Double-jet acting trap primer
AssigneeWatts Regulator Co.
InventorsLouis M. Miller, Rand H. Ackroyd
Life of this patent
Estimating the term…
Abstract
A flow-through or in line type trap primer adapted to deliver a first metered spurt of water through a primer flow passage to a trap upon the initiation of flow in a supply line, and a second metered spurt of water upon the termination of such flow. A reaction disc in the main flow passage causes a stem to translate between two positions, and means cooperating with the stem cause the primer flow passage to be closed at said two positions and open as the stem moves between said positions. Manual as well as automatic priming is provided for.
Claims12
A trap primer having, in combination,
- a body forming a main flow passage with a partition separating inlet and outlet chambers therein respectively adapted for connection to a supply line and fixture, the partition having an aperture, the body having a primer flow passage for connection to a trap and communicating with the inlet chamber through a valve seat,
- a stem having a trap disc and a reaction disc and movable to a position in which the trap disc closes the valve seat with the reaction disc located with annular clearance substantially in the aperture, the stem being extended through the valve seat in the direction of the trap by a first portion of reduced diameter and a second portion of relatively larger diameter,
- and annular sealing means in the primer flow passage, said first portion having clearance with the sealing means in said position and said second portion entering through and in annular sealing relation to said sealing means upon movement of the stem to and beyond a predetermined distance from said position.
A trap primer for connection in a supply line to a fixture having, in combination,
- a body forming a main flow passage with a partition separating inlet and outlet chambers therein respectively adapted for connection to the supply and fixture, the partition having an aperture, the body having a primer flow passage for connection to a trap and communicating with the inlet chamber through a valve seat,
- a stem extending through the aperture and valve seat and having a trap disc for closing the valve seat and sealing means for closing the primer flow passage at a position downstream of the valve seat when the trap disc has moved a predetermined distance from the valve seat,
- means threaded in the body and manually rotatable to lift the trap disc from the valve seat,
- means for resiliently urging the stem in a direction to close the valve seat, and
- a reaction disc on the stem substantially in the aperture when the valve seat is closed and adapted for moving said predetermined distance into the outlet chamber in response to a pressure differential between the inlet and outlet chambers.
Dependencies are inferred from the claim text.