US3633225A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Double insulated electric hospital bed
Assignee: Hill Rom Co Inc
•
Filing: 1970-02-19
•
Granted: 1972-01-11
•
Expires: 1990-02-19
Abstract
Abstract This application discloses an electric hospital bed in which the motor and electric switches are insulated from the casing of the motor in the usual manner and in which the motor casing and electrical connections thereto are insulated from the frame of the bed to prevent damaging electric shocks from the motor thereof reaching a patient in the bed, even though an improperly grounded commercial electric circuit is encountered.
Inventors
- 👤 Francis J Burst
- 👤 James S Adams
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 02:04
CPC Classifications
A; A61; A61G; A61G7/00; A61G7/002; A61G7/018; Y; Y10; Y10T; Y10T137/00; Y10T137/2713; Y10T137/2774; Y10T137/2802; Y10T137/2815
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
202 words
An electrically operable hospital bed comprising a lower frame for supporting said bed; a mattress-supporting frame supported by said lower frame and moveable between a plurality of body-supporting positions; at least one drivescrew supported by said lower frame and connected to said mattress-supporting frame to effect movement thereof; at least one patient control rod supported by said lower frame and moveable to effect selection of said plurality of body-supporting positions; a unitary power drive and control means connected to and supported by said lower frame including an electric motor, a gearbox secured to said electric motor having at least one output shaft drivingly connected to said drivescrew, said gearbox providing selective driving engagement between said motor and drivescrew, and a control unit operable to control operation of said gearbox; and means completely electrically isolating said unitary power drive and control means from said bed-comprising mounting means formed of high dielectric strength material interposed between said unitary power drive and control means and said lower frame, coupling means formed of high dielectric strength material connecting said output shaft of said gearbox and said drivescrew, and connecting means formed of high dielectric strength material connected between said patient control rod and said control unit.
Claim 2
Dependent Claim
202 words
An electrically operable hospital bed comprising a lower frame for supporting said bed; a mattress-supporting frame supported by said lower frame and moveable between a plurality of body-supporting positions; at least one drivescrew supported by said lower frame and connected to said mattress-supporting frame to effect movement thereof; at least one patient control rod supported by said lower frame and moveable to effect selection of said plurality of body-supporting positions; a unitary power drive and control means connected to and supported by said lower frame including an electric motor, a gearbox secured to said electric motor having at least one output shaft drivingly connected to said drivescrew, said gearbox providing selective driving engagement between said motor and drivescrew, and a control unit operable to control operation of said gearbox; and means completely electrically isolating said unitary power drive and control means from said bed-comprising mounting means formed of high dielectric strength material interposed between said unitary power drive and control means and said lower frame, coupling means formed of high dielectric strength material connecting said output shaft of said gearbox and said drivescrew, and connecting means formed of high dielectric strength material connected between said patient control rod and said control unit.
Claim 3
Dependent Claim
130 words
An electrically operable hospital bed as claimed in claim 12 wherein said mounting means formed of high dielectric strength material interposed between said unitary power drive and control means and said lower frame includes a block of high dielectric strength material supported by said lower frame and having slot formed therein receiving a motor-mounting bracket connected to said motor, and a cap plate formed of high dielectric strength material secured to said block and overlying said portion of said bracket within said slot, and wherein said mounting means further includes a pair of stud screws fixed to said gearbox each supporting a cylinder formed of high dielectric strength material, a pair of brackets secured to said lower frame each supporting an elastomeric dielectric bushing, said bushing supportingly engaging said cylinders.
Claim 4
Dependent Claim
49 words
An electrically operable hospital bed as claimed in claim 1 wherein said means completely electrically isolating said unitary power drive and control means includes a cover member formed of high dielectric strength material overlying said unitary power drive and control meaNs intermediate said means and said mattress supporting frame.
Claim 5
Dependent Claim
65 words
An electrically operable hospital bed as claimed in claim 1 wherein said motor includes a power cord for connection to a source of electrical power and said means completely electrically isolating said unitary power drive and control means includes supporting means supporting the power cord of said motor upon said lower frame of said bed, said supporting means being formed of high dielectric strength material.
References Cited (Backward Citations)
US2911246A
Cited
US2988758A
Cited
US3054643A
Cited
US3034830A
Cited
US3242998A
Cited
US3198891A
Cited
US3487134A
Cited
US3237212A
Cited
US3344291A
Cited
US3414913A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-01-10 | 1975-07-12 | 1976-01-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-01-10 | 1979-07-12 | 1980-01-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-01-10 | 1983-07-12 | 1984-01-11 | $7700.00 | Window Closed / Lapsed |