Electric rolling steel door safety stopping device

• US 5,228,492 A
• Filed: 07/08/1991
• Issued: 07/20/1993
• Est. Priority Date: 10/03/1991
• Status: Expired due to Fees

• Current Assignee: Ming-Sen Jou
• Original Assignee: Ming-Sen Jou
• Inventors: Jou, Ming-Sen
• Primary Examiner(s): Johnson, Blair M.
• Application Number:
  US07/726,770
• Time in Patent Office: 743 Days
• Field of Search: 160/1, 160/3, 160/4, 160/7, 160/8, 160/133, 160/188, 160/310, 49/26, 49/27, 49/28, 200/61.43, 200/61.62, 318/467, 318/468, 318/266, 318/282
• US Class Current: 160/188
• CPC Class Codes: E05F 15/48 by transmission of mechanical forces, e.g. rigid or movable members
• CPC Class Codes: E05Y 2900/00 Application of doors, windows, wings or fittings thereof
• CPC Class Codes: E05Y 2900/106 for garages
• CPC Class Codes: E06B 9/84 against dropping
• CPC Class Codes: E06B 9/88 for limiting unrolling

Abstract

A safety stopping device particularly adapted for use with an electric steel rolling door is disclosed which comprises a transmitter mounted on a base plate of the rolling door and a receiver mounted on and directly connected to the electric motor used for driving the rolling door. In addition, various transmit switches are mounted on the underside of the aforementioned base plate to indicate to the transmitter when an obstruction is encountered. Upon occurring an obstruction, a signal is transmitted to the receiver whereupon the flow of current to the electric motor is interrupted to cause the electric rolling steel door to automatically stop.

Claims

1. A safety stopping device for use on a rolling door including a base plate with an upper and lower surface and which is driven by current supplied to an electric motor, said safety stopping device comprising:

a switch assembly adapted to be attached to the lower surface of said base plate, said switch assembly including at least one contact switch, a trough member and a compression member, said compression member being adapted to be secured to the lower surface of said base plate, said trough member being fixedly secured to said compression member;

a transmitter adapted to be fixedly secured above the upper surface of said base plate, said transmitter being electrically connected to said at least one contact switch so as to output a control signal when the rolling door contacts an obstruction as sensed by said at least one contact switch;

receiver means adapted to interrupt the supply of current to the electric motor in response to receiving the control signal from said transmitter.

2. A safety stopping device as claimed in claim 1, wherein said transmitter outputs an electromagnetic control signal which is received by said receiver means.

3. A safety stopping device as claimed in claim 1, wherein said trough member is fixedly secured to said at least one contact switch.

4. A safety stopping device as claimed in claim 3, wherein said switch assembly includes a plurality of spaced contact switches to which said trough member is secured.

5. A safety stopping device as claimed in claim 3, wherein said trough member is formed from a plastic material.

6. A safety stopping device in combination with a rolling door including a base plate with an upper and lower surface and which is driven by current supplied to an electric motor comprising:

a switch assembly attached to the lower surface of said base plate, said switch assembly including at least one contact switch;

a transmitter fixedly secured above the upper surface of said base plate, said transmitter being electrically connected to said at least one contact switch so as to output a control signal when the rolling door contacts an obstruction as sensed by said at least one contact switch;

receiver means adapted to interrupt the supply of current to the electric motor in response to receiving the control signal from said transmitter.

7. A safety stopping device in combination with a rolling door as claimed in claim 6, wherein said transmitter outputs an electromagnetic control signal which is received by said receiver means.

8. A safety stopping device in combination with a rolling door as claimed in claim 6, wherein said switch assembly includes a trough member and a compression member, said compression member being secured to the lower surface of said base member, said trough member being fixedly secured to said compression member.

9. A safety stopping device in combination with a rolling door as claimed in claim 8, wherein said trough member is fixedly secured to said at least one contact switch.

10. A safety stopping device in combination with a rolling door as claimed in claim 9, wherein said switch assembly includes a plurality of spaced contact switches to which said trough member is secured.

11. A safety stopping device in combination with a rolling door as claimed in claim 9, wherein said trough member is formed from a plastic material.