# US 5,706,606 A · Device for shutting a sliding door

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- Number: US 5,706,606 A
- Document ID: US5706606A
- Status: Granted
- Kind: A
- Application number: 08/652,802
- Filed: 1996-05-23
- Granted: 1998-01-13
- Earliest claimed: 1996-05-23
- Inventors: Kanial Lin
- Web page: https://patentgrep.com/patent/US5706606A

## CPC

- E05F 1/16: for sliding wings
- E05F 3/02: with pneumatic piston brakes (rotary type E05F3/14)
- F16F 1/128: {with motion-limiting means, e.g. with a full-length guide element or ball joint connections; with protective outer cover (F16F1/121 takes precedence)}
- F16F 3/04: composed only of wound springs
- E05Y 2900/132: Doors
- E05F: DEVICES FOR MOVING WINGS INTO OPEN OR CLOSED POSITION; CHECKS FOR WINGS; WING FITTINGS NOT OTHERWISE PROVIDED FOR, CONCERNED WITH THE FUNCTIONING OF THE WING
- F16F: SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- E05Y: INDEXING SCHEME ASSOCIATED WITH SUBCLASSES E05D AND E05F, RELATING TO CONSTRUCTION ELEMENTS, ELECTRIC CONTROL, POWER SUPPLY, POWER SIGNAL OR TRANSMISSION, USER INTERFACES, MOUNTING OR COUPLING, DETAILS, ACCESSORIES, AUXILIARY OPERATIONS NOT OTHERWISE PROVIDED FOR, APPLICATION THEREOF

## Abstract

A sliding door shutting device includes a barrel slidably engaged in a housing and has a plug secured on one end and slidably engaged in the housing. The plug has an annular groove defined by two side walls. A spring may bias the barrel inward of the housing. The sealing ring is engaged with one side wall for allowing air to bypass the plug when the barrel is moved outward of the housing, and the sealing ring is engaged with the other side wall so as to make an air tight seal between the plug and the housing when the barrel is moved inward of the housing.

## Claims

### Claim 1

A device for moving a sliding door laterally, said device comprising:
a housing including a first end having an air hole formed therein and including a second end having an orifice formed therein, said housing including an inner peripheral surface formed therein and including an inner diameter,
at least one barrel slidably engaged in said housing and including a first end having a plug secured thereon and slidably engaged in said housing, said barrel including a second end extended outwardly of said housing via said orifice, said plug including an annular groove formed therein so as to define a first side wall arranged closer to said first end of said housing and a second side wall arranged closer to the second end of said housing, said plug including a first end having at least one notch formed in said first side wall and communicating with said annular groove, said plug including an outer diameter slightly less than the inner diameter of said housing,
a sealing ring engaged in said annular groove, said sealing ring including an outer diameter slightly greater than the inner diameter of said housing for engaging with said inner peripheral surface of said housing, and
a spring engaged in said housing and said barrel, said spring including a first end secured to said first end of said housing and including a second end secured to said second end of said barrel for biasing said barrel inward of said housing and for allowing said barrel to be pulled outwardly of said housing for extending a length between said first end of said housing and said second end of said barrel,
said sealing ring being caused to engage with said first side wall so as to allow air to bypass said plug via said notch when said barrel is moved outwardly of said housing, and said sealing ring being caused to engage with said second side wall so as to make an air tight seal between said plug and said housing and so as to force the air to flow out of said housing via said air hole when said barrel is released and is moved inward of said housing by said spring.