WHEEL DRIVEN ARTICULATED BULLDOZER

• US 3,747,265 A
• Filed: 10/18/1972
• Issued: 07/24/1973
• Est. Priority Date: 10/18/1972
• Status: Expired due to Term

• Current Assignee: Robert A. Gagnon
• Original Assignee: Robert A. Gagnon
• Inventors: Gagnon, Robert A.
• Primary Examiner(s): Mancene, Louis G.
• Assistant Examiner(s): Lever, Jr., Jack Q.
• Application Number:
  US05/298,560
• Time in Patent Office: 279 Days
• Field of Search: 46/40,210,219,206,202,214,211,215
• US Class Current: 446/425
• CPC Class Codes: A63H 17/12 with cranes, winches or the like
• CPC Class Codes: A63H 30/00 Remote-control arrangements specially adapted for toys, e.g. for toy vehicles steering mechanisms for toy vehicles A63H17/36; for model railways A63H19/24, A63H19/28

Abstract

This invention relates to a remotely controlled toy in the form of a wheel driven, articulated bulldozer. The bulldozer consists of front and rear body sections, each equipped with a pair of supporting wheels, with all the wheels arranged to be driven through remote control, forward or backward, always in unison with one another. The front and rear sections of the bulldozer are connected for relative movement about a vertical axis for steering purposes, and remotely controlled means is provided for relatively adjusting the sections toward the right or toward the left, about such axis. The front and rear sections are connected with freedom for tilting relative to one another. The front section includes a bulldozer blade which may be raised and lowered by remote control.

Claims

1. A toy comprising, in combination, a wheel driven bulldozer and a portable remote power and control unit therefor, said bulldozer including a. front and rear body sections, each of which includes a pair of supporting wheels, b. means connecting the body sections with freedom for relative rocking movement about a longitudinally extending horizontal axis;

and, for steering purposes, with freedom for controlled relative movement about a vertical axis;

c. a bulldozer blade together with a blade carrier mounted at the front of the front body section and a reversible carrier operating motor operable to raise and lower the blade, d. reversible motor operated means constructed and arranged to drive the front wheels and the rear wheels forward or backward in unison;

e. reversible motor operated means constructed and arranged relatively to turn the front and rear body sections, and f. switch means included in the remote power and control unit for selectively driving f1. the wheel operating motor means forward or backward, f2. the blade raising and lowering motor in raising or lowering direction, and f3. the body turning motor in either of two opposite directions.

2. A toy as set forth in claim 1 in which separate motors are provided on the front body section and on the rear body section, respectively, for the front wheels and for the rear wheels, which motors are of like construction and are coordinately connected to the wheels which they drive, and in which the switch means controlling said motors cause the motors invariably to be driven in harmony with one another.

3. A toy as set forth in claim 1 in which the reversible body turning motor, mounted on one of the body sections, is connected to the other body section through a motor driven shaft, a crank fast on the shaft, and a link.

4. A toy as set forth in claim 1 in which the vertical axis about which the front and rear body sections turn relative to one another is located substantially equidistant from the axes about which the front and rear wheels turn.

5. A toy as set forth in claim 1 in which all electrical conductors which run from the power and control unit to the motors on the vehicle sections are combined into a single flat cable in which they are insulated from one another.

6. A toy as set forth in claim 1 in which the blade raising and lowering means comprises an internally threaded member mounted on the bLade and a rotary motor driven, threaded shaft screwed through said threaded member.

7. A toy as set forth in claim 1 in which limits of movement are imposed on motor operated parts and slip clutches are included between such parts and their operating motors so that an involved motor may continue to operate without strain after the involved part has been arrested at its limit of movement.

8. A toy as set forth in claim 1 in which the blade raising and lowering means comprises an output shaft, a motor driven gear revolubly mounted on the shaft, a slip clutch connecting the gear to drive the shaft and blade raising and lowering means responsive to rotation of the shaft.

9. A toy as set forth in claim 1 in which the blade raising and lowering means responsive to rotation of the shaft comprises a crank fast on the shaft and a link which connects the crank to the blade.