Patent Publication Number: US-5422552-A

Title: Automated actuator for sliding panels

Description:
BACKGROUND OF THE INVENTION 
     1. Field of the Invention 
     The present invention relates to devices that actuate sliding panels such as doors, windows and the like and, in particular, to those devices that are automated and removably mountable to the frame of the sliding panel without altering the frame, the surrounding wall structure or the floor. 
     2. Background of the Invention 
     Use of automated devices to open and close sliding doors, windows, or gates are known. See for example, U.S. Pat. Nos. 2,334,981 to Ackley, 3,403,474 to Spasoff, 3,533,188 to Jones et al., 3,890,744 to Galis, 3,981,203 to Williams, 4,050,189 to Peterson, 4,067,144 to Ogishi, 4,272,921 to Jorgensen, 4,322,913 to Himmer, 4,336,670 to Brutosky, 4,541,202 to Dockery, 4,577,577 to Eriksson, 4,604,826 to Sorbe, 4,885,872 to Chang et al., 4,891,111 to Yung, 4,893,435 to Shalit and The Horton Automatics publication having a 1988 reprint date. 
     U.S. Pat. No. 3,890,744 to Galis discloses a floor mounted apparatus for operating a sliding door. The apparatus includes a housing affixed to the floor with screws. An endless belt disposed within the housing includes a plate which extends from the housing to coact with a bracket affixed to the sliding door by screws. 
     U.S. Pat. No. 4,541,202 to Dockery discloses an apparatus for operating a sliding door by employing a pair of elongated bars. An end of one bar is secured to a stationery structure adjacent the door by bolts and an adjustable connection at an end of the other bar is secured to the sliding door frame by bolts. 
     U.S. Pat. No. 4,893,435 to Shalit discloses a device for automatically opening a sliding door and includes a housing attached by screws to the floor across the full width of the door. An endless belt disposed within the housing is attached to the sliding door at the lower portion thereof with a bracket. The bracket includes a plate having pressure-sensitive adhesive on both sides for attaching the plate to a select position on the door. 
     Sensing devices to control a sliding door are also known and are described in U.S. Pat. Nos. 4,621,452 to Deeg, 4,823,010 to Kornbrekke and 4,866,881 to Morrow et al. 
     The devices discussed above require, in most instances, intricate wiring and assembly steps for installation at a desired location for operation. In addition, all of the devices require that the door frame, and sometimes the sill or jamb, or surrounding wall area, be structurally altered for the devices to be mounted for operation. 
     When the known devices are removed from their original mounting, one or more of the surrounding wall area, frame, jamb or sill exhibit holes that were required to mount each device. If it is required that the device be remounted for operation, more than likely the existing holes and altered areas of the surrounding wall structure would have to be rebuilt or filled so that the devices could be retrofitted to the existing door frame assembly or wall structure for operation. 
     For example, U.S. Pat. Nos. 3,890,744, 4,541,202 and 4,893,435 require, in their respective applications, that the door frame or surrounding wall structure be breached when mounting the operator device for operation. U.S. Pat. No. 4,541,202 to Dockery requires that the door frame and surrounding wall structure be breached to mount the operator, despite disclosing that related devices require substantial reconstruction of the mounting track and surrounding structure. In this regard, Dockery has not really solved the problem identified of having a removably mountable sliding door operator that is retrofitable without altering the wall structure. 
     The known devices also rely on the structural integrity of the surrounding wall or door frame for mounting purposes, and consequently, these areas must be strong enough to support the known devices and withstand any structural alteration that may be required to mount the known devices. 
     The known devices also consist of many parts and in some cases, intricate electrical wiring and hydraulic systems which for the most part restrict their mounting to those individuals knowledgeable with the mounting requirements for these type of devices. Because of their complicated structure, the known devices do not lend themselves well to kit form for assembly and disassembly, storage and transport. 
     The devices disclosed in the Galis, Dockery and Shalit patents have the added disadvantage of being mounted such that they represent an obstacle to be avoided at or near the passageway provided by the sliding door. 
     OBJECTS AND SUMMARY OF THE INVENTION 
     It is therefore an object of the present invention to provide an automated actuator device to open and close a sliding panel, the device being manufactured in kit form to facilitate assembly and disassembly without tools, storage and transport. The sliding panel may be a door, window or the like, although by way of example, discussion of the present invention will be with respect to a sliding door. 
     It is another object of the present invention to provide an actuator device that is removably mountable at existing door jambs and door frames and adjustable thereto without altering the structure of the jamb, frame, wall area or floor. 
     It is still another object of the present invention to provide a device which actuates a sliding panel that is adapted to be moved, for example, from left to right or from right to left to control access through a passageway. 
     It is still another object of the present invention to provide a device which is positionable at the jamb of the door frame and which does not obstruct passage or the view through the door. 
