초록 ▼

An improved retractable covering for an architectural opening includes an improved mounting bracket, an improved limit stop to prevent over-retraction and over-extension of the retractable covering, an improved battery pack mounting bracket for attaching a power supply to a head rail of the retracta

An improved retractable covering for an architectural opening includes an improved mounting bracket, an improved limit stop to prevent over-retraction and over-extension of the retractable covering, an improved battery pack mounting bracket for attaching a power supply to a head rail of the retractable covering, an improved battery pack mounting apparatus for attaching a battery pack to a head rail, an improved control system for the retractable covering, and an improved method of using a wireless remote control or a manually operated switch to activate a motor to control the configuration of the covering, including the extension or retraction of the covering, and the transmissivity of the covering. The disclosed improvements are field retrofittable.

대표청구항 ▼

An improved retractable covering for an architectural opening includes an improved mounting bracket, an improved limit stop to prevent over-retraction and over-extension of the retractable covering, an improved battery pack mounting bracket for attaching a power supply to a head rail of the retracta

An improved retractable covering for an architectural opening includes an improved mounting bracket, an improved limit stop to prevent over-retraction and over-extension of the retractable covering, an improved battery pack mounting bracket for attaching a power supply to a head rail of the retractable covering, an improved battery pack mounting apparatus for attaching a battery pack to a head rail, an improved control system for the retractable covering, and an improved method of using a wireless remote control or a manually operated switch to activate a motor to control the configuration of the covering, including the extension or retraction of the covering, and the transmissivity of the covering. The disclosed improvements are field retrofittable. , a pressure responsive shutoff valve in said passageway including a valve seat coaxial with said axis and facing said upstream end of said passageway and a valve plate on the upstream side of said valve seat, an annular recess surrounding said seat and facing upstream of said passageway, said recess having an outer diameter, said valve plate having arcuate opposite ends spaced apart a distance greater than said diameter and linear side edges between said ends and parallel and spaced apart a distance less than said diameter, and said valve plate having a first position spaced from said valve seat and a second position engaging said valve seat to close said passageway in response to a pressure differential across said shutoff valve of no more than 15 psi. 38. A coupling according to claim 37, wherein said valve plate is stainless steel. 39. A coupling according to claim 37, wh