Land vehicles – Wheeled – Coasters
Reexamination Certificate
1999-10-01
2001-09-04
Oberleitner, Robert J. (Department: 3613)
Land vehicles
Wheeled
Coasters
C188S021000, C188S00200R, C135S067000, C280S001500, C280S043000, C280S047340
Reexamination Certificate
active
06283484
ABSTRACT:
FIELD OF THE INVENTION
The present invention relates to a brake system for a wheeled walker.
BACKGROUND OF THE INVENTION
Wheeled walker frames are normally constructed from metal tubing, which results in constructions which are stable, durable and relatively light. According to the legislation of most European countries, such a wheeled walker frame must satisfy certain requirements in order to be employed within public medical care. It should have as hygienic an exterior as possible, ie. clean, smooth surfaces, few dirt pockets and few projecting parts. It should further be provided with a brake for each handle which in turn must be capable of being adjusted in the vertical direction in as simple a manner as possible, in which event the adjustment of the brake should preferably take place synchronously, or employing very simple measures. A glance at prior art constructions shows that the transmission of the braking force from the handle to the brake substantially takes place via three principles: a) a flexible cable, b) a strap or lanyard of textile, or c) a metal rod, all disposed wholly or partly outside the metal tubing. These prior art brake systems suffer from drawbacks. The flexible cable forms loops which may catch in projecting objects such as handles on furniture. The same applies to the textile strap which must be adjusted after a movement of the handle, and also the metal rod located outside the tubing can catch in extraneous objects. For all three types, it is a common feature that they are unattractive and difficult to keep clean, which is of importance since wheeled walker frames are lent out to different patients during a period of convalescence, and therefore must be carefully cleaned before being passed on to the next user.
SUMMARY OF THE INVENTION
The object forming the basis of the present invention is to obviate or at least reduce the above outlined drawbacks inherent in prior art wheeled walker frames.
This object is solved according to the present invention.
The present invention makes possible the enclosure of the brake system in the frame tubing, which eliminates the drawbacks inherent in prior art wheeled walker frames with projecting parts and brake cables, etc.
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Antonelli Terry Stout & Kraus LLP
Oberleitner Robert J.
Pezzlo Benjamin A
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