초록 ▼

A dual plate check valve has flaps (6) mounted on one or more hinge pins (7). The ends of the hinge pins (7) are received in sockets in inserts (12), which inserts (12) are receivable in open-sided recesses (13) formed in the annular valve housing (1) and are held in place by a keeper (14) located i

A dual plate check valve has flaps (6) mounted on one or more hinge pins (7). The ends of the hinge pins (7) are received in sockets in inserts (12), which inserts (12) are receivable in open-sided recesses (13) formed in the annular valve housing (1) and are held in place by a keeper (14) located in a generally radially outwardly extending slot (15) formed in that housing (1). Where a single hinge pin (7) is used in a vertical orientation to support both flaps (6), a cylindrical bearing member may be supported by a lower one of said inserts (12) to extend through a lower hinge lug (21) of the first flap and partially through a lower hinge lug (20) of the second flap, thereby to support the lower hinge lug of the second flap independently of the first flap.

대표청구항 ▼

[ I claim:] [1.] A dual plate check valve comprising an annular housing and two closing flaps effective to close a passage through the housing, the flaps being mounted on at least one hinge pin, said at least one hinge pin extending at each end into a socket in an insert, the inserts being received

[ I claim:] [1.] A dual plate check valve comprising an annular housing and two closing flaps effective to close a passage through the housing, the flaps being mounted on at least one hinge pin, said at least one hinge pin extending at each end into a socket in an insert, the inserts being received in respective open sided recesses in the annular housing wherein each said insert is retained in a said recess by means of a keeper plate located in a generally radially outwardly extending slot formed in said annular housing, and wherein each said keeper plate is retained in said radial slot by means of retaining screws, dowels, pins, pegs or clips located in bores in said annular housing and extending through corresponding bores formed in said keeper plate.