 the cap fastener includes a quick-disconnect pin extended radially from the fastener sleeve into a linear inlet to receive the quick-disconnect pin;  
 the linear inlet terminating in a circumferential channel intermediate the linear inlet and a lock bay; and  
 the lock bay receives the quick-disconnect pin in a locked mode.  
 
     
     
         11 . The ventilation-pipe cap of  claim 1  wherein: 
 the cap apex includes an arcuate dome that is domed upward predeterminedly proximate the axis of the cap sleeve.  
 
     
     
         12 . The ventilation-pipe cap of  claim 11  wherein: 
 the arcuate dome includes the ventilation orifices in fluid communication intermediate an outside periphery and an inside periphery of the arcuate dome;  
 the ventilation orifices are predeterminedly sized to prevent entry of predetermined debris and life forms.  
 
     
     
         13 . The ventilation-pipe cap of  claim 1  wherein: 
 the cap apex includes a perch-prevention point that is pointed upward predeterminedly proximate the axis of the cap sleeve.  
 
     
     
         14 . The ventilation-pipe cap of  claim 13  wherein: 
 the perch-prevention point includes the ventilation orifices in fluid communication intermediate an outside periphery and an inside periphery of the perch-prevention point;  
 the ventilation orifices are predeterminedly sized to prevent entry of predetermined debris and life forms; and  
 the perch-prevention point is predeterminedly sharp and steep to prevent perching of birds thereon.  
 
     
     
         15 . The ventilation-pipe cap of  claim 1  wherein: 
 the cap sleeve includes an apex-riser section intermediate the cap apex and a cap-fastener section of the cap sleeve.  
 
     
     
         16 . The ventilation-pipe cap of  claim 15  wherein: 
 the apex-riser section includes the ventilation orifices in fluid communication intermediate an outside periphery and an inside periphery of the apex-riser section; and  
 the ventilation orifices are predeterminedly sized to prevent entry of predetermined debris and life forms.  
 
     
     
         17 . A ventilation-pipe cap comprising: 
 a cap sleeve having an internal periphery that is circumferential;    the cap sleeve having a cap fastener for fastening the cap sleeve to a ventilation pipe predeterminedly;    a cap apex predeterminedly above and proximate an axis of the cap sleeve;    the cap sleeve including an apex-riser section intermediate the cap apex and the cap fastener; and    a plurality of ventilation orifices arranged predeterminedly intermediate the cap fastener and the cap apex.    
     
     
         18 . The ventilation-pipe cap of  claim 17  wherein: 
 the cap apex includes an arcuate dome vertically above the apex riser section with the arcuate dome predeterminedly proximate the axis of the cap sleeve.  
 
     
     
         19 . The ventilation-pipe cap of  claim 17  wherein: 
 the arcuate dome includes the ventilation orifices in fluid communication intermediate an outside periphery and an inside periphery of the arcuate dome;  
 the ventilation orifices are predeterminedly sized to prevent entry of predetermined debris and life forms.  
 
     
     
         20 . The ventilation-pipe cap of  claim 17  wherein: 
 the cap apex includes a perch-prevention point that is pointed upwardly above the apex riser with the perch-prevention point predeterminedly proximate the axis of the cap sleeve.  
 
     
     
         21 . The ventilation-pipe cap of  claim 20  wherein: 
 the perch-prevention point includes the ventilation orifices in fluid communication intermediate an outside periphery and an inside periphery of the perch-prevention point;  
 the ventilation orifices are predeterminedly sized to prevent entry of predetermined debris and life forms; and  
 the perch-prevention point is predeterminedly sharp and steep to prevent perching and consequential defecation of birds thereon.