Bath Vent Roof Cap

Abstract

A multi-piece vent cap assembly includes a bottom housing and a top housing which can be removeably engaged to the bottom housing. The bottom housing includes a flange and a vertical shaft, which defines an air passage for mounting over an exhaust pipe of a building. The top housing includes a cover and a connection ring. The connection ring is configured for removable engagement to the shaft of the bottom housing.

What is claimed is: 
     
         1 . A multi-piece vent cap assembly comprising:
 a bottom housing, the bottom housing having a flange and a shaft extending upward from the flange, the shaft defining an air flow passage that extends vertically through the shaft, the bottom housing configured to be mounted over an exhaust pipe of a building;   a top housing, the top housing having a cover and a connection ring, the cover configured to mechanically engage the connection ring, the cover defining an air flow cavity, the connection ring configured to be removeably engaged to the shaft of the bottom housing.   
     
     
         2 . The assembly of  claim 1  further comprising a connector, the connector configured for insertion into the shaft airflow passage, the connector configured to connect to the exhaust pipe of the building. 
     
     
         3 . The assembly of  claim 2  wherein the shaft defines a lip within the air flow passage and the connector comprises a collar, the collar constructed and arranged to engage the lip when the connector is inserted into the air flow passage. 
     
     
         4 . The assembly of  claim 3  wherein the connector has a bottom and a diameter, the diameter of the connector being greater at the collar than at the bottom of the connector. 
     
     
         5 . The assembly of  claim 4  wherein the diameter of the connector tapers from a greater diameter at the collar to a smaller diameter at the bottom. 
     
     
         6 . The assembly of  claim 1  wherein the top housing further comprises a damper, the damper configured to be pivotally engaged to the connection ring, the damper sized to cover the air flow passage of the shaft. 
     
     
         7 . The assembly of  claim 1  wherein the top housing further comprises a pest screen, the pest screen configured to mechanically engage a surface of the cover within the air flow cavity. 
     
     
         8 . The assembly of  claim 1  wherein the connection ring of the top housing defines a plurality of slots and the shaft of the bottom housing comprises a plurality of tabs, each slot is configured to receive and frictionally engage a tab. 
     
     
         9 . The assembly of  claim 1  wherein the cover has a dome shape. 
     
     
         10 . A multi-piece vent cap assembly comprising:
 a bottom housing having a flange and a shaft extending upward from the flange, the shaft defining an air flow passage that extends vertically through the shaft, the bottom housing configured to be mounted over an exhaust pipe of a building;   a top housing, the top housing having a cover, a connection ring, a damper, and a pest screen, the cover being mechanically engaged to the connection ring, the cover defining an air flow cavity, the connection ring being removeably engaged to the shaft of the bottom housing, the damper being pivotally engaged to the connection ring and sized to cover the air flow passage, the pest screen being mechanically engaged to a surface of the cover within the air flow cavity; and   a connector, the connector positioned within the air flow passage of the shaft, the connector configured to connect to the exhaust pipe of the building.