Regressive hydraulic damper
a hydraulic damper and hydraulic technology, applied in the direction of shock absorbers, springs/dampers functional characteristics, wound springs, etc., can solve the problem of hydraulic dampers that can be difficult to ride at higher speeds
Inactive Publication Date: 2017-08-24
GARTNER BILL J
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- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Benefits of technology
This solution provides improved low-speed damping without increasing harshness at higher speeds, enhancing vehicle ride quality and control by dynamically adjusting damping forces based on velocity.
Problems solved by technology
Too much low speed damping for improved body control can result in a harsh ride at higher speeds with hydraulic dampers, because the hydraulic damping force is a function of the velocity of the piston and this force typically increases as the velocity increases.
Method used
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[0036]For the purposes of promoting an understanding of the principles of the invention, reference will now be made to the embodiments illustrated in the drawings and specific language will be used to describe the same. It will nevertheless be understood that no limitation of the scope of the invention is thereby intended, such alterations and further modifications in the illustrated device, and such further applications of the principles of the invention as illustrated therein being contemplated as would normally occur to one skilled in the art to which the invention relates.
[0037]The use of an N-series prefix for an element number (NXX) refers to an element that is the same as the non-prefixed element (XX), except as shown and described thereafter. Although various specific quantities (spatial dimensions, temperatures, pressures, times, force, resistance, current, voltage, concentrations, etc.) may be stated herein, such specific quantities are presented as examples only, and are ...
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A damper of shock and vibration. In one embodiment there is a hydraulic damper with a regressive damping characteristic in both compression and extension, such that damping forces decrease with increased stroking velocity within a predetermined range of stroking velocity. Outside of this range, damping forces are progressive, such that the damping force increases with increased stroking velocity. In another embodiment, there is a hydraulic damper with a second, slidable piston within one of the internal chambers defined by the main piston. This secondary piston is spring loaded and hydraulically latchable at either a first position or a second position based on the pressure differential across the main piston.
Description
CROSS REFERENCE TO RELATED APPLICATION[0001]This application is a continuation of U.S. patent application Ser. No. 12 / 144,530, filed Jun. 23, 2008, now issued as U.S. Pat. No. 9,494,209, on Nov. 15, 2016, which claims the benefit of priority of U.S. Provisional Patent Application Ser. No. 60 / 945,365, filed Jun. 21, 2007, all of which are incorporated herein by reference.FIELD OF THE INVENTION[0002]The present invention pertains to shock and vibration dampers, and in particular to a hydraulic shock absorber having regressive characteristics.BACKGROUND OF THE INVENTION[0003]Vehicles that traverse a roadway must deal with irregularities in the roadway such as bumps and depressions. Many wheeled vehicles incorporate damped suspensions. The damping force levels are usually a compromise between low speed damping support of the vehicle body movements and high speed damping of bumps and depressions. Too much low speed damping for improved body control can result in a harsh ride at higher sp...
Claims
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IPC IPC(8): F16F9/516F16F9/32F16F9/512F16F9/34
CPCF16F9/516F16F9/3405F16F9/3214F16F2238/026F16F9/5126F16F2222/123F16F2228/14F16F9/3228F16F9/48
Inventor GARTNER, BILL J.
Owner GARTNER BILL J