WO2003025453A1 - Bras de support pour systeme de salle d'operation - Google Patents
Bras de support pour systeme de salle d'operation Download PDFInfo
- Publication number
- WO2003025453A1 WO2003025453A1 PCT/US2001/028731 US0128731W WO03025453A1 WO 2003025453 A1 WO2003025453 A1 WO 2003025453A1 US 0128731 W US0128731 W US 0128731W WO 03025453 A1 WO03025453 A1 WO 03025453A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- proximal
- distal
- parallel link
- hub
- pivot axis
- Prior art date
Links
- 238000006073 displacement reaction Methods 0.000 claims description 44
- 210000005069 ears Anatomy 0.000 description 6
- 230000005483 Hooke's law Effects 0.000 description 5
- 238000012546 transfer Methods 0.000 description 5
- 238000013178 mathematical model Methods 0.000 description 3
- 238000005259 measurement Methods 0.000 description 3
- 238000001356 surgical procedure Methods 0.000 description 3
- 229910000831 Steel Inorganic materials 0.000 description 2
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- 230000007423 decrease Effects 0.000 description 2
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- 239000010959 steel Substances 0.000 description 2
- 238000000418 atomic force spectrum Methods 0.000 description 1
- 238000005094 computer simulation Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 239000013013 elastic material Substances 0.000 description 1
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- 238000002474 experimental method Methods 0.000 description 1
- 230000002452 interceptive effect Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000009993 protective function Effects 0.000 description 1
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16M—FRAMES, CASINGS OR BEDS OF ENGINES, MACHINES OR APPARATUS, NOT SPECIFIC TO ENGINES, MACHINES OR APPARATUS PROVIDED FOR ELSEWHERE; STANDS; SUPPORTS
- F16M11/00—Stands or trestles as supports for apparatus or articles placed thereon ; Stands for scientific apparatus such as gravitational force meters
- F16M11/20—Undercarriages with or without wheels
- F16M11/24—Undercarriages with or without wheels changeable in height or length of legs, also for transport only, e.g. by means of tubes screwed into each other
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B90/00—Instruments, implements or accessories specially adapted for surgery or diagnosis and not covered by any of the groups A61B1/00 - A61B50/00, e.g. for luxation treatment or for protecting wound edges
- A61B90/50—Supports for surgical instruments, e.g. articulated arms
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61G—TRANSPORT, PERSONAL CONVEYANCES, OR ACCOMMODATION SPECIALLY ADAPTED FOR PATIENTS OR DISABLED PERSONS; OPERATING TABLES OR CHAIRS; CHAIRS FOR DENTISTRY; FUNERAL DEVICES
- A61G12/00—Accommodation for nursing, e.g. in hospitals, not covered by groups A61G1/00 - A61G11/00, e.g. trolleys for transport of medicaments or food; Prescription lists
- A61G12/002—Supply appliances, e.g. columns for gas, fluid, electricity supply
- A61G12/004—Supply appliances, e.g. columns for gas, fluid, electricity supply mounted on the ceiling
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16M—FRAMES, CASINGS OR BEDS OF ENGINES, MACHINES OR APPARATUS, NOT SPECIFIC TO ENGINES, MACHINES OR APPARATUS PROVIDED FOR ELSEWHERE; STANDS; SUPPORTS
- F16M11/00—Stands or trestles as supports for apparatus or articles placed thereon ; Stands for scientific apparatus such as gravitational force meters
- F16M11/02—Heads
- F16M11/04—Means for attachment of apparatus; Means allowing adjustment of the apparatus relatively to the stand
- F16M11/06—Means for attachment of apparatus; Means allowing adjustment of the apparatus relatively to the stand allowing pivoting
- F16M11/10—Means for attachment of apparatus; Means allowing adjustment of the apparatus relatively to the stand allowing pivoting around a horizontal axis
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16M—FRAMES, CASINGS OR BEDS OF ENGINES, MACHINES OR APPARATUS, NOT SPECIFIC TO ENGINES, MACHINES OR APPARATUS PROVIDED FOR ELSEWHERE; STANDS; SUPPORTS
- F16M11/00—Stands or trestles as supports for apparatus or articles placed thereon ; Stands for scientific apparatus such as gravitational force meters
- F16M11/20—Undercarriages with or without wheels
- F16M11/2007—Undercarriages with or without wheels comprising means allowing pivoting adjustment
- F16M11/2035—Undercarriages with or without wheels comprising means allowing pivoting adjustment in more than one direction
- F16M11/2064—Undercarriages with or without wheels comprising means allowing pivoting adjustment in more than one direction for tilting and panning
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16M—FRAMES, CASINGS OR BEDS OF ENGINES, MACHINES OR APPARATUS, NOT SPECIFIC TO ENGINES, MACHINES OR APPARATUS PROVIDED FOR ELSEWHERE; STANDS; SUPPORTS
- F16M11/00—Stands or trestles as supports for apparatus or articles placed thereon ; Stands for scientific apparatus such as gravitational force meters
- F16M11/20—Undercarriages with or without wheels
- F16M11/2092—Undercarriages with or without wheels comprising means allowing depth adjustment, i.e. forward-backward translation of the head relatively to the undercarriage
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16M—FRAMES, CASINGS OR BEDS OF ENGINES, MACHINES OR APPARATUS, NOT SPECIFIC TO ENGINES, MACHINES OR APPARATUS PROVIDED FOR ELSEWHERE; STANDS; SUPPORTS
- F16M13/00—Other supports for positioning apparatus or articles; Means for steadying hand-held apparatus or articles
- F16M13/02—Other supports for positioning apparatus or articles; Means for steadying hand-held apparatus or articles for supporting on, or attaching to, an object, e.g. tree, gate, window-frame, cycle
- F16M13/027—Ceiling supports
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
- F21V21/00—Supporting, suspending, or attaching arrangements for lighting devices; Hand grips
- F21V21/14—Adjustable mountings
- F21V21/26—Pivoted arms
- F21V21/28—Pivoted arms adjustable in more than one plane
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B90/00—Instruments, implements or accessories specially adapted for surgery or diagnosis and not covered by any of the groups A61B1/00 - A61B50/00, e.g. for luxation treatment or for protecting wound edges
- A61B90/50—Supports for surgical instruments, e.g. articulated arms
- A61B2090/5025—Supports for surgical instruments, e.g. articulated arms with a counter-balancing mechanism
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B90/00—Instruments, implements or accessories specially adapted for surgery or diagnosis and not covered by any of the groups A61B1/00 - A61B50/00, e.g. for luxation treatment or for protecting wound edges
- A61B90/50—Supports for surgical instruments, e.g. articulated arms
- A61B2090/506—Supports for surgical instruments, e.g. articulated arms using a parallelogram linkage, e.g. panthograph
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B90/00—Instruments, implements or accessories specially adapted for surgery or diagnosis and not covered by any of the groups A61B1/00 - A61B50/00, e.g. for luxation treatment or for protecting wound edges
- A61B90/30—Devices for illuminating a surgical field, the devices having an interrelation with other surgical devices or with a surgical procedure
