DEVICE FOR PREVENTING DOOR SLAMMING

Abstract

A device for preventing door slamming including a housing that has a bore formed therein, a control element that slides in the bore, the control element having a bore formed therein, a plunger that slides in and out of the bore of the control element, the plunger being biased against a distal end of the bore of the control element by a biasing device, and a stopper element received in the plunger and extending into the control element, wherein a slamming force applied on the plunger dislodges the stopper element from the plunger so that the stopper element becomes lodged in the control element and the housing, thereby preventing the control element from sliding in the bore of the housing.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

The present invention will be understood and appreciated more fully from the following detailed description taken in conjunction with the drawings in which:

FIG. 1 is a simplified pictorial illustration of a device for preventing door slamming, constructed and operative in accordance with an embodiment of the present invention, installed in a door;

FIG. 2 is a simplified sectional illustration of the device of FIG. 1, before impact of a door thereagainst;

FIG. 3 is a simplified sectional illustration of the device of FIG. 1, upon impact of a slamming door thereagainst; and

FIG. 4 is a simplified sectional illustration of the device of FIG. 1, upon impact of a normally closing door thereagainst.

Claims

1. A device for preventing door slamming comprising: a housing that has a bore formed therein;a control element that slides in said bore, said control element having a bore formed therein;a plunger that slides in and out of said bore of said control element, said plunger being biased against a distal end of said bore of said control element by a biasing device; anda stopper element received in said plunger and extending into said control element, wherein a slamming force applied on said plunger dislodges said stopper element from said plunger so that said stopper element becomes lodged in said control element and said housing, thereby preventing said control element from sliding in said bore of said housing.

2. The device according to claim 1, wherein a distal portion of said control element is arranged for sliding in said bore of said housing against a biasing device.

3. The device according to claim 1, wherein said plunger has a distal shaft portion that extends into and slides in and out of said bore of said control element, said distal shaft portion being biased against the distal end of said bore of said control element by said biasing device.

4. The device according to claim 3, wherein said control element has a transverse bore formed therein, generally perpendicular to said bore of said control element, wherein said distal shaft portion is formed with an annular groove and said stopper element is received in said annular groove of said distal shaft portion and extends into said transverse bore of said control element.

5. The device according to claim 4, wherein said housing comprises an end cap with a transverse annular groove formed therein corresponding to the transverse bore of said control element, wherein a slamming force applied on said plunger causes compression of said biasing device and dislodges said stopper element from said annular groove so that said stopper element becomes lodged in said transverse bore of said control element and said transverse annular groove of said end cap, thereby preventing said control element from sliding in said bore of said housing.

6. The device according to claim 2, wherein a spring force of said biasing device of said control element is greater than that of said biasing device of said housing.

7. The device according to claim 5, wherein if a non-slamming force is applied against said plunger, said stopper element remains in said annular groove of said distal shaft portion and locks said distal shaft portion with said control element, so as to cause said control element to slide in said bore.