US 2007/0163727 A1Published application

Window Blinds with Gears

AssigneeZipshade Industrial (B.V.I.) Corp.

InventorsLi-Ming Cheng, Kuei-Lin Tsai

Life of this patent

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Abstract

A window covering system with geared interconnecting mechanism for raising and lowering window shade cordlessly. The window covering system may have at least one lifting cord, at least one connecting cord, an elongated member having a channel, and window covering member which may be a shade, a blind, or other known window covering designs. The contemplated device has at least one spring-actuated rotary element coupled to a spring and having a spool capable of winding and storing at least one connecting cord. The rotary elements are interconnected with gears for precision rotation, and are contained within a receptacle detachably received within the channel of the elongated member. This window covering system may optionally include a rotor set having rotors optionally interconnected by gears.

Claims19

Dependent claims

A window covering system comprising:

a first lifting cord;
a first connecting cord;
an elongated member having a channel;
a window covering member having an area of coverage, the window covering member is coupled to the elongated member;
a rotor set disposed within the channel, the rotor set having a first rotor and a second rotor;
an output drum attached to a proximal end of the first connecting cord, and stores a portion of the first connecting cord, said output drum is coupled to a first spring which biases the output drum to wind the first connecting cord in a winding direction;
wherein when said connecting cord moves, said first rotor also rotates;
wherein a proximal end of the first lifting cord is attached to said second rotor, and the first rotor is coupled to said second rotor such that when the first rotor rotates, the second rotor also rotates to wind and store a portion of the first lifting cord, the rotation of said second rotor causes the area of coverage to change in size.

5 more elements

Dependencies are inferred from the claim text.

Facts

Application: 11/687,590Filed 16 Mar 2007
Priority: 10 Feb 2003
Published: 19 Jul 2007
Term ends: Not estimatedThe source records don’t support an estimate.

Classification3 codes

E06B 9/30
With horizontal lamellae, e.g. non-liftable: liftable
E06B 9/62
Operating, guiding or securing devices or arrangements for roll-type closures; Spring drums; Tape drums; Counterweighting arrangements therefor:…
E06B
Fixed or movable closures for openings in buildings, vehicles, fences or like

Family

Application10/360,305Continuation in part · filed 10 Feb 2003
Application10/623,776Continuation in part · filed 21 Jul 2003
Application10/743,178Continuation in part · filed 23 Dec 2003
Application11/090,590Continuation in part · filed 28 Mar 2005
Application11/687,590Continuation in part · filed 16 Mar 2007
US 2004/0154758 A1Published application
US 2004/0231803 A1Published application
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US 2007/0163727 A1This patent

From the US filing history. Foreign family members aren’t listed.