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61G—TRANSPORT, PERSONAL CONVEYANCES, OR ACCOMMODATION SPECIALLY ADAPTED FOR PATIENTS OR DISABLED PERSONS; OPERATING TABLES OR CHAIRS; CHAIRS FOR DENTISTRY; FUNERAL DEVICES
- A61G2203/00—General characteristics of devices
- A61G2203/10—General characteristics of devices characterised by specific control means, e.g. for adjustment or steering
- A61G2203/20—Displays or monitors
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16M—FRAMES, CASINGS OR BEDS OF ENGINES, MACHINES OR APPARATUS, NOT SPECIFIC TO ENGINES, MACHINES OR APPARATUS PROVIDED FOR ELSEWHERE; STANDS; SUPPORTS
- F16M2200/00—Details of stands or supports
- F16M2200/04—Balancing means
- F16M2200/044—Balancing means for balancing rotational movement of the undercarriage
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16M—FRAMES, CASINGS OR BEDS OF ENGINES, MACHINES OR APPARATUS, NOT SPECIFIC TO ENGINES, MACHINES OR APPARATUS PROVIDED FOR ELSEWHERE; STANDS; SUPPORTS
- F16M2200/00—Details of stands or supports
- F16M2200/06—Arms
- F16M2200/063—Parallelogram arms
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16M—FRAMES, CASINGS OR BEDS OF ENGINES, MACHINES OR APPARATUS, NOT SPECIFIC TO ENGINES, MACHINES OR APPARATUS PROVIDED FOR ELSEWHERE; STANDS; SUPPORTS
- F16M2200/00—Details of stands or supports
- F16M2200/06—Arms
- F16M2200/065—Arms with a special structure, e.g. reinforced or adapted for space reduction
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21W—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO USES OR APPLICATIONS OF LIGHTING DEVICES OR SYSTEMS
- F21W2131/00—Use or application of lighting devices or systems not provided for in codes F21W2102/00-F21W2121/00
- F21W2131/40—Lighting for industrial, commercial, recreational or military use
Definitions
- This invention relates generally to support arms for surgical theater systems and more particularly to support arms having a counterbalance arm to balance the weight of the supported object so that it can be suspended at a selected height without locking the arm.
- Surgical theater systems are floor, wall, or ceiling mounted systems including devices which can be positioned in desired locations within a surgical suite to maximize there accessability, utility, and or viewability.
- Examples of surgical light systems can be found in U.S. Patent Nos. 6,012,821 and 6,132,062 and U. S. Applications Serial Nos. 09/050,265; 09/050,529; 09/050,534 and 09/747,605 which are expressly incorporated herein by reference.
- Such surgical theater systems support devices such as surgical lights, monitors, cameras, and electronic instruments utilized by surgeons and operating room personnel during the performance of surgical procedures.
- the counterbalance arm includes a parallelogram linkage.
- U.S. Application Serial No. 09/747,605 shows a surgical theater system with a counterbalance arm which seeks to minimize vertical movement of a device after it has been positioned at a desired height by providing a counterbalance arm having frictional brakes engaging pivot pins about which the arm rotates.
- Counterbalance arms are well known devices incorporating counterweights or spring mechanisms which provide a vertical upward force to the distal end of a cantilevered arm to counteract the downward force exerted on the distal end of the cantilevered arm by the object supported. The forces create torques about the lower pivot axis of the counterbalance arm.
- the torque exerted on the counterbalance arm will be equal in magnitude to, but opposite in direction to, the torque exerted on the counterbalance arm by the weight. Recognizing that the ideal situation cannot always be achieved, U.S. Application Serial No. 09/747,605 compensates for the inequalities by applying a frictional force to the pivot axis which permits the torques of the weight and the spring members to be slightly unbalanced.
- the torque exerted by a weight hanging freely suspended from a fixed point on an arm is proportional to the sine of the angle formed between the vertical plane and the longitudinal axis of the arm.
- Springs and gas springs typically obey Hooke's law, at least while in the region of elasticity, so that the force exerted by the spring is proportional to its displacement from equilibrium.
- the spring is typically not mounted perpendicular to the longitudinal axis of the arm but rather couples to the distal end of the arm and to an end of a spring link.
- the spring link is typically pivotally mounted at a first end to a fixed location relative to the pivot axis of the proximal end of the counterbalance arm and mounted at the other end to slide within a slot formed in the counterbalance arm.
- the spring is typically pivotally mounted to the sliding end of the spring link and pivotally mounted to the second end of the counterbalance arm.
- the spring exerts a force directed substantially along the longitudinal axis which is converted by the spring link into components of force parallel to and perpendicular to the longitudinal axis of the spring link.
- the component parallel to the longitudinal axis creates strain along the link which is assumed to be incompressible.
- the component perpendicular to the longitudinal axis of the spring link induces the pivot pin sliding in the slot into engagement with the upper edge of the slot so that the perpendicular component reduces to a component perpendicular to the longitudinal axis of the counterbalance arm and a component parallel to the longitudinal axis of the counterbalance arm.
- second parallel link is formed so that a pin extends through the longitudinal slot and a roller which engages an upper wall of the second parallel link to transfer this force to the second parallel link through the roller rather than through engagement of the pin with the upper wall of the slot.
- the component perpendicular to the longitudinal axis of the counterbalance arm creates a torque about the pivot axis at the proximal end of the counterbalance arm which is preferably substantially equal in magnitude to, but opposite in direction to, the torque induced by the weight.
- Hooke's Law provides a linear equation relating the force exerted by an elastic medium to the displacement from equilibrium of the medium. In gas springs the displacement can be represented by the stroke length of the piston. Hooke's Law states that force (F) of a spring is equal to the displacement of the spring from its equilibrium position (x) times a spring constant (k) or:
- a counterbalance a m which includes an adjustment pin set at an angle to the vertical for modifying the offset of the proximal end of a spring link from the proximal end of a first parallel link so that the proximal end of the spring link is not mounted at a fixed location relative to the pivot axis at the proximal end of the counterbalance arm.
- the angle that adjustment pin forms with the vertical introduces a mechanical disadvantage to the spring link/spring/slot combination to compensate for increased spring forces generated when the counterbalance arm is lowered from the raised to a lowered position.
- the counterbalance arm includes a first parallel link, a second parallel link, a spring link and a spring.
- the first parallel link is mounted at the proximal end to pivot about a proximal pivot axis and mounted at a distal end to pivot around a distal pivot axis.
