US3154098A - Fluid transfer device - Google Patents

Description

Oct. 27, 1964 P. N. BLAND 3,154,098

FLUID TRANSFER DEVICE Filed March 19, 1962 2 Sheets-Sheet 1 I N It") In [J lnln IDN'O m (1) ID l0 uvvenfroR PERCY. N- BLAND 5,, 5 6

P. N. BLAND FLUID TRANSFER DEVICE 2 Sheets-Sheet 2 Filed March 19, 1962 United States Patent 3,154,098 FLUID TRANSFER DEVICE Percy N. Bland, Vancouver, British Columbia, Canada, assignor, by mesne assignments, to The Black Clawson Company, Hamilton, Ohio, a corporation of Ohio Filed Mar. 19, 1962, Ser. No. 180,710 4 Claims. ((11. 13758il) This invention relates to a device which is particularly adapted for use in transferring a gas or a liquid between the relatively moving parts of a machine such as a log barker or the like.

The objects of the invention are to provide means whereby fluid, for example, may be effectively transferred with little or no loss of pressure, to provide positive control of the fluid as it moves from the stationary to the moving part so that the fluid utilizing elements of the machine may be precisely controlled from a remote .point and so that the transfer takes place without undue noise or excessive area contacts which are extremely difficult and costly to maintain.

Referring to the drawings:

FIGURE 1 is a fragmentary front elevation of the invention.

FIGURE 2 is a section taken on line 22 of FIG- URE 1.

FIGURE 3 is an elevation of the pick-up ring.

FIGURE 4 is a section taken on line 44 of FIG- URE 1.

FIGURE 5 is a section taken on line 5-5 of FIG- URE 1.

FIGURE 6 is an elevation of the inner faces of the shoes.

FIGURE 7 is a diagrammatic view showing the device in use on a log barker.

In the drawings like characters of reference indicate corresponding parts in each figure.

The numeral 10 indicates a portion of the annular rotor of a mechanical log barker and 11 identifies part of the stator in which the rotor is journalled. A barker of the type strips bark from a log being conveyed end wise through the rotor and for this purpose the rotor is fitted around its inner periphery with a number of suitably spaced bark engaging tools 12, see FIGURE 7 only.

The tools 12 are moved towards and away from the surface of the log by means of pneumatic cylinders 15 and preferably said cylinders are provided with circuits which include a pressure tank 16, a distributing valve 17 and a pilot valve 18. These elements, together with the cylinders 15, are mounted on the rotor 10 and are rotated therewith about the surface of the log in the direction of the arrow 19 of FIGURE 1. Air is supplied to the several pneumatics from a pressure source 20 and air flow is controlled by a remotely situated valve 21 which is actuated by the barker operator. The transfer of air from the stationary to the rotating parts of the barker both for power and control, are effected by means which form the basis of the present invention.

Secured to a face of the rotor 10 by bolts 24, is a vertically disposed concentric pick-up ring 25 having an inner face 26 and parallel bearing faces 27 and 28. The ring is drilled from the face 26 and the face 27 to provide a plurality of ports 30 which are equidistantly spaced about the ring circumference and are located on a line 31, see FIGURE 3. Each port 30 is fitted with a suitable check valve 32 enclosed within a housing 33 which projects radially from the inner face 26. Extending parallel to the face 26 is a conduit 35 which connects each check valve housing 33 to the air tank 16. Air from the tank 16 is admitted to the several cylinders 15 by the distributing valve 17.

The face 28 of the pick-up ring has a number of spaced ports 37 located on a line 38 and said face also has similarly arranged ports 39 on line 40. As shown in FIGURE 3, the lines 38 and 40 are disposed on either side of the line 31 of ports 30 so as to extend parallel thereo. The ports 37 and 39 each have a right angle bend as shown in FIGURE 5 and extend through to the inner face 26 of the pick-up ring. A fitting 41 is entered into each port 37 from the face 26 and secured to said fitting is a check valve 42. The valves 42 are connected by conduits 43 .to the valves 17 and 18 on the barker rotor. The ports 33 are similarly provided with fittings 45, check valves 46 and conduits 47 whereby to connect said ports to the valve 18 only.

The stator 11 is fitted with an outwardly projecting bracket 50 in which a pair of vertically disposed pivot pins 51 are supported. Mounted on the pins 51 for limited swinging movement in a horizontal plane, are arms 52 which are provided at their free ends with vertical hinge pins 53. The arms 52 serve to support arcuate shoes 55 and 56 in sliding engagement with the pick-up ring bearing faces 27 and 28 respectively.

The hinge pins 53 extend through vertically spaced lugs 53 on the outer faces of the shoes, thus the shoes are rockingly mounted to compensate for any slight irregularity or Wobble in the ring 25. Adjacent the pins 53 the arms 52 are adjustably connected by a clamping bolt 59.

