JPH02193668A - Operating and/or diagnosing table - Google Patents

Abstract

PURPOSE: To provide a table for medical operation and/or examination, which is operated accurately and makes the table top part to respond better by installing a valve device having a rotating valve element that enables to control whole table top by one hand. CONSTITUTION: Sub-systems, each of them are improved, are provided to the total system of an operation and/or observation table. One of them is a control device to control selectively the flow of fluid to plural cylinder/piston units 14, 15, 16, 17 and 18, which are independent from fluid pumps driving liquid to one or the other way by compressing the piston in each cylinder. A control valve device has a detention device to keep a valve part 63 releasable when the valve part 63 is turned against a valve block. Also, each of the cylinder/ piston units 14, 15, 16, 17 and 18 is equipped with a detention valve of 106 to 110 to lock the piston position for controlling the flow of the fluid in the units and for an occasion of the device is in breakdown.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates generally to operating tables and/or examination tables (examination tables), and more particularly to the invention. Concerning new and significant improvements to such platforms by incorporating new subsystems.

[Conventional technology]

Previously disclosed surgical tables and their accessories, as well as the subsystems utilized to perform specific functions of the surgical table, are rather expensive. Most of the devices disclosed in prior art patents are complex, highly inefficient, expensive to use and manufacture, and susceptible to inadvertent failure of one or more parts. Requires mechanical mechanisms or hydraulic devices that are unsafe for handling or failure. Some prior art devices have no external power source that makes them unsuitable for use during power outages or in areas such as those used by Matusch (Army Mobile Surgical Hospital) organizations. I need.

In the prior art, U.S. Pat. No. 4,061,324 discloses a pneumatic system for articulating and controlling a relatively simple patient support having a main patient support and an axle. An actuating device is disclosed. This pneumatically actuated device, for operating a single support, has main valves and air motors arranged in a complex manner to obtain the desired results. Although this device tolerates small air leaks, no consideration is given to large air leaks and failure of parts of the device.

U.S. Pat. No. 3,241,828 discloses a table comprising a plurality of table sections, all of which are positionally controlled separately.
A more conventional operating table is disclosed. However, a complete power source and its control equipment to perform all the disclosed ranges of movement of the various platform sections is very expensive and complex. This power supply and its control unit combine -1 complex mechanical and hydraulic subsystems with -the use of an electric motor as a secondary power source. It is well known that the use of electricity to operate operating table equipment is dangerous as it can generate sparks and overheat while working on the patient during surgery. . In any case, the disclosed operating table device is not a self-contained device, ie an external power source is required.

Another rather sophisticated control system for a patient support platform having three or more platform sections is disclosed in U.S. Pat. No. 3,977.864. In this disclosed patent, five slidable spool valve members and a combined valve block are disclosed to establish articulation of the table portion. To balance complexity and cost, a number of check and lock valves are combined with the hydraulic lines to control their articulation.

US Pat. No. 3.89ei, 704 describes an operating table with five independently hydraulically controlled table sections by a single valve actuation unit. This valve actuation unit uses a valve element that is actually movable to move a piston within the actuation cylinder in one direction or the other and rotatable to selectively actuate the desired actuation cylinder. ing. Speed setting can be achieved by axially positioning the valve element to expose a predetermined area of the passageway of the valve unit. Although this valve actuation unit has a relatively simple construction, it is very inefficient both with respect to the selection of the actuation cylinder and the setting of its actuation speed. Inadvertent movement of the valve element by the control handle by the person using the operating table will adversely affect not only the part of the table used, but also the rate of movement of its articulation.

Another example of a single central valve unit is disclosed in U.S. Patent No. 4.
No. 012.031.

This valve unit uses a pilot-operated check valve in the main valve block, and the reversal speed in the direction of movement of the actuating cylinder operated by the valve unit in response to manual operation of the control handle of the valve unit is slow. Therefore, the operating efficiency is low.

Another operating table using electrical circuitry is disclosed in U.S. Patent No. 3.6.
No. 35,461, No. 4,101,120 and No. 4.1
It is disclosed in each specification of No. 68099. As previously mentioned, when using electrical circuits in the operating room environment,
The disadvantage is that the electrical contacts must be completely sealed due to the risk of explosion, and such precautions are rather expensive. Moreover, the use of such devices does not completely eliminate the risk of explosion, but only reduces it.

Conventional operating tables use various methods and devices to allow accessories to be placed in the vicinity of the operating table for use with a number of accessories. To this end, the surgical table disclosed in US Pat. No. 3,065,344 uses sight rails that are individually attached to specific table sections that make up the complete surgical table. however,
In this disclosed device, the sight rails of one platform section are not integrally constructed with the sight rails of another platform section, so that when the platform sections are arranged in a common plane, A relatively large space remains between adjacent ends of the sight rail. This equipment does not allow sight rails to carry accessories from one platform section to another, unless there is a requirement to remove the accessory from the sight rail of one platform section and reattach it to the sight rail of another platform section. It cannot be allowed to slide on the rails.

Most operating tables use some device to make the operating table movable, such as a pedestal with multiple leg rings, but the hydraulic pressure is applied unevenly to each leg ring. prevent that 1
1- No device is provided to prevent uneven movement of the pedestal, which will have a significant negative effect on the positioning of the elderly on the operating table.

In U.S. Pat. No. 4,225,125, a frame is constructed to support four casters and uses a single hydraulic unit to simultaneously move the casters vertically downwardly. It is necessary to. In this device, it is not guaranteed that all the casters are evenly driven into contact with the floor.

[Problem to be solved by the invention]

In view of the above-mentioned disadvantages and shortcomings of conventional examination tables, the main object of the present invention is to provide an integrated system which is itself an improvement over the corresponding subsystems of the prior art. Improving surgical and/or examination tables by incorporating subsystems that result in significantly more efficient surgical and/or examination tables that are easier to operate and maintain,6 and have relatively low manufacturing and processing costs. Our goal is to provide the following.

Another object of the invention is to improve the operating table by incorporating new subsystems and to provide a compact and simple structure for the operating table.

Another object of the invention is to improve the operating table by using a fluid control device that is easy to operate and has a valve control that always provides the correct pressure to the working cylinder of the table section for the operating table. It is in.

Yet another object of the invention is to incorporate a hydraulic system with a device for stopping and locking a fluid-controlled movable device in the event of a leak or a failure of a component.

Another object of the invention is to control the hydraulic system used to drive a plurality of cylinder/piston units by using a valve arrangement that always provides positive pressure during operation of the cylinder/piston units. The purpose is to improve the control device.

Another object of the invention is to improve a hydraulic pump for use with a double-acting cylinder/piston unit that is configured to continuously supply positive pressure in one direction during operation.

Another object of the invention is to improve the operating table by using a novel rotating piston pump adapted to provide unidirectional positive pressure to the actuating cylinder for the table section incorporated into the table. There is a particular thing.

Another object of the invention is to provide a rail configured to provide a continuous, uninterrupted surface for movement of accessories used with the platform when the platform sections are oriented in one common plane. The object of the present invention is to improve an operating table by using the same on both sides of the table part for the operating table.

Yet another object of the invention is to provide a drive for pushing the leg wheels down into contact with the floor on which the operating table is supported, in order to ensure that the table does not rock during the resulting movement of the leg wheels. The aim is to improve the operating table by using a new structure of the device.

[Means for Solving the Problems and Actions/Effects] In order to eliminate the disadvantages and shortcomings pointed out in the above explanation, the present invention not only improves a specific subsystem of the operating table but also improves the structure. It has been devised to incorporate novel design features that are integrated to provide an operating table that can perform at maximum efficiency without sacrificing simplicity or ease of operation. be.

The foregoing objects and other objects that will become apparent from the following description are the object of the present invention to provide a novel and simplified system for use by medical technicians having novel and simplified subsystems integrally associated with a highly efficient modular system for use by medical technicians. This can be accomplished with improved hydraulically operated surgical and/or examination tables.