- the second parallel link is mounted at its proximate end for pivotal movement about a second proximate pivot axis and at its distal end for pivotal movement about a second distal pivot axis.
- the displacement between the first and second proximal pivot axes and the displacement between the first and second distal pivot axes is substantially equal to maintain the parallel relationship between the first and second parallel links.
- the spring link is mounted at its proximal end to pivot about a third proximal axis and at its distal end to slide relative to the second parallel link.
- the third proximal axis extends through a pivot pin which is movable relative to the first proximal pivot axis to adjust the displacement between the third and first proximal pivot axes.
- Fig. 1 is a perspective view of a surgical theater system having a monitor mounted by a monitor mount to a counterbalance arm;
- Fig. 2 is a front plan view of the counterbalance arm and monitor mount of Fig. 1;
- Fig. 3 is a sectional view along line 3-3 of the counterbalance arm and monitor mount of Fig. 2;
- Fig. 4 is a detailed view of a portion of the counterbalance arm enclosed in reference circle 4 of Fig. 3;
- Fig. 5 is an exploded, view of the counterbalance arm of Fig. 1;
- Fig. 6 is a cross-sectional view of the counterbalance arm in its raised position showing the adjustment screw rotated completely in a first direction to place the third proximal pivot axis extending through the proximal end of the spring links in its uppermost position;
- Fig. 7 is a cross-sectional view of the counterbalance arm in its raised position showing the adjustment screw rotated completely in a second direction to place the third proximal pivot axis extending through the proximal end of the spring links in its lowermost position;
- Fig. 8 is a cross-sectional view of the counterbalance arm of Fig. 7 showing the arm pivoted downwardly about the first proximal pivot axis so that the arm is in a substantially horizontal position;
- Fig. 9 is a cross-sectional view of the counterbalance arm of Fig. 7 showing the arm pivoted downwardly about the first proximal pivot axis so that the arm is in its lowered position.
- a surgical theater system 10 in accordance with one embodiment of the disclosed device is provided for mounting a device 12, such as a monitor 14, within a surgical suite so that the device can be moved horizontally and vertically within the suite to facilitate maximum utilization of device 12.
- a device 12 such as a monitor 14
- surgical theater system 10 permits monitor 14 to be positioned for optimal viewing by the surgeon without interfering with the surgical procedure.
- other devices 12, such as surgical lights, cameras, etc. to be mounted to surgical theater system 10 and for surgical theater system to be located in other rooms of a facility in which the device 12 is to be used.
- surgical theater system 10 is a ceiling mount system having a central hub 16 mounted for rotation about a rotational axis 18 extending through the hub 16 and a structural support in the ceiling 20.
- a boom 22 is mounted to hub 16 and includes a proximal end 23, a distal end 24, a horizontally-extending portion 26, and a vertically-extending portion 28.
- Boom 22 is mounted at proximal end 23 to hub 16.
- Horizontally-extending portion 26 extends radially from hub 16.
- Vertically-extending portion 28 extends downwardly from horizontally-extending portion 26 so that distal end 24 of boom 22 is horizontally and vertically displaced from hub 16.
- Counterbalance arm assembly 30 is mounted at its proximal end 32 to distal end 24 of boom 22 for rotation about an axis 34 extending longitudinally through vertically-extending portion 28 of boom 22.
- Counterbalance arm assembly 30 includes a bearing housing 36, a proximal arm hub 38, a counterbalance arm 40, a distal arm hub or monitor pivot 48, and a monitor mount assembly 50.
- Counterbalance arm 40 pivots about proximal pivot axis 54 and distal pivot axis 56 so that a device 12 attached to monitor mount assembly 50 can be raised and lowered with respect to the boom 22.
- Monitor mount assembly 50 is mounted to monitor pivot 48 for rotation about rotation axis 58 permitting monitor 14 to be positioned at a desirable location within suite.
- Counterbalance arm 40 includes an arm housing 42 which acts in the illustrated embodiment as a first parallel link, a counterbalance arm weldment 44 which acts in the illustrated embodiment as a second parallel link, a plurality of spring links 46, and a gas spring 52.
- Arm housing or first parallel link 42 is mounted at its proximal end 60 to proximal arm hub 38 for pivotal movement relative to proximal arm hub 38 about a first proximal pivot axis 54.
- Arm housing or first parallel link 42 is mounted at its distal end 62 to distal arm hub or monitor pivot 48 for pivotal movement relative to monitor pivot 48 about a first distal pivot axis 56.
- Arm weldment or second parallel link 44 is mounted at its proximal end 64 to proximal arm hub 38 for pivotal movement relative to proximal arm hub 38 about a second proximal pivot axis 66.
- Arm weldment or second parallel link 44 is mounted at its distal end 68 to distal arm hub or monitor pivot 48 for pivotal movement relative to monitor pivot 48 about a second distal pivot axis 70.
- the displacement 72 between first and second proximal pivot axes 54, 66 is fixed as is the displacement 74 between first and second distal pivot axes 56, 70.
- arm weldment or second parallel link 44 is formed from a rectangular metal tube having a top wall 80, bottom wall 82, and side walls 84, 86.
- Metallic ears 88, 90 are coupled to side walls 84, 86.
- two proximal ears 88 are attached to the side walls 84, 86 of, and extend longitudinally beyond, the tube at the proximal end 64 of arm weldment 44.
- two distal ears 90 are attached to the side walls 84, 86 of, and extend longitudinally beyond, the tube at the distal end 68 of arm weldment 44.
- Each proximal ear 88 is formed to include a pivot pin-receiving hole 92.
- Each distal ear 90 is formed to include a pivot pin-receiving hole 94 and an attachment pin-receiving hole 96.
- a second proximal pivot pin 98 extends through pivot pin-receiving hole 92 to couple proximal end 64 of arm weldment 44 to proximal arm hub 38 for pivotal movement relative to proximal arm hub 38 about second proximal pivot axis 66.
- a second distal pivot pin 100 extends through pivot pin-receiving hole 94 to couple distal end 68 of arm weldment 44 to distal arm hub 48 for pivotal movement relative to distal arm hub 48 about second distal pivot axis 70.
- Each attachment pin 102 extends through each attachment pin- receiving hole 96 and the distal end clevis 104 of gas spring 52 to pivotally couple gas spring 52 to arm weldment 44.
- Each side wall 84, 86 of rectangular tube is formed to include a longitudinally-extending slot 106 having an upper wall 108, lower wall 110, distal end wall 112 and proximal end wall 114.
- Upper, lower, distal end and proximal end walls 108, 110, 112, 114 retain a connection pin 116 which is received for sliding movement between the proximal end wall 112 and distal end wall 114.
