# US 4,400,027 A · Recessed window lock

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- Number: US 4,400,027 A
- Document ID: US4400027A
- Status: Granted
- Kind: A
- Application number: 06/230,888
- Filed: 1981-02-02
- Granted: 1983-08-23
- Earliest claimed: 1981-02-02
- Inventors: Abraham S. Nahon
- Web page: https://patentgrep.com/patent/US4400027A

## CPC

- E05B 65/0864: {the bolts sliding perpendicular to the wings}
- Y10S 292/47: Sash fasteners
- Y10T 292/34: Portable
- E05B: LOCKS; ACCESSORIES THEREFOR; HANDCUFFS
- Y10S: TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10T: TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION

## Abstract

The window lock includes in combination a cylindrical barrel suitable for recessed installation and a special key for insertion and removal of the barrel from a window sash. The cylindrical barrel is fabricated of suitable length to seat within a bore drilled entirely through the lower sash and a portion of the upper sash of a double hung type window. The bore is drilled of sufficient depth to recess entirely the barrel so that there are no interiorly projecting or otherwise exposed parts. The barrel is interiorly formed with a recessed socket and the special key is provided to engage the socket for barrel removal purposes when it is desired to open the window.

## Claims

### Claim 1

In a locking device adapted to seat within openings provided in a window construction, the combination of
a barrel having a locking means at one end thereof,
the locking means comprising an end recess in the barrel, the recess being defined by cylindrical sidewalls and a generally flat bottom, and an opening through the sidewall in communication with the recess,
the barrel being positioned to be recessed entirely into the window construction; and
a key adapted for releasable engagement with the locking means to alternately engage and disengage the barrel, the key comprising a first leg and a second leg, the second leg comprising a bent tooth, the tooth being adapted to be removably inserted into the opening, and the first leg being longer than the second leg, and
the first leg terminating endwardly in a positioning finger, the positioning finger being adapted to contact the recess bottom; whereby the barrel may be removably inserted into a portion of the window construction.

### Claim 2 (depends on 1)

The locking device of claim 1 wherein the length of the first leg exceeds the length of the second leg by a distance equal to the distance from the recess bottom to the opening.

### Claim 3 (depends on 1)

The locking device of claim 1 and means to normally space the first leg of the key from the second leg.

### Claim 4 (depends on 3)

The locking device of claim 3 wherein the means to space comprises a web, the web interconnecting the first and second legs.

### Claim 5 (depends on 4)

The locking device of claim 4 wherein the spacing between the first and second legs can be temporarily reduced by squeezing the legs together.