The surgical and/or examination table includes a simplified control device for selectively articulating each of the table sections by means of a cylinder/piston unit. The control device includes a novel valve arrangement with a rotary valve element that allows one-handed control of all platform sections. Pressurized fluid is supplied to the valving system from a novel rotary piston pump with a passageway and a check valve configured to unidirectionally supply constant pressure fluid to the valving system. This valve arrangement and rotary piston pump work together with an integrally constructed check valve in combination with the cylinder for the cylinder/piston unit, thereby ensuring even better responsiveness and precise operation of the platform part. do. Each of the table sections is provided with rails on both sides thereof, and each of the rails is pivotally connected to a novel pivoting device for setting one platform section in any position relative to another. , the entire pivot range can be obtained without any problems. The invention is also adapted to use a control device for pressurizing a cylinder/piston unit combined with a caster used to enable movement of the operating table on the operating room floor. . This control device depressurizes the cylinder/piston unit and
As a result, when the patient shifts his/her weight on the table, the patient's weight is shifted without unevenly rocking the table and without causing discomfort to the patient supported on the table. It is designed to improve the overall efficiency of the stand.

According to the invention, in order to achieve the above-mentioned effects, in addition to the total system of the surgical and/or examination table, individual improved subsystems are also provided. One of them is
A control device that selectively controls the flow of fluid to a plurality of cylinder/piston units independently from a fluid pump that pressurizes a piston inside each cylinder and drives it in one direction, and this control device includes: a plurality of valve ports having a cylindrical valve chamber and communicating with said valve chamber associated with each of said cylinder/piston units and configured to fluidly cooperate with the cylinder by means of a plurality of adjacent valve ports; a valve block having an inlet connected to an outlet of the pump; and a cylindrical valve rotatably mounted within the valve chamber for movement into an operating position relative to each of the cylinder/piston units. a member, the valve member having, in each of its operative positions, one of the adjacent valve ports connected to one side of the piston of a unit and the inlet connected to the other side of the piston of that unit. side by which the respective piston is driven in one direction, and in another operating position connects the other of said adjacent valve ports with the other side of said piston and connects said inlet to said piston's side. It is characterized in that a passage is formed which is connected to one side and arranged so that the piston is driven in the other direction. In a preferred embodiment, the control valve arrangement includes a detent device for releasably retaining the valve member during rotation of the valve member relative to the valve block. Each cylinder/piston unit is also equipped with a check valve configured to control the flow of fluid therein and to lock the position of the piston in the event of device failure.

Moreover, one of the other novel subsystems according to the present invention is
A hydraulic pump that generates continuous fluid pressure against a double-acting cylinder/piston unit consisting of four cylindrical chambers arranged radially with their respective axes perpendicular to each other. a pump housing having an outlet opening connected to the cylinder/piston unit; a piston slidably received within each of said chambers; a rotary drive member arranged to be continuously pushed into the piston and connected to act on the piston, each of the chambers being pressurized sequentially during continuous rotation of the rotary drive member. further comprising means for moving each of the pistons radially inward after outward movement, the housing being in communication with the chamber and the outlet during pressurization thereof, thereby causing the cylinder to / having interconnecting passageways for sequentially applying fluid pressure in one direction to the piston unit; a fluid discharge passage is formed for the purpose of the present invention, and further, the passage is arranged so as to apply the continuous fluid pressure in one direction to the discharge port while the driving member rotates in one direction; It is characterized by comprising a combined check valve device g.

Furthermore, with regard to the configuration of the individual table sections and rail members, the surgical and/or examination table of the present invention comprises a plurality of table sections that are pivotally connected together at their ends, the table sections being forming a continuous table top configured to be supported by an upper surface of said platform portions disposed in a common plane; a device associated with each of said platform portions for articulation independently of the other portions; and a device mounted on opposite sides of each of said platform portions, said upper surface of said platform portions being in said common plane; and elongated rail members configured to be respectively axially aligned when in position, the rail members having an upper surface configured to slidably support a platform accessory thereon. and further comprising a pivot device at an adjacent end of the rail member for pivotally connecting one rail member with an adjacent knob member during articulation of the rail member. characterized in that the pivot device has a top surface that is adjacent to the top surface of the connecting rail member, thereby forming a continuous, uninterrupted, coplanar rail surface along both sides of the platform.

Furthermore, regarding the leg structure of the pedestal, the surgical and/or examination table of the present invention in its aspect includes a pedestal configured to move on the floor, and a pedestal mounted on the pedestal so as to be vertically movable; and a pedestal connected to the base for supporting the base, the front base including a plurality of foot members disposed at the ends of each of the two bases of the foot members and keeping the base and the base constant. The foot members are configured to be placed on the floor for support in the operating position of the foot member, and the foot members are mounted on the base, one adjacent to each of the foot members, and are in contact with the floor, at least four leg wheels movably mounted so as to be moved out of contact with the foot member; and a driving force is transmitted to the leg wheels to bring the leg members into supporting contact with the floor. a device associated with each of said casters for moving out of the condition and releasing said driving force and returning said casters to a state of non-contact with the floor; A device combined with said drive force transmission device for transmitting a controlling force, said device comprising: a device for transmitting a controlling force, said force generated in one of said cylinder/piston units when a weight acts on a corresponding end of said pedestal; It is characterized in that it comprises a device for ensuring that the device is not released and thereby forces the leg wheels associated with said device into contact with the floor.

The subsystems of the present invention as described above can be used in combination or in combination as desired. Other subsystems according to the present invention, specific aspects of each subsystem, and combination configuration aspects thereof are as follows:
It will become clearer from the explanation below.

(Examples) Hereinafter, the present invention will be described in further detail while describing examples shown in the accompanying drawings.

One preferred embodiment of a surgical and/or examination table is shown in FIG. The base 1 has a roughly rectangular movable base 2 on which a pre-installed pedestal 3 is mounted. Patient support table 4
is connected to the uppermost end of the pedestal 3 by means of a device that allows longitudinal and lateral pivoting of the platform 1 relative to the base 2. The patient support or table top 4 is comprised of a load support section 5, a seat section 6 and a leg support section 7. Although the head stand part is not shown because it does not constitute a part of the present invention, it does not form part of the present invention.
or the back) can be removably applied to the outer end of the support part 5.

The table parts 5, 6 and 7 constituting the table top 4 are movable relative to each other, as in the case of a conventional operating table, so that the patient's body can be adjusted depending on the operation or examination to be carried out. The parts can be held in different positions. Therefore, as can be seen from FIGS. 1, 2 and 2a, the load supporting portion 5 is
It is pivotally connected to the adjacent end of the seat portion 6 by a link pivot joint 8. Similarly, the leg support part 7 is pivotally connected to the adjacent ends of the seat part 6 by U-link pivots 9 on either side thereof.

Each of the patient support parts 5, 6 and 7 (constituting the table top 4) is conventionally referred to as a load support part,
Although shown as a seat portion and a leg support portion, it will be appreciated that such portions may support other parts of the patient's body. A table top 4 is supported on the pedestal 3 by a frame 10. The frame 10 has a cover 11 surrounding it in order to seal off some of the mechanisms supported on the frame 10. The frame 10 includes a topmost member 1 of the pedestal 3 so as to be movable with the pedestal 3 during extension and retraction of the pedestal 3 in order to raise and lower the platform 1 to various operating positions.
It is pivotally fixed to 2. A detailed description of this pivot support member is provided below.

The pivotably interconnected platform parts 5, 6 and 7 each have a double-acting hydraulic cylinder fixed on the frame 10.
A subsystem comprising actuation of piston rams or units 14, 15 and 16 selectively articulated around respective interconnecting pivots 8 and 9. In addition, the entire table top 4 is equipped with a hydraulic cylinder/piston ram or unit 17 as part of the subsystem.
is tilted laterally along an axis parallel to its longitudinal axis by actuation of the Trendelenburg (Tr) by means of the cylinder/piston ram or unit 18.
endeIenburg) movement and a reverse Trendelenburg movement. Double acting cylinder/piston ram)17.
18 is also fixed on the frame 10.

As shown in FIGS. 3-7, the frame 10 supporting the table top 4 is constructed by interconnecting struts (not shown) in a parallel spaced relationship as shown in FIG. A frame member 20.21 is preferably connected to the frame member 20.21.

The uppermost end of the upper part 12 of the pedestal is closed off by a plate 22 fixed thereto. plate 23
is depending from the plate 22. A central opening 24 is formed in the plate 23 (see FIG. 6). A horizontally oriented pivot shaft 25 is rotatably supported in the opening 24 and supports a pivot yoke 26 . The short protruding shaft 27 is the pivot yoke 2
extending outwardly from each of the six yoke arms 28 and disposed in axial alignment. The short shaft 27 projects through a suitable opening formed in the frame member 20.21 and is secured against axial movement by suitable nuts fastened to cooperating screws formed at both ends of the short shaft.
) is locked.

