US3644945A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Adjustable hospital beds
Assignee: Goodman Brothers Manufacturing Co
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Filing: 1969-12-31
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Granted: 1972-02-29
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Expires: 1989-12-31
Abstract
Abstract An adjustable bed of the so-called ''''hospital type'''' which may optionally be vertically or angularly adjusted as a unit and which is provided with a bedspring having articulated sections which are relatively angularly adjustable. The bed is provided with electrical control means for all the adjustments which may selectively be operated either by the nurse or other attendant or by the patient occupying the bed. This control means is provided with an electrical network, which is so constructed that it eliminates any possibility of electrical discharge which may cause a shock to the operator or which may cause a flammable spark.
Inventors
- 👤 Robert Goodman
- 👤 David G Kilpatrick
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 18:33
CPC Classifications
F; F16; F16D; F16D11/00; F16D11/08; F16D11/10; A; A61; A61G; A61G7/00; A61G7/002; A61G7/018
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
202 words
An adjustable bed comprising a base and an upper frame vertically movable relative to said base, first linkage operatively connecting one portion of said base to the corresponding portion of said upper frame and second linkage operatively connecting the opposite portion of said base to the corresponding portion of said upper frame, said first and second linkage being individually operative to move the corresponding portions of said upper frame relative to said base, said first linkage being connected to a first threaded sleeve and said second linkage being connected to a second threaded sleeve, said first sleeve being threadedly engaged with a first threaded shaft and said second sleeve being threadedly engaged with a second threaded shaft, said shafts being in longitudinal alignment with each other, coupling means connected to said first shaft and releasably connectable to said second shaft, engagement means for engaging said coupling means with said second shaft, and disengagement means for disengaging said coupling means from said second shaft, a reversible electric motor operatively connected to said first shaft, and a control means operatively connected to said motor and constructed and arranged to selectively actuate said motor to rotate said first shaft in either of two opposite directions.
Claim 2
Dependent Claim
202 words
An adjustable bed comprising a base and an upper frame vertically movable relative to said base, first linkage operatively connecting one portion of said base to the corresponding portion of said upper frame and second linkage operatively connecting the opposite portion of said base to the corresponding portion of said upper frame, said first and second linkage being individually operative to move the corresponding portions of said upper frame relative to said base, said first linkage being connected to a first threaded sleeve and said second linkage being connected to a second threaded sleeve, said first sleeve being threadedly engaged with a first threaded shaft and said second sleeve being threadedly engaged with a second threaded shaft, said shafts being in longitudinal alignment with each other, coupling means connected to said first shaft and releasably connectable to said second shaft, engagement means for engaging said coupling means with said second shaft, and disengagement means for disengaging said coupling means from said second shaft, a reversible electric motor operatively connected to said first shaft, and a control means operatively connected to said motor and constructed and arranged to selectively actuate said motor to rotate said first shaft in either of two opposite directions.
Claim 3
Dependent Claim
106 words
The bed in claim 1 wherein said coupling means is a sleeve having a closed slot and an open-ended notch spaced longitudinally from said slot, a transverse pin on said first shaft engaged in said slot and a transverse pin on said second shaft releasably engaged in said notch, biasing means urging said sleeve into a position wherein the pin on said second shaft is engaged in said notch, and cam means operatively engageable with said sleeve to move said sleeve in a direction to overcome the force of said biasing means and move said notch out of engagement with the pin on said second shaft.
Claim 4
Dependent Claim
35 words
The bed of claim 2 wherein said cam means comprises a plate in abutment with a peripheral flange on said sleeve, and a rotatable cam movable into and out of pressure engagement with said plate.
Claim 5
Dependent Claim
70 words
The bed of claim 1 wherein said upper frame supports a bedspring, said bedspring having a head section, a seat section, a knee section and a foot section, said head and knee sections being pivotally connected to the seat section, and the foot section being pivotally connected to the knee section and movable therewith, the entire bedspring being vertically and angularly movable as a unit together with said upper frame.
Claim 6
Dependent Claim
88 words
The bed of claim 4 wherein each of the head section and the foot section is operatively connected to a corresponding operating means, each operating means comprising an internally threaded tube into which threadedly extends a threaded rod, each of said rods being operatively connected to a reversible electric motor for rotating the rod in opposite directions, and control means operatively connected to each electric motor, said control means being constructed and arranged to selectively actuate said motors to rotate said rods in either of two opposite directions.
Claim 7
Dependent Claim
101 words
The bed of claim 1 wherein said control means is an electrical network comprising a selector switch and a control switch in circuit with each other, said selector switch being movable to and from a position establisHing a circuit between said control switch and said reversible electric motor, said electric motor having opposed windings, each of which is connected to the secondary of a transformer, the control circuit from each winding to the transformer including a bidirectional gate, said gate being in circuit with a high-frequency generator and with at least one capacitor interposed between said gate and said control switch.
Claim 8
Dependent Claim
48 words
The bed of claim 6 wherein said transformer comprises a primary winding positioned radially outward of the secondary winding, the secondary winding being electrically connected to said bed, a grounded copper foil shield encompassing said secondary winding, and low dielectric-constant spacers between said shield and said primary winding.
Claim 9
Dependent Claim
41 words
The bed of claim 7 wherein said transformer is provided with a power cable comprising a central spacing strand surrounded by alternate conducting and spacing strands, said strands all being tangential to each other, and an insulating jacket encompassing said strands.
Claim 10
Dependent Claim
144 words
The bed of claim 5 wherein each control means is an electrical network comprising a selector switch and a control switch in circuit with each other, said selector switch being movable to and from a position establishing a circuit between said control switch and said reversible electric motor, said electric motor having opposed windings, each of which is connected to the secondary of a transformer, the control circuit from each winding to the transformer including a bidirectional gate, said gate being in circuit with a high-frequency generator and with at least one capacitor interposed between said gate and said control switch, said control switch comprising a switch assembly having a movable contact in circuit with said high frequency generator and a plurality of contacts selectively engageable by said movable contact, each of said plurality of contacts being in circuit with the respective bidirectional gate.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-02-28 | 1975-08-30 | 1976-02-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-02-28 | 1979-08-30 | 1980-02-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-02-28 | 1983-08-30 | 1984-02-29 | $7700.00 | Window Closed / Lapsed |