     It is still another object of the present invention to provide a device which does not rely on the integrity of the surrounding wall structure for the device to be securely mounted to actuate the sliding door. 
     It is still another object of the present invention to provide a device which can be removably mounted to actuate a pocket door assembly. 
     It is still another object of the present invention to provide a device which ceases the sliding movement of the door when the door meets resistance and permits the door to be immediately engaged for movement after the resistance is no longer present. 
     It is still another object of the present invention to provide a device which senses the resistance at a drive means for the device to determine whether movement of the sliding door should continue. 
     It is still another object of the present invention to provide a device which is actuated by wireless transmission, proximity switches or motion detection devices either individually or in combination with each other. 
     All of the foregoing objects are achieved by the present invention which provides an automated actuator consisting of an apparatus for actuating a panel slidably mounted to open and close a passageway. The apparatus includes a support member having a first end and a second end, and preferably, a first assembly removably mounted to the first end of the support member and adapted to adjust the length of the support member for being braced at a side of the passageway. A second assembly is removably mounted to the support member and includes a drive mechanism. A third assembly is removably mounted to the second end of the support member and is adapted to move the panel between an open and close position to control access through the passageway. The third assembly includes an endless flexible member and opposed end portions, one of the opposed end portions being adapted to be removably mounted to and coact with the second assembly for the drive mechanism to engage the endless flexible member, while the other one of the opposed end portions extends to a position adjacent the panel to be actuated. A coupling assembly disengagingly couples the endless flexible member of the third assembly with the panel. The coupling assembly includes a first coupling member mounted to the endless flexible member, and a second coupling member removably mounted to the panel. The first and second coupling members are adapted for releasable engagement with each other. 
    
    
     BRIEF DESCRIPTION OF THE DRAWINGS 
     For a more complete understanding of the present invention, reference may be had to the following description of exemplary embodiments of the present invention considered in connection with the accompanying drawings, in which: 
     FIG. 1 is a perspective view of a preferred embodiment of the automated actuator of the present invention mounted to actuate a sliding panel such as a sliding door; 
     FIG. 2 is a fragmentary elevational view of the automated actuator in FIG. 1 mounted at the door frame to actuate the sliding door; 
     FIG. 3 is an exploded view of the elements of the automated actuator including a drive assembly housing for the actuator; 
     FIG. 3A is the exploded view of the elements shown in FIG. 3 and includes a second embodiment of a drive assembly housing for the actuator; 
     FIG. 4 is a perspective fragmentary view showing means for disengagingly securing the automated actuator to the sliding door for activation; 
     FIG. 4A is a perspective fragmentary view showing another embodiment of the means for disengagingly securing the automated actuator to the sliding door for activation; 
     FIG. 5 is an exploded view of a third embodiment of a drive assembly housing for the automated actuator; 
     FIG. 6 is an elevational view of a control panel for the embodiments of the drive assembly housing shown in FIGS. 3, 3A and 
     FIG. 7 is a flow chart of steps employed by circuitry to control the operation of the automated actuator; 
     FIG. 8 is a block diagram of the circuitry elements used to control the operation of the automated actuator; and 
     FIGS. 9A-9H effect a single complete view of a schematic wiring diagram of the circuitry elements shown in FIG. 8. 
    
    
     DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS 
     Referring to the drawings, where like elements of the present invention are identified by similar reference characters, in FIG. 1 an automated actuator 10 of the present invention is shown mounted at a sliding door assembly 12 in a wall structure 14 of a room. The sliding door assembly 12 is used to control ingress and egress between the room and a backyard, patio, another room, etc. 
     The sliding door assembly 12 is conventional and includes a door frame 16 having an upper track 18, a lower track 20 and opposed door jambs 22,24. A pair of door panels 26,28 are mounted within the door frame 16 between the upper track 18 and the lower track 20. The door panel 26 includes a frame 30 and a glass pane 32 and the door panel 28 includes a frame 34 and a glass pane 36. The door panel 26 is stationery, while the door panel 28 moves between closed and open positions along the tracks 18,20 to control the passageway between, for example the room and an exterior of the house. 
     A portion 38 of the wall structure 14 at one side of the door frame 16 may be formed with a pocket area partially represented by broken lines 40. The pocket area 40 is used where the actuator 10 and a substantial portion, if not all of the door panel 28 are to be recessed in the portion 38 of the wall structure, thereby permitting maximum use of the passageway 42, e.g. when wheel chairs are used or in warehouse applications. 
     The actuator 10 of the present invention controls the horizontal movement of the sliding panel 28. By way of example, the actuator 10 is adapted to be disposed at the door jamb 22 between the upper track 18 and the lower track 20 so that it is substantially hidden from view from the outside of the house and unobtrusive from the inside of the room. In addition, the actuator 10 does not obstruct the floor 44 adjacent the sliding door assembly 12 and the passageway 42. 