Thereby, the lateral tilting movement of the frame 10 is performed by pivoting the pivot yoke 26 about the axis of the pivot shaft 25. This lateral tilting movement of the frame 10 is transmitted to the platform 1 by means of the pivot connection with the underside of the seat part 6 of the table top, resulting in a tilting of the platform 1. As shown in FIGS. 4 and 5, ears 29 hang down from both sides of the lower surface of the seat portion 6. As shown in FIGS. ear 2
9 is connected to the frame member 20.2 by means of a suitable pivot 30.
1 and is pivotally connected to 1.

Swinging of the pivot yoke 26 is performed by the cylinder/piston unit 17. Cylinder/piston unit 1
The cylinder 7 is connected to a depending arm 31 fixed to the pedestal portion 12, and its screw rod is pivotally connected to a depending arm 32 formed integrally with the yoke arm 28. Cylinder/piston unit 17
When actuated with fluid to move its piston in either direction, a corresponding pivoting of the pivot yoke 26 about an axis regulated by the pivot shaft 25 occurs. Actuation of the cylinder/piston unit 17 thus results in a tilting movement of the frame 10 in either direction, resulting in a corresponding tilting of the platform 1 about an axis parallel to the longitudinal axis of the platform 1. happens.

The platform 1 can also pivot about a transverse axis, commonly known as a Trendelenburg movement, and about an axis regulated by a short axis 27.

The main frame 10 is pivotably supported on the short axis 27, as described above. Such rotation in either direction to effect the Trendelenburg and counter-Trendelenburg movements is performed by the cylinder/piston unit 18. The cylinder of the cylinder/piston unit 18 is rotatably fixed to the frame member 21 and its piston rod 33 is pivotally connected to a rocker arm 34 fixed rotationally to the end of the adjacent short shaft 27. ing. When the cylinder/piston unit 18 is actuated in either direction, the fixed rocker arm 34 is mounted around the minor axis 27 by the main frame 10 in the form of an intermediate structure.
cause a pivoting motion in one direction.

As shown in FIGS. 3 and 4, articulation of the front support portion 5 in either direction is controlled by the cylinder/piston unit 1.
Caused by 4.

The cylinders of the cylinder/piston unit 14 are pivotally connected to the frame member 20, and one of its piston rods 35 is pivotally connected to a link 36 fixed to an axle 36a. The end of the shaft 38a is pivotally attached to the frame members 20 and 21. A pair of link assemblies 37-38 are provided. One end of the pair of links 37 is The link 38 is pivotally attached to one end of the pair of links 38. The free end of the link 37 is fixed to the shaft 36a. When the cylinder/piston unit 14 is actuated in either direction, the link 3
A corresponding rotation of 6 and articulation of the link assemblies 37-38 takes place, thereby rotating the front support part 5 about the pivot 8.

As shown in FIGS. 3 and 6, the articulation of the leg support part 7 with respect to the seat part 6 is effected by a cylinder/piston unit 16 and a rack and pinion arrangement 41-43 (see FIG. 6). Cylinder/piston unit 1
6 is rigidly connected to the underside of the seat part 6 and its piston rod 40 terminates in a gear rack 41.

The gear rack 41 drives a first pinion gear 42 and a second pinion gear 43 that meshes therewith. A second pinion gear 43 is fixed to a shaft 43a pivotally mounted within the housing 39 for the cylinder/piston unit 16, and a pair of link assemblies 44-45 are connected to the shaft 43a.
It is fixed to both ends of 3a. The free end of each link assembly is pivotally attached to one end of link 46. The free end of the link 46 is pivotally attached to a bracket 46a attached to the underside of the leg support part 7. Therefore, cylinder/piston unit 1
6 Actuation in either direction causes an upward or downward flexing movement of the leg support part 7 about the pivot 9.

The table 1 can also perform flexion and reverse (reverse flexion) articulations, i.e. a rotation of both the table parts, i.e. the front support part 5 and the seat part 6, about the pivot 8, as in the case of a conventional operating table. can. To perform this exercise,
The cylinder/piston unit 15 is adapted to transmit pivoting motion in either direction about a pivot point 50. A rocking arm 51 is fixed to the underside of the seat portion 6 in order to perform this pivoting movement. One of the arms of the swing arm 51 is pivotally connected to a piston rod 52 of the cylinder/piston unit 15 . The cylinders of cylinder/piston unit 15 are pivotally connected to frame member 21 . Actuation of the cylinder/piston unit 15 in either direction results in a corresponding pivoting movement of the seat part 6 and the front support part 5 about the pivot pin 8.

Selective actuation and control of the cylinder/piston units 14, 15. Full and complete control is provided by a subsystem including a selection valve arrangement 60 mounted at one end of the main frame 10 adjacent to the support section. The selection valve device 60 includes a valve block 61 having a cylindrical valve chamber 62 formed therein, and a rotatable valve member 63 mounted inside the valve chamber 62. Valve member 63 is rotatable in either direction relative to valve block 61.

As shown in FIG. 9, the valve member 63 has a circumferential groove 64 formed therein. Groove 64 communicates continuously with a passage 65 formed in valve block 61 and terminates in an inlet 66 for introducing pressurized fluid into valve arrangement 60. A pair of O-rings 67 are retained in suitable grooves formed in valve block 61 on either side of groove 64 to prevent fluid leakage from groove 64.

This circumferential groove 64 is in constant communication with a passageway 68 extending along the length of the valve member 63 parallel to and spaced from the longitudinal axis of the valve member 63 . This passageway 68 extends radially within the valve member 63 and when the valve member 83 is rotated, the plurality of radial passageways 7
0°71.72, 73, 74, 75, 76.77°78
and 79 (see FIG. 10). Each of the passages 70-79 has an outlet (valve port) 80, 81, 82, 83, 84, 85°8 disposed circumferentially around the valve block 61 in one common plane.
6.87.88 and 89 respectively. Passages 70-79 are oriented radially relative to the longitudinal axis of valve block 61 and valve member 63, as shown in FIG. Ten such passages are formed, each at an angle of 36° with respect to an adjacent passage.

5 working cylinder/piston units 14°15.1
6.17 and 18 each have two valve ports associated with the unit. These valve ports are adjacent to each other in this relationship. For example, valve port 80.
81 is connected by tubes 90° 91 to both sides of the piston of the cylinder 5/piston unit 18. Similarly, tubes 92,93 connect the valve bows 82, 83, respectively, to either side of the piston of the cylinder/piston unit 16. The cylinder/piston unit 17 for tilting is a tube 94
．． 95 is connected to the valve port 84.85, the cylinder/piston unit 14 for the front support is connected to the valve port 86.87 by a pipe 96.97, and the cylinder/piston unit 15 for the bending is connected to the valve port 84.85 by a pipe 98□ 99. is connected to valve port 8-8.89.

Furthermore, radial passages 101 and 102 are formed in the valve member 63. The passages 101, 102 are arranged together with the six passages in one common plane. The radial angular relationship between passages 101 and 102 is 72°, such that passage 69 is similar to passage 101, as shown in FIG.
and 102, and is connected to two of the passages 70 to 79. aisle 10
1. −． 102 are in communication with a passage 103 formed in the axial direction of the valve shaft 63. The passage 103 is the pipe 10
5, a fluid outlet 10 connected to a fluid reservoir to be described later.
4 (see Figure 9).

Cylinder/piston unit 15. 16. 17°1
4 and 18 each include a respective pair of pilot operated check valves 1 within the body of the cylinder associated therewith.
06, 107, 108, 109 and 110 (see Figure 1). These check valves act in opposite directions, and each must be pressurized to open, which causes the respective piston to either open or close due to the pressure introduced on either side of the piston. The other side of the piston is not pressurized and is configured to allow fluid to be discharged back to the selection valve arrangement 60, as described below.

An operating end shaft for the valve member 63 projects outside the cover 11 of the main frame 1° (see FIG. 9).

This working end shaft terminates in a manually operable knob]15. A dial 115 is fixed to the knob 115. Dial 116 is imprinted with various articulations of the table top of the operating table that selection valve device 60 can control. As shown in FIG. 12, the dial 1113 is imprinted with various articulation movements that can be set by the operator and performed by the action of the cylinder/piston units 14, 15, 16, 17 and 180.

