| 摘要 |
<p>A coupling for interconnecting ventilation ductwork elements together. The coupling comprises an outer wall 5 defining a socket 2, 3 slideably receiving and supporting an end of a ductwork element therein and releasably connect said ductwork element to the coupling. The socket includes a slot 8, 9 and a seal member 12 to seal against the outer wall, the seal configured to resiliently deform and engage the ductwork element as the ductwork element is received in said socket to form a substantially airtight seal between the coupling and the ductwork element. The seal may comprise a primary (14, fig 4) and secondary (15) seal portion. The primary seal may be a flap and the secondary seal may be a domed or triangular shape. A retaining ring 13 may locate the seal in a seat 11. The ring may be formed of a resilient material snap-fit over an end of the socket. The inner wall may have a chamfered edge 6a to guide an element into the slot. A plurality of elements may be coupled together with a plurality of couplings. The coupling may be integral with the ductwork and may comprise bends or t-pieces.</p> |
