Railways – Traction – Cable
Reexamination Certificate
2000-08-11
2001-11-27
Morano, S. Joseph (Department: 3617)
Railways
Traction
Cable
C104S206000, C104S209000, C104S216000
Reexamination Certificate
active
06321658
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Field of the Invention
Object of the present invention is a mobile jaw vice for clamping and unclamping vehicles to and from a traction cable of a transport system.
2. Description of the Background
The traction-cable rail transport systems currently known make use of synchronised braking or acceleration rollers of the vehicle (usually a cab) in the proximity of terminal or intermediate stations of a determined funicular route to be covered; a two mobile-jaw vice, connected to the cab floor, is used for unclamping the vehicle from the traction cable when the rollers decelerate the vehicle and, analogously, the jaws of the vice are driven so as to grip the cable when the run restarts and the vehicle is accelerated.
Nevertheless, the jaws used exhibit some disadvantages during the closing step, above all if the vehicle makes wide oscillations, due to the load or to dynamic stresses; in fact in this case also the traction cable may oscillate widely, thus significantly reducing the area of the portion of the grip synchronism. Moreover, the passage from the traction through cable to traction through draft wheels can cause serious defects, such as for example, pulsed stresses and excessive wear of the mechanical members on which the above cable can engage, in case the rollers are arranged in determined positions adapted to follow particular routes such as, for example, curvilinear and at the same time, rising trajectories.
SUMMARY OF THE INVENTION
Thus, an objective of the present invention is that of providing an improved mobile jaw vice for clamping and unclamping vehicles to and from a traction cable of a transport system, which should overcome the disadvantages mentioned above, that is to say, that of providing an improved mobile jaw vice which should allow attaining a firm and safe grip in all cases, also when the vehicle makes significant oscillations in vertical and horizontal direction, caused by the load variation due, for example, to the passengers' boarding and getting off, or to external dynamic stresses.
Another objective of the invention is that of providing an improved mobile jaw vice for clamping and unclamping vehicles to and from a traction cable of a transport system, which should guarantee a substantially large symmetrical opening of the jaws with respect to the diameter of the traction cable.
Further objective of the present invention is that of indicating an improved mobile jaw vice which should allow creating a sufficient space for housing, in horizontal position, a cable-guiding roller so as to minimise the stresses to which the same cable is subject.
Said objectives are attained by an improved mobile jaw vice for clamping and unclamping vehicles to and from a traction cable of a transport system, according to claim
1
, to which reference shall be made for brevity.
Advantageously, the mobile jaw vice according to the invention allows arranging and orientating at will and need along the system, the cable-guiding line rollers so as to allow the guiding rail to cover any trajectory, such as for example, a curvilinear and rising or descent trajectory.
In this way, the cable is prevented from imparting undesired stresses to the cable-guiding rollers. Moreover, the particular arrangement of the cable-guiding rollers according to the invention guarantees a perfect guide of the cable and avoids an undesired and dangerous slipping out of the same.
REFERENCES:
patent: 913775 (1909-03-01), Seymour
patent: 2955544 (1960-10-01), Goirand
patent: 5111751 (1992-05-01), Zlotek
patent: 5595122 (1997-01-01), Levi et al.
patent: 0 327 882 (1989-08-01), None
patent: 0 644 095 (1995-03-01), None
patent: 0 687 608 (1995-12-01), None
Levi Ferruccio
Pabst Otto
Jules Frantz F.
Leitner S.p.A.
Morano S. Joseph
Oblon & Spivak, McClelland, Maier & Neustadt P.C.
LandOfFree
Mobile jaw vice for clamping and unclamping vehicles to and... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Mobile jaw vice for clamping and unclamping vehicles to and..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Mobile jaw vice for clamping and unclamping vehicles to and... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2594031