# US 4,196,500 A · Seat belt buckle

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- Number: US 4,196,500 A
- Document ID: US4196500A
- Status: Granted
- Kind: A
- Application number: 05/946,743
- Filed: 1978-09-29
- Granted: 1980-04-08
- Earliest claimed: 1976-05-11
- Assignees: Indiana Mills & Manufacturing, Inc.
- Inventors: Hermann E. Happel; James R. Anthony
- Web page: https://patentgrep.com/patent/US4196500A

## CPC

- B60R 22/48: Control systems, alarms, or interlock systems, for the correct application of the belt or harness
- A44B 11/2511: {acting perpendicularly to the main plane of the buckle, e.g. placed on the front face of the buckle}
- B60R 2022/4816: {for sensing locking of buckle}
- B60R 2022/4866: {Displaying or indicating arrangements thereof}
- Y10T 24/45618: and interlocking with independently associated or dissociated projection members
- Y10T 24/45738: and relatively movable handle therefor
- B60R: VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
- A44B: BUTTONS, PINS, BUCKLES, SLIDE FASTENERS, OR THE LIKE (fastenings specially adapted for footwear A43C)
- Y10T: TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION

## Abstract

A seat belt buckle having a laminated or reinforcing plate construction. A main body has a cavity in which a spring is positioned. A latch plate located in the cavity has a pair of outwardly extending arms slidably mounted in pair of mutually opposed upright channels mounted in the cavity. The spring abuts the bottom surface of the latch plate forcing the latch plate upwardly to releasably lock in place a seat belt tongue extending through inlet means into the cavity atop the latch plae. A push button is mounted between the main body and a cover fixedly secured to the main body. The push button has outwardly extending legs slidably received in the channels and abutting the arms on the latch plate whereby the push button may be depressed to move the latch plate and spring downwardly releasing the tongue from the buckle. A plate or block is mounted in a recess on the main body with a second plate mounted thereatop. Lateral force exerted on the latch plate by the tongue is transferred to the channels and then to at least one reinforcing plate and main body.

## Claims

### Claim 1

The combination of:
a tongue plate with a latch aperture;
a buckle into which said tongue plate is inserted and including a main body with a forward lip and a rear stop, a block positioned on said main body between said stop and lip which limit movement thereof with said block defining with said main body a tongue plate-receiving cavity, latching means located in said cavity and projecting into said aperture being operable to releasably hold said tongue plate in said cavity, a plate member positioned between said main body and said block with said main body extending on opposite sides of said plate member and block limiting movement between said plate member, block and said main body; and
locking means extending through said plate member into said block locking said plate member and block together.

### Claim 2 (depends on 1)

The combination of claim 1 wherein:
said block includes an upper wall and a back wall with a ledge extending forward from said back wall into said cavity and parallel to but spaced apart from said upper wall defining an channel in which said tongue plate is located limiting relative motion between said tongue plate and block.

### Claim 3 (depends on 1)

The combination of claim 1 wherein said locking means includes a pair of locking members, said block includes a pair of load transfer members extending from said locking members to said lip transferring load applied by said tongue on said latching means and locking means to said main body.