US3733623A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hospital beds
Assignee: NESTBIT EVANS AND COMP Ltd
•
Filing: 1971-11-17
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Granted: 1973-05-22
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Expires: 1991-11-17
Abstract
Abstract A hospital bed having a mattress supporting element which can be elevated or lowered relative to the bed chassis through the agency of a mechanical jack is additionally provided with a hydraulic damper for controlling descent of the supporting element.
Inventors
- 👤 J Croxton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 09:56
CPC Classifications
A; A61; A61G; A61G7/00; A61G7/002; A61G7/012
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
83 words
A hospital bed of the kind referred to, provided with a canting plate mechanical jack for raising the top and for permitting descent, including a pair of canting plates which respectively act on a ram of the jack to lift the ram in one direction and brake the ram against descent in the opposite direction, the lifting plate being operable in response to pivoting of a lever in a first sense, wherein the improvement comprises a hydraulic damper strut located to control descent.
Claim 2
Dependent Claim
83 words
A hospital bed of the kind referred to, provided with a canting plate mechanical jack for raising the top and for permitting descent, including a pair of canting plates which respectively act on a ram of the jack to lift the ram in one direction and brake the ram against descent in the opposite direction, the lifting plate being operable in response to pivoting of a lever in a first sense, wherein the improvement comprises a hydraulic damper strut located to control descent.
Claim 3
Dependent Claim
56 words
A hospital bed as claimed in claim 1 in which means are provided for disengaging the braking plate to permit lowering of the top under control of the damper strut, said means being operatively connectible with said lever so as to disengage the braking plate in response to pivoting of the lever in said first sense.
Claim 4
Dependent Claim
25 words
A hospital bed as claimed in claim 1 which includes means for holding the braking plate in a disengaged condition during pivoting of said lever.
Claim 5
Dependent Claim
28 words
A hospital bed as claimed in claim 1 which includes means for rendering the lever operable to simultaneously disengage the braking plate and operate the ram lifting plate.
Claim 6
Dependent Claim
134 words
A hospital bed of the kind referred to, provided with a canting plate mechanical jack for raising the top and for permitting descent, including a pair of canting plates which respectively act on a ram of the jack to lift the ram in one direction and brake the ram against descent in the opposite direction, the lifting plate being operable in response to pivoting of a lever in a first sense, wherein the improvement comprises a hydraulic damper strut located to control descent, and means for rendering the lever operable to simultaneously disengage the braking plate and operate the ram lifting plate, including a sleeve slidable on the lever and movable to a position in which a cam carried thereby cams with a cam follower associated with the braking plate to disable the latter.
Claim 7
Dependent Claim
134 words
A hospital bed of the kind referred to, provided with a canting plate mechanical jack for raising the top and for permitting descent, including a pair of canting plates which respectively act on a ram of the jack to lift the ram in one direction and brake the ram against descent in the opposite direction, the lifting plate being operable in response to pivoting of a lever in a first sense, wherein the improvement comprises a hydraulic damper strut located to control descent, and means for rendering the lever operable to simultaneously disengage the braking plate and operate the ram lifting plate, including a sleeve slidable on the lever and movable to a position in which a cam carried thereby cams with a cam follower associated with the braking plate to disable the latter.
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) | 1976-05-21 | 1976-11-20 | 1977-05-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-05-21 | 1980-11-20 | 1981-05-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-05-21 | 1984-11-20 | 1985-05-22 | $7700.00 | Window Closed / Lapsed |