US3798995A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Brake operating lever system
Assignee: Individual
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Filing: 1972-11-09
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Granted: 1974-03-26
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Expires: 1992-11-09
Abstract
Abstract A brake system for a vehicle is provided with a mechanical hydraulic operator including a variable ratio operating lever wherein a rod which displaces a piston of a master cylinder of the hydraulic brake system is pivotally connected to a pivotally mounted control lever. A pivotally mounted operating lever has an external cam surface which engages a roll at the pivotal connection of said rod and control lever to transmit an operating force to the rod. The distance between the pivotal mount and pivotal connection of the control lever is substantially equal to the maximum displacement of the rod in actuating the master cylinder of the brake system. Particular angular relationships between the direction of operating force acting on the control lever and the piston rod, the piston rod and the control lever are provided in order to produce a predetermined variable ratio as the operating lever moves in the braking direction.
Inventors
- 👤 H Schroter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 20:42
CPC Classifications
G; G05; G05G; G05G7/00; G05G7/02; G05G7/04; B; B60; B60T; B60T7/00; B60T7/02; B60T7/04; B60T7/06; Y; Y10; Y10T; Y10T74/00; Y10T74/20; Y10T74/20528; Y10T74/20558; Y10T74/2057
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
250 words
A variable ratio operating lever for the brake system of a vehicle comprising a rod adapted to actuate the brake system, a pivotally mounted control lever and pivotally connected to said rod, a pivotally mounted operating lever moveable between release and braking positions, means for transmitting an operating force from said operating lever to said control lever in a direction varying from an angle to substantially a straight line with respect to the longitudinal axis of said rod during the movement of the operating lever toward the braking position, the distance between the pivotal mount of the control lever and pivotal connection of said control lever being substantially equal to the maximum displacement of said rod in actuating the brake system, a first line between the points of engagement of the line of the operating force on the operating and control levers defining an angle of about 165* with a second line between the point of engagement of the operating force on said control lever and the pivotal mount of said control lever in the release position of the operating lever which angle decreases upon the movement of the operating lever in the braking direction, the longitudinal axis of said rod defining an angle of about 45* with a third line between the pivot mount of the control lever and pivot connection of said control lever in the release position of the operating lever which angle increases to about 100* upon movement of the operating lever in the braking direction.
Claim 2
Dependent Claim
250 words
A variable ratio operating lever for the brake system of a vehicle comprising a rod adapted to actuate the brake system, a pivotally mounted control lever and pivotally connected to said rod, a pivotally mounted operating lever moveable between release and braking positions, means for transmitting an operating force from said operating lever to said control lever in a direction varying from an angle to substantially a straight line with respect to the longitudinal axis of said rod during the movement of the operating lever toward the braking position, the distance between the pivotal mount of the control lever and pivotal connection of said control lever being substantially equal to the maximum displacement of said rod in actuating the brake system, a first line between the points of engagement of the line of the operating force on the operating and control levers defining an angle of about 165* with a second line between the point of engagement of the operating force on said control lever and the pivotal mount of said control lever in the release position of the operating lever which angle decreases upon the movement of the operating lever in the braking direction, the longitudinal axis of said rod defining an angle of about 45* with a third line between the pivot mount of the control lever and pivot connection of said control lever in the release position of the operating lever which angle increases to about 100* upon movement of the operating lever in the braking direction.
Claim 3
Dependent Claim
34 words
A variable ratio operating lever as claimed in claim 1 wherein said brake system is hydraulic and said rod is adapted to displace the piston of the master cylinder of the hydraulic brake system.
Claim 4
Dependent Claim
33 words
A variable ratio operating lever as claimed in claim 1 wherein said rod and the line of the operating force transmitted by the operating lever engage said control lever at a point thereon.
Claim 5
Dependent Claim
60 words
A variable ratio operating lever as claimed in claim 1 wherein said rod has one end pivotally connected to said control lever and a roll on said one end, the other end of said rod is operatively connected to actuate said brake system, said operating force transmitting means comprises an external cam on said operating lever engageable with said roll.
Claim 6
Dependent Claim
33 words
A variable ratio operating lever as claimed in claim 4 wherein said rod one end is bifurcated and a pin Extends transversely between the bifurcated portions, said roll being mounted on said pin.
Claim 7
Dependent Claim
53 words
A variable ratio operating lever as claimed in claim 5 wherein said control lever comprises a pair of laterally spaced longitudinally extending arms, one of the pair of ends of said arms being pivotally mounted upon a frame and the other pair of ends of said arms being pivotally connected to said pin.
References Cited (Backward Citations)
FR1166904A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-03-25 | 1977-09-24 | 1978-03-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-03-25 | 1981-09-24 | 1982-03-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-03-25 | 1985-09-24 | 1986-03-26 | $7700.00 | Window Closed / Lapsed |