Boring or penetrating the earth – Boring without earth removal
Patent
1990-12-11
1992-07-28
Bui, Thuy M.
Boring or penetrating the earth
Boring without earth removal
175323, E21B 400
Patent
active
051334160
DESCRIPTION:
BRIEF SUMMARY
FIELD OF THE INVENTION
The present invention relates to the field of construction and in particular to a device for drilling holes in the ground which is widely used in laying of underground service lines under roads and runways of airfields without excavation of trenches, in organization of a closed drainage within the premises of plants, mines, etc., without damaging the pavements, and also in conduct of other similar work in various branches of economy.
BACKGROUND OF THE INVENTION
At present, various devices are used for drilling holes in the ground (cf. SU, A, No. 239, 132), each device comprises a body, a drive for moving the device, a base member screwed to the body. Used as a drive for moving the device are various mechanisms including an impact type pneumatic mechanism whose striker moves in space under pressure of a working agent supplied through a distributing mechanism and a hose held in the body in the preset position with the aid of the base member, a nut, for example.
The main disadvantage of such devices is characterized in that in operation the base member gets self-unscrewed under action of impact and vibration loads from the impact mechanism and due to friction of the base member side surface against the ground. As a result, the base member may be lost or tightness of the impact mechanism may be disturbed.
There are also known similar in design devices for drilling holes in the ground (for example, "Reversible Air Drift -4603A", 1986, Kiev, "Reklama", page 6, FIGS. 2, 3) in which a means for locking the base member relative to the body in order to protect the base member from self-unscrewing in the process of operation is made in the form of conical sections located both on the base member and the body. However, such a design of the locking means is not reliable. In the main the explanation consists in that due to the vibration and impact effect of the impact mechanism on the base member and as a result of friction of the base member side surface against the ground, the base member may be either self-unscrewed or screwed into the body. In the latter case the body may be broken in the point of conical joint or the base member may get stuck which will upset the operation of the whole device and hinder its maintenance.
SUMMARY OF THE INVENTION
The present invention aims at providing a device for drilling holes in the ground having a means for locking a base member relative to the body which would prevent inadvertent unscrewing or jamming it in the body making it possible to increase the reliability and extend the service life of the device.
The aim of the invention is accomplished by a device for drilling holes in the ground comprising a body, a drive, a base member screwed to the body, and a means for locking the base member relative to the body, according to the present invention, the means for locking the base member is located on its side surface, projects beyond the body and is made in the form of a lug with one of its sides inclined to the base member side surface generatrix in the direction creating a turning-in moment at the connecting thread.
Due to such a design the projecting part of the locking means cuts into the ground during operation of the device and the resistance reaction of the ground creates a turning-in moment at the connecting thread of the base member thus providing for its constant connection with the body and, consequently, for a troublefree operation of the device. Besides, due to the inclination of the side of the lug to the base member side surface generatrix a directional reaction of the ground is created at the lug. This reaction is necessary for creation of a turning-in moment coincident with the efforts created in mounting the base member in the body which makes the self-unscrewing of the threaded joint impossible.
In accordance with an embodiment of the invention the locking means of the base member is provided with an additional lug located on the base member outer side surface behind the main lug in the direction of the device movement and made simi
REFERENCES:
patent: 1188982 (1916-06-01), Nebergall
patent: 2579720 (1951-12-01), Atkinson
patent: 3125173 (1964-03-01), Fox
patent: 3794128 (1974-02-01), Gagen et al.
patent: 4100979 (1978-07-01), Schmidt
patent: 4632191 (1986-12-01), McDonald et al.
patent: 4785898 (1988-11-01), Kostylev et al.
Kamensky, "Pnevmaticheski mashiny udarnago deistvia dlya prokhodki skvazhin i shpurov", 1986, p. 169.
Dobroselsky Petr V.
Nikolaev Igor V.
LandOfFree
Device for drilling holes in the ground does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Device for drilling holes in the ground, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Device for drilling holes in the ground will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1682683