     The actuator 10 is triggered from the inside or outside of the house by a hand-held radio transmitting device 46, although other devices may be used, such as a bump switch 48 mounted to the inside and/or outside of the panel 28, a motion detection device 50 mounted adjacent the sliding door assembly 12, or a proximity switch 52 disposed on the floor 44 as a mat positioned in front of the passageway 42. These devices may be used individually or in combination with each other. 
     Referring also to FIG. 2, the actuator 10 is shown disposed between the upper track 18 and the lower track 20 of the door frame 16 and positioned with respect to the door jamb 22. The actuator 10 is adapted to be disposed for operation at either one of the door jambs 22,24. The actuator 10 is removably mounted to the door frame 16 at a side opposite to where the sliding panel 28 is positioned for closing off the passageway 42. 
     In FIG. 3 the elements of the actuator 10 are shown. The actuator 10 of the present invention includes a longitudinal member 54 as a support column which is preferably formed as a single continuous piece to provide rigidity and added support for the actuator 10. Alternatively, the support column 54 is formed as a plurality of interlocking columnar sections 54a,54b to be assembled for mounting and disassembled for storage and transport. When the support column 54 is assembled from two or more columnar interlocking sections 54a,54b, an end 56 of one of the sections 54a will have a reduced diameter for being inserted into a receiving end 58 of the section 54b for a snug friction fit. The support column 54 is adapted for use in any position such as when being used with six or eight foot doorways, which is the size frequently used for residential and commercial buildings. However, the actuator 10 can be used with larger doorways by merely extending the length of the support column 54. A lower end 60 of the support column 54 is adapted to receive an assembly 62 for adjusting the length and therefore the height of the support column 54 with respect to the door jamb 22 and the upper and lower tracks 
     FIG. 3 shows the assembly 62 to include a lower support plate 64 or shoe which is sized and shaped to fit into the lower track 20 of the door frame 16 as shown in FIGS. 1 and 2. In particular, as shown in FIG. 2, the lower support plate 64 when disposed in the lower track 20 is substantially hidden from view. A support block 66 is connected to the lower support plate 64 by mechanical fasteners 68 such as screws. Preferably, thumb screws can be used to obviate the need for tools to attach the support block 66 to the lower support plate 64. A threaded stud 70 or bolt extends from the support block 66 to be received in the lower end 60 of the support column 54. A hex nut 72 is disposed for threaded engagement along the stud 70. The hex nut 72 is adjusted along the stud 70 to regulate the amount of threaded portion of the stud 70 that is to be inserted into the lower end 60 of the support column 54 before the lower end 60 abuts against the hex nut 72. With this arrangement, the length of the support column 54 can be selectively adjusted to and maintained at a desired length to be securely braced along the door jamb 22 between the upper and lower tracks 18,20. A sleeve 80 is internally sized and shaped for sliding movement along the support column 54 to abut the support block 66. The sleeve 80 conceals the threaded stud 70 and the hex nut 72 so that the support column 54 has a streamlined, uniform appearance as shown in FIG.1. An upper end 74 of the support column 54 is provided with an upper support plate 76 or shoe which is connected to the support column 54 with mechanical fasteners 78. 
     The upper end 74 of the support column 54 is provided with a plurality of apertures 82 to receive a motor housing 84. The motor housing 84 includes an upper end 86, a lower end 88 and at least one side wall 90 provided with apertures 92 through which mechanical fasteners 94 such as screws can be inserted for receipt in a corresponding one of the tapped apertures 82 at the upper end 74 of the support column 54. The upper end 86 of the motor housing 84 is provided with mounting-apertures 96a,96b between which is disposed another aperture 98, the purpose of which will be described hereinafter. 
     A drive assembly is disposed within the motor housing 84 as represented by the broken line 100 in FIG. 2. The drive assembly 100 includes a motor 102 and motor shaft 104. The motor shaft 104 extends from the motor housing 84 through the aperture 98. 
     In FIG. 3A, an alternative embodiment of the motor housing is shown at 84a. The motor housing 84a includes an upper end 86a, a lower end 88a and at least one side wall 90a facing the support column 54 and which is provided with a plurality of apertures 92a. Mechanical fasteners 94a such as screws are inserted through the apertures 82 at the upper end 74 of the support column 54 and into the apertures 92a of the motor housing 84a. The apertures 92a are arranged in two parallel rows along the sidewall 90a. By way of example, each row includes three apertures 92a but it will be understood that a different number of apertures can be employed to secure the motor housing 84a to the support column 54. By having two separate rows of apertures along the sidewall 90a of the motor housing 84a, during assembly of the actuator 10 the motor housing 84a can be secured to the support column 54 at a select position. In this manner, the motor housing 84a can be mounted to the support column 54 so that it is substantially unobtrusive when being viewed from the outside of the room. The upper end 86a of the motor housing 84a is provided with mounting apertures 120a,120b between which is disposed another aperture 98a. 