- Connection pin 116 extends through slot 106, connection pin-receiving hole 124 in spring links 46 clevis 130 of gas spring 52 and a plurality of rollers 117. Rollers 117 are sized to be received in the interior of arm weldment 44 to facilitate movement of connection pin within slot and to transfer forces exerted on connection pin through the body of roller to upper wall of arm weldment 44. While described herein as being urged against top wall 108 of slot 106 to transfer perpendicular forces to arm weldment 44, in the illustrated embodiment connection pin does not engage top wall 108 of slot 106, rather connection pin 116 transfers forces to arm weldment through rollers 117. While illustrated as an arm weldment 44, it is within the teaching of the disclosure for second parallel link 44 to be formed from a single link or a plurality of links.
- each spring link 46 includes a proximal end 118 formed to include a pivot pin-receiving aperture 120 and a distal end 122 formed to include a connection pin-receiving aperture 124.
- a third pivot pin 126 through which third proximal pivot axis 128 extends, is pivotally coupled to proximal end of spring link 46 by shoulder bolts 130 received in each of the pivot pin-receiving apertures 120 in the proximal end of each spring link 46 and threaded holes 197 in opposite ends of third proximal pivot pin 126.
- Connection pin 116 extends through each connection pin-receiving aperture 124 and through slot 106 in arm weldment 44 to slidingly couple distal end 122 of each spring link 46 to arm weldment 44.
- Connection pin 116 also extends through proximal end clevis 130 of gas spring 52 to pivotally couple proximal end of gas spring 52 to spring links 46 and slidingly couple proximal end of gas spring 52 to arm weldment 44. While the illustrated embodiment includes two spring links 46, it is within the teaching of the disclosure for a single spring link, a spring link weldment or assembly, or a plurality of spring links to be provided.
- gas spring 52 is provided.
- Gas springs are well known in the art and are commercially available from several sources.
- gas spring 56 is a series 16 gas spring available from Suspa
- Gas spring 52 includes a cylinder housing 132 having a clevis 130 extending from the proximal end and a rod 134 extending into the cylinder housing 132 and having a clevis 104 at the distal end.
- Connection pin 116 extends through connection pin-receiving apertures 124 in the distal end 122 of spring links 46, slots 106 in arm weldment 44 and the clevis 130 at the proximal end of the cylinder housing 132 of the gas spring 52 to pivotally couple the gas spring 52 to the distal end 122 of the spring links 42 and slidingly couple the gas spring 52 to arm weldment 44.
- Connection pin 116 extends through connection pin-receiving holes 124 in the distal ears 90 of arm weldment 44 and through clevis 104 at the distal end of the rod 134 of gas spring 52 to pivotally couple distal end of gas spring 52 to arm weldment 44 at a location between distal end wall 112 of slot 106 and distal end 68 of arm weldment 44. While the terms proximal and distal end are used in conjunction with the gas spring 52, those skilled in the art will recognize that the orientation of the gas spring 52 is not critical to the invention. The terms proximal and distal are used in this written description to indicate relative proximity, following the various arms of the surgical suite apparatus, to the mounting location.
- proximal and distal distinguish between portions of various components (similar to the terms “first” and “second”) and are not intended to indicate proximity to any other component of a surgical theater apparatus.
- springs 136 All such devices are generally referred to herein as springs 136.
- the proximal hub 38 is formed to include a shaft 138 and a hub portion 140.
- shaft 138 is a tube coupled at its distal end to the hub portion 140.
- Shaft 138 has a length 142 sufficient to extend substantially through bearing housing 36, an outside diameter 144 sized to receive tapered roller bearings 146 and a RulonTM bearing 148, and an inside diameter 150 sized to receive the power and signal cable 152 of slip ring assembly 154.
- proximal end 156 of shaft 138 is threaded to receive a locknut with key 158.
- Bearing housing 36 is formed to include an aperture 160 extending longitudinally therethrough. Aperture 160 includes a central bore 162 and two counterbores 164 at opposite ends of the bearing housing 36.
- Counterbores 164 have an inside diameter sized to receive bearing races 66 on which the rollers of the tapered roller bearings 146 ride and a brake ring 168 against which RulonTM bearing 148 is pulled to adjust the ease of rotation of counterbalance arm assembly 30 about rotation axis 34.
- RulonTM bearing 148, brake ring 168, races 166 and tapered roller bearings 146 are secured within bearing housing 36 by lock washer with key 170 and locknut with key 158.
- Cable 152 of the slip ring subassembly extends through shaft 138 and through an aperture 172 in hub portion 140 so that power and electrical signals can be conveyed to monitor 14.
- hub portion 140 includes a disk portion 174 and a protrusion 176 to which shaft 138 is attached.
- Disk portion 174 is formed to include a centrally located first pivot pin-receiving hole 178, a second pivot pin-receiving hole 180 offset radially from first pivot pin-receiving hole 178, a nut-receiving aperture 182, a pivot pin-receiving aperture 184, an adjustment screw head-receiving counterbore 186, and an adjustment screw shaft-receiving bore 188.
- the foci of first and second pivot pin-receiving holes 178, 180 are located on a diametrical line 190 substantially parallel to rotation axis 34.
- Adjustment screw shaft-receiving bore 188 extends from the peripheral edge 192 of disk portion 174 radially inward through adjustment screw head-receiving counterbore 186, pivot pin-receiving aperture 184 and nut-receiving aperture 182, all of which are coaxial and concentric about radial line 194.
- Third pivot pin 126 includes a longitudinal axis serving as third proximal pivot axis 128 and has an outside diameter sized to be received in pivot pin receiving aperture 184.
- Threaded holes 197 extend longitudinally inwardly from opposite ends of third pivot pin 126 to receive shoulder bolts 196 which extend through pivot pin- receiving apertures 120 of spring links 46 to pivotally couple proximal ends 118 of spring links 46 to proximal hub 38 for movement about third proximal pivot axis 128.
- Third pivot pin 126 includes a threaded hole 198 extending radially therethrough.
- Third pivot pin 126 is received in pivot pin-receiving aperture 120 so that longimdinal axis 128 extends perpendicularly through disk portion 174 and threaded hole 198 is aligned with adjustment screw shaft-receiving bore 188.
- Distal hub 48 includes a disk portion 200 and a mounting protrusion 202.
- Disk portion 202 is formed to include a first distal pivot pin-receiving hole 204 and a second distal pivot pin-receiving hole 206.
- first distal pivot pin- receiving hole 204 is concentrically located with respect to disk portion 200.
- Second distal pivot pin-receiving hole 206 is radially displaced from first distal pivot pin- receiving hole 204 by a displacement 208.
- the foci of first and second distal pivot pin-receiving holes 204, 206 are located on a diametrical line 210 substantially parallel to rotation axis 58.
