# US 4,376,351 A · Wheel

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- Number: US 4,376,351 A
- Document ID: US4376351A
- Status: Granted
- Kind: A
- Application number: 06/294,047
- Filed: 1981-08-18
- Granted: 1983-03-15
- Earliest claimed: 1980-09-02
- Inventors: Peter Larws
- Web page: https://patentgrep.com/patent/US4376351A

## CPC

- A63H 33/042: {Mechanical, electrical, optical, pneumatic or hydraulic arrangements; Motors}
- A63H: TOYS, e.g. TOPS, DOLLS, HOOPS OR BUILDING BLOCKS

## Abstract

A wheel for use in a construction system of building bricks in the form of the letter "H". This system is based on an arbitrary standard dimension "a". The wheel has a rim and a hub and optionally a ring surrounding the rim. The wheel is provided with axially extending grooves. The specified dimensions make the wheel especially advantageous for use with the system.

## Claims

### Claim 1

A wheel for use in a construction system of building bricks in the form of the letter "H" which system is based on an arbitrary standard dimension "a"; said wheel comprising:
A. A rim having two opposing sides and a diameter of 12a/.pi., said rim having a plurality of axially extending and radially aligned grooves on each side of the rim, equally spaced around the circumference of the rim; each of said grooves having opposing sides spaced from each other by the distance "a"; said rim having an axial cylindrical opening; and
B. a hub rotatably mounted in the axial cylindrical opening of the rim; said hub having an axially disposed square opening having dimensions "a" by "a";
wherein the wheel has a width 2a.

### Claim 2 (depends on 1)

The wheel of claim 1 wherein each axially extending groove has an innermost surface which is spaced a distance "a" from the axis of rotation of the wheel.

### Claim 3 (depends on 1)

The wheel of claim 1 having a ring fixed to its periphery wherein the outside diameter of the ring is 4a.

### Claim 4 (depends on 3)

The wheel of claim 3 wherein the width of the ring is a/2.

### Claim 5 (depends on 3)

The wheel of claim 3 wherein the width of the ring is "a".

### Claim 6

A wheel for use in a construction system of building bricks in the form of the letter "H" which system is based on an arbitrary standard dimension "a"; said wheel comprising:
A. a rim having two opposing sides and a diameter of 12a/.pi., said rim having a plurality of axially extending and radially aligned grooves on each side of the rim, equally spaced around the circumference of the rim; each of said grooves having opposing sides spaced from each other by the distance "a"; said rim having an axial cylindrical opening; and
B. a hub rotatably mounted in the axial cylindrical opening of the rim; said hub having an axially disposed square opening having dimensions "a" by "a"; and
C. a ring surrounding the rim fixedly held in a circumferential groove in the rim; and
wherein the wheel has a width 2a; and
wherein each axially extending groove has an innermost surface which is spaced a distance "a" from the axis of rotation of the wheel.