As mentioned above, the cylinder/piston unit) 14.1
5, 16, 17 and 18 each have an adjacent valve outlet;
That is, 80 and 81 for units 1 and August, 82883 for unit 16, 84.85 for unit 17, 86.87 for unit 14, and 88.89 for unit 15. There is. For example, the Trendelenburg movement cylinder/piston unit 18 is connected to the adjacent valve port 80.81, and as shown in FIG. It shows the relationship,
and is used to actuate the piston of the cylinder/piston unit 18 in either direction. 9th
Each portion of the selection valve device 60, shown L7, is configured to actuate the Trendelenburg cylinder/piston unit 18. In this configuration, the pressurizing passage 6
9 supplies fluid via an outlet 80 and thus a conduit 90 to the left side of the piston of the cylinder/piston unit 18 . This fluid pressure is allowed to act on the piston by a pair of check valves 110, moving the piston to the right, one of the check valves 110 being pressurized open and causing the cylinder on that side of the piston to move. is pressurized. The fluid in the cylinder section on the right side of the piston is discharged through the other of the set of check valves 110 and through conduit 91 because conduit 90 pressurizes one of the sets of check valves 110 . conduit 91
The fluid discharged through is returned to the selection valve device 60,
And passage 71. lot and 103 to the outlet 104, and finally returns to the fluid reservoir 120 via the pipe 105.

It will be noticed that the passage 102 is also connected via the tube 98 to the cylinder/piston unit 15 and to the discharge tube 105. However, since the piston of the cylinder/piston unit 15 is not actuated, the opposing pilot operated check valve 106 is not pressurized to open. In order to reverse the action of the Trendelenburg unit 18, i.e. to move the piston to the left by pressurizing the rear side of the piston, the knob 115 is manually operated 36'' to the left to apply pressure. Passage 69 is placed in communication with passage 71. This actuation supplies fluid pressure to outlet 81 and pressurizes the rear side of the piston of cylinder/piston unit 18 via tube 91. At the same time, the left side of the piston As the other check valve 110 associated with the cylinder chamber is pressurized and opened, the pressure acting on the rear side of the piston moves the piston to the left, discharging the fluid in the left chamber, and thereby Perform a top-four reverse Trendelenburg exercise.

This action is caused by the fluid in the left-hand portion of the piston in the cylinder 18 being forced out by the pressure in the conduit 91 and causing the check valve 11 to
This is possible because the other side of 0 is opened, allowing fluid to be discharged through tube 90 into passageway 70 and into discharge tube 105 through passageway 102 and returned to fluid reservoir 120. .

Rotation of this knob 115 also moves passageway 101, communicating passageway 101 with passageway 72 and valve outlet 82, and connecting conduit 92 with the left side portion of the piston of the cylinder of cylinder/piston unit 16. 1 pair of check valves 10
7 is not pressurized, so no fluid flow occurs within tube 92.

Other cylinder/piston units 17.14 and 1
5 each include a cylinder/piston unit 18 and 16
Similar to the operation described above for FIGS.
Which operates in one direction as the knob 115 continues to be rotated to the left in the figure. To perform each of these operations, the pressurizing passage 69 is connected to the corresponding passage 72, 73, 74, .
It is necessary to communicate with 75, 76, 77, 78 and 79. By rotating the valve member 63 to achieve this arrangement of the pressurized passages 69, the outlet passages 101 and 102 are
in communication with the other side of the respective piston to allow fluid on that side of that particular cylinder/piston unit to be drained back into the fluid reservoir 120. Further, this rotation of the valve member 63 places the other of the discharge passages 101 and 102 in communication with the adjacent cylinder/piston unit.

Knob 115 and dial 116 are secured to the operator by a detent mechanism with a spring-biased ball 121 held in an opening 122 formed in valve block 61 and urged axially inwardly by a spring. is held in the selected position. The ball 121 cooperates with a series of four portions 123, which recesses 123 are formed in the circumferential outer surface of the valve member 63 and shown on a dial 116 indicating ten different articulations from the cylinder/piston unit. The arrangement is such that one recess is used for each of the ten positions. When knob 115 is rotated 36'' from one actuated position to another, ball 121
are pushed into the corresponding quadrants 123 to releasably hold the knob 115 and dial 116 in their operative orientation.

Pressurized fluid is routed from a subsystem including a one-way constant pressure rotary piston pump 130 via a line 131 to a selection valve device 60.
(See FIG. 11).

Pump 130 includes a pump housing 132 having the shape of a parallelepiped and defining a cylindrical inner chamber 133 (see FIG. 13). A pump shaft 134 surrounded by a ball bearing race 135 is rotatably mounted within the chamber 133 . The ball bearing race 135 is attached to the pump shaft 134
It acts to maintain the radial position of. Appropriate lock ring 13G.

137 maintains the axial orientation of the pump shaft 134.

The inner end of pump shaft 134 supports a cam roller 138 rotatably mounted on pin 139. bottle 1
39 is held eccentrically by the pump shaft 134 by any suitable means, such as a screw. The cam roller 138 is adapted to rotate eccentrically within the chamber 140. Chamber 140 is arranged coaxially with chamber 133 but has a slightly smaller diameter compared to chamber 133 .

Pump housing 132 is formed with four radially extending cylindrical chambers or cylinders 141, 142, 143 and 1.44.

These chambers 141, 142, 143, 144 are the 16th
As shown, they are arranged in a common plane perpendicular to the axis of the pump shaft 34 and spaced apart from each other at an angle of 90''. , pistons 145, 146, 147 and 148, respectively, are disposed so as to be slidable in both directions.While the cam roller 138 rotates, the cam roller 138 is moved by the spring 1
Piston 145°146.1.4 against the deflection force of 78
7 and 148 successively engage each of the adjacent ends. Only one of the springs 178 is shown relative to the piston 145. Spring 178 is coupled to each piston 145 146 which is sequentially driven outwardly by rotating cam roller 138
147.148 is pressed inward.

When each piston is driven outwardly by the cam roller 138 against the biasing force of the spring 178, the chambers 1.41,
The fluid pressure within the outer spaces of each of 142, 143 and 144 is increased. Pressurized fluid created by the outward actuation of the piston fills chambers 141, 142, 143 and 1.
passageway 150 . 1531
52 and 153. Passage 150°151.1
52 and 153 are large passages 154 and 155.
, 156 and 157, respectively. Next, 1 passage 154 □ 155 156 and 157 are connected to one common passage 160 connected to the outlet (14th
(see figure).

This common passage 160 is connected to passages 154, 155° 156
and 157 are all connected to form four pistons 145,
The pressurized fluid generated by the interaction of 146, 147, and 148 is sent to the outlet 161. The outlet 161 is connected to the pipe 1
31 is in fluid communication with an inlet 66 of a selection valve arrangement 60 (see FIG. 9). In operation, continuous rotation of pump shaft 134 causes eccentric rotation of cam roller 138, driving pistons 145-148 outwardly and creating fluid pressure within common passageway 160.

During continuous rotation of the cam roller 138, the fluid pressure within the common passageway 160 is a continuous unidirectional pressure, thereby ensuring a unidirectional pressure acting on the inlet 66 of the selection valve arrangement 60.

After each piston reaches its pumping range, as illustrated by piston 145 in chamber 141 as shown in FIG.
Spring 178 acts to hold piston 145 against cam roller 138 as it moves out of driving engagement with cam roller 138 . As piston 145 moves downward, pressurized fluid is drawn from fluid reservoir 120 into the upper portion of chamber 41 via passageway 163 and chamber 164, both formed in pump housing 132 (FIG. 13). reference). A common passageway 165 is formed circumferentially around housing 132 and is connected to chamber 142.
, 1. Connects all other chambers equivalent to chamber 164 combined with 43 and 144 (see Figure 15).
. For ease of explanation, only one such passage 163 and chamber 164 have been described, but they are identical in structure and form to the other piston-associated passages and chambers of pump 130. That should be obvious.

A check valve in the form of a ball 166 is located within each of the chambers 164 . Ball 166 is adapted to close chamber 164 from interconnecting passageway 165 under the action of spring 167 . Spring 167 normally biases ball 166 to block communication between chamber 164 and passageway 165.

Interconnecting passage 165 is connected to inlet 168 of pump 130 . The inlet 168 is connected to the outlet side of the fluid reservoir 120 by a tube 169 (see FIG. 11).