- Mounting protrusion 202 is formed to include an aperture 212 having an inside diameter sized to receive a portion of a slip ring 214 and cable 156 of slip ring subassembly. Aperture 212 is concentric about rotation axis 58.
- Arm housing 42 includes a tubular central section 214 with a pair of laterally spaced apart proximal ears 216 and a pair of laterally spaced apart distal ears 218 extending longitudinally beyond central section 214.
- Arm housing 42 is shown as a monolithic structure but it is within the teaching of the disclosure for arm housing 42 to be formed from multiple components.
- Each proximal ear 216 includes an outer rim 220 coupled by a plurality of spokes 222 to a central hub 224 formed to include a first proximal pivot pin-receiving hole 226 extending therethrough.
- each distal ear 218 is cup-shaped with a central first distal pivot pin-receiving hole 228 extending therethrough.
- First proximal pivot pin 230 extends through each first proximal pin-receiving hole 226 of arm housing 42 and the first proximal pivot pin- receiving hole 180 of proximal hub 38 to couple arm housing 42 to proximal hub 38 for pivotal movement about first proximal pivot axis 54.
- First distal pivot pin 232 extends through each first distal pin-receiving hole 228 of arm housing 42 and the first distal pivot pin-receiving hole 204 of distal hub 48 to couple arm housing 42 to distal hub 48 for pivotal movement about first distal pivot axis 56.
- First proximal pivot pin 230 and first distal pivot pin 232 intersect longitudinal axis 76 of arm housing 42 so that arm housing 42 acts as a parallel link or parallel link assembly extending between first proximal pivot axis 54 and first distal pivot axis 56.
- tubular central section 214 is sized to receive arm weldment 44, spring links 46 and gas spring 52 and their associated connecting pins and mounting hardware therein.
- arm housing 42 protects arm weldment 44, spring links 46 and gas spring 52 and their associated connecting pins and mounting hardware from the environment and permits counterbalance arm 40 to be easily cleaned.
- counterbalance arm 40 comprises caps 234 and plugs 236 to further enclose arm weldment 44, spring links 46 and gas spring 52 and their associated connecting pins and mounting hardware and the various pivot and connection pins coupling these various components to the proximal and distal hubs 38 and 48, respectively.
- Monitor mount assembly 50 includes an upper tube monitor cradle weldment 238, a lower monitor tube/handle weldment 240 and a handle mandrel 242.
- Upper tube monitor cradle weldment 238 includes a proximal rotation hub 244, a horizontally extending arm portion 246, a downwardly extending arm portion 248 and a distal rotation hub 250.
- Lower monitor tube/handle weldment 240 includes a rotation hub 252, an L-shaped bracket arm 254, an internally threaded handle receiving hub 256, and a monitor bracket 258.
- Handle mandrel 242 is formed to include a longitudinally extending aperture 260 communicating with a switch- receiving hole 262 in the distal end 264.
- Handle mandrel 242 is externally threaded at the proximal end 266 to facilitate connection with handle receiving hub 256 of lower monitor tube/handle weldment 240.
- Mounting protrusion 202 of distal hub 48 is mounted to proximal rotation hub 244 of monitor mount assembly 50 for rotational movement of monitor mount assembly 50 about rotation axis 58.
- thrust needle bearing 268 is sandwiched between an upper thrust washer 270 received in a cavity in the distal hub 48 of counterbalance arm 40 and a lower thrust washer 272 received in a cavity in the proximal rotation hub 244 of the monitor mount assembly 50.
- a bearing cover 276 is provided between distal hub 48 and proximal rotation hub 244 to protect thrust needle bearings 268.
- a spindle 278 extends through proximal rotation hub 244, steel washer 280, flanged bushing 282, thrust needle bearings 268, thrust washers 270, 272 and into the aperture 212 of distal hub 48 where it is secured by a set screw 284 to distal hub 48.
- a lower cap 285 is provided to cover lower end of proximal rotation hub 244. As shown, for example, in Fig. 3, a second slip ring 286 of slip ring assembly 154 is received in aperture 288 of proximal rotation hub 244 to facilitate rotation of monitor mount assembly 50 about rotation axis 58 and transfer of signals and power through slip ring assembly 154 to monitor 14.
- horizontally-extending arm portion 246 and downwardly-extending arm portion 248 are tubes coupled together in an L- shape.
- Aperture 288 of proximal rotation hub 244 communicates with the lumen 290 of horizontally-extending arm portion 246 and downwardly-extending arm portion 248 to permit a second signal and power cable 292 of slip ring assembly 154 to extend from proximal rotation hub 244 to distal rotation hub 250.
- the lumen 290 of downwardly-extending arm portion 248 communicates with an aperture 294 extending horizontally through distal rotation hub 250 to permit second signal and power cable 292 of slip ring assembly 154 to extend into distal rotation hub 250.
- Lower monitor tube/handle weldment 240 is mounted at rotation hub 252 to distal rotation hub 250 of upper tube monitor cradle weldment 238 to permit rotational movement of lower monitor tube/handle weldment 240 with respect to upper tube monitor cradle weldment 238 about rotation axis 296. While mounted for rotational movement about rotation axis 296, the presence of stops (not shown) limits movement of lower monitor tube/handle weldment 240 with respect to rotation axis 296 to pivotal movement having 145 degrees of travel. Stops may be positioned to provide a greater or lesser range of pivotal motion within the teachings of the disclosure.
- thrust needle bearing 298 is sandwiched between a proximal thrust washer 300 received in a cavity in distal rotation hub 250 of upper tube monitor cradle weldment 238 and a distal thrust washer 302 received in a cavity in rotation hub 252 of lower monitor tube/handle weldment 240.
- a bearing cover 304 is provided between distal rotation hub 250 of upper tube monitor cradle weldment 238 and rotation hub 252 of lower monitor tube/handle weldment 240 to protect the thrust needle bearings 298.
- a spindle 304 extends through rotation hub 252 of lower monitor tube/handle weldment 240, steel washer 306, flanged bushing 308, thrust needle bearings 298, thrust washers 300, 302 and into aperture 294 of distal hub 250 of upper tube monitor cradle weldment 238 where it is secured by a set screw 310 to distal hub 250.
- End caps 312 are provided to enclose the outer ends of rotation hub 252 of lower monitor tube/handle weldment 240 and distal rotation hub 250 of upper tube monitor cradle weldment 238, respectively.
- L-shaped bracket arm 254 of lower monitor tube/handle weldment 240 is illustratively comprised of tubes coupled together in an L-shape.
- Aperture 314 of rotation hub 252 of lower monitor tube/handle weldment 240 communicates with the lumen 316 of L-shaped bracket arm 254 to permit second signal and power cable 292 of slip ring assembly 154 to extend from rotation hub 252 to the distal end 318 of L-shaped bracket arm 254.
