GB714180A - Improvements in or relating to hydraulic dampers - Google Patents
Improvements in or relating to hydraulic dampersInfo
- Publication number
- GB714180A GB714180A GB2883851A GB2883851A GB714180A GB 714180 A GB714180 A GB 714180A GB 2883851 A GB2883851 A GB 2883851A GB 2883851 A GB2883851 A GB 2883851A GB 714180 A GB714180 A GB 714180A
- Authority
- GB
- United Kingdom
- Prior art keywords
- piston
- valve
- port
- spring
- duct
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F9/00—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium
- F16F9/32—Details
- F16F9/50—Special means providing automatic damping adjustment, i.e. self-adjustment of damping by particular sliding movements of a valve element, other than flexions or displacement of valve discs; Special means providing self-adjustment of spring characteristics
- F16F9/504—Inertia, i.e. acceleration,-sensitive means
Abstract
714,180. Hydraulic dampers. SHEPHERD, G. H. Dec. 10, 1951, No. 28838/51. Class 108(3) In a hydraulic damper for a vehicle suspension, a freelyacting spring-loaded by-pass valve l is actuated by inertia on acceleration of the unsprung mass so that a minimum restraint is offered to movement of this mass during the duration of the period of any impact thereon due to forward movement of the vehicle. A piston rod a has a concentric passage y which connects the space below a piston c (via a port x) with a reservoir R. A further piston t is slidable on the rod a against the action of a spring wand can - thus cut-off the port x. A plate B which is a sliding fit in the cylinder d has an integral sleeve E which is formed with ports F and is slidably mounted relative both to the rod a and to a head e between the cylinder d and reservoir R. The plate B is acted on by a spring D and a weaker spring C. The space between the plate B and the piston c is connected with the passage y by a small section duct G and a larger section port X, the entry to which is controlled by a piston valve I normally urged to a port-opening position by a spring J. Each end-face of the valve I is connected by a small-section duct K and a non-return ball-valve L permits flow from the space between the pistons t, c to the lower face of the valve I. A duct r in the lower end-wall of the cylinder d leads to the reservoir R but is normally closed to the interior of the cylinder d by the valve l which is urged by a spring n into engagement with an abutment ring m. An annular duct 0 in the valve I is connected by ports q with the interior of the cylinder d. , Operation: During the duration of an impact which results in a compression stroke, the valve l, due to its inertia, moves to connect the ducts 0 and r and liquid passes freely from below the piston t to the reservoir R.. Liquid is replenished through a ball-valve H. When the impact ceases the valve l moves back to cut off the duct rand damping of the momentum of the unsprung parts occurs by restriction to flow through the port x which is progressively cut-off by movement of the piston t on the piston rod a. During the compression stroke the plate B follows the piston c owing to the restriction to flow provided by the duct G. On rebound, flow from above the piston occurs freely through the space between the piston rod a and the inner wall of the head e until this space is cut-off by return therein of the sleeve E. This occurs when the piston again reaches its normal static-load position. The plate B takes up the same position relative to the head e whatever the static load due to the action of the spring D which overcomes the spring C and drives in the sleeve E until the port F is cut off. The port X permits a free flow from above the piston c to the reservoir, via the passage y, when the vehicle wheel drops into a pothole from the static position. On rebound, after a compression stroke, the port X is closed since during the compression stroke pressure acts through the one-way valve L on the underside of the piston valve I. On the rebound stroke, liquid is trapped between the valves I and L and escapes slowly through the duct K.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB2883851A GB714180A (en) | 1951-12-10 | 1951-12-10 | Improvements in or relating to hydraulic dampers |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB2883851A GB714180A (en) | 1951-12-10 | 1951-12-10 | Improvements in or relating to hydraulic dampers |
