Exercise devices – User manipulated force resisting apparatus – component... – Utilizing frictional force resistance
Patent
1990-12-06
1992-09-15
Apley, Richard J.
Exercise devices
User manipulated force resisting apparatus, component...
Utilizing frictional force resistance
482120, A63B 21015
Patent
active
051472643
DESCRIPTION:
BRIEF SUMMARY
BACKGROUND OF THE INVENTION
The present invention relates to a resistance reel for exercisers, and wherein an extractive band is pulled out against an adjustable force of resistance and is rewound by a return, spring.
A resistance reel of this type is known, e.g. from French Patent No. 2 274 322, where a resistance reel with the above stated properties is disclosed. Friction disks in a resistance section have full annular faces which are forced towards each other by a spring arrangement comprising a number of helical compression springs which are provided between a friction disk that is non-rotatingly mounted on a shaft and a compression disk which is provided on the shaft and which may, by means of a control wheel cooperating with threads on the shaft, be moved to or from the compression springs to adjust the pressure between the friction disks and thus the braking effect and resistance to unwinding the extractive band. Such control means is bulky, and the frictional heat generated between friction disks during use of the resistance reel may propagate, via the shaft, to the surrounding casing and may heat the casing to a high temperature which is uncomfortable when the casing is touched. A clutch means between the resistance section and an unwinding section is achieved by a free wheel and is bulky. Furthermore, it is stated in such French reference that the shaft is mounted in a casing of the reel, and that the casing is secured to a firm support, e.g. to a rail on a wall where the level of the casing may be adjusted. The casing or a cover thereof thus has to be strong enough to absorb the tensioning force and the point of attachment of the casing on the firm support when the resistance reel is used. This means that the casing must have a sturdy design and the entire resistance reel will consequently be of a large volume.
SUMMARY OF THE INVENTION
It is an object of the present invention to provide a resistance reel for exercisers where the above disadvantages are avoided, and to provide a resistance reel where different components may be readily mounted and where components which are subjected to wear can readily be exchanged. The resulting resistance reel will generate no uncomfortably hot surfaces during use, its maintenance is simple and it can readily be adjusted to a desired resistance against unwinding.
According to the invention this is achieved by the provision of a resistance reel with an extraction section and a resistance section which are provided on a central pin with a two-piece cover. The central pin is a load carrying component which is to be attached at one end thereof to a stationary support. The two-piece cover will thus have no load carrying function and the design thereof need not consider its sturdiness. The extraction section, resistance section, a clutch means connecting them and the central pin have structural features that permit production of a resistance reel having small dimensions and an attractive appearance. According to the present invention, all parts of the resistance reel which require high accuracy with regard to surface quality and tolerances preferably are manufactured from steel, whereas remaining parts are manufactured from plastic. This results in a very low total weight of the resistance reel. The extractive band preferably consists of 100% polyester and thereby is strong and flexible.
BRIEF DESCRIPTION OF THE DRAWINGS
An embodiment of a resistance reel according to the invention will be disclosed in more detail below with reference to the accompanying drawings, wherein:
FIG. 1 is an axial section through the resistance reel with a wound-up extractive band;
FIG. 2a is an exploded perspective view of an extraction section of the resistance reel with a central pin thereof;
FIG. 2b is an elevation view of the extraction section with the wound-up extraction band in a front cover and without the central pin;
FIG. 2c is a plan view of a tensioning sleeve;
FIG. 3 is an exploded perspective view of a resistance section with the central pin; and
FIGS. 4, 5, and 6 a
REFERENCES:
patent: 518967 (1984-05-01), Poole
patent: 3764132 (1973-10-01), Hepburn
patent: 3929331 (1975-12-01), Beeding
patent: 3995853 (1976-12-01), Deluty
patent: 4114874 (1978-09-01), Mattila
patent: 4171832 (1979-11-01), Thompson
patent: 4484741 (1984-11-01), Bingisser
patent: 4625961 (1986-12-01), Brand
patent: 4779866 (1988-10-01), Marshall et al.
Apley Richard J.
Crosby D. F.
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