Patent US3757464A successfully refreshed from Google Patents.
US3757464A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Toy road grader
Assignee: Individual
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Filing: 1972-05-30
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Granted: 1973-09-11
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Expires: 1992-05-30
Abstract
Abstract A toy electrical road grader is provided which is adapted to be operated by remote control from a portable electrical power supply and switch unit. The toy includes several reversible electric motors, one for turning a pair of front wheels to the right or left in unison for steering purposes, two for operating traction wheels forward simultaneously or backward simultaneously, and two for adjusting the height and the slope of a scraper blade.
Inventors
- 👤 R Gagnon
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 13:34
CPC Classifications
A; A63; A63H; A63H17/00; A63H17/12; A63H17/26; A63H17/36; A63H30/00; A63H30/02
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
195 words
A toy in the form of a simulated road grader comprising, in combination, a. a body having a rear section and a long rigid forward extension, b. a plurality of supporting traction wheels on the body; c. electric motor means on the body for driving said traction wheels forward or backward in unison, d. a steering wheel assembly at the forward end of the extension comprising a pair of steering wheels and a common support for the steering wheels; e. means for turning the steering wheels in unison to the right or left including a reversible, driving, electric motor for that purpose, f. an angularly disposed, transversely extending scraper blade, g. right and left, independently adjustable toggles mounted on the body and supporting the right and left ends of the scraper, respectively, h. reversible electric motors mounted on the body and each connected to operate one of the toggles in either of two opposite directions for adjusting and controlling the slant and elevation of the scraper, and i. a portable remote control and operating unit including electrical power means and a collection of switches operable for driving selected motors in either of two opposite directions.
Claim 2
Dependent Claim
195 words
A toy in the form of a simulated road grader comprising, in combination, a. a body having a rear section and a long rigid forward extension, b. a plurality of supporting traction wheels on the body; c. electric motor means on the body for driving said traction wheels forward or backward in unison, d. a steering wheel assembly at the forward end of the extension comprising a pair of steering wheels and a common support for the steering wheels; e. means for turning the steering wheels in unison to the right or left including a reversible, driving, electric motor for that purpose, f. an angularly disposed, transversely extending scraper blade, g. right and left, independently adjustable toggles mounted on the body and supporting the right and left ends of the scraper, respectively, h. reversible electric motors mounted on the body and each connected to operate one of the toggles in either of two opposite directions for adjusting and controlling the slant and elevation of the scraper, and i. a portable remote control and operating unit including electrical power means and a collection of switches operable for driving selected motors in either of two opposite directions.
Claim 3
Dependent Claim
49 words
A toy in the form of a simulated road grader as set forth in claim 1 in which all the requisite electrical conductors for controlling and operating the motors on the vehicle from the remote control unit are insulated from one another and combined into a single flat cable.
Claim 4
Dependent Claim
94 words
A toy in the form of a simulated road grader as set forth in claim 1 in which the traction wheels on which the body is mounted include a forward pair upon a forward common axle and a rear pair upon a rear common axle, the means for driving said wheels including a first drive motor for the front axle and a second drive motor for the rear axle, and the operating and control means for said traction wheel driving motors is constructed and arranged to compel said motors to act always in unison.
Claim 5
Dependent Claim
51 words
A toy in the form of a simulated road grader as set forth in claim 1 in which provision is made of a cruciform scraper blade carrier which extends rearwardly from the forward end of the extension and whose transverse arm is connected at its opposite ends to the respective toggles.
Claim 6
Dependent Claim
54 words
A toy in the form of a simulated road grader as set forth in claim 4 in which a universal connection is provided between the forward end of the extension and the forward end of the scraper blade carrier, the carrier serving as a tension member for resisting rearward displacement of the scraper blade.
Claim 7
Dependent Claim
84 words
A toy in the form of a simulated road grader as set forth in claim 5 in which a scraper blade anchorage is provided for resisting lateral displacement of the scraper blade while freely permitting vertical or tilting adjustment, consisting of a rigid arm affixed to the body and extended well to one side of the vehicle, and a link pivotally connected to the free end of the arm and pivotally connected to the scraper blade carrier at the opposite side of the vehicle.
Claim 8
Dependent Claim
62 words
A toy in the form of a simulated road grader as set forth in claim 4, in which the scraper blade is fixedly mounted on a rigid flat plate, which flat plate is pivotally mounted on the carrier with freedom for angular adjustment about a roughly vertical axis, and bears frictionally against the carrier for resistinG angular displacement of the scraper blade.
Claim 9
Dependent Claim
141 words
A toy in the form of a simulated grader as set forth in claim 1 in which the drive of the steering wheels from the associated motor includes a rearwardly located, directionally fixed, forwardly extending shaft, an intermediate shaft universally connected at its opposite ends to said first shaft and to a disaligned, forwardly located, forwardly extending threaded shaft, a vertically extending crankshaft having an upper arm and a lower arm, a nut mounted in the upper arm with freedom for turning about a vertical axis through which the forwardly extending threaded shaft is threaded for turning the crankshaft in response to rotation of the threaded shaft, a steering wheel actuating crossbar extending between the steering wheels and having connection with them, and a second arm on the crankshaft engaged with the crossbar for operating the crossbar to right or left.
Claim 10
Dependent Claim
62 words
A toy in the form of a simulated road grader as set forth in claim 1 in which the steering wheel assembly comprises a rigid frame member, means supporting the frame member from the forward end of the extension with freedom for transverse rocking movement relative to the body, and means supporting the wheels steerably at opposite ends of the frame member.
Claim 11
Dependent Claim
54 words
A toy in the form of a simulated road grader as set forth in claim 9 in which the means supporting the frame member from the forward end of the extension with freedom for transverse rocking includes cooperative bearings and a shaft which slopes downward from front to rear for promoting stability of steering.
Claim 12
Dependent Claim
67 words
A toy in the form of a simulated road grader as set forth in claim 1 in which a front pair of traction wheels and a rear pair of traction wheels are carried by a bogie, and provision is made of means supporting the rear end of the body from the bogie with freedom for tilting of the bogie about a transverse axis relative to the body.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-09-10 | 1977-03-12 | 1977-09-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-09-10 | 1981-03-12 | 1981-09-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-09-10 | 1985-03-12 | 1985-09-11 | $7700.00 | Window Closed / Lapsed |