     The motor housing 84a is also adapted to house the drive assembly 100. The motor shaft 104 of the motor 102 extends from the motor housing 84 through the aperture 98. 
     The upper end 74 of the support column 54 is provided with apertures 106 to receive the upper support plate 76 and a second housing 108, which extends horizontally to be secured to the panel 28. An end 110 of the horizontal housing 108 includes apertures 114a,114b which extend through the housing 108 and are in registration with the apertures 96a,96b of the motor housing 84. Mechanical fasteners 116, such as thumb screws, join the end 110 of the horizontal housing 108 to the motor housing 84. The end 110 of the housing 108 also includes an aperture 118 which extends through the housing 108 between the aperture 114a,114b and is in registration with the aperture 98 of the motor housing 84 to receive the motor shaft 104. The opposite end 112 of the horizontal housing 108 extends to a position adjacent the sliding panel 28. The horizontal housing 108 can be flipped over so that the end 112 of the housing 108 faces the opposite direction while the apertures 114a,114b,118 are still maintained in registration with the apertures 96a,96b ,98 of the motor housing 84. 
     The arrangement of the apertures 114a,114b,118 and their extension through the end 110 of the horizontal housing 108 permits the housing 108 to be used regardless of the side of the door frame to which the actuator 10 is to be mounted. That is, by way of example and referring also to FIG. 1, if the actuator 10 is to be removed from the door jamb 22 to the opposite door jamb 24, this simply requires that the horizontal housing 108 shown in FIG. 3 be flipped-over to extend in a direction opposite to that shown, while the apertures 114a,114b,118 would still be maintained in registration with the apertures of the motor housing 84. In the example given, after the horizontal housing 108 is flipped over, the aperture 114a would be in registration with the aperture 96b, the aperture 114b would be in registration with the aperture 96a, and the aperture 118 would still be in registration with the aperture 98. 
     A similar mounting arrangement is available with use of the motor housing 84a and another embodiment 84b of the motor housing discussed hereinafter with reference to FIG. 5. 
     Referring to FIG. 4, the horizontal housing 108 is more clearly shown as are the elements to removably mount the horizontal housing 108 to the frame 34 of the sliding panel 28. A side 124 of the horizontal housing 108 faces the sliding panel 28 and is formed with a channel 126 which extends through to the interior 128 of the housing. Accordingly, the channel 126 faces the frame 34 of the sliding panel 28. A continuous flexible member such as a belt or chain 130 is disposed at the interior 128 of the horizontal housing 108 and is guided around pulleys 132,134 as shown in FIG. 2. The pulley 132, functions as a drive pulley for the chain 130. The drive pulley 132 is positioned at the aperture 118 and is in registration with the upper end 86 of the motor housing 84 for being driven by the motor shaft 104. The pulley 134 is free-spinning to function as an idler pulley. The chain 130 forms a continuous loop and moves in the direction of arrow A. 
     Referring to FIGS. 3 and 4, a bracket 136 (FIG. 3) is attached to the chain 130 and includes a flange 138 formed with an aperture 140 extending therethrough. The flange 138 extends from the channel 126 to face, but not contact, the frame 34 of the sliding panel 28. As the chain 130 moves in the direction indicated by arrow A, the bracket 136 with the flange 138 moves as well. 
     In FIG. 4, another bracket assembly 142 is shown removably mounted to the frame 34 of the sliding panel 28. The bracket assembly 142 is adapted to be disengagingly coupled with the flange 138 extending from the channel 126. The bracket assembly 142 includes a base plate 144 on one side of which is disposed an adhesive material 146 for removably mounting the base plate 144 to the frame 34 of the sliding panel 28. Mounting of the base plate 144 does not require the frame 34 of the sliding panel 28 to be tapped or breached for insertion of screws, bolts or the like. A pair of spaced, L-shaped flanges 148,150 are secured by mechanical fasteners 152 to the base plate 144. The flanges 148,150 extend from the base plate 144 to face the side 124 of the horizontal housing 108. The space between the flanges 148,150 is substantially in registration with the channel 126 thereby permitting the flange 138 extending from the channel 126 to be received in the space between the L-shaped flanges 148,150. A surface of each one of the L-shaped flanges 148,150 faces the space therebetween and is provided with a layer of cushionable material 154 to reduce vibration and noise when the flange 138 is disposed between the L-shaped flanges 148,150. Apertures 156,158 extend through a corresponding one of the L-shaped flanges 148,150 and the cushionable material 154. The apertures are in registration with each other and come into registration with the aperture 140 of the flange 138 when it is disposed in the space between the L-shaped flanges 148,150. A pin 160 having a tapered end 162 and a handle portion 164 is inserted through the apertures 156,140,158 to disengagedly couple the flange 138 between the spaced L-shaped flanges 148,150. With this arrangement, the motion of the chain 130 to which the bracket 136 is attached is transmitted to the bracket assembly 142 and hence, the panel 28 to be slidably moved along the tracks 18,20 to open and close the passageway 42. 
