Window treatment safety clutch
First Claim
Patent Images
1. A window treatment comprising:
- a headrail adapted to be secured to a window frame;
a bottomrail;
a tube lift cord spool rotatably attached to the headrail;
a lift cord having one end attached to the bottomrail and an opposite end secured to the tube lift cord spool so as to be wound and unwound about the tube lift cord spool;
a window covering material disposed between the bottomrail and the headrail, the window covering material having an end attached to the bottomrail and movable therewith;
a brake mechanism connected to the headrail and positioned to engage the tube lift cord spool for preventing rotation of the tube lift cord spool; and
a safety clutch attached to a movable frame is operably connected to the headrail wherein the movable frame can be moved to a first position in which the safety clutch is rotatably engaged with the tube lift cord spool in an operating position to raise the lift cord and bottomrail and can be moved to a second position in which the safety clutch is disengaged from the tube lift cord spool.
1 Assignment
0 Petitions
Accused Products
Abstract
A safety clutch is provided for operating a window treatment having a headrail, a bottomrail and a window covering material extending therebetween. The safety clutch is mounted on a movable frame within the headrail and is moved to rotatably engage the tube lift cord spool on which lift cords are wound and unwound to raise and lower the bottomrail. A brake mechanism connected to the headrail prevents rotating of the tube lift cord spool, and the brake is automatically disengaged upon operation of the safety clutch. A single pull cord is used to operate the safety clutch and the pull cord is maintained in a raised location when not in use.
-
Citations
17 Claims
-
1. A window treatment comprising:
-
a headrail adapted to be secured to a window frame; a bottomrail; a tube lift cord spool rotatably attached to the headrail; a lift cord having one end attached to the bottomrail and an opposite end secured to the tube lift cord spool so as to be wound and unwound about the tube lift cord spool; a window covering material disposed between the bottomrail and the headrail, the window covering material having an end attached to the bottomrail and movable therewith; a brake mechanism connected to the headrail and positioned to engage the tube lift cord spool for preventing rotation of the tube lift cord spool; and a safety clutch attached to a movable frame is operably connected to the headrail wherein the movable frame can be moved to a first position in which the safety clutch is rotatably engaged with the tube lift cord spool in an operating position to raise the lift cord and bottomrail and can be moved to a second position in which the safety clutch is disengaged from the tube lift cord spool. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
-
-
10. A safety clutch for a window treatment of the type having a pull cord for raising and lowering the window treatment, the safety clutch comprising:
-
a pull cord drum for winding and unwinding the pull cord; a brake mechanism positioned to engage the pull cord drum for preventing rotation of the pull cord drum; a pull cord spool adapted to rotatably engage the pull cord drum, the pull cord spool being mounted in such a manner that the pull cord spool can be moved to a first position in which the pull cord spool is rotatably engaged with the pull cord drum in an operating position to raise the window treatment and can be moved to a second position in which the pull cord spool is disengaged from the pull cord drum; a spring connected to the pull cord spool, the spring urging the pull cord spool to rotate in a first direction; and a clutch pull cord wound around the pull cord spool such that as the clutch pull cord is unwound the spring is placed in tension and releasing the clutch pull cord will allow the spring to rotate the pull cord spool causing the clutch pull cord to rewind on the pull cord spool. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17)
-
Specification