Joints and connections – Rotarily connected – differentially translatable members,...
Patent
1984-08-06
1986-06-10
Husar, Cornelius J.
Joints and connections
Rotarily connected, differentially translatable members,...
403 46, 403 60, 403 78, F16G 1112
Patent
active
045940185
DESCRIPTION:
BRIEF SUMMARY
CROSS REFERENCE TO RELATED APPLICATION(S)
This U.S. application stems from PCT International Application No. PCT/SE83/00431 filed Dec. 7, 1983.
The present invention relates to a turnbuckle of the kind comprising a first and a second fixing member arranged at opposite ends of a sleeve, which is rotatable, at which the turnbuckle can be extended or shortened, said sleeve along a substantial part of its length being provided with nut threads, designed for cooperation with corresponding screw threads at a pin arranged at one end of said first fixing member, the length of said pin being considerably shorter than the length of the nut threads of the sleeve, and at the opposite end of the sleeve inside it there is arranged a seat for the second fixing member which extends through said end portion and which is designed as a swivel.
BACKGROUND OF THE INVENTION
Turnbuckles such as cable stretches, rig stretchers etc are known in many different designs. The most common occuring turnbuckle consists of a left-threaded and a right-hreaded screw, threaded into a rotatable sleeve. By rotating the sleeve, the turnbuckle is extended or shortended. This and similar types of stretchers or tighteners show a number of disadvantages. Thus the threads of the turnbuckle is mostly uncovered and exposed for weather and wind, at which corrosion attack and locking-up caused thereof may result. The uncovered threads also results in that wires, canvas etc. can be torn by contacting the turnbuckle. It is very easy to turn such a turnbuckle incorrectly, i.e. upside down, so that by rotating the sleeve to the right, the screws can come loose from the sleeve and serious damages may result, if the turnbuckle for example guys a mast to a boat.
In order that the turnbuckle should not be opened unintentially, it is necessary to lock it, which generally must be done with split pins or the like, which also provides projecting sharp details, which not only can cause damages but may also be easily lost.
In order to protect ropes and sails from wear when contacting the turnbuckle it is also previously known to use a plastic turnbuckle protector, which is locked up around the turnbuckle. The protector provides a complication and is not particularly effective either, so they are easily loosened when a line is pulled around such a protector.
Especially if the turnbuckle is used on ships and boats there is a great risk that the different parts by corrosive action cling to each other, not only the threads but also the swivel. As the turnbuckle must be able to transfer relatively great traction it is often made of stainless steel, which however is without lubricating characteristics and after continuous loading the above mentioned disadvantages appears.
THE OBJECT OF THE INVENTION AND ITS MOST IMPORTANT FEATURES
The object of the present invenion is to provide a turnbuckle which on the outside is completely flat independent of the threaded position of the turnbuckle parts relative to each other. Another object is to provide a simple construction, which is easy to adjust which cannot be turned incorrectly, which by rotating the sleeve in right hand helice always provides a shortening of the turnbuckle and which is capable to withstand hard external stresses without that the threads are damaged. Another object is to provide a turnbuckle which also in very corrosive atmospheres and after prolonged loading is essentially mobile as a new turnbuckle. A desire is also that it should be possible to use the turnbuckle for different purposes and be able to replace a wire attachment for a schackle attachment without missing the other advantages. These objects have been solved by the fact that the second fixing member comprises a shank which at one end portion is designed with an axial internally threaded recess for a screw, the screw head of which is designed with a bearing surface corresponding to said seat, that the screw is non-rotatably connected to the shank, which with its end portion remote from the screw is designed alternatively with an attachment e
REFERENCES:
patent: 1002001 (1911-08-01), Short
patent: 1003355 (1911-09-01), Green
patent: 2318119 (1943-05-01), Westhaver
patent: 2420363 (1947-05-01), Kspenas
patent: 2851294 (1958-09-01), Mount
patent: 2903283 (1959-09-01), Sweetland
patent: 3163079 (1964-12-01), Schertz
patent: 3270494 (1966-09-01), Holmes
patent: 4195798 (1980-04-01), Costantino et al.
Larsson Goran
Sundman Peter
Husar Cornelius J.
Riggarna Sundman, Larsson & Josefsson AB
Williams Todd G.
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