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| Number | Title | Issue Date |
| 7287626 | Buffer device for elevator In a buffer device for an elevator, a hydraulic buffer that alleviates shock generated when a traveling body impacts at the bottom of a hoistway is located at the bottom of the hostway. Provided between the traveling body and the bottom of the hoistway is an elastic... | 10/30/2007 |
| 6550394 | Retractable auxiliary bumper for hydraulic or pneumatic railway suspensions An auxiliary suspension for hydraulic or pneumatic railway car suspensions is disclosed. The auxiliary suspension includes a bumper assembly which is located below the railcar body. The bumper assembly further includes a bumper pad that is retracted when ... | 04/22/2003 |
| 6279486 | Device for damping the transverse and hunting movements of a vehicle, and vehicle provided with such a device This damping device comprises: two symmetrical jacks (10, 10'), extending respectively between each support member (8, 6) and the housing (4), each jack (10, 10') defining two chambers (24, 24', 26, 26') filled with a hydraulic fluid (16, 16'), two hydraulic l... | 08/28/2001 |
| 5875721 | Railway car truck and method and apparatus for velocity-dependent friction damping Viscous damping such as provided by hydraulic dampers is employed to load frictional energy dissipating elements, such as friction wedges used to damp relative movements between the bolster and the side frames in a conventional railway car truck, such tha... | 03/02/1999 |
| 5662046 | Method and apparatus for controlling railway truck hunting and a railway car body supported thereby A method and apparatus for controlling relative movement such as rotary movement between a railway truck and a car body supported thereby to control truck hunting through application of reaction forces resisting such rotary movement which are effective pr... | 09/02/1997 |
| 5074624 | Bogie vehicle with electrohydraulic brakes and hydropneumatic suspension The railborne bogie vehicle with electrohydraulic brakes and hydropneumatic leveling suspension has in each of its bogies a hydraulic pressure supply unit (9) from which pressure control valves (15, 16) parallel to each other provide pressure to both the ... | 12/24/1991 |
| 4936226 | Railway truck snubber A hydraulic snubber device and more particularly, a snubber adapted to be interposed in the spring group between a bolster and a side frame member and having a single primary operating cartridge which is selectively usable with a plurality of differing co... | 06/26/1990 |
| 4693185 | Control systems for vehicle fluid suspension systems The invention provides a control system for a vehicle fluid spring suspension system consisting of four fluid springs which support the vehicle body from two longitudinally-spaced trucks. Typically such a vehicle is a rail car employing air springs. The t... | 09/15/1987 |
| 4526109 | Laterally damped railway car A laterally disposed cylinder including fluid therein connected between a truck and car body is responsive to lateral forces to provide low damping when relatively low lateral forces are applied and proportionally higher damping as relatively higher later... | 07/02/1985 |
| 4480555 | Double acting railway car stabilizing cylinder A hydraulic stabilizing device utilized to dampen the sway of railway cars comprising a double acting hydraulic cylinder having a center position wherein the fluid is locked in the opposing chambers of the cylinder except for high pressure relief once the... | 11/06/1984 |
| 4245563 | Hydraulically damped railway car body roll An arrangement for controlling car body roll in high capacity railroad freight cars, in accordance with which a hydro-pneumatic roll contact unit is incorporated in the car truck spring groups that support the respective truck bolsters. The roll control u... | 01/20/1981 |
| 4228741 | Automatically releasing stabilizer A stabilizer for providing railway car wheel-truck anti-hunting stabilization with automatic stabilizer releasing at rail curves. This stabilizer comprises first and second anchors attachable respectively to the car body and truck, the stabilizer having a... | 10/21/1980 |
| 4198911 | Snubber A hydraulic snubber device and more particularly, a snubber adapted to be interposed between a bolster and a side frame member and being operative to provide a first damping rate when the railway car is operating on tangent track and at equilibrium speed ... | 04/22/1980 |
| 4185719 | Truck damping A piston and cylinder motion dampening device having spiral groove metering, an orificed two-way pressure relief valve or a screw-on spring or an over-extension limiting seal retainer. A push-together method of assembling a piston and cylinder motion dampening... | 01/29/1980 |
| 4162062 | Hydraulic railway car sway damper A main body member having a head member bolted to one end defines the primary cylinder end portion of a single-ended hydraulic cylinder. A piston rod bearing insert is pressed into the main body bore which defines a cylinder bore. A piston is bolted to a ... | 07/24/1979 |
| 4132176 | Hydraulically dampened railway truck bolster An apparatus for railway freight car control including a damping device adapted to be interposed between a bolster end and side frame member in a manner that the longitudinal axis thereof is inclined inwardly towards the swing axis of the side frame thus ... | 01/02/1979 |
| 4106412 | Fluid truck bolster snubber A piston and cylinder motion dampening device having spiral groove metering, an orificed two-way pressure relief valve or a screw-on spring or an over-extension limiting seal retainer. A push-together method of assembling a piston and cylinder motion dampening... | 08/15/1978 |
| 4077496 | Railway truck movement damping A hydraulic snubber device and method of damping for railway trucks and more particularly a snubber adapted to be interposed between a bolster and a side frame member and being operative to provide a first damping rate when the railway car is operating on... | 03/07/1978 |
| 4004525 | Fluid truck snubber A hydraulic snubber assembly for railroad car trucks and more particularly a hydraulic snubber which is disposed intermediate a bolster and side frame and which includes improved means for biasing and maintaining such snubber into operational position.... | 01/25/1977 |