- Signal and power cable 292 extends from distal end 318 of L-shaped bracket arm 254 and is electrically coupled to a 23-pin connector block 320.
- a headed pin 322 is coupled to monitor bracket 258 to facilitate attachment of a monitor cable assembly 324 to monitor bracket 258.
- Monitor cable assembly 324 mates with 23-pin connector block 320 so that power and video signals can be provided to monitor 14.
- monitor cable assembly 324 includes a plurality of cables tenmnating in connectors adapted for attachment to inputs of a monitor 14.
- a control wire 326 is coupled to monitor cable assembly 324 and extends through L-shaped bracket arm 255, rotation hub 252, handle receiving hub 256 and handle mandrel 242. Control wire 326 terminates in a switch 328 through which operation of the monitor 14 can be controlled.
- third pivot axis 128 may be longitudinally moved within pivot pin-receiving aperture 184 by a distance 330 along radially extending line 194 between an uppermost position 332 and a lowermost position 334 by movement of third pivot pin block 126 through rotation of adjustment screw 336.
- Radial line 194 forms an angle 338 with the diametrical line 190 extending through the first and second proximal pivot axes 54, 66.
- angle 338 between radial line 194 and diametrical line 190 is approximately 18.43 degrees.
- a gas spring 52 which exhibits approximately a 9.5% difference in force between its initial compressed length and its full-stroke length.
- the angle 338 formed between the radial line 194 and the diametrical line 190 is fixed to substantially reduce, or hopefully eliminate, the difference in force exerted by the gas spring 52 as counterbalance arm is moved between its raised and lowered positions.
- angle 338 may be increased or decreased in accordance with the invention to facilitate other springs exhibiting different "stroke length to force" characteristics.
- angle 338 has a measure of 18.43 degrees.
- the measure of the angle 338 was determined through iterations of experiments whereby a 3-D computer generated model of counterbalance arm with a known weight attached thereto was generated using known measurements of components of counterbalance arm 40.
- the model was generated by introducing the arm lengths, displacements between the first and second proximal and distal pivot axes, the displacement between the top wall of slot 106 and longitudinal axis of second parallel link 44, the displacement between the pivot pin-receiving aperture and connection pin-receiving aperture 124 of spring link 42, the displacement between the diametrical line 210 and rotation axis 58 of the illustrated embodiment of counterbalance arm 40.
- the location of the third pivot axis with respect to the first and second pivot axes could be changed and the modeled arm pivoted to various locations within its pivotal range of motion.
- the angle formed by spring link 42 with respect to longitudinal axis 78 of second parallel link 44 could be measured as could the location of connecting pin 116 which establishes the displacement of the rod of gas spring 52 from its equilibrium position, the length of the moment arm through which spring link 42 and gas spring generate torque, and the arm angle formed by counterbalance arm.
- the resultant torque on the arm for various positions could be calculated and plotted against the displacement from diametrical line 190 of third pivot axis 128.
- the arm was positioned in its raised position (38.68 degrees above the horizontal or 51.32 degrees from vertical).
- the third pivot axis 128 was moved to an initial location where a substantial equilibrium state was obtained.
- the counterbalance arm was pivoted to its lowered position (38.68 degrees below the horizontal or 128.68 degrees from the vertical).
- the resultant net torque on the arm in the lowered position was determined and plotted against the position of third pivot axis 128. Additional torque calculations were taken at various positions between the raised and lowered positions.
- a new location of third pivot axis 128 was chosen and the process repeated.
- Third pivot axis was moved to various locations, but only those locations which produced minimal resultant torques were plotted. A straight line was drawn through the plotted points to establish the appropriate measurement of angle 338.
- angle 338 can be determined by other methods so long as the appropriate mechanical disadvantage is provided.
- Angle 338 can be determined by experimentation with a physical model or through mathematical modeling. In generating a mathematical model, or in calculating torques generated by the weight and spring, the following will be helpful.
- first and second distal pivot axes 56 and 70 are displaced from one another by distance 208 (in the illustrated embodiment equal to 0.75") and first and second and proximal pivot axes 54 and 66, respectively, are displaced from one another by displacement 72 (in the illustrated embodiment equal to 0.75") substantially equal to distance 208.
- Displacement 72 is measure along diametrical line 190 and displacement 208 is measured along diametrical line 210.
- Diametrical line 210 is parallel or substantially parallel to rotation axis 58 which is presumed to be vertical.
- Diametrical line 190 is parallel or substantially parallel to rotation axis 34 which is presumed to be vertical.
- Distance 191 between diametrical line 190 and rotation axis 34 is fixed (in the illustrated embodiment
- Weight of monitor mount assembly 50 and device 12 is assumed to be a determinable constant acting vertically downwardly along rotation axis 58 to generate a torque about first proximal pivot axis 54.
- Weight acts on a moment arm having a length 362
- Arm housing or first parallel link 42, arm weldment or second parallel link 44, proximal arm hub 38 and distal arm hub 48 are configured such that pivotal movement of counterbalance arm 40 about first proximal pivot axis 54 is limited.
- the upper surface of arm housing or first parallel link 42 prohibits rotation of counterbalance arm 40 upwardly beyond a point at which upper surface of arm housing 42 would contact the outer surface of proximal hub 38 or bearing housing 36.
- hub 38 and first parallel link 42 are formed to include stops (not shown) limiting pivotal movement of counterbalance arm 40 between an upper limit or raised position (wherein the arm angle ⁇ is 38.68 degrees above horizontal or 51.32 degrees from vertical) and a lower limit or lowered position (wherein the arm angle ⁇ is 38.68 degrees above horizontal or 128.68 degrees from vertical).
- Weight of monitor mount assembly 50 and device 12 thus acts on a moment arm having the length C IAI ) 362 of the distance (L lp] ) 55 (in the illustrated embodiment 26") between first proximal and distal axes 54 and 56, respectively, plus the additional distance required to extend this longitudinal axis to intersect rotation axis 58. Since rotation axis 58 and the diametrical line 210 through the first and second distal axes 56 and 70, respectively, is set at a fixed displacement (D) 211 and the longitudinal axis forms an angle ⁇ with the vertically oriented line 56 and axis 58, the additional distance is D/sin ⁇ .
- moment arm has a length 362 : Since the weight acts vertically downwardly, the component of the weight perpendicular to the moment arm is W * sin ⁇ .
- the force exerted by the gas spring 52 acts on connection pin 116 extending through slot 106 and connection pin-receiving aperture 124 in distal end 122 of spring link 46.
- Spring link 46 and connection pin 116 and top wall 108 of slot 106 act to reduce the spring force to a component along the longitudinal axis of the spring link 46 and a force perpendicular to the longitudinal axis 78 of second parallel link 44.