     The adhesive material 146 for removably mounting the base plate 144 to the frame 34 of the sliding panel 28 does not require the frame 34 to be structurally altered. The adhesive material 146 is strong enough to retain the bracket assembly 142 to the frame 34 regardless of the speed at which the panel 28 is being moved to open or close the passageway. 
     In FIG. 4A an alternative mounting assembly is shown to removably mount the horizontal housing 108 to the frame 34 of the sliding panel 28. In this embodiment, arrangement of the horizontal housing 108 with respect to the sliding panel 28 is similar to that discussed with reference to FIG. 4. A continuous flexible belt 130a is used instead of the chain 130 and is disposed at the interior 128 of the horizontal housing 108. The belt 130a is driven and guided around pulleys 132,134 as shown in FIG. 2. The belt 130a forms a continuous loop and moves in the direction of arrow A&#39;. A bracket 131 is secured to the belt 130a at the inside of the horizontal housing 108. A pair of posts 133 (only one of which is shown) extend from the bracket 131 through the channel 126 to be secured to a crossbar member 135 at the exterior of the horizontal housing 108 and facing the sliding panel 28. The crossbar 135 is disposed in parallel relationship with the channel 126. A pin or shaft member 137 extends through the crossbar 135 and is arranged perpendicular to the channel 126. A pair of rollers 139a,139b are mounted on the shaft member 137 in spaced relation at opposite sides of the crossbar 135. A U-shaped bracket 141 has side arms 143a,143b each of which is adapted to receive a corresponding end of the shaft member 137. A surface of the U-shaped bracket 141 faces the panel 28 and is provided with fastening means 145, such as that distributed by the 3M Company under the trademark DUAL LOCK. 
     The flexibility of the belt 130a provides for play and freedom of movement of the bracket 131 which forces the U-shaped bracket 141 and crossbar 135 back against the horizontal housing 108. The rollers 139a,139b are provided to contact the side 124 of the horizontal housing 108 so that the belt 130a movement will not be impeded by unwanted friction at the side 124 of the housing 108. 
     A coacting mounting assembly 147 is removably mounted to the sliding panel 28 for mating releasable engagement to the fastening means 145 of the U-shaped bracket 141. The mounting assembly 147 includes a base plate 149 along one side of which is disposed an adhesive material 151 for removably mounting the base plate 149 to the frame 34 of the sliding panel 28. A fastening means 153 is provided at the opposite side of the base plate 149 to face the fastening means 145 for releasable engagement thereto. With this arrangement, the motion of the belt 130a to which the bracket 131 is attached is transmitted to the U-shaped bracket 141 and hence to the panel 28 to be slidably moved along the tracks 18,20 to open and close the passageway 42. 
     The adhesive material 151 has properties and advantages similar to those of the adhesive 146 discussed with reference to FIG. 4. 
     FIG. 5 shows another embodiment 84b of the motor housing and support column 54a for the actuator 10 of the present invention. The motor housing 84b is fabricated for attachment to the support column 54a. The motor housing 84b includes a control panel 170 which constitutes one end portion of a cover 178 for the motor housing 84b, or can be integral therewith. The control panel 170 is joined to the cover 178 so that the control panel 170 is sloped or angled to face the user. The slanted control panel facilitates ease of operation and monitoring of the controls for the motor and circuitry discussed hereinafter. The control panel 170 can also be used with the motor housings 84,84a. An end 172 for a base 182 of the motor housing 84b opposite the control panel 170 is provided with apertures therethrough. The central aperture 174 enables the motor shaft 104 of the motor 102 to extend from the motor housing 84b into the horizontal housing 108 to drive the chain 130 or belt 130a. Apertures 176a,176b are adapted for registration with corresponding apertures 114a,114b. Apertures 180a,180b of the housing are in registration with apertures 184a,184b on the support column 54a for mounting the housing to the support column. Aperture 188 is for a power cord (not shown). 
     FIG. 6 shows the location and type of controls for the circuitry of the drive assembly. The control panel 170 includes a power switch 190 which is preferably of the toggle-type for ease of operation to turn the power ON/OFF to the actuator 10. 
     A sensitivity adjustment 192 SEN is employed to adjust the sensitivity of the circuitry to resistance that is encountered when the panel contacts an obstacle in its path along the line of travel. The sensitivity adjustment 192 includes a toggle switch 194 for light torque L and heavy torque H necessary to drive the panel 28, depending on the weight of the panel. 
     An auxiliary switch 196 AUX is provided when motion detection devices, pressure sensitive mats, voice announcements/audible alarms, etc. are used to actuate or indicate the status of the sliding panel. 
     A delay adjustment 198 DELAY is provided to close the sliding panel 28 after a select amount of time has elapsed since the panel was left open. The delay adjustment 198 is actuated by a toggle switch 200 when the switch has been moved to the ON position. When the toggle switch 200 is in the OFF position, the delay adjustment is disengaged and manual operation of the door is possible. As previously discussed, however, manual operation of the door is always available regardless of the position of the switch. 
