US 4,631,763 A · Retractable bed with a pivoted screw drive

Abstract

A retractable bed includes a self-standing enclosure frame having tracks with curved segments at opposite ends of the enclosure. A mattress support frame formed of interconnected hinged sections has rollers which engage the tracks such that the mattress frame slides between a retracted position within the enclosure and a sleeping position extending from the enclosure. The mattress frame is oriented to move sideways into and out of the enclosure. A motor bracket is pivotally connected to the enclosure frame, has a motor mounted thereon, and has an elongated threaded shaft engaged with the motor. A nut arm is pivotally connected to the mattress frame, and a nut on a free end of the arm is threaded onto the shaft. Rotation of the shaft moves the mattress frame along the tracks for extension and retraction. Pivoting of the drive assembly accommodates movement of the mattress frame around the curved segments of the tracks.

Claims15

Dependent claims

A retractable bed apparatus comprising:

(a) enclosure frame means;
(b) mattress frame guide means positioned within said enclosure frame means;
(c) a flexible mattress frame engaged with said guide means, having a retracted position wherein said mattress frame is received completely within said enclosure frame means, and having a sleeping position wherein said mattress frame is extended from said enclosure frame means;
(d) a mattress affixed to said mattress frame;
(e) a motor bracket pivotally connected to said enclosure frame means;
(f) a rotary motor mounted on said bracket;
(g) an elongated threaded shaft extending from said bracket and drivingly engaged with said motor;
(h) nut means pivotally connected to said mattress frame and in threaded engagement with said shaft;
and
(i) motor control means connecting said motor to a source of power to selectively rotate said shaft to displace said mattress frame to thereby effect the substantially complete extension of said mattress frame from said enclosure frame means and the retraction of said mattress frame into said enclosure frame means.

7 more elements

A retractable bed apparatus comprising:

(a) enclosure frame means;
(b) left and right guide tracks;
each track including a short horizontal segment connected to an elongated vertical segment by an arcuate segment;
(c) a flexible mattress frame engaged with said tracks, said mattress frame having a retracted position wherein said mattress frame is received completely within said enclosure frame means and a sleeping position wherein said mattress frame is extended from said enclosure frame means;
(d) a mattress affixed to said mattress frame;
(e) a motor bracket pivotally connected to said enclosure frame means;
(f) a rotary motor mounted on said bracket;
(g) an elongated threaded shaft extending from said bracket and drivingly engaged with said motor;
(h) a nut arm having a first end and an opposite second end;
said first end being pivotally connected to said mattress frame and said second end having a threaded nut member formed thereon to receive said shaft in threaded engagement therein;
(i) motor control means connecting said motor to a source of power to selectively rotate said shaft to displace said mattress frame along said tracks to thereby effect the substantially complete extension of said mattress frame from said enclosure frame means and the retraction of said mattress frame into said enclosure frame means;
(j) said mattress frame having opposite head and foot ends and opposite lateral sides;
and
(k) said mattress frame being oriented to be displaced in a direction perpendicular to said sides upon extension and retraction.

11 more elements

Dependencies are inferred from the claim text.

Retractable bed with a pivoted screw drive

Life of this patent

Retractable bed with a pivoted screw drive

Life of this patent

Abstract

Claims15