- Counterbalance arm 40 is formed to maintain longitudinal axis 78 of second parallel link 44 parallel to longitudinal axis 76 of first parallel link 42.
- Proximal hub 38 is formed to fix first and second proximal pivot axes 54, 66 so that second pivot axis 66 is always vertically above first pivot axis 54 and displaced from first pivot axis 54 by distance 72.
- Distal hub 48 is formed to fix first and second distal pivot axes 56, 70 so that second pivot axis 70 is always vertically above first pivot axis 56 and displaced from first pivot axis 56 by distance 208.
- top wall 108 of slot 106 is displaced from longitudinal axis 78 of second parallel link 42 by a displacement of 0.125". This displacement is minimal compared to other relevant lengths, distances and displacements and may be ignored in modeling counterbalance arm 40 with little error introduction.
- the force perpendicular to the longitudinal axis 78 of second parallel link 44 generates a torque in the opposite direction from the torque generated by the weight W.
- the force perpendicular to the longitudinal axis 78 of second parallel link 44 may be treated for modeling purposes as a force perpendicular to the longitudinal axis 76 of second parallel link 42 and as generating a torque in the opposite direction from the torque generated by the weight W.
- the focus of angle 332 must be displaced downwardly by the distance 72 between the first and second proximal pivot pins
- the device disclosed herein takes advantage of offsetting the third pivot axis 128 downwardly from the first and second proximal pivot axes 54 and 66, respectively and inwardly between the line 190 intersecting the first and second proximal pivot axes 54 and 66 and the line 210 intersecting the first and second distal pivot axes 56 and 70 respectively to provide a mechanical disadvantage to the combination of spring link 46 and spring 136 through the range of pivotal motion of counterbalance arm 40.
- the mechanical disadvantage compensates for the increased force exerted by spring 136 resulting from its further displacement from equilibrium during pivotal movement of counterbalance arm 40 between its upper limit of pivotal motion and its lower limit of pivotal motion.
- counterbalance arm 40 is shown in the raised position with adjustment screw 336 rotated so that the third proximal pivot axis 128 is in its uppermost position causing the spring 136 to exert its strongest initial force. Wlienever counterbalance arm 40 is in its raised position, i.e.
- connection pin 116 extending through connection pin-receiving hole 124 in distal end 122 of spring links 46 is at its minimal displacement 350 from proximal end wall 114 of slot 106.
- the minimal displacement 350 of connection pin 116 from proximal end wall 114 differs depending on the location at which the third proximal pivot axis 128 is set. When the third proximal pivot axis 128 is set at its uppermost position, as shown, for example, in Fig. 6, the minimal displacement 350 of connection pin 116 from proximal end wall 114 of slot 106 is at its maximum value 352.
- Distal clevis 104 of rod 134 pivots about pivot pin 102 which is in a fixed position relative to arm weldment 44 and proximal clevis 130 of cylinder housing 132 is movable longitudinally with respect to arm weldment 44.
- third proximal pivot axis 128 is in its uppermost position and the minimal displacement 350 of connection pin 116 from proximal end wall 114 is at its maximum value 352
- the cylinder head within gas spring 52 has been urged by rod 134 to begin compressing gas in the cylinder housing 132 by a maximum initial value causing the force exerted by the gas spring 52 to be at a maximum initial value.
- counterbalance arm 40 is shown in the raised position with the adjustment screw 336 rotated so that the third proximal pivot axis 128 is in its lowermost position causing the spring 136 to exert its weakest initial force.
- the third proximal pivot axis 128 is set at its lowermost position, as shown, for example, in Fig. 7, the minimal displacement 350 of connection pin 116 from proximal end wall 114 of slot 106 is at its minimum value 354.
- Distal clevis 104 of rod 134 pivots about pivot pinl02 which is in a fixed position relative to arm weldment 44 and proximal clevis 130 of cylinder housing 132 is movable longitudinally with respect to arm weldment 44.
- connection pin 116 extending through connection pin-receiving hole 124 in distal end 122 of spring links 46 and proximal clevis 130 of gas spring 52 slides longitudinally within slot 106 to increase the displacement 356 of comiection pin 116 from proximal end wall 114 of slot l06.
- rod 134 urges cylinder head of gas spring 52 further into cylinder housing 132 further compressing the gas in the cylinder and increasing the force exerted by the gas spring 52.
- first parallel link 42, second parallel link 44 and the fixed displacement 72 of first and second proximal pivot axes 54, 66, respectively, and first and second distal pivot axes 56, 70, respectively create a parallelogram linkage
- diametrical lines 190, 210 remain parallel throughout the pivotal range of counterbalance arm 40 about first proximal pivot axis 54. This permits monitor 14 mounted to monitor mount assembly 50 to remain properly oriented regardless of its vertical displacement from ceiling 20 of surgical suite.
- connection pin 116 As mentioned in the background, spring links 46, connection pin 116, slot 106 and gas spring 52 cooperate to urge connection pin 116 against upper wall 108 of slot 106 so that an upwardly directed vertical component of force is exerted at the location of connection pin 116 on second link 44.
- First parallel link 42 can be viewed as a lever with a fulcrum at the first proximal pivot axis 54.
- the vertical component of force exerted by the comiection pin 116 multiplied by the length 360 of the moment arm from the first proximal pivot axis 54 to the location of the comiection pin 116 be equal to the vertical component of the force exerted by the weight of the monitor mount and device and the length 362 of the moment arm between the first proximal pivot axis 54 and rotation axis 58.
- angle 338 between radial line 194 and diametrical line 190 is determined based on the length of the spring links 46, the length 362 of the moment arm from first proximal pivot axis 54 to rotation axis 58, the displacement 72 between the first and second parallel links, and the force to stroke length characteristics of spring 136, so that the proper mechanical disadvantage is provided to cause the torque exerted by the weight of the monitor mount assembly 50 and device 12 to the counterbalance arm 40 to be substantially equal to, but opposite in direction from, the torque applied by the connection pin 116 through the upper wall 108 of the slot 106 to counterbalance arm 40.
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Abstract
L'invention concerne système pour salle d'opération (10) qui comprend un bras orientable (22) tournant autour d'un moyeu (16) relié à un ensemble bras d'équilibrage (30) pourvu d'un bras d'équilibrage (40) et d'un ensemble de fixation de moniteur (50) conçu pour orienter horizontalement ou verticalement un moniteur (14) ou un autre dispositif (12) au sein de l'appareillage de la salle d'opération, et maintenir la hauteur verticale choisie. Le bras d'équilibrage (30) comprend un moyeu proximal (38), une première liaison parallèle (42), une seconde liaison parallèle, une liaison à ressort, un ressort et un arbre distal (48). Les premier (54), deuxième et troisième axes de pivotement s'étendent à travers le moyeu proximal (38), le troisième axe de pivotement étant mobile le long d'une ligne radiale formant un angle avec une ligne qui croise les premier (54) et deuxième axes de pivotement. La liaison à ressort est reliée au troisième axe de pivotement proximal, au ressort et à la seconde liaison parallèle.
