# US 9,038,315 B2 · Self-balancing double-hung window apparatus

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- Number: US 9,038,315 B2
- Document ID: US9038315B2
- Status: Granted
- Kind: B2
- Application number: 14/350,296
- Filed: 2012-10-04
- Published: 2014-08-21
- Granted: 2015-05-26
- Earliest claimed: 2011-10-05
- Assignees: Caldwell Manufacturing Company North America, LLC
- Applicants: Caldwell Manufacturing Company North America, LLC
- Inventors: Wilbur James Kellum, III
- Web page: https://patentgrep.com/patent/US9038315B2

## CPC

- E05D 13/10: {Counterbalance devices}
- E05D 13/06: {with notches for vertically sliding wings}
- E05D 15/22: allowing an additional movement {(E05D15/20 takes precedence)}
- E06B 3/4415: {Double-hung, i.e. with two vertical sliding panels}
- E05D 15/18: consisting of two or more independent parts, movable each in its own guides
- E05Y 2600/10: Adjustable
- E05Y 2900/148: Windows
- E05D: HINGES OR SUSPENSION DEVICES FOR DOORS, WINDOWS OR WINGS (pivotal connections in general F16C11/00)
- E06B: FIXED OR MOVABLE CLOSURES FOR OPENINGS IN BUILDINGS, VEHICLES, FENCES OR LIKE ENCLOSURES IN GENERAL, e.g. DOORS, WINDOWS, BLINDS, GATES (shades or blinds for greenhouses A01G9/22; curtains A47H; lids for car boots or bonnets B62D25/10; skylights E04B7/18; sunshades, awnings E04F10/00)
- E05Y: INDEXING SCHEME ASSOCIATED WITH SUBCLASSES E05D AND E05F, RELATING TO CONSTRUCTION ELEMENTS, ELECTRIC CONTROL, POWER SUPPLY, POWER SIGNAL OR TRANSMISSION, USER INTERFACES, MOUNTING OR COUPLING, DETAILS, ACCESSORIES, AUXILIARY OPERATIONS NOT OTHERWISE PROVIDED FOR, APPLICATION THEREOF

## Abstract

A mechanism is provided for balancing and positioning a sash of a self-balancing double-hung window assembly. The mechanism may include a fixed length cable, a pulley, first and second brackets and an adjustment member. The fixed length cable may include first and second ends. The pulley may support the cable. The first bracket may include one or more attachment points relative to the first end of the cable and may include an upper end and a lower end. The second bracket may be movable relative to the first bracket and may be configured to support the sash. The adjustment member may engage and extend through the lower end of the first bracket and may be movable relative to the first bracket to cause corresponding movement of the second bracket relative to the first end of the cable.

## Claims

### Claim 1

A mechanism for balancing and positioning a sash of a double hung window assembly within the window jamb of a window frame, the mechanism comprising:
a fixed length cable having first and second ends;
a pulley supporting the cable, the pulley rotatably mounted in a housing, the housing comprising a rib member protruding from a surface of the housing inward toward the sash and extending in a direction substantially parallel to the window jamb to align with a divider wall of the window jamb;
a first bracket attached to the first end of the cable and including an upper end and a lower end;
a second bracket movable relative to the first bracket and configured to support the sash; and
an adjustment member engaging the first bracket and being movable relative to the first bracket to cause corresponding movement of the second bracket relative to the first end of the cable;
wherein the second bracket includes first and second members, the first member being configured to support the sash, the second member being fixed relative to the first member; and
wherein the first member slidably engages the first bracket.

### Claim 2 (depends on 1)

The mechanism of claim 1, wherein the first bracket includes a post that slidably engages the first member.

### Claim 3

An apparatus for vertically positioning first and second sashes of a window assembly within the window jamb of a window frame, the apparatus comprising:
a cable having a first end supporting the first sash and a second end supporting the second sash;
a pulley supporting the cable;
a housing supporting the pulley for rotation relative to the housing, the housing including a body portion and a vertically extending rib member projecting outward from the body portion, the rib member aligning with a portion of the window jamb to form a substantially continuous jamb wall;
a first bracket attached to the first end of the cable and including an upper end and a lower end;
a second bracket movable relative to the first bracket and configured to support the first sash; and
an adjustment member engaging and extending through the lower end of the first bracket and being movable relative to the first bracket to cause corresponding movement of the second bracket relative to the first end of the cable;
wherein the second bracket includes first and second members, the first member being configured to support the sash, the second member being fixed relative to the first member; and
wherein the first member slidably engages the first bracket.

### Claim 4 (depends on 3)

The apparatus of claim 3, wherein the first bracket includes a post that slidably engages the first member.

### Claim 5

A self-balanced double-hung window assembly comprising:
a window frame including a dividing member defining a first jamb channel and a second jamb channel;
a first sash movable within the first jamb channel;
a second sash movable within the second jamb channel;
a cable having a first end supporting the first sash and a second end supporting the second sash;
a pulley supporting the cable; and
a housing at least partially disposed within the first and second jamb channels and supporting the pulley for rotation relative to the housing such that rotation of the pulley in a first rotational direction causes corresponding movement of the first sash in a first linear direction and corresponding movement of the second sash in a second linear direction, the housing including a body portion and a rib member extending in a vertical direction substantially parallel to the first and second jamb channels, the rib member being aligned with and abutting the dividing member separating the first and second jamb channels;
a first bracket attached to the first end of the cable;
a second bracket movable relative to the first bracket;
wherein the second bracket includes first and second members, the first member being configured to support one of the first and second sashes, the second member being fixed relative to the first member; and
wherein the first member slidably engages the first bracket.

### Claim 6 (depends on 5)

The assembly of claim 5, wherein the first bracket includes a post that slidably engages the first member.