As best shown in FIGURE 6 the inner face 61 of the shoe 55 has a centrally disposed arcuate groove 62. The corresponding face 63 of the shoe 56 has parallel grooves 64 and both shoes have, at their lower ends, recesses 66 in which vent openings 67 are provided. Bonded to the faces 61 and 63 of the shoes are wear plates 69 of nylon plastic or other suitable material which plates obviously have openings corresponding to the various grooves and recesses.

Secured to the shoe 55 is a fitting 70 which connects a flexible hose 71 to the groove 62. The hose 71 extends to the source 20 of air pressure. Similar fittings 74 carried by the shoe 56 connect flexible hoses 75 to the grooves 64. The hoses 75 extend to the valve 21 and preferably the fittings 74 are spaced apart vertically on the shoe as shown in FIGURE 1.

During the log debarking operation the rotor 10 is driven at a constant speed and the ring 25 slides between the shoes 55 and 56 which are clamped thereto with sufficient force to form a substantially airtight seal between the engaging faces. The ports 30 progressively move into and out of register with the groove 62 and the ad joining recess 66 as the pick-up ring is rotated. Similarly the ports 37 and 39 sweep past the grooves 64 and the recess in the shoe 56.

When the ports 30 are in registration with the groove 62, their check valves 32 are forced open to admit air under pressure to the conduit 35 for delivery to the tank 16. This air pressure serves to actually operate the air cylinders 15 of the bark removing tools 12.

The normal position of the control valve 21 is such as to deliver air to the inner groove 64 and this air is picked up by the ports 37 and is applied to one side of the pilot valve 18 to normally hold said valve closed. By manipulation of the valve 21 the barker operator feeds air under pressure to the outer groove 64 and as the ports 39 traverse the charged groove their check valves are forced open to admit air to the conduits leading to the other side of the pilot valve 18. Through the valve 18, the valve 17 is actuated to deliver operating air from the tank 16 to the appropriate end of the cylinders 15 thus controlling the operation of the tools 12.

When the ports pass beyond the ends of the grooves, the check valves automatically close to prevent escape of air from the conduits. At this time a small amount of air is trapped in the ports between the closed check valves and the bearing faces and this air is discharged into the recesses 66 and reaches the atmosphere through the vent openings 67. It has been found that by releasing the trapped air in this manner disengagement between the shoes and the ports will take place without a series of explosive sounds or the setting up of vibrations in the fluid transfer device or the log barker.

What I claim is:

1. A fluid transfer device comprising a rotating ring having bearing faces, said ring having a plurality of circumferentially spaced ports extending therethrough, a pair of stationary shoes having opposing inner faces, means positively clamping said shoes to the ring with their inner faces in sliding and fluid-sealing engagement with the bearing faces of the ring, said inner faces of the pair of shoes having arcuate grooves adapted to be swept by the ring ports, some of said ports and the arcuate groove of one of said pair of shoes forming part of a first fluid circuit and the other of said ports and the arcuate 20 2,918,938

i groove of the other of said pair of shoes being included in a second fluid circuit.

2. A fluid transfer device as claimed in claim 1, Wherein the inner face of each of said pair of shoes has an enlarged recess disposed in the path of the ring ports and being in register therewith as said ports sweep out of register with the arcuate groove, said shoe having a vent communicating with the recess.

3. A fluid transfer device as claimed in claim 1, and means for preventing fluid flow in one direction through each of the ring ports.

4. A fluid transfer device as claimed in claim 1, and a wear member secured to the inner face of each of said pair of shoes.

References Cited in the file of this patent UNITED STATES PATENTS 2,294,214 Seinfeld Aug. 25, 1942 Kimball Dec. 29, 1959

Claims (1)

1. A FLUID TRANSFER DEVICE COMPRISING A ROTATING RING HAVING BEARING FACES, SAID RING HAVING A PLURALITY OF CIRCUMFERENTIALLY SPACED PORTS EXTENDING THERETHROUGH, A PAIR OF STATIONARY SHOES HAVING OPPOSING INNER FACES, MEANS POSITIVELY CLAMPING SAID SHOES TO THE RING WITH THEIR INNER FACES IN SLIDING AND FLUID-SEALING ENGAGEMENT WITH THE BEARING FACES OF THE RING, SAID INNER FACES OF THE PAIR OF SHOES HAVING ARCUATE GROOVES ADAPTED TO BE SWEPT BY THE RING PORTS, SOME OF SAID PORTS AND THE ARCUATE GROOVE OF ONE OF SAID PAIR OF SHOES FORMING PART OF A FIRST FLUID CIRCUIT AND THE OTHER OF SAID PORTS AND THE ARCUATE GROOVE OF THE OTHER OF SAID PAIR OF SHOES BEING INCLUDED IN A SECOND FLUID CIRCUIT.

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