US2260277A

US2260277A - Bumper, especially applicable to railway vehicles

Info

Publication number: US2260277A
Application number: US308885A
Authority: US
Inventors: Mercier Jean
Original assignee: Individual
Current assignee: Individual
Priority date: 1935-03-12
Filing date: 1939-12-12
Publication date: 1941-10-21
Anticipated expiration: 1958-10-21
Also published as: DE718514C; BE414170A; FR47769E; GB457299A; FR799422A; US2287389A

Description

. Oct. 21, 1941. v J. MERCIER 2,260,277

BUMPER, ESPECIALLY APPLICABLE TO RAILWAY VEHICLES Original Filed March 7, 1936 Patented Oct. 21, 1941 BUMPER, ESPECIALLY APPLICABLE TO RAILWAY VEHICLES Jean Mercier, Paris, France Original application March 7, 1936, Serial No.

Divided and this application December 12, 1939, Serial No. 308,885. In France March 3 Claims.

My present invention relates to bumpers for railway vehicles and it has for its object to provide another embodiment of the generic invention 'disclosed in my application flied March 7, 1936,

Ser. No. 67,715, new issued as Patent No. 2,187,625, of which the present application is a division.

Essentially the present invention provides two or more butters, disposed on either side of the longitudinal axis of the vehicle, the buflers being rigidly connected with two or more pistons, respectively, movable in corresponding cylinders which contain, at one side of the pistons, a compressible fluid, and at the other side of the pistons an incompressible fluid, the cylinder for a piston at one side being so connected with the cylinder for a piston at the other side as to eflect communication between the incompressible fluid sides of the cylinder, whereby the fluid from a cylinder at one side of the vehicle will flow to the cylinder at the other side, and vice versa, according to the respective movements of the pistons.

Other objects will in part be obvious and in part be pointed out hereinafter.

To the attainment of the above objects and ends the invention still further resides in those novel features of construction, combination and arrangement of parts, all of which will be first fully described in the following detailed description and then be particularly pointed out in the appended claims, reference being had to the ac-- companying drawing, in which F18. 1 is a horizontal section illustrating the invention.

Fig. 2 is a diagrammatic view illustrating the working of the system according to the invention.

In the drawing, in which like numbers of reference indicate like parts in both figures, i and 2 represent two railway vehicles each of which has a fixed cylinder 3 located one at each side of the axes of the vehicle.

The cylinders I of one vehicle align, respectively, with those of the opposing vehicle.

Within each cylinder is a piston 4 whose rigid rod carries a buffer 1. Each cylinder encloses a chamber 5 containing acompressible fluid and a chamber 4 containing an incompressible liquid. The chambers i are at the rear sides of the pistons, while the chambers I are at the fore sides thereof. W

Preferably, the chambers I of the cylinders I are connected by a conduit 0 which acts as an equalizing conduit and which, if desired, may be omitted without greatly aflecting the operation of the device.

A conduit 8 connects the chambers 6 of the pistons and contains. also, an incompressible liquid which communicates with that in chambers 6 and 6 and constitutes therewith a shiftable rigid connection between

pistons

4 and 4.

Therefore when a car is negotiating a curve,

the incompressible liquid passes from one cylinder to the other through a conduit 8; one of the buflers 'l is pushed in while the other moves out the same distance, because of the suction produced by the in-moving piston on the incompressibie liquid. when a sudden shock occurs and both buffers l are pushed in simultaneously, the piston will compress the fluid in chambers 5-5 (and conduit 9, if such be used), thus absorbing the shock.

To supply incompressible liquid to or to discharge it from the apparatus,-I provide, on conduit 8, a tube III which, when not in use, is closed by suitable means.,

From the foregoing description, taken in connection with the accompanying drawing, it is thought that the construction, operation and advantages of the invention will be clear to those skilled in the art.

What I claim is: 1

l. A bumper device of the type described, for use in connection with a vehicle and especially a railway vehicle, which comprises, in combination, at least two buflers movably carried by said vehicle on either side of the longitudinal axis thereof, two cylinders rigidly carried by said vehicle, pistons movable with a fluidtight fit inside said cylinders respectively and rigid with said bufl'ers respectively, a passage interconnecting the respective chambers of said cylinders that are located on the outer sides or said pistons, an incompressible liquid filling the whole or these two chambers and said passage, and a compressed gas nlling the two other chambers or said cylinders, respectively, said pistons oemg normally disposed spaced from the ends or their respective cylinders in order that the buners can move in either direction from their normal positions in which both are in the same transverse plane.

2. A bumper device accoramg to claim 1, further including a passage mterconnectmg the two last mentioned chambers.

3. A bumper device according to claim 1, further including a conduit communicating with the flrst mentioned passage for feeding liquid thereinto.

JEAN MERCIER.