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US 2022/0047273 A1Published application
Windlass pen
OwnerDerek Parsons, Zhang Yanfenginventors
Life of this patent
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Abstract
A tourniquet includes windlass having a cavity and a writing instrument configured to be stored in the cavity. The writing instrument is retained in the cavity through a friction fit and without threads, such that a frictional force decreases as the writing instrument is removed from the cavity.
Claims20
A tourniquet to restrict a flow of blood in a limb, the tourniquet comprising:
- a strap for wrapping around a portion of a limb;
- a windlass for tightening the strap around the portion of the limb to suppress blood flow to and from that limb, the windlass having a cavity having an inner diameter and an interior wall;
- and
- a writing instrument adapted to be secured in part in the windlass cavity without threads, the writing instrument including:
- a shaft for containing a marking substance;
- a head, attached to the shaft, the head comprising
- a friction fit portion, the friction fit portion providing a non-localized friction fit with the inner wall of the windlass cavity;
- a standoff portion;
- and
- an end portion, separated from the end of the windlass by the standoff portion when the writing instrument is inserted into the windlass cavity, the end portion including a knurled surface for facilitating grip by a user to overcome the friction and remove the writing instrument from the windlass.
7 more elements
A pen for inserting into a tourniquet windlass, comprising:
- a shaft for containing a marking substance;
- a head, attached to the shaft, the head comprising a friction fit portion, the friction fit portion providing a non-localized friction fit with the inner wall of the windlass cavity;
- a standoff portion;
- and
- an end portion, separated when the writing instrument is inserted into the windlass cavity from the end of the windlass by the standoff portion when the writing instrument is inserted into the windlass, the end portion including a knurled edge for facilitating grip by a user to overcome the friction and remove the writing instrument from the withdraw.
2 more elements
A method of employing a tourniquet, comprising:
- providing a tourniquet having a writing implement
- wrapping the tourniquet around a limb;
- tightening the tourniquet using a windlass;
- securing the windlass to prevent it from unwinding;
- withdrawing a writing instrument from the end of the windlass by applying a force that decreases over a distance of at least 3 mm as the writing instrument is withdrawn from the windlass;
- writing the time that the tourniquet was applied to the limb on a portion of the tourniquet or elsewhere, in which withdrawing the writing instrument from the end of the windlass does not include unscrewing the writing instrument from threads in the windlass.
3 more elements
Dependencies are inferred from the claim text.