In operation, as each piston 145, 146, 147, and 148 is driven radially inwardly by spring 178 following cam roller 138, the fluid pressure acting on the opposite end of each piston is reduced. However, the fluid in the fluid reservoir 120 flows into the ball 166 and the spring 16.
Fluid flows into the chamber 164 from the common passage 165 overcoming the shutoff action of the check valve consisting of 7 and filling the cylinder on that side of each piston. As mentioned above, when each piston is driven in opposite directions,
The fluid pressure at the end of the piston remote from the cam roller 138 is increased to provide pressurized fluid to the passages 150 - 157 and thus into the inlet 66 of the selection valve arrangement 60 .

Pump shaft 134 terminates in a crank arm 172 and handle 173 to enable pumping of pump 130 by an operator, as shown in FIG. By rotating the crank arm 172 with the handle 173, the cam roller 138 rotates eccentrically,
This creates fluid pressure and flow for the inlet 161. This fluid flow is unidirectional, as indicated by the arrow, regardless of which direction the crank arm 172 is rotated.

When operating the platform 1, the pump 130 is used to obtain the desired articulation movement and its direction after rotating the knob 115 and dial 116 to the appropriate settings.

Actual movement of the table top portion then occurs by rotating the handle 173. If the handle 173 is rotated at a moderate speed, the articulation movement will be gentle, and conversely, if the handle 173 is rotated relatively quickly, the speed of the articulation movement will be correspondingly increased.

Pump 130 is designed with a safety mechanism that prevents reverse articulation from occurring if the operator accidentally moves handle 173 in a direction opposite to the direction in which it was originally initiated. For example, if handle 173 is rotated in a clockwise direction as shown in FIG. 3 to initiate a particular joint movement, even if handle 173 is accidentally rotated counterclockwise, The direction of motion is maintained continuously and joint movements in the opposite direction do not occur. Regardless of which direction the handle 173 is rotated or when the change in rotation occurs, the direction of articulation of the table top portion remains at the original program determined by the setting of the dial 116.

Another operational feature unique to the pump 130 due to its design and ability to generate pressure in one direction independent of the direction of rotation of the pump shaft 134 is the repetitive short relative movement (repetitive rocking) of the handle 173. ) is the ability to maintain this unidirectional pressure for articulation of the base portion. If the handle cannot be fully rotated in one direction to perform the articulation due to the presence of a device or person blocking full rotation of the handle, the handle must be rotated through its entire range of rotation. It can be operated on the side to perform short up and down strokes.

As mentioned above, the platform 1 is configured to perform upward or downward vertical movement relative to the platform 2 by means of the pre-inserted pedestal 3. The pedestal 3 includes rectangular tubular portions 12, 180, 181 and 182, as shown in FIG. The latter three tubular sections are completely surrounded by the pedestal section 12 when in the fully retracted state. Inside the base 2 and pedestal 3, a lift control subsystem including a cylinder/piston unit 185 is provided. The cylinder/piston unit 185 includes a cylinder 18 pivotally connected to the base 2.
6 and a piston rod 187 extending upward toward the main frame 10.

The upper end of the piston rod 187 rotatably supports a pulley 188 relative to the upper end, the pulley 188 having a chain 189 entrained therearound. One end of the chain 189 is fixed to the inner wall of the lowermost pedestal portion 182, and the other end is fixed to a hanging member 190 fixed to the inner surface of the plate 22.

A plate 22 closes off the upper end of the pedestal section 12.

With this configuration, when the pulley 188 is driven upward by actuation of the cylinder/piston unit 185, the pulley 188 is moved upwardly by the chain 188 connected to the depending member 190.
9 and a hanging member 190,
The pedestal portion 12 is therefore moved upwards. In this way, the base 1 has a cylinder/piston unit 185
is raised to the range where it operates.

With the upward movement of the pedestal section 12 transmitted in this way, the lower sections 180 and 181 are likewise extended upwardly. When the cylinder/piston unit 185 is operated in the opposite direction, the pulley 188 descends,
The resulting retraction of the pedestal section thereby causes a downward movement of the platform.

The cylinder/piston unit 185 is actuated by a hydraulic pump 194 that is actuated by stepping on the foot.
(See Figure 17). The pump 194 is preferably mounted within the base 2 and has a lever 19 to which a pedal 196 is attached.
5 (see Figure 18). Lever 19
5 and the pedal 196 are connected to the selection valve device 60 and the pump 13
It extends to the outside of the pedestal 2 where it can be easily accessed by the operator operating the 0. As shown in FIG. 18, the lever 195 is pivotable around a pivot pin 197 fixed inside the base 2, and a crank arm 198 is fixed to the lever 195. An arm 198 extends from the pivot pin 197 and is connected to the wheel 1 on one side.
I support 99. The wheel 199 is connected to the pump 194
The piston 201 is configured to straddle one end of the piston rod 200 of the piston 201, which is slidably housed inside the cylinder 202 of the piston 202. By repeatedly depressing the pedal 196, the wheel 199 repeatedly drives the piston 20 and thereby the cylinder/piston unit 185.
Pressure is generated within the pulley 188 to raise the pulley 188, thereby raising the platform 1.

The cylinder head of the pump 194 is hydraulically connected to a T-shaped connection 204 by a tube 203 (see FIG. 17). One end of the T-shaped connection 204 is connected to the pipe 20
5 is connected to the cylinder 186, and the other end of the bracket is connected to the pipe 2.
06 is connected to a dump valve 207.

Dump valve 207 includes a plunger 208. Plunger 208 acts to relieve fluid pressure within cylinder 186 when actuated inwardly.

This inward movement of plunger 208 is caused by roller 199
This is done by making movable contact with an actuating contact member 209 fixed to the outer end of the crank arm 198 opposite the position . In order to lower the platform 1, the operator only has to move the pedal 196 upwards, for example by foot movement, and rotate the crank arm 198 in a clockwise direction. This operation causes the action contact member 209 to be pressed upwardly toward the plunger 208, causing the action contact member 209 to
is driven inward, releasing the fluid pressure within the cylinder 186, thereby causing the platform 1 to move downward. A flow control device 210 connected to the tube 205 serves to control the increase in pressure and release the pressure in the cylinder 186, thereby ensuring patient comfort during the lowering of the platform 1.

It is advantageous if the tube members 12, 180, 181 and 182 have a rectangular cross-section, since this prevents the pre-installed pedestal 3 from twisting. In addition, the pedestal 2, which eliminates the need for keys that require constant adjustment as in the case of a pedestal made of a cylindrical member, is equipped with foot members 215 at its corners that make contact with the floor. 215 adjacent to each of the leg wheels 216
It is equipped with The foot members 215 in contact with the floor are adjustably fixed to the underside of the base 2, as shown in FIG. 20, and are adapted to normally rest on the floor associated with the area in which the base 1 is intended to be used. ing. Adjacent to each foot member 215 is a leg ring 216 and its actuation structure. Since all four casters and actuating structures have the same structure, only one of the casters and actuating structures will be described in detail below.

The leg wheels 216 are shown rotatably mounted on a lever member 217 pivotally connected to the base 2 by a pivot pin 218 fixed to the base 2, as shown in FIGS. 20 and 21. be.

Pivot pin 21 of lever member or pivot member 217
The end opposite 8 is coupled to act on a piston rod 219 of a hydraulic cylinder/piston unit 220 mounted on the base 2. When the fluid pressure in the cylinder of the unit 220 is increased, the piston rod 219 moves downward and drives the lever member 217 from the position shown by the dotted line to the position shown by the solid line, and its operation pushes the caster wheels 216 downward and touches the floor. engage and lift the adjacent end of the pedestal 2. This action causes the foot member 215 to disengage from its previous engagement contact with the floor, so that this corner of the base 2
It is placed above 6. By releasing the fluid pressure in the cylinder of the unit 220, the caster wheels 216 move upward to the position indicated by the dotted line, and the pedestal 2 descends,
Thereby, the foot member 215 comes into contact with the floor and supports the base 2, and therefore serves to support the base 1.

Fluid flow to the caster actuating cylinder/piston unit 220 is generated by a lever 221 with a pedal 222 mounted at one end for actuation by the operator (see FIG. 19). The pedal 222 is mounted adjacent to the pedal 196 of each lifting pump 4. Pedal 222 acts to operate pump 223. The pump 223 includes a caster actuating cylinder/piston unit 220 mounted at one corner of the pedestal 2 and cylinder/piston units 224, 225 arranged one each at the other three corners of the pedestal. and 226 by hydraulic pressure. Pump 223 is similar to pump 194, as shown in FIG. 19, and includes all of the associated structure illustrated in FIG. 18, i.e., by repeatedly depressing pedal 222, The pump 223 is adapted to generate pressure in its cylinder and to transmit this pressure to the four hydraulic units (220, 224, 225, 226) for actuating the casters.

