| 摘要 |
2089066 9202311 PCTABS00010 A coupler is provided for connecting a vehicle exhaust pipe to an exhaust extractor hose. The coupler (30, 114) has a housing (32, 116) with an inlet end (34, 124) and an outlet end (36, 118). A curtain wall assembly (68, 122) is provided at the inlet end to sealingly receive the exhaust pipe. The curtain wall assembly comprises at least a pair of facially abutting curtain wall members (70, 126) defining adjacent mutually offset flexible flap members (78, 140) that deflect and seal around the exhaust pipe. A peripheral clamping ring (80, 128) clamps the curtain wall members together. The housing is provided with air passageway holes (52, 145) and a slider member (56, 144) having air passage holes (58, 146) which is slidable on the housing to bring the holes (58, 146) into or out of registry with the holes (52, 145) to increase or decrease airflow through the holes (52, 145).
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