     A speed adjustment 202 SPEED is provided which can be selected to move the sliding panel 28 at low L, medium M or high H speeds depending on how quickly the sliding panel 28 is to be moved to an open or closed position. 
     The direction switch 204 DIR is a toggle switch that is used to select the starting position of the sliding panel 28 with respect to the actuator 10. The starting position for the sliding panel 28 is that position where the panel has closed off the passageway 42. For example, when the switch is positioned to L (left), the sliding panel 28 is in the closed position at the left hand side of the door frame 16 when being viewed from the control panel 170. When the switch is shifted to R (right), the sliding panel 28 is in the closed position at the right side of the door frame 16 when being viewed from the control panel 170. The control panel 170 is provided with cut-out portions 206 for receiving mechanical fasteners (not shown) to join the control panel 170 to, for example, the motor housing 84b. 
     FIGS. 7, 8 and 9A-9H, show the steps employed and circuitry to control the automated actuator of the present invention. Circuit terminology for circuit components employed is shown in TABLE 1 and includes: 
     
                                           TABLE I                                 
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Reference          Description                                            
                            Value                                         
__________________________________________________________________________
C1, C2, C8         CAP      220 UF 16V RAD                                
C3, C4             CAP      10 UF 25V RAD                                 
C5, C14, C15, C16  CAP      .1 UF 50V RAD                                 
C6, C10, C11, C12, C13                                                    
                   CAP      4.7 UF 16V RAD                                
C7                 CAP      10 UF 25V RAD                                 
C9                 CAP      3300 UF 35V RAD                               
D1, D2, D3, D4, D5, D6, D7, D8, D9,                                       
                   DIODE    1N4005                                        
D12, D13, D14, D15, D16, D17                                              
D10                BRIDGE   2A                                            
D11                DIODE ZENER                                            
                            12V                                           
F1                 FUSE     1.5 AMP                                       
F2                 FUSE     2.5 AMP                                       
ISO1               OPT. CPL 4N25                                          
JP1, JP2, JP3      HEADER 2 2 PIN                                         
JP4                HEADER 5 5 PIN                                         
JP5                HEADER 8 8 PIN                                         
J1                 HEADER 13 × 2                                    
                            13 PIN BY 2                                   
K1, K2             RELAY DPDT                                             
                            12 V                                          
Q1, Q2, Q3, Q4, Q5, Q6, Q7, Q8, Q9,                                       
                   TRANSISTOR                                             
                            NPN                                           
Q10, Q11, Q12, Q13                                                        
R1, R7, R9, R10, R12, R13, R14,                                           
                   RESISTOR 10K                                           
R15, R16, R17, R18, R19, R20,                                             
R24, R28, R29, R30, R38, R42,                                             
R43, R44                                                                  
R2, R3, R45, R46, R47                                                     
                   RESISTOR 2.2K                                          
R4, R23, R27       RESISTOR 22K                                           
R5                 RESISTOR 220K                                          
R6                 RESISTOR 470K                                          
R8, R11            RESISTOR 1K                                            
R21, R22           RESISTOR 4.7K                                          
R25, R26, R31      RESISTOR 0 OHM                                         
R32, R33           RESISTOR 4.7                                           
R34                RESISTOR 33K                                           
R35                RESISTOR 1 OHM                                         
R36                RESISTOR 16K                                           
R37                RESISTOR 300 OHM                                       
R39, R40, R41      RESISTOR 100K                                          
U1, U2, U4         TIMER    LM555                                         
U3                 COUNTER DEC                                            
                            4017                                          
U5                 OP AMP   LM358                                         
U6                 FLIP FLOP                                              
                            4013                                          
VRI                VOLT. REG.                                             
                            12V 3A                                        
MAIN PCB           PCB                                                    
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     Referring to FIG. 7, a flow chart 208 is shown which represents the interaction among the steps taken by the control circuitry of the actuator 10 to determine movement of the sliding panel 28. Initially, the power to the actuator 10 is OFF and the sliding panel 28 to be actuated is in the closed position against the right side of the door frame 16 to close the passageway 42. However, it is not necessary for the sliding panel 28 to be in the closed or open position for the actuator 10 of the present invention to be employed. 
     The interaction among the steps illustrated in the flow chart 216 includes the following events: 
     210 turn power switch on; 
     212 reset flip-flop, decade counter and timer; 
     214 check the open flip-flop for reset; 
     216 check if the delay switch connected to the JP header is on; 
     218 check if a signal is present at auxiliary inputs connected to the JP header; 
     220 check if a signal is present with the RF receiver; 
     222 decode signal to determine whether signal indicates &#34;close&#34;, &#34;open&#34; or &#34;stop&#34;; 
     224 set flip-flop which will power relay to power the motor and clutch; 
     226 set flip-flop which will power relay to power the motor and clutch, and will power relay to reverse motor direction; 
     228 read current feedback of motor and compare feedback with sensitivity setting; 
     230 disconnect power to clutch and increase decade counter; 
     232 check the decade counter to the setting of sensitivity; 
     234 reconnect power to clutch; 
     236 start time out timer; and 
     238 wait for delay set by the delay potentiometer. 
