US3973785A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sled
Assignee: Mannesmann Demag AG
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Filing: 1975-01-13
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Granted: 1976-08-10
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Expires: 1995-01-13
Abstract
Abstract A dual braking system is provided for high speed sleds in which the center of gravity of the operator is placed between fore and aft brake shoes, which are operated simultaneously by the operator without the need for shifting positions. Thus, the brake system is effective even though the operator is naturally shifted forward by the braking action. Also included in the brake system is a wheel assembly, which may be operated by the single brake lever to accommodate fast acceleration. Operating the brake lever to shift the wheel assembly into effective operative shifts the center of gravity of the operator over the wheel assembly. The dual brake shoes pivot around horizontal axes and are disposed adjacent the longitudinal centerline of the sled to avoid lateral deflection of the sled when the brakes are applied.
Inventors
- 👤 Klaus Becker
- 👤 Karl-Heinz Wolsi
- 👤 Bernd Purath
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 19:28
CPC Classifications
B; B62; B62B; B62B17/00; B62B17/08; B62B13/00; B62B13/18
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
230 words
A coaster-type land vehicle, comprising in combination a. an elongated shell-like body with a seat positioned adjacent the rear end thereof; b. a front brake forward of said seat; c. a rear brake rearward of said seat; d. a horizontal axle; e. a single operating lever pivotal around said horizontal axle, said operating lever movable in the longitudinal axis of said vehicle; the improvement characterized by f. said front and rear brakes having substantially horizontal braking surfaces and disposed transverse to and along the longitudinal axis of said vehicle; g. said operating lever having a substantially vertical portion forming the operating handle therefor, and a substantially horizontal portion extending to said axle; h. first connecting means rigidly connecting said horizontal portion and said front brake, said first connecting means extending rearwardly from said pivot axle; i. a linkage rigidly connecting said front and rear brakes; j. said rear brake being suspended to pivot around a torsional axis parallel with said pivotal axle; k. roller means; and l. second connecting means rigidly connecting said horizontal portion and said roller means, said second connecting means extending forwardly from said pivot axle; m. whereby pivoting said operating lever in one direction moves said front and rear brakes simultaneously into engagement with the vehicle sliding surface, and pivoting said operating lever in the opposite direction pivots said roller means into contact with said surface.
Claim 2
Dependent Claim
230 words
A coaster-type land vehicle, comprising in combination a. an elongated shell-like body with a seat positioned adjacent the rear end thereof; b. a front brake forward of said seat; c. a rear brake rearward of said seat; d. a horizontal axle; e. a single operating lever pivotal around said horizontal axle, said operating lever movable in the longitudinal axis of said vehicle; the improvement characterized by f. said front and rear brakes having substantially horizontal braking surfaces and disposed transverse to and along the longitudinal axis of said vehicle; g. said operating lever having a substantially vertical portion forming the operating handle therefor, and a substantially horizontal portion extending to said axle; h. first connecting means rigidly connecting said horizontal portion and said front brake, said first connecting means extending rearwardly from said pivot axle; i. a linkage rigidly connecting said front and rear brakes; j. said rear brake being suspended to pivot around a torsional axis parallel with said pivotal axle; k. roller means; and l. second connecting means rigidly connecting said horizontal portion and said roller means, said second connecting means extending forwardly from said pivot axle; m. whereby pivoting said operating lever in one direction moves said front and rear brakes simultaneously into engagement with the vehicle sliding surface, and pivoting said operating lever in the opposite direction pivots said roller means into contact with said surface.
Claim 3
Dependent Claim
39 words
The vehicle of claim 1, further characterized by a. a central longitudinal ridge integral with and extending forward of said seat; b. a slot in said central longitudinal ridge; and c. said operating lever handle extending through said slot.
Claim 4
Dependent Claim
23 words
The vehicle of claim 1, further characterized by a. said roller means including a roller disposed adjacent each end of said front brake.
References Cited (Backward Citations)
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US630987A
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US1614137A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-08-10 | 1980-02-09 | 1980-08-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-08-10 | 1984-02-09 | 1984-08-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-08-10 | 1988-02-09 | 1988-08-10 | $7700.00 | Window Closed / Lapsed |