Pump 223 is associated with a dump valve 227 and actuation mechanism similar to that for pump 194.

The output side of the pump 223 is connected to the pipe 2 as shown in FIG.
23a, it is connected to the hydraulic pressure units 220 and 224 for operating the suspension wheels disposed at one end of the pedestal 2, and the pipe 22
3b, it is connected to the hydraulic pressure units 225 and 226 for operating the caster wheels disposed at the other end of the pedestal 2. pump 2
23, the front units 220, . 2
24 and the rear units 225, 228 at the same time, and drive the wheels combined with these units downward relative to the respective corners of the pedestal 2, thereby The effect is to raise the foot member 215 from the floor and to place the pedestal 2 and thus the pedestal 1 on the four leg wheels associated with the pedestal 2. This configuration allows the platform to be moved longitudinally and laterally as desired.

In order to return the pedestal 2 to the state in which it is supported by the foot member 215, the pedal 222 is lifted by the operator's foot and the fluid pressure in the units 220, 224, 225 and 226 is released by means of the dump valve 227, thereby allowing the pedestal to The downward movement of 2 is performed by the action of gravity, and the foot members 215 come into contact with the floor and support the pedestal 2 instead of the leg wheels 216, and as a result, the pedestal 1 is supported. If the floor is uneven or the pressure release from the caster hydraulic unit is not evenly distributed, the table top 4 tends to rock. This tendency also occurs when the patient is moved, or accessories are moved, or the operating table handler leans against the operating table.

The hydraulic device shown in FIG.
Designs are designed to prevent or minimize this oscillation if it occurs before it is completely stationary and fixed.

For this purpose, this hydraulic device includes a check valve 228 interposed between the pump 223 and each of the units 220, 224 at one end of the pedestal 2, and a check valve 228 interposed between the pump 223 and each of the units 220, 224 at one end of the pedestal 2; Check valve 2 interposed between 225 and 226
29. Check valves 228229 allow pressurized fluid to flow to each of the four units during pumping by pump 223, as shown. When releasing this fluid pressure by the dump valve 227 in order to lower the plinth 2, the fluid in the cylinder for the unit 220, 224 passes through the conduit 223a and through the check valve 230;
and the fluid reservoir 120 of the hydraulic system via the dump valve 227.
is discharged inside.

Similarly, the fluid in the cylinders of units 225, 226 is discharged via conduit 223b to dump valve 227 via check valve 231.

Since the floor surface is not flat, only three of the leg members 215 are placed on the floor after actuating the dump valve 227, and the leg wheels combined with the fourth hydraulic unit remain in contact with the floor. Assuming that, the pedestal 2 remains supported by the three foot members 215, and this condition is sufficient to support the pedestal. However, the movement of the patient on the table,
Assuming a sudden shift of weight to the corner of the pedestal where the leg wheels are still acting, due to the operator leaning against the pedestal or moving the accessory, the pedestal will move until the fourth foot member 215 makes contact with the floor. usually swings or tilts in the direction of the corner. This is caused by the pressure in the still working hydraulic unit suddenly increasing due to the rocking, which causes it to release its internal final pressure to another hydraulic unit. . However, in the present invention, check valves 228 229, 230 and 231 is provided.

If two of the casters are to be fixed from free rotation so that the platform and pedestal can be advanced in a controlled path of movement, the other caster of the platform A device was devised to lock two of the casters 216 against pivoting in order to enable them to act as a steering mechanism for the movement of one.

As shown in FIGS. 20 and 21, each leg ring 216
is rotatably mounted on the lever member 217 by a bearing member 232 mounted inside the lever member 217 so as to rotate about a vertical axis. Bearing member 232
Two openings 233 are formed at diametrically opposed positions. Both openings 233 have elongated bottles 23
It is configured to accommodate 4.

Bin 234 restrains rotational movement of caster 216 about axis 231 when inserted into opening 233 .

Bin 234 is secured to one end of cable 235. The cable 235 extends along the entire length of the base 2 and is connected to one end of a crank arm 236 located between the pedals 222 and 196 (see FIG. 19).

The outer end of the crank arm 236 is provided with a pedal 237 operated by the operator. The springs 238 associated with the bins 234 are such that each leg wheel 216 is aligned with the axis 2.
The leg wheels 21 so that they cannot rotate around 31
6 is typically pushed into one of the two openings 233 to lock it in place.

To release the two casters 216 and allow them to rotate freely about axis 231, the operator depresses pedal 237 and rotates crank arm 236 counterclockwise as shown in FIG. The bottle 234 can be removed from the opening 233 by rotating it.

When the table top 4 is arranged in one common plane, the table top 4
Equipped with a novel structure of the rail device that allows accessories to be moved smoothly from one end to the other without any hindrance, thereby allowing accessories to be moved from one platform section to another. This eliminates the need for the operator to remove an accessory from one platform section and reinstall it on another platform section. As shown in FIGS. 2, 2A and 22, platform section 5 is provided with rails 250, 251 on both sides thereof, platform section 6 is provided with rails 252, 253, and platform section 7 is provided with rails 254, 255. It is equipped with To simplify the explanation, only the rails combined with the platform parts 5 and 6 will be discussed.

Rail 25 adjacent to the end of rail 253 for platform portion 6
An extension 258 having approximately half the thickness of the rail 251 is formed at the end of the rail 251 .

This extension 258 is arranged to cooperate with and overlap a similar extension 259 of approximately half the thickness of the rail 253 .

A pivot pin 260 extends through the extension 258.259 and is axially aligned with the pivot axis of the pivot 8 of the platform parts 5 and 6, so that the rail 251.25
3 ensures that the pivotable connection between the platform parts 5 and 6 does not interfere with the articulation between the platform parts 5 and 6.

Each of the extensions 258 , 259 is fixed at a semi-circular distal end with a center radius perfectly aligned with the axis of the pivot pin 260 .

The semi-circular ends are arranged in overlapping relationship so that the straight surfaces of the rails 251, 253 and the extensions 258, 2
The upper joining surface with the semi-circular surface of 59 remains flat, thereby providing a continuous, uninterrupted, smooth rail for the movement of accessories along the rail from one platform section to another. surface is provided. Above, rail 251 and rail 2
Although only the 53 rail connections have been described, it will be appreciated that the above description also applies to the connections between the rails 252, 253 and the rails 254, 255.

Although the preferred embodiments of the present invention have been described and illustrated above,
Besides the embodiments particularly pointed out in the foregoing description, particularly with respect to the parts of each of the foregoing subsystems and the form and relationships of the subsystems themselves, various modifications and changes may depart from the spirit of the invention as claimed. It will be understood that many things can be done.

[Brief explanation of the drawing]