     The timer 236 automatically shuts off after a predetermined amount of time, preferably approximately seven seconds after the timer is activated. This is to allow for the situation where the sliding panel 28 contacts an object in the passageway 42 but the panel movement will not stop because the sensitivity is set at a level so high that resistive contact with the object is not recognized to warrant stopping the panel. Therefore, after seven seconds, the timer will automatically stop the panel movement. The circuitry checks 214 the open flip-flop for reset because if the panel is open then there is a delay for the door to be closed. The circuitry is also arranged to determine if the delay DELAY switch 216 is connected. If the delay is set, the sliding panel 28 would not move during the delay time period selected. If the delay period is selected, then the flip-flop would be set to power the motor and engage the clutch which would close the panel. 
     The current feedback 228 of the motor is read and compared with the sensitivity SEN selected. If the reading is higher than the sensitivity selected, power to the clutch to engage the motor is disconnected which results in the decade DEC counter being increased by one (1). The current is repeatedly checked to determine whether the current feedback from the motor is equal to or not equal to the sensitivity SEN selected. For example, if the sliding panel encountered and contacted an object blocking the passageway, e.g. an individual passing through the passageway, and the sliding panel was moving to the closed position, a pulse would be received which would indicate that the movement of the sliding door should be halted. Immediately thereafter, the current feedback from the motor, i.e. a pulse, would be checked to determine if the pulses were indicative of the sliding panel still in contact with the object. In this instance, with the individual passing through the passageway, the current feedback compared with the sensitivity selected would indicate that the obstruction, i.e. the individual, was no longer present at which time power to the clutch would be reconnected for movement of the sliding panel to the closed position. Checking the current feedback from the motor is done in fractions of a second to reduce the amount of delay or dwell time. 
     When the person or object remains in the passageway 42 and prevents the sliding panel from moving to the closed position, the current feedback will be continuously read 232 to determine if the object is immovable and accordingly, power to the motor and clutch will be disconnected. The count therefore is equal and again the reset stage 212 is set. The circuitry also checks the reset stage to see if the flip-flop circuit has been reset and if it has not, the circuitry checks to see if a signal is present from the RF receiver 220 or from the auxiliary AUX 218. 
     When a signal is present to actuate the panel it is decoded 222 to determine whether the signal is for the door to be closed, opened or for the door movement to be stopped. For example, if the signal is a CLOSE signal, the flip-flop circuit will be set to power the relay and in turn the motor and clutch to proceed as before. If the signal is an OPEN signal, the series of steps beginning at 226 would be initiated with the flip-flop circuit being set which will power the relay for the motor and clutch and power the relay to reverse the direction of the motor so that the sliding panel will open. The stages to read and check the signal with respect to the sensitivity SEN selected would begin again as before. 
     The time-out timer 236 is started to reset the flip-flop circuits after a period of time has elapsed. For example, when the sliding panel is opened or closed, the time-out timer 236 is initiated with a seven second delay. At the end of seven seconds, if there has been no signal to activate the panel, the circuitry is automatically disconnected. In another application, if for example the sliding panel 28 weighed very little yet the sensitivity SEN setting was set for a much heavier door, and the door contacted a person, the time-out timer would disconnect the circuitry after seven seconds so that unnecessary wear on the clutch and motor would be avoided. 
     FIG. 8 is referred to in conjunction with FIGS. 9A-9H and shows a block diagram of a wiring arrangement 240 for the circuitry that enables the steps in FIG. 7 to be implemented. By way of example, the device employed to operate the actuator 10 of the present invention is an RF receiver, but it is understood that other devices can be employed, such as those discussed earlier with reference to FIG. 1. 
     In FIG. 8, the wiring arrangement 240 of the circuitry to control the actuator 10 is shown, as is the interaction among the components of the circuitry to move the sliding panel 28 between the open and closed positions at the door frame 16. The components of the circuitry 240 are labeled to correspond to the components listed in TABLE I and discussed with reference to FIG. 7. 
     FIGS. 9A-9H effect a wiring diagram 242 and the interconnection among the components of the circuitry for controlling the actuator 10 of the present invention. The components illustrated correspond to those listed in TABLE I and discussed with reference to FIG. 7. 
     In operation, the actuator 10 of the present invention is assembled from a kit and can be readily disassembled for storage and transport. 