Publications (1)
Publication Number | Publication Date |
---|---|
GB714180A true GB714180A (en) | 1954-08-25 |
Family
ID=10281968
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB2883851A Expired GB714180A (en) | 1951-12-10 | 1951-12-10 | Improvements in or relating to hydraulic dampers |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB714180A (en) |
Cited By (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE4029596A1 (en) * | 1990-09-19 | 1992-03-26 | Teves Gmbh Alfred | Vibration damper for vehicles - includes by=pass pipe and axially displaceable inertia bodies |
US6334516B1 (en) * | 2000-04-27 | 2002-01-01 | Edelbrock | Acceleration sensitive twin tube shock absorber |
DE102004058965A1 (en) * | 2004-12-08 | 2006-07-06 | Zf Friedrichshafen Ag | Vibration damper with amplitude-selective damping force |
DE102006047093A1 (en) * | 2006-10-05 | 2008-04-10 | Zf Friedrichshafen Ag | Vibration damper with amplitude-selective damping force |
DE102006054257A1 (en) * | 2006-11-17 | 2008-05-29 | Zf Friedrichshafen Ag | Vibration damper with amplitude-dependent damping force |
DE102009057888B3 (en) * | 2009-12-11 | 2011-06-01 | Knorr-Bremse Systeme für Nutzfahrzeuge GmbH | Damping valve and air spring |
US8607942B2 (en) | 2006-04-02 | 2013-12-17 | Fox Factory, Inc. | Suspension damper having inertia valve and user adjustable pressure-relief |
US9657804B2 (en) | 2001-08-30 | 2017-05-23 | Fox Factory, Inc. | Front bicycle suspension assembly with inertia valve |
DE102008008268B4 (en) | 2008-02-08 | 2021-10-07 | Stabilus Gmbh | mute |
US11346422B2 (en) | 2001-08-30 | 2022-05-31 | Fox Factory, Inc. | Front bicycle suspension assembly with inertia valve |
-
1951
- 1951-12-10 GB GB2883851A patent/GB714180A/en not_active Expired
Cited By (18)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE4029596A1 (en) * | 1990-09-19 | 1992-03-26 | Teves Gmbh Alfred | Vibration damper for vehicles - includes by=pass pipe and axially displaceable inertia bodies |
US6334516B1 (en) * | 2000-04-27 | 2002-01-01 | Edelbrock | Acceleration sensitive twin tube shock absorber |
US11346422B2 (en) | 2001-08-30 | 2022-05-31 | Fox Factory, Inc. | Front bicycle suspension assembly with inertia valve |
US9657804B2 (en) | 2001-08-30 | 2017-05-23 | Fox Factory, Inc. | Front bicycle suspension assembly with inertia valve |
US10316924B2 (en) | 2001-08-30 | 2019-06-11 | Fox Factory, Inc. | Front bicycle suspension assembly with inertia valve |
DE102004058965A1 (en) * | 2004-12-08 | 2006-07-06 | Zf Friedrichshafen Ag | Vibration damper with amplitude-selective damping force |
US7523818B2 (en) | 2004-12-08 | 2009-04-28 | Zf Friedrichshafen Ag | Vibration damper with amplitude-selective damping force |
DE102004058965B4 (en) * | 2004-12-08 | 2010-07-08 | Zf Friedrichshafen Ag | Vibration damper with amplitude-selective damping force |
US10359092B2 (en) | 2006-04-02 | 2019-07-23 | Fox Factory, Inc. | Suspension damper having inertia valve and user adjustable pressure-relief |
US8607942B2 (en) | 2006-04-02 | 2013-12-17 | Fox Factory, Inc. | Suspension damper having inertia valve and user adjustable pressure-relief |
US9261163B2 (en) | 2006-04-02 | 2016-02-16 | Fox Factory, Inc. | Suspension damper having inertia valve and user adjustable pressure-relief |
US11085503B2 (en) | 2006-04-02 | 2021-08-10 | Fox Factory, Inc. | Suspension damper having inertia valve and user adjustable pressure-relief |
US9746049B2 (en) | 2006-04-02 | 2017-08-29 | Fox Factory, Inc. | Suspension damper having inertia valve and user adjustable pressure-relief |
DE102006047093A1 (en) * | 2006-10-05 | 2008-04-10 | Zf Friedrichshafen Ag | Vibration damper with amplitude-selective damping force |
EP1908984A3 (en) * | 2006-10-05 | 2010-04-28 | ZF Friedrichshafen AG | Vibration damper with selective damping force amplitude |
DE102006054257A1 (en) * | 2006-11-17 | 2008-05-29 | Zf Friedrichshafen Ag | Vibration damper with amplitude-dependent damping force |
DE102008008268B4 (en) | 2008-02-08 | 2021-10-07 | Stabilus Gmbh | mute |
DE102009057888B3 (en) * | 2009-12-11 | 2011-06-01 | Knorr-Bremse Systeme für Nutzfahrzeuge GmbH | Damping valve and air spring |
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