Apparatus for the damping of impacts, preferably the impacts of furniture doors or drawers

• US 20020010977A1
• Filed: 06/07/2001
• Published: 01/31/2002
• Est. Priority Date: 06/08/2000
• Status: Active Grant

• Current Assignee: Arturo Salice SPA
• Original Assignee: Arturo Salice SPA
• Inventors: Salice, Luciano
• Granted Patent: US 6,615,450 B2
• Time in Patent Office: Days
• US Class Current: 16/49
• CPC Class Codes: E05F 5/02 specially for preventing the slamming of swinging wings during final closing movement, e.g. jamb stops
• CPC Class Codes: E05F 5/08 with springs
• CPC Class Codes: E05F 5/10 with piston brakes
• CPC Class Codes: E05Y 2201/212 Buffers
• CPC Class Codes: E05Y 2201/256 with pistons or vanes
• CPC Class Codes: E05Y 2201/264 linear
• CPC Class Codes: E05Y 2900/20 for furniture, e.g. cabinets
• CPC Class Codes: F16F 9/3242 of cylinder ends, e.g. caps
• CPC Class Codes: F16F 9/36 Special sealings, including sealings or guides for piston-rods F16F9/325, F16F9/3485 take precedence; arrangements for filling via piston rod sealing or guiding means F16F9/432 ; sealing of moving parts in general F16J15/16 - F16J15/56

Abstract

An apparatus for the damping of impacts, preferably the impacts of furniture doors or drawers, consists of a cylinder with a piston whose piston rod sealingly guided out of a cylinder side forms a ram absorbing the impacts which divides the cylinder space filled with a liquid into two chambers and has perforations and/or, together with the cylinder wall, bounds a passage gap. A guide bushing guiding the piston rod is arranged in the region of the discharge end of the cylinder. A compression spring is clamped between the piston and the cylinder bottom. To ensure a smooth and quiet running with a compact construction, the guide bushing has a central shaft part of reduced diameter. A widened end part of the guide bushing is supported on a step or annular flange constricting the inner diameter of the cylinder and the guide bushing is supported at the other end on a cover closing the cylinder. The shaft part of the guide bushing is encompassed by a tube-section-like part made of elastic material.

Claims

1. An apparatus for the damping of impacts, preferably the impacts of furniture doors or drawers, consisting

of a cylinder (1) with a piston (7, 40) whose piston rod (9) sealingly guided out of a cylinder side forms a ram absorbing the impacts which divides the cylinder space filled with a liquid into two chambers and has perforations and/or, together with the cylinder wall, bounds a passage gap;

of a guide bushing (10) arranged in the region of the outlet end of the cylinder (1) and guiding the piston rod (9); and

of a compression spring (6) clamped between the piston (7, 40) and the cylinder bottom,

characterized in that the guide bushing (10) has a central shaft part (23) of reduced diameter and a widened end part (24) thereof is supported on a step or an annular flange (3) constricting the inner diameter of the cylinder (1) and the other end is supported on a cover (11) closing the cylinder (1);

and in that the shaft part (23) of the guide bushing (10) is enclosed by a tube-section-like part (35) made of an elastic material.

2. An apparatus in accordance with claim 1, wherein the tube-section-like-part (35) consists of cellular rubber or foam rubber or foamed elastomer plastic.

3. An apparatus in accordance with either of claims 1 or 2, wherein the cover (11) consists of a bush-shaped part with a borehole (12) in its bottom for the passage of the piston rod (9) and with a flange-shaped edge with which the cover (11) is supported on the annular end face of the cylinder (1).

4. An apparatus in accordance with any of claims 1 to 3, wherein a part (25) widening the shaft part (23) of the guide bushing (10) is supported on the cover.

5. An apparatus in accordance with claim 4, wherein a frusto-conically widening part (25) of the guide bushing (10) engages into a complementary borehole (30) of the cover (11).

6. An apparatus in accordance with any of claims 1 to 5, wherein the widened part of the guide bushing is supported on an annular step (31) of the inner space of the cover (11).

7. An apparatus in accordance with any of claims 1 to 6, wherein an annular lip seal (28) is held between the bottom of the cover (11) and the annular end face of the guide bushing (10).

8. An apparatus in accordance with any of claims 1 to 7, wherein the guide bushing (10) is provided at its end region at the cover side with axial ribs (26) which are encompassed by the jacket of the cover.

9. An apparatus in accordance with any of claims 1 to 8, wherein the lower widened part of the guide bushing (10) is provided with perforations or sections which bound passage gaps together with the inner cylinder wall.

10. An apparatus in accordance with any of claims 1 to 9, wherein the piston rod (9) in the cylinder is provided with a flat head (8), with which it is supported on the piston (7, 40).

11. An apparatus in accordance with any of claims 1 to 10, wherein the piston (7) is provided with perforations and/or bounds an annular gap with the cylinder wall.

12. An apparatus in accordance with any of claims 1 to 11, wherein the piston (7) has a transversely extending groove (18) with an axial borehole (19) in its end face facing the piston rod (9), which opens into a widened axial borehole (20) of the piston (7).

13. An apparatus in accordance with any of claims 1 to 12, wherein the piston (7) is provided with at least one radial borehole (21) which connects the axial borehole (20) to a widened piston section (15).

14. An apparatus in accordance with any of claims 1 to 13, wherein the piston is reduced in its diameter on its side facing the cylinder bottom and forms a seating for the compression spring (6).

15. An apparatus in accordance with any of claims 1 to 14, wherein the piston (40) has an annular groove (41), into which a preferably obliquely slit ring (44) is inserted, between its end face and its widened part.