Mechanical arm system for opening a door

• US 8,074,401 B2
• Filed: 06/28/2007
• Issued: 12/13/2011
• Est. Priority Date: 06/28/2007
• Status: Active Grant

• Current Assignee: Mitre Corporation
• Original Assignee: Mitre Corporation
• Inventors: Brown, Booker T.
• Primary Examiner(s): Mitchell, Katherine
• Assistant Examiner(s): Kelly, Catherine A
• Application Number:
  US11/770,686
• Publication Number:
  US 20090000198A1
• Time in Patent Office: 1,629 Days
• Field of Search: 493/39, 493/40, 493/41, 493/42, 493/44, 493/46
• US Class Current: 49/346
• CPC Class Codes: E05F 15/53 for swinging wings
• CPC Class Codes: E05F 15/63 operated by swinging arms
• CPC Class Codes: E05Y 2201/214 Disengaging means
• CPC Class Codes: E05Y 2201/232 by automatically acting means
• CPC Class Codes: E05Y 2201/422 for opening
• CPC Class Codes: E05Y 2201/434 Electromotors; Details thereof
• CPC Class Codes: E05Y 2800/74 Specific positions E05Y2400/35 takes precedence

Abstract

A mechanical arm system for opening a door includes an actuator assembly having an output shaft and an arm driven by the output shaft so as to move the door from a closed position toward an open position. The arm is free from contact with the door when the door moves from the open position to the closed position. The actuator assembly is mounted to a support member adjacent the door. The arm extends between the output shaft and the door. The arm may be moveable between a position in which the arm contacts the door in the open position and a retracted position in which the arm is free from contact with the door in the closed position. The arm may be moved to the retracted position before the door reaches the open position so as to abort the opening of the door.

Claims

1. A mechanical arm system in combination with a Sensitive Compartmented Information Facility (SCIF) door, the mechanical arm system for opening the SCIF door from a closed position to an open position, comprising:

an actuator assembly having an output shaft, said actuator assembly being mounted to a support member adjacent the door; and

an arm driven by the output shaft so as to selectively contact the door to move the door toward the open position, wherein the arm is moveable between a position in which the arm directly or indirectly contacts the door in the open position and a retracted position in which the arm is free from direct or indirect contact with the door in the closed position.

2. The mechanical arm system of claim 1, wherein the support member adjacent the door includes a wall above the door.

3. The mechanical arm system of claim 1, wherein the door is manually moveable between the closed and the open positions.

4. The mechanical arm system of claim 1, wherein the arm pivots in a first direction for contacting the door and a second direction for retracting from contact with the door, the arm pivoting with rotation of the output shaft.

5. The mechanical arm system of claim 4, wherein the actuator assembly includes a hydraulic rack and pinion rotary actuator having a piston that drives a rack which meshes with a pinion.

6. The mechanical arm system of claim 5, wherein the output shaft is coaxial with the pinion and rotates with rotation of the pinion.

7. The mechanical arm system of claim 5, further comprising a controller unit that activates and deactivates the hydraulic actuator and controls a rotational direction of the output shaft so as to pivot the arm in the first direction or the second direction.

8. The mechanical arm system of claim 7, further comprising a hydraulic pump for supplying fluid to the hydraulic actuator, wherein the controller unit is in electronic communication with the hydraulic pump and controls start and stop of the hydraulic pump so as activate and deactivate the hydraulic actuator, and controls the direction of fluid displacement by the pump so as to control the rotational direction of the output shaft, wherein the direction of fluid displacement by the pump causes the output shaft to pivot the arm in the second direction to the retracted position.

9. The mechanical arm system of claim 8, further comprising a relay sensor in electronic communication with the controller unit, wherein the relay sensor senses when the door has reached the open position under force of the arm, wherein when the open position has been sensed, the controller unit deactivates the hydraulic actuator, the arm remaining in contact with the door and holding the door in the open position until the arm has been moved to the retracted position.

10. The mechanical arm system of claim 9, further comprising a timer in electronic communication with the controller unit, wherein the timer determines the amount of time the door is held in the open position by the arm, wherein when a predetermined amount of time has passed, the controller unit activates the actuator and controls the rotational direction of the output shaft so as to move the arm to the retracted position.

11. The mechanical arm system of claim 8, further comprising a pressure overload sensor in electronic communication with the controller unit, wherein the pressure overload sensor senses when the hydraulic pressure of fluid supplied to the hydraulic actuator rises above a pre-set limit, wherein, when the pre-set pressure limit has been exceeded, the controller unit controls the rotational direction of the output shaft so as to so as to move the arm to the retracted position.

12. The mechanical arm system of claim 8, further comprising a stop switch manually operable by a user and in electronic communication with the controller unit, for aborting movement of the door toward the open position under force of the arm, wherein, when the stop switch has been activated, the controller unit controls the rotational direction of the output shaft so as to pivot the arm in the second direction to the retracted position, whereby the door is permitted to return to the closed position.

13. The mechanical arm system of claim 8, further comprising an open switch in electronic communication with the controller unit, for initiating movement of the door toward the open position under force of the arm, wherein, when the open switch has been activated, the controller unit controls the rotational direction of the output shaft so as to pivot the arm in the first direction, whereby the arm contacts the door and moves the door toward the open position.

14. A mechanical arm system in combination with a Sensitive Compartmented Information Facility (SCIF) door, the mechanical arm system for opening the SCIF door, comprising:

an actuator assembly having an output shaft, said actuator assembly being mounted to a support member adjacent the door; and

an arm driven by the output shaft, said arm extending between the output shaft and the door, wherein the arm moves the door from a closed position toward an open position, and wherein the arm is free from direct or indirect contact with the door when the door moves from the open position to the closed position, and wherein the arm is free from direct or indirect contact with the SCIF door in the closed position,

wherein the door is configured to swing back to the closed position under its own power.

15. The mechanical arm system of claim 14, further comprising a controller unit for controlling the actuator assembly so as to alternatively rotate the output shaft in a first direction and a second direction opposite the first direction, wherein, when the controller unit activates the actuator assembly to initiate a door opening process, the output shaft is rotated in a first direction to move the arm against the door so as to force the door toward the open position.

16. The mechanical arm system in combination with a Sensitive Compartmented Information Facility (SCIF) door, the mechanical arm system for opening the SCIF door, comprising:

an actuator assembly having an output shaft, said actuator assembly being mounted to a support member adjacent the door;

an arm driven by the output shaft, said arm extending between the output shaft and the door, wherein the arm moves the door from a closed position toward an open position, and wherein the arm is free from direct or indirect contact with the door when the door moves from the open position to the closed position, and wherein the arm is free from direct or indirect contact with the SCIF door in the closed position;

a controller unit for controlling the actuator assembly so as to alternatively rotate the output shaft in a first direction and a second direction opposite the first direction, wherein, when the controller unit activates the actuator assembly to initiate a door opening process, the output shaft is rotated in a first direction to move the arm against the door so as to force the door toward the open position; and

a stop switch manually operable by a user and in electronic communication with the controller unit, wherein the opening process is aborted when the stop switch is activated, wherein the controller unit activates the actuator assembly so that the output shaft rotates in the second direction and moves the arm away from direct or indirect contact with the door, whereby the door is permitted to close under its own power.