     Referring again to FIGS. 1-3, to assemble the actuator 10 of the present invention, first determine if the sliding panel 28 to be actuated will be opened from left to right or right to left with respect to the control panel 170. Next, attach the horizontal housing 108 to the motor housing 84,84a being used by inserting the fasteners 116 through the corresponding apertures 114a,114b and 96a,96b (FIG. 3), 120a,120b (FIG. 3A) and tightening. The motor shaft 104 will be received in the aperture 118 of the horizontal housing 108. If the embodiment to be used includes the support column having a plurality of columnar sections 54a,54b, then join the sections together at the end 56 for engagement by a friction fit. Alternatively, the motor housing 84b (FIG. 5) can be permanently mounted to the support column 54. The lower support plate 64 is disposed in the lower track 20 and the upper support plate 76 is disposed in the upper track 18. The adjustment assembly 62 is manipulated so that the support column will fit snugly and securely against the door jamb 22 of the door frame 16. The actuator 10 is positioned at the door jamb 22 at the side of the door frame 16 opposite the sliding panel 28 when the panel is in the closed position. That is, as shown in FIG. 1 by way of example, the actuator 10 is positioned at the side of the door frame 16 so that the horizontal housing 108 extends to a position near the frame 34 of the sliding panel 28 that is to be moved between a close position and an open position. The sleeve 80 is then slid over the threaded portion of the stud 70 to conceal the stud and hex nut 72. The base plate 144 of the bracket assembly 142 is then secured by the adhesive material 146 to the frame 34 of the sliding panel 28 which is to be moved. The flange 138 of the bracket 136 is positioned in the space between the L-shaped flanges 148,150 so that the aperture 140 of the flange 138 is in registration with the apertures 156,158 of the L-shaped brackets 148,150. The pin 160 is inserted through the apertures 156,140,158 of the flanges 150,138,148, respectively, to disengagedly couple the chain bracket 136 to the bracket assembly 142 at the frame 34 of the sliding panel 28. 
     It is understood that the sliding panel 28 can be moved by the coacting mounting assemblies shown and discussed with reference to FIG. 4A. 
     To actuate the door, the devices discussed with reference to FIG. 1 can be used. The wireless bump switches 48 are positioned at the inside and outside of the sliding panel 28. Alternatively, the motion sensor 50 and the proximity switch 52 can be used to activate the actuator 10. The actuator is then plugged into a wall switch and the power switch 190 at the control panel 170 turned on. 
     The clutch system of the present invention provides for manual operation of the panel whenever desired. In addition, the clutch system stops the panel when the panel meets with a resistance which exceeds the sensitivity selected so that, in particular, youngsters or elderly persons in the path of a closing door are not hurt. The clutch system stops the panel immediately upon impact with the person. The sensitivity adjustment is employed to control how quickly the panel must stop when it contacts an obstacle in its path. 
     The clutch system of the present invention checks signals from the drive means for resistance. This is a more accurate way of reacting to any resistance that the sliding panel meets during its movement along the track. When the circuitry senses that the motor is working against resistance, depending upon the sensitivity selected, the sliding panel will be stopped at the resistance. The clutch is disengaged permitting manual operation to move the panel from the stopped position to a different location. 
     The circuitry is also adapted to disengage the clutch of the drive assembly when the sliding panel meets resistance. The amount of resistance is tested by the circuitry to determine if the resistance met warrants disengaging the clutch. After the resistance is no longer present, the actuator is triggered to either open or close the panel as desired which enables the sliding panel to proceed along its intended direction as shown in FIG. 7. 
     The delay switch and adjustment therefore at the control panel 170, is beneficial in those instances where the sliding panel 28 is left completely open or slightly ajar. This feature of the invention permits the user to determine the amount of time that the panel should be left open before it is to be closed. This is particularly useful in situations where, for example, many people are using the passageway 42. 
     The actuator 10 of the present invention can also be employed with a pocket door 40. Pocket doors are preferred in homes and other buildings where doorways are constructed to permit passage of wheel chairs or other large equipment and objects. When used with pocket doors, the actuator 10 of the present invention can more easily be inserted in a recessed portion 38 of the wall 14 to actuate the pocket door because the actuator does not require intricate wiring or complex assembly in order to be operational. 
     Although the embodiments have been described with reference to sliding doors, it is understood that the actuator 10 of the present invention can be employed with sliding windows and other similar panels as well. In addition, the actuator is adapted to be mounted to actuate panels for vertical movement. 
     The actuator 10 can be disassembled and stored in one or two boxes. That is, the support column 54 can be broken down to be stored with the horizontal housing 108 in one box, while the motor housing 84 and other hardware is stored in a separate box. Of course, in the embodiment where the motor housing 84b is attached to the support column 54, the support column and motor housing would be stored together. 
     It will be understood that the embodiments described herein are merely exemplary and that persons skilled in the art may make many variations and modifications without departing from the spirit and scope of the invention. All such modifications and variations are intended to be included within the scope of the invention as defined in the appended claims.