US 1963576 A
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June 19, 1934. J, BOERLAGE I 1,963,576
PISTON FLUID PULSATOR WITH HAND CONTROLLED VALVE Filed 001;. 23, 1930 Patented June 19, 1934 PATENT "OFFICE PISTON FLUID PUIJSATOR WITH HAND- CONTROLLED VALVES J ohann Boerlage, Wiesbaden, Germany Application October 23, 1930, Serial No. 490,655 In Germany. July 11, 1929 1 Claim.
. forcing medicaments into the body in a certain mist form, at the same time with the massage;
The known pulsators of this type are driven by hand or motor power and either possess coacting pressure. and suction valves operated automatically by the vacuum or pressure in the pulsator or during the moving of the piston, or hand,
adjustable valves enabling only a shutting off or throttling of the pulsator.
. According to the invention two ports extending through the cylinder walls are employed with such single acting pulsators for medical purposes with hand adjustable valves connected to the channels, one port being arranged directly in front of the surface of the piston towards the 2 suction chamber when the piston is in its extreme suction position and the second port directly in front of the surface of the head of the other end.
It is possible by this arrangement of the pulsator, to produce, according to the desired heal- 0 ing purpose, both pressure impulses and also suction impulses in uninterrupted succession separately and also alternately. Moreover it is possible according to the invention, to always'regulate the pressure and suction impulses -to a very 5 line degree, as regards output and strength.
These pressure and suction impulses may, ac-
cording to the invention, be produced and regulated by adjusting the valves between the individual piston strokes and also the peculiar vibrating effects produced, when, in the case of high speed for example motor driven pulsators, the valves are differently or suitably set or adjusted according to requirements and the desired effect whilst the pulsator is running. The arirangement of adjustable ports in the cylinder wall in the path traversed by the piston in the cylinder causes this effect.
The operation of the pulsator according to the invention and its advantages over ordinary sucin section and the piston in the extreme pressure position.
Fig. 2 is a similar view, showing the, piston in extreme suction position. I
Fig. 3 shows a top plan view of the air pulsator with external hand adjustable valves.
In the drawing It represents the handle, which is hingedly connected at i to the piston rod h and oscillatable around the pivot Z, that is, it is situated in front of the piston eywhen this piston' is in its extreme pressure position as illustrated in" Fig. 1. The valve s controls the connection 'between the pulsator and the cup 1'.
The operation, due to the valve if, being situated with its cylinder port w, according to Fig. 2 di-' vrec'tly in front of the-cylinder head y and the valve t2 with its cylinder port 102 directly in front of the piston face when the piston e assumes the extreme suction position as shown in Fig. 2, is as follows:--
(1) By closing both valves t1 and t2 the air flows between the bell r and the piston e in the cylinder d andin the connecting tube can be accelerated alternatelyin opposite directions with the aid of the pistons reciprocated at any desired speed. Thus, positive and negative pressure impulses are produced under the bell r and can act as pressure and vacuum as in the known massage pulsators. In these known massage pulsators the efficiency of the massage depends, on the one hand, upon the speed of pumping or on the speed of the rotation of the motor and, on the other hand, upon the adjustment of the cock s, which serves for regulating the efficiency. This known effect of the massage pulsators can also be obtained with the apparatus according to the invention, when both valves t1 and t2 are closed as the air behind the piston e can always escape and flow in through the guide m, and as only the surface a of the piston e produces the pressure and suction impulses in the bell 1'.
(2) By completely closing the valves t1 and t2, illustrated in Fig. 3, and consequently the cylinder ports an and wz duringthe suction stroke,a succession of strong suctionstrokes can be obtained, according to the invention, by hand adjustment between each stroke, without any intermediate pressure strokes, if at the termination of a suction stroke the valve 731 is open and air allowed to enter slowly through the port wt in the cylinder wall for equilibrating or removing the vacuum. At the same time the piston 6 must also be moved back-into the suction position according to Fig. 1, when the valve t1 and consequently the port w are closed, the air in the cylinder it being forced the cylinder 11 and under the bell r.
out through the port wi. If the point to be massaged is very sensitive to pressure, owing to inflammation or other causes, and must be protected against pressure, the cock s is closed before returning the piston e and again opened, when the piston has reached the position illustrated in Fig. 1, after which a fresh suction stroke can be performed. For determining the strength and intensity of the suction impulse, the piston e can be drawn any desired distance into the cylinder d by means of the handle k: for producing the vacuum.
(3) It is also possible to exert pressure impulses of any desired strength and intensity on the portion of the body to be treated without intermediate suction impulses, if the two valves t1 and t2, illustrated in Fig. 3, are maintained closed during the time, in which the piston 6, according to the position shown in Fig. 2, is pushed into the cylinder at any desired speed and to any desired distance with the aid of the hande k. Before pulling back the piston e the valve M can be opened and the cock 5' closed so as to prevent a vacuum being produced under the bell 1' during the return movement of the piston 6, so that any desired sequence of only pressure stroke impulses is possible.
(4) It is also possible, by suitably controlling the working parts as described under 2 and 3, to produce alternately pressure and suction impulses of any desired and varying strength and intensity, which is necessary in many instances. When effecting the suction stroke more or less air always enters the cylinder through the valve t1 and leaves same during the pressure stroke. By suitably adjusting the valve 151 between andduring the pressure and suction strokes, the suction stroke or the pressure stroke can be made weaker.
(5) By closing the valve 251 and opening the valve 152, strong pressures and suction strokes can be imparted successively, because at the end of the suction stroke the surface a of the piston 42* in the position according to Fig. 2 draws in air through the port 1122 of the open valve and each time more or less relieves the vacuum produced in The effect of these alternating pressure and suction impulses is entirely different to the action of the pulsator as described under 1, wherein the two valves t1 and t2 are closed. By suitably adjusting the valve t2 in conjunction with the speed of movement of the piston e or of the motor drive, a very accurate adjustment of the strength and intensity of the pressure and suction strokes is attained so that, by suitably adjusting the valve t2 during the working of the pulsator or between the individual strokes, the physician can produce a very fine adjustment of the pulsator effect and consequently of the vibration effect.
(6) By opening the two valves t1 and t2 the suction strokes can be rendered practically ineffective, and by occasionally closing the valve t1 the pressure impulses can be made as effective as desired.
(7) It is not necessary, as assumed under 6, to adjust the valves t1 and t2, especially the valve t1 between each suction and pressure stroke, but with a little practice it is possible, especially with a motor driven pulsator, to regulate and adjust the massage effect or the production of suction and pressure impulses by adjusting the valves t1 and t2 whilst the pulsator is running, so that very peculiar vibration effects are produced.
A single acting pulsator for medical purposes, comprising in combination a cylinder having two ports, a head on one end of said cylinder having a port, a cover on the other end of said cylinder, a piston adapted to be reciprocated in said cylinder, one of the ports in said cylinder being arranged in the cylinder wall at a distance from said piston cover equal to the thickness of said cylinder and the second port in said cylinder wall directly adjacent said cylinder head, meansv for reciprocating said piston in said cylinder, two
hand controlled valves one arranged in each port of said cylinder, and a controlled valve in the port inv said cylinder head, said valves adapted, according to their setting, to control the pulsator to impart suction or alternately suction and pressure impulses.