FIG. 1 is a perspective view of a surgical and/or examination table in which the present invention is used, FIGS. 2 and 2A are a plan view and a side view of the top of the surgery and/or examination table, respectively, and FIG. Schematic diagram of the hydraulic device for articulating the table parts, Figures 4 and 5
Figures 6 and 7 are lines 4-4 and 5 of Figure 1, respectively.
- surgery and/or viewed along lines 5, 6-6 and 7-7;
or a sectional view of the examination table; FIG. 8 is a partial elevational view of one end of the frame portion of the surgical and/or examination table of FIG. 1 showing the selective control valve device used in the present invention; and FIG. The figure is a cross-sectional view of the selection control valve device taken along line 9-9 in Figure 8.
0 is a cross-sectional view of the selection control valve arrangement of FIG. 9 taken along line 10--10 of FIG. 9, and FIG. 11 is a cross-sectional view of the selection control valve arrangement of FIG. A schematic flow diagram showing the hydraulic device, Figure 12 is the 9th
13 is a cross-sectional view of the rotary piston pump used in the present invention taken along line 13--13 in FIG. 8; FIG. Figures 15 and 16 are lines 14-14 and 15- in Figure 13, respectively.
A cross-sectional view of the pump of FIG. 13 taken along lines 15 and 16-16, respectively, and FIG. 17 shows a hydraulic device for raising a surgical and/or examination table of the present invention and legs therefor. FIG. 18 is a schematic flow diagram showing the control system; FIG. 18 is a partially cutaway elevational view of one end of the pedestal of a surgical and/or examination table showing the control pedal and the pump used with the pedal; FIG. The figure is a plan view of the end of the surgical and/or examination table shown in FIG. 18, and FIG. 20 is a partial view of one corner of the pedestal showing the pedestal and the structure associated with the pedestal. , second
1 is a plan view of the corner of the base shown in FIG. 20, and FIG. 22 is a partial perspective view of the pivot connection between the sight rails of the table section used in the surgical and/or examination table of the present invention. It is a diagram. 1...stand, 2...pedestal, 3...pedestal, 4...
...Table top, 5...Load support part, 6...Seat part, 7...Leg support part, 8, 9...Pivot I
~, 14°] 5.16, 17.18...Cylinder/piston unit, 37.38...Link, 6[)...
- Selection valve device, 61... Valve block, 62... Valve chamber, 63... Valve member, 64... Groove, 65... Passage,
66... Inlet, 58-7... Passage, 80-8... Outlet, 101. 102... Passage, 106-11.0... Check valve, 1
15...knob, 116...dial, 120...
Fluid reservoir, 130... Pump, 132... Pump housing, 133... Chamber, 134... Pump shaft, 1
38...Cam roller, 141-144...Chamber, 14
5~148... Piston, 150~157.160.
... Passage, 161... Discharge port, 165... Passage, 1
72... Crank arm, 173... Handle, 1
85...Cylinder/piston unit, 207...
Dump valve, 215... Leg member, 216... Leg ring, 2
20-226...Hydraulic pressure unit for suspension wheels, 223...
pump, 228-231... check valve, 233... opening, 234... bottle, 238... spring, 250-
255...Rail member.

Claims (22)