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PCT/US2001/028731 WO2003025453A1 (fr) | 2001-09-14 | 2001-09-14 | Bras de support pour systeme de salle d'operation |
US10/489,555 US7097145B2 (en) | 2001-09-14 | 2001-09-14 | Support arm for a surgical theater system |
CA2460482A CA2460482C (fr) | 2001-09-14 | 2001-09-14 | Bras de support pour systeme de salle d'operation |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PCT/US2001/028731 WO2003025453A1 (fr) | 2001-09-14 | 2001-09-14 | Bras de support pour systeme de salle d'operation |
Publications (2)
Publication Number | Publication Date |
---|---|
WO2003025453A1 true WO2003025453A1 (fr) | 2003-03-27 |
WO2003025453B1 WO2003025453B1 (fr) | 2004-04-15 |
Family
ID=21742843
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/US2001/028731 WO2003025453A1 (fr) | 2001-09-14 | 2001-09-14 | Bras de support pour systeme de salle d'operation |
Country Status (2)
Country | Link |
---|---|
CA (1) | CA2460482C (fr) |
WO (1) | WO2003025453A1 (fr) |
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2008128556A1 (fr) | 2007-04-20 | 2008-10-30 | Carl Zeiss Surgical Gmbh | Dispositif d'arrêt pour équipement d'optique médicale, en particulier pour moniteur |
CN111134993A (zh) * | 2020-01-13 | 2020-05-12 | 河南大学淮河医院 | 一种外科护理换药车 |
US10653498B2 (en) | 2014-09-29 | 2020-05-19 | Stryker Corporation | Fiber optic and slip ring rotary joint for suspension arm |
US10656341B2 (en) | 2016-07-12 | 2020-05-19 | Stryker Corporation | Separable infinite rotation fiber optic and slip ring rotary joint for suspension arm |
WO2020159618A1 (fr) * | 2019-01-31 | 2020-08-06 | American Sterilizer Company | Bras d'équilibrage de charge pour système de support de dispositif médical |
US11660161B2 (en) | 2019-03-28 | 2023-05-30 | American Sterilizer Company | Medical device suspension system having cable management assembly |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN111388208B (zh) * | 2020-03-17 | 2022-08-30 | 中国人民解放军北部战区总医院 | 呼吸道传播性疾病患者救治用便携式隔离舱 |
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US4517632A (en) * | 1982-11-25 | 1985-05-14 | Delma- Elektro- Und Medizinische Apparatebau Gesellschaft Mbh | Operating theatre lamp |
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2001
- 2001-09-14 CA CA2460482A patent/CA2460482C/fr not_active Expired - Fee Related
- 2001-09-14 WO PCT/US2001/028731 patent/WO2003025453A1/fr active Application Filing
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US2941776A (en) * | 1957-05-13 | 1960-06-21 | Ritter Co Inc | Counterbalancing mechanism |
US4160536A (en) * | 1976-10-27 | 1979-07-10 | Jac. Jacobsen A/S | Counterbalanced arm |
US4166602A (en) * | 1978-05-18 | 1979-09-04 | Pennwalt Corporation | Counterbalancing mechanism for X-ray tubeheads |
US4523732A (en) * | 1980-09-18 | 1985-06-18 | Carl-Zeiss-Stiftung, Heidenheim/Brenz | Adjustable stand for optical observation instruments |
US4447031A (en) * | 1981-04-13 | 1984-05-08 | Positioning Devices, Inc. | Spring counterbalanced support arm system |
US4517632A (en) * | 1982-11-25 | 1985-05-14 | Delma- Elektro- Und Medizinische Apparatebau Gesellschaft Mbh | Operating theatre lamp |
US5025359A (en) * | 1990-03-16 | 1991-06-18 | American Sterilizer Company | Counterbalanced arm for a lighthead |
US5826846A (en) * | 1996-06-28 | 1998-10-27 | Hill-Rom, Inc. | Monitor arm with constant counterbalance |
US6012693A (en) * | 1998-02-19 | 2000-01-11 | Ergotron, Inc. | Multi-function display mounting system |
US6132062A (en) * | 1998-03-27 | 2000-10-17 | Hill-Rom, Inc. | Task light for a surgical light apparatus |
US6012821A (en) * | 1998-03-30 | 2000-01-11 | Hill-Rom, Inc. | Support arm for surgical light apparatus |
US6328458B1 (en) * | 1998-03-30 | 2001-12-11 | Hill-Rom Services, Inc. | Support arm for surgical light apparatus |
Cited By (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2008128556A1 (fr) | 2007-04-20 | 2008-10-30 | Carl Zeiss Surgical Gmbh | Dispositif d'arrêt pour équipement d'optique médicale, en particulier pour moniteur |
DE112007003460B4 (de) * | 2007-04-20 | 2013-11-07 | Carl Zeiss Meditec Ag | Haltevorrichtung für medizinisch-optische Ausrüstung, insbesondere für Monitor |
US10653498B2 (en) | 2014-09-29 | 2020-05-19 | Stryker Corporation | Fiber optic and slip ring rotary joint for suspension arm |
US10656341B2 (en) | 2016-07-12 | 2020-05-19 | Stryker Corporation | Separable infinite rotation fiber optic and slip ring rotary joint for suspension arm |
US10955620B2 (en) | 2016-07-12 | 2021-03-23 | Stryker Corporation | Separable infinite rotation fiber optic and slip ring rotary joint for suspension arm |
US11644624B2 (en) | 2016-07-12 | 2023-05-09 | Stryker Corporation | Separable infinite rotation fiber optic and slip ring rotary joint for suspension arm |
WO2020159618A1 (fr) * | 2019-01-31 | 2020-08-06 | American Sterilizer Company | Bras d'équilibrage de charge pour système de support de dispositif médical |
US11666412B2 (en) | 2019-01-31 | 2023-06-06 | American Sterilizer Company | Load balancing arm for medical device support system |
US11660161B2 (en) | 2019-03-28 | 2023-05-30 | American Sterilizer Company | Medical device suspension system having cable management assembly |
CN111134993A (zh) * | 2020-01-13 | 2020-05-12 | 河南大学淮河医院 | 一种外科护理换药车 |
CN111134993B (zh) * | 2020-01-13 | 2021-10-29 | 陶红 | 一种外科护理换药车 |
Also Published As
Publication number | Publication date |
---|---|
CA2460482A1 (fr) | 2003-03-27 |
WO2003025453B1 (fr) | 2004-04-15 |
CA2460482C (fr) | 2010-04-13 |
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