US 6,474,246 B2 · Table with extendable legs

Abstract

A table with extendable legs includes at least one base and extendable leg having one end secured in the base so the leg can stand upright. A tabletop is mounted horizontally on the other end of the leg. The leg includes an external rod and a sleeve centrally inserted into and secured in the hollow external rod. The sleeve includes an inner thread formed in a free end of the sleeve. A hollow internal rod is movably received in the hollow external rod. A threaded spindle is screwed into inner thread and a first gear is securely attached to the free end of the threaded spindle. A Z-shaped handle includes one end having a second gear securely mounted to engage to the first gear to drive the threaded spindle to control the length of the extendable leg to control the height of the table.

Drawings

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Drawings

Claims18

Dependent claims

A table with extendable legs comprising:

at least one base;
at least one leg including a first end mounted in a corresponding one of the at least one base to stand upright and a second end, the leg comprising:
a hollow external rod having a closed end mounted in the base and an open end opposite to the base;
a sleeve centrally inserted into and secured in the hollow external rod, the sleeve including an internal thread formed in a free end of the sleeve, the internal thread having a diameter smaller than the internal diameter of the sleeve;
a hollow internal rod movably received in the hollow external rod;
a connector attached to one end of the hollow internal rod opposite to the base;
a threaded spindle having a first end screwed into the sleeve via the internal thread in the sleeve and a second end rotatably mounted in the connector and extending through the connector;
and
a first gear securely attached to the second end of the threaded spindle;
a frame including at least one rod mounted on a corresponding one of the connectors;
a handle including one and extending into one of the at least one rod and having a second gear securely mounted on an extension formed on the handle to engage with the first gear to drive the threaded spindle;
and
a tabletop mounted on the frame.

10 more elements

A table with extendable legs comprising:

two bases;
a horizontal stabilizer having two opposite ends respectively secured in a corresponding one of the two bases;
two legs each including a first end mounted in a corresponding one of the base to stand upright, each of the legs comprising:
a hollow external rod having a closed end mounted in the base and an open end opposite to the base;
a sleeve centrally inserted into and secured in the hollow external rod, the sleeve including an internal thread formed in a free end of the sleeve, the internal thread having a diameter smaller than the internal diameter of the sleeve;
a hollow internal rod movably received in the hollow external rod;
a connector attached to one end of the hollow internal rod opposite to the base;
a threaded spindle having a first end screwed into the sleeve via the internal thread in the sleeve and a second end rotatably mounted in the connector and extending through the connector;
and
a first gear securely attached to the second end of the threaded spindle;
two rods each having an invaded U-shaped cross section respectively mounted on a corresponding one of the connectors;
a tube axially aligned with the first gears and mounted between the two rods with inverted U-shaped cross section, the tube connecting the internal surfaces of the two rods with inverted U-shaped cross section;
and
a shaft ratably received in the tube, the shaft including two ends each having a second gear engaged to and driving the first gears of the legs;
and
a Z-shaped handle having one end extending into one of the rods with inverted U-shaped cross section and secured on and driving a corresponding one of the second gears.

13 more elements

Dependencies are inferred from the claim text.

Description1,752 words

Summary463 words

#1. Field of the Invention

#The present invention relates to a table, and more particularly to a table with legs that can extend-to a suitable length to accommodate a specific user's stature.

#2. Description of Related Art

Brief description of the drawings6 figures

#FIG. 1 is an exploded perspective view of a table with extendable legs in accordance with the present invention;

#FIG. 2 is a partial exploded perspective view of the table with extendable legs in FIG. 1;

#FIG. 3 is a cross sectional side plan view of a leg of the table with extendable legs in FIG. 1;

Detailed description1,168 words

#With reference-to the drawings and initially to FIG. 1, a table with extendable legs in accordance with the present invention comprises at least one leg (10), a base (20), a frame (40) and a tabletop (30). The leg (10) with-one end mounted in a base (20) stands up right. The frame (40) is mounted on the other end of the leg (10) to support the tabletop (30). The leg (10), base (20), frame (40) and tabletop (30) can be detached from one another to save space during transportation or storage.

#With reference to FIGS. 1-4, the preferred embodiment of the table with extendable legs in accordance with the present invention comprises two legs (10) with a base (20) corresponding to each leg (10) and a horizontal stabilizer (22) connected between the two bases (20) to promote the rigidity and stability of the table. The leg (10) includes a hollow external rod (11) having a closed end secured in the base (20) and an open-end opposite to the closed end. A sleeve (13) is centrally secured in the external rod (11) and has an internal thread (131) formed in the free end of the sleeve (13). The internal thread (13l) has a diameter smaller than the internal diameter of the sleeve (13).

#A hollow internal rod (12) is movably received in the external rod (11) and has one end extending out from the external rod (11). A connector (121) is mounted in the end of the internal rod (12) extending out from the external rod (11), and a first gear (15) is rotatably mounted in the connector (121). The first gear (15) may be a bevel gear. A first end of a threaded spindle (151) is centrally rotatably mounted in the connector (121), and a second end extends into the internal rod (12). The threaded spindle (151) is screwed into the inner thread (131) in the sleeve (13) to hold the internal rod (12) in place. A collar (16) is attached to the free end of the external rod (11) and abuts the external periphery of the internal rod (12). An annular bushing (17) is attached to the outside of the end of the internal rod (12) opposite to the connector (121) and slides on the internal surface of the external rod (11). The collar (16) and the annular bushing (17) can prevent the internal surface of the external rod (11) from being damaged by the internal rod (12) and promotes the stability between the external rod (11) and the internal rod (12).

Facts

Application

09/781,669Filed 12 Feb 2001

Published

US 2002/0108544 A115 Aug 2002

Granted

5 Nov 2002

Term ended

12 Feb 2021

Estimated · how

20 years from earliest known nonprovisional domestic filing plus recorded patent term adjustment. Maintenance-fee lapses, terminal disclaimers and statutory extensions have not been checked. The continuity chain may be incomplete; this is not an enforceability determination.

Classification2 codes

A47B 9/04
Tables with tops of variable height: with vertical spindle
A47B
Tables

Table with extendable legs

Life of this patent

Table with extendable legs

Life of this patent

Life of this patent

Abstract

Drawings

Drawings

Claims18

Description1,752 words

Drawings

Classification2 codes

Life of this patent

Description1,752 words