[Claims] (1) In a control device that selectively controls the flow of fluid to a plurality of cylinder/piston units independently from a fluid pump that pressurizes a piston inside each cylinder and drives it in one direction, a cylindrical a plurality of valve ports having a valve chamber and communicating with the valve chamber associated with each of the cylinder/piston units and configured to fluidly cooperate with the cylinder by a plurality of adjacent valve ports; a valve block having an inlet connected to a pump discharge port; and a cylindrical valve member rotatably mounted within the valve chamber for movement into an operating position relative to each of the cylinder/piston units. the valve member, in each of its actuated positions, connects one of the adjacent valve ports with one side of a piston of a unit and connects the inlet with the other side of a piston of that unit; whereby each piston is driven in one direction, and in another operating position connects the other of said adjacent valve ports with the other side of said piston and connects said inlet to said one side of said piston. A control valve device, characterized in that a passage is formed, the passage being arranged to be connected to the piston and thereby drive the piston in the other direction. (2) In a control device that selectively controls the flow of fluid to a plurality of cylinder/piston units independently from a fluid pump that pressurizes a piston inside each cylinder and drives it in any one direction, a cylindrical having a valve chamber and communicating with said valve chamber configured to fluidly cooperate with the cylinder by two adjacent valve ports associated with each of the cylinders, one for each side of the piston; a valve block having a plurality of valve ports formed therein and an inlet valve port connected to a discharge port of the pump; and a cylindrical valve member having two radial passageways formed therein, the valve member having one of the passageways connected to the adjacent valve for each of the actuated positions of the valve member. A control valve device, characterized in that it is configured to be operatively connected to one of the ports and to connect the other passageway to the inflow valve port. 3. The control valve device according to claim 1, further comprising a detent device for releasably holding the valve member when the valve member is rotated relative to the valve block. 4. The control valve system of claim 1, wherein each cylinder/piston unit includes one check valve for controlling fluid flow therein. 5. The control valve arrangement of claim 1, wherein each cylinder/piston unit includes two check valves for controlling fluid flow relative to pressurization on opposite sides of the piston therein. (6) Each cylinder/piston unit is provided with a pair of check valves, one for each direction of movement of its pistons, and configured to lock the position of the piston in the event of a failure of the device. The control valve device according to claim 1, comprising: (7) a platform constituted by two or more functionally articulating platform sections, a cylinder/piston unit and a linkage associated with the unit for articulating each platform section, and a piston; a fluid pump having a fluid pump pressurized in each cylinder to drive the fluid in either direction; A valve having a plurality of valve ports communicating with the valve chamber configured to fluidly cooperate with a cylinder through a plurality of combined and adjacent valve ports, and an inflow port connected to a discharge port of the pump. a cylindrical valve member rotatably mounted within the valve chamber for movement into an operative position relative to each of the cylinder/piston units, the valve member having a cylindrical valve member rotatably mounted within the valve chamber for movement into an operative position relative to each of the cylinder/piston units; one of the adjacent valve ports is connected to one side of the piston of one unit and the inlet is connected to the other side of the piston of that unit, so that each piston is driven in one direction, and In another operating position, the other of the adjacent valve ports is connected to the other side of the piston and the inlet is connected to the one side of the piston, thereby driving the piston in the other direction. What is claimed is: 1. An operating table characterized in that a passageway is formed so as to be arranged as shown in FIG. (8) a platform constituted by two or more functionally articulating platform sections, a cylinder/piston unit and a linkage associated with the unit for articulating each platform section; a cylindrical valve member having a radial passage formed therein; a valve block having a cylindrical valve chamber configured to rotatably house a member; and a device for selectively rotating the valve member to an actuated position indicative of respective articulation of the base portion; The valve block is formed with a valve port arranged for fluid cooperation with the cylinder/piston unit upon rotation of the valve member to the actuated position, the valve port being connected to two adjacent valve ports. is associated with each of the cylinder/piston units and arranged to cooperate with the passageway of the valve member for each of the actuated positions of the valve member, in which the adjacent valve ports an operating table, wherein one of the adjacent valve ports is connected to a positive pressure side of each piston, and the other of the adjacent valve ports is connected to a negative pressure side of the piston. (9) In an operating table or similar table having a patient support platform constituted by two or more functionally articulating table sections and a cylinder/piston unit for articulating each table section. , a valve block having a cylindrical valve chamber, a valve port communicating with the valve chamber and arranged in fluid cooperation with a cylinder of a cylinder/piston unit, and a fluid inlet for receiving pressurized fluid; , a cylindrical valve member supported within said valve chamber for rotational movement into an operative position for each of the cylinder/piston units, said valve member having one of said valve ports in each of said operative positions. connecting one side of the pistons of a unit and connecting the inlet to the other side of the pistons, such that each piston is driven in one actuation direction to articulate a respective platform portion; , and a passageway arranged to connect another one of said valve ports with one side of a piston of another unit; and a pump for unidirectionally supplying fluid connected to the inlet to supply fluid pressure to the valve port under selective control by the valve member as described above. Operating table. (10) In an operating table or similar table having a patient support platform constituted by two or more functionally articulating table sections and a cylinder/piston unit for articulating each table section. , a valve block having a cylindrical valve chamber, a valve port communicating with the valve chamber and arranged in fluid cooperation with a cylinder of a cylinder/piston unit, and a fluid inlet for receiving pressurized fluid; a cylindrical valve member supported within the valve chamber for rotational movement into an actuated position relative to each cylinder/piston unit, the valve member having a plurality of passageways formed therein; One of the passages connects one of the valve ports with one side of the piston of the first cylinder/piston unit when the member is rotated to one of its operative positions, and a second passage connects the inlet with one side of the piston of the first cylinder/piston unit. the other side of the cylinder/piston unit to drive the piston in its one direction of movement to articulate the respective platform portions, and a third passageway connects a second port of the valve port to the other side of the second cylinder/piston unit. said valve member being adapted to connect with one side of the pistons and selectively controlled by said valve member as described above to drive each piston and articulate the respective platform portions. A surgical table comprising: a pump for unidirectionally supplying fluid connected to the inlet to supply fluid pressure to the port. (11) the plurality of passages are arranged for different operating positions of the valve member, one of the passages connecting the third port of the valve ports to one side of the piston of the third unit of the cylinder/piston unit; the second passageway connects the inlet with the one side of the piston of the first unit to drive the piston in its other direction of movement to articulate the respective platform portions, and 5. The operating table of claim 4, wherein the third passageway is configured to connect the second port with the other side of the piston of the first unit. (12) A patient support table having a base and a support pedestal for supporting a patient in various positions suitable for medical treatment and/or examination, including a plurality of table sections pivotally connected together at their ends. , the platform portions forming a continuous table top configured to be supported by the top surface of the platform portions disposed in a common plane, and further comprising: a device associated with each of said platform portions for articulation with respect to said platform portions and independently of the other portions of said platform portions; and elongate rail members configured to be respectively axially aligned when the two rails are in the common plane, the rail members being configured to slidably support a platform accessory thereon. It has a top surface that is
further comprising a pivot device disposed at an adjacent end of the rail member for driveably coupling one rail member with an adjacent rail member during articulation of the rail member; a patient support platform having a top surface that is adjacent to a top surface of a connecting rail member, thereby forming a continuous, uninterrupted, coplanar rail surface along both sides of the platform. 13. The support platform of claim 12, wherein said pivot device includes overlapping terminal elements, the overlapping dimension of said terminal elements being equal to the dimension of one rail member in the lateral direction of the platform portion. (14) A pivot device for pivotally connecting the platform portions, wherein the pivot device for the rail member and the pivot device for the platform portion are pivotable along one common axis. 12. The support stand according to 12. 15. The support platform of claim 12, wherein the pivot device for the rail member and the rail member for the platform portion include a common pivot pin. (16) In a hydraulic pump that generates continuous fluid pressure against a double-acting cylinder/piston unit, four cylindrical chambers are arranged radially such that their axes are mutually perpendicular. a pump housing having an outlet and having an outlet connected to a cylinder/piston unit; a piston slidably received within each of said chambers; a rotary drive member arranged to be continuously pushed in and operatively connected to the piston, such that each of the chambers is sequentially pressurized during continuous rotation of the rotary drive member. further comprising means for moving each of the pistons radially inwardly after outward movement, the housing communicating with the chamber and the outlet during pressurization thereof to thereby cause the cylinder/piston to move radially inwardly; said housing having interconnecting passageways for sequentially applying fluid pressure in one direction to the piston unit; and said housing having interconnecting passages for sequentially discharging fluid within each of said chambers during radial inward movement of said piston. A fluid discharge passage is formed for the purpose of the present invention, and the passage is further arranged to apply the continuous fluid pressure in one direction to the discharge port while the driving member rotates in one direction. A fluid pump characterized in that it is equipped with a check valve device. (17) In a surgical and/or examination table device for supporting a patient during surgery and/or examination, a plurality of units are pivotally connected to each other to constitute various functionally articulated devices. a platform having separate platform sections and including a cylinder/piston unit and linkage for independently and selectively articulating each platform section; and an upright pedestal operatively connected to said platform. and a pedestal including a hydraulic device configured to extend or retract the pedestal to thereby vary the height of the pedestal and the pedestal portion thereof, and for controlling fluid flow to the cylinder/piston unit. a fluid device combined to act on the platform, the fluid device including a pump housing having a discharge port formed therein and movable in either direction of rotation to generate pressure within the housing. a pressure generating device configured in the housing having a manually rotatable member; and the housing configured to supply pressure in one direction to the discharge port when the rotatable member is rotated in any one direction. a passageway formed in the interior of the cylinder, further defining a cylindrical valve chamber and arranged in fluid cooperation with the cylinder by adjacent valve ports associated with each cylinder/piston unit. a valve block having a valve port communicating with the valve chamber and an inflow port connected to the discharge port of the pump;
a control valve mechanism having a cylindrical valve member rotatably mounted within the valve chamber for movement to an operative position for each of the piston units, the valve member having a cylindrical valve member rotatably mounted within the valve chamber for movement to an operative position for each of the piston units; one of the valve ports connected to one side of the piston of a cylinder/piston unit, and the inlet connected to the other side of the piston of the unit, so that each piston is oriented in one direction. and connecting the other of the adjacent valve ports with the other side and the inlet with the one side of the piston in another operative position, thereby causing the piston to move in another direction. Surgery and/or surgery characterized in that a passage is formed that is configured to be driven.
Or examination table equipment. (18) In a surgical table or similar table having a support table apparatus that includes a plurality of articulating table sections and a cylinder/piston unit for articulating each table section, a continuous connection to the cylinder/piston unit. A fluid pump for generating fluid pressure is provided, the pump having four cylindrical chambers arranged radially such that their respective axes are perpendicular to each other, a discharge port, and a slider in each of the chambers. a pump housing having a movably housed piston;
said chambers being arranged to successively force said piston radially outwardly relative to their respective chambers such that each of said chambers is sequentially pressurized during successive rotations of the rotary drive member; a rotary drive member operatively connected to the pistons; and a device for moving each of the pistons radially inwardly after outward movement; an interconnecting passage communicating with the outlet so that a continuous unidirectional pressure is applied to the outlet;
The housing is formed with a fluid discharge passage for successively discharging fluid from each of the chambers during the inward movement of the piston; a check valve device in combination with said passage configured to apply said continuous unidirectional pressure to said outlet during rotation; A surgical table comprising a valve mechanism for selectively connecting a discharge port. (19) A surgical and/or examination table having an articulated table portion for supporting a patient, comprising: a table configured to move on the floor; and a table mounted on the table so as to move vertically; a pedestal coupled to the pedestal for supporting the pedestal, the pedestal including a plurality of foot members, two of the foot members being disposed at each end of the pedestal and supporting the pedestal and the pedestal in a fixed position; The foot members are configured to be placed on the floor for support in the operating position, and further include one foot member attached to the pedestal adjacent to each of the foot members and configured to be in contact with the floor and to be in contact with the floor. at least four leg wheels movably mounted so as to be removed from the contact state; and driving force is transmitted to the leg wheels so as to bring the leg wheels into contact with the floor to bring the foot member into supporting contact with the floor. a device associated with each of said casters for moving away from said casters and releasing said drive force and returning said casters to a state of non-contact with the floor; and controlling release of said drive force; A device combined with said driving force transmitting device for transmitting force, said cylinder/
and/or a device for ensuring that the forces generated in one of the piston units are not released, thereby forcing the treadle combined with said device into contact with the floor. Or a table for examination. (20) A surgical and/or examination table having an articulating table portion for supporting a patient, comprising a pedestal configured to move on the floor; and a pedestal mounted on the pedestal for vertical movement; a pedestal coupled to the pedestal for supporting the pedestal, the pedestal including a plurality of foot members, two of the foot members being disposed at each end of the pedestal and supporting the pedestal and the pedestal in a fixed position; the foot members are configured to be placed on the floor for support in position; at least four tread wheels movably mounted to remove the legs; a cylinder/piston unit associated with each of said tread rings; and a cylinder/piston unit associated with each of said tread rings; a fluid pressure source for actuating the cylinder/piston unit by introducing fluid pressure into the cylinder/piston unit to move a member out of supporting contact with a floor; a device for releasing the fluid pressure from the unit to return the leg wheels to a non-contact state with the floor by the action of gravity; and a device for controlling the release of the fluid pressure, the device comprising: a device for controlling the release of the fluid pressure, the device comprising: When weight acts on the cylinder/
a device for ensuring that the fluid pressure generated in one of the piston units is not released, thereby forcing the treadle associated with said device into contact with the floor; /or examination table. 21. The platform of claim 20, wherein said control device includes a network of check valves arranged to prevent release of pressure from said one cylinder/piston unit. (22) A surgical and/or examination table having an articulating table portion for supporting a patient, comprising: a pedestal configured to move on the floor; and a pedestal mounted on the pedestal so as to move vertically; and a pedestal coupled to the base for supporting the base, the base including a plurality of foot members, two of the foot members being disposed at each end of the base and keeping the base and the base constant. The foot member is configured to be placed on the floor so as to be held in the position of the foot member, and further, one foot member is attached to the base so as to be freely rotatable adjacent to each of the foot members, and is in contact with the floor. at least four cast wheels movably mounted to move the cast wheels into position and out of contact with the floor; a cylinder/piston unit associated with each of said cast wheels; and a cylinder/piston unit associated with each of said cast wheels; a fluid pressure supply for actuating said cylinder/piston unit by introducing fluid pressure into said cylinder/piston unit to push down and thereby move said foot member out of supporting contact with the floor; selectively locking a leg ring at one of the ends of the pedestal from free rotation, thereby advancing the pedestal in a predetermined direction by the other leg ring at the other end of the pedestal; A surgical and/or examination table characterized in that it is equipped with a locking device that is a locking pin that restrains the rotation of each leg ring.