# US 5,131,699 A · Locking device

> Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt

- Number: US 5,131,699 A
- Document ID: US5131699A
- Status: Granted
- Kind: A
- Application number: 07/745,528
- Filed: 1991-08-15
- Granted: 1992-07-21
- Earliest claimed: 1990-09-26
- Assignees: Temet Oy
- Inventors: Klaus Frestadius
- Web page: https://patentgrep.com/patent/US5131699A

## CPC

- E05C 9/043: {with crank pins and connecting rods}
- Y10T 292/0844: Lever
- Y10T 292/62: Bolt casings
- E05C: BOLTS OR FASTENING DEVICES FOR WINGS, SPECIALLY FOR DOORS OR WINDOWS (latching means for sideboard or tailgate structures for vehicles B62D, {B62D33/02}; fastening devices for constructional or engineering elements E04, F16B; locks, fastening devices structurally or operatively combined or having significant cooperation with locks E05B; means for operating or controlling wing fasteners in conjunction with mechanisms for moving the wing E05F)
- Y10T: TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION

## Abstract

A locking device relating to a door construction to be used in an air raid shelter or the like. The door construction (1) comprises a door panel (4) arranged in a frame (3) and provided with a supporting frame (5). To make the door construction, subjected to a load, as unyielding and stable as possible, a mechanism (21 to 24) of the locking device (2) is arranged in the supporting frame (5), actual bolt members being constituted by cylinder elements (23) to be supported on the supporting frame (5) and to be arranged to comply in shape with recesses (31) of the frame (3).

## Claims

### Claim 1

A locking device relating to a door construction to be used in an air raid shelter or the like, which door construction comprises at least one door panel unit arranged in a frame, a supporting frame joined to the door panel unit and said locking device including a lever arm application arranged in the supporting frame, said supporting frame comprising a beam construction arranged in connection with one vertical edge of the door panel unit and extending substantially from the lower edge of the door panel unit to its upper edge, and said locking device including a mechanism arranged in the beam construction, said mechanism including effective bolt members being constituted by cylinder elements arranged at the ends of said lever arm application, said cylinder elements being effective at the lower edge and upper edge of the door panel unit and adapted to be supported on the beam construction on the one hand and to be arranged in cup-shaped recesses in the frame on the other hand, said recesses corresponding to the form of the cylinder elements.

### Claim 2 (depends on 1)

A locking device according to claim 1, wherein said lever arm application comprises two arms extending substantially in the vertical direction of the door panel unit, and on the ends of said arms, said cylinder elements are articulated in the vicinity of the upper and the lower edge of the door panel unit.