Fluid material applicator

Claim 1

Apparatus for coating the outside surface of a pipe or other cylindrical object or the inside surface of a fitting or other hollow cylindrical object with a predetermined quantity of fluid material for a predetermined distance from the end thereof comprising: a first body section having a first, enclosed chamber therein for containment and storage of said fluid material and a second, open-ended chamber at one end thereof; means in said first body section forming a first passageway interconnecting said first and second chambers to permit fluid communication therebetween; first one-way valve means positioned in said first passageway between said first and second chambers for permitting passage of said fluid material only from said first chamber to said second chamber; a second body section connected to and moveable relative to said first body section, said second body section having a third, open-ended chamber at one end thereof positioned facing said second open-ended chamber in said first body section, said second and third open-ended chambers cooperating to define an enclosed, compressible, metering chamber in selective fluid communication with said first chamber via said first passageway, said second body section further including means defining an annular area adapted to surround the end of a pipe or lie within the end of a fitting; means in said second body section forming a second passageway interconnecting said metering chamber and said annular area to permit fluid communication therebetween; said one-way valve means positioned in said second passageway between said metering chamber and said annular area for permitting passage of said fluid material only from said metering chamber to said annular area, said end of said pipe or said end of said fitting being adapted to engage said second body section and to move said second body section toward said first body section by a predetermined maximum amount, movement of said second body section toward said first body section by said predetermined amount compressing said metering chamber and pumping said predetermined quantity of fluid material through said second passageway, past said second one-way valve means, to said annular area; means positioned between said first and second body sections for urging said second body section away from said first body section whereby movement of said pipe or fitting out of engagement with said second body section causes movement of said second body section away from said first body section, expanding said metering chamber, and pumping said fluid material from said first chamber, through said first passageway, past said first one-way valve means, into said metering chamber to refill same; and means in said second body section responsive to movement of said pipe or fitting out of engagement with said second body section for uniformly distributing said pumped predetermined quantity of fluid material across said outside surface of said pipe or said inside surface of said fitting.