Patent US3676881A successfully refreshed from Google Patents.
US3676881A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Bed locking device
Assignee: INTERROYAL CORP
•
Filing: 1970-05-19
•
Granted: 1972-07-18
•
Expires: 1990-05-19
Abstract
Abstract An improved adjustable hospital bed providing Trendelenburg or Fowler selection includes a bed stabilizing device for roller or caster equipped beds having extensible telescoping leg members which may be extended sufficiently to raise the usual casters from the floor resulting in a solid four-point contact instead of the usual caster-roller contact. The extension is provided by the same means used for raising or lowering the bed.
Inventors
- 👤 Richard H Duprey
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 21:50
CPC Classifications
A; A61; A61G; A61G7/00; A61G7/002; A61G7/005
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
228 words
A support structure for a member such as a mattress comprising a top cross shaft, a top post connected to each end of said cross shaft and providing a rotatable support for said cross shaft and extending downwardly therefrom, said top post having a bottom end which is adapted to rest on the ground in one support position, a hollow tubular bottom post telescopically engaged over each of said top posts and being movable upwardly and downwardly therealong, a cross bar rigidly connected between said bottom posts at each end, a knee action linkage comprising first and second links pivotally connected together, one of said links being affixed at its outer end to said cross shaft for rotation therewith and the other being pivotally connected to respective ones of said bottom posts, drive bar means connected to said cross shaft to rotate said cross shaft and to move said bottom hollow tubular posts upwardly and downwardly along the respective said top posts, said hollow bottom posts at each end and said cross bar forming a support structure, and roller means connected to said support structure adjacent each bottom post and depending downwardly therefrom, said support structure being movable relatively to said top post by an amount sufficient to position said roller means below the bottom end of said top post to support said structure on said roller means.
Claim 2
Dependent Claim
228 words
A support structure for a member such as a mattress comprising a top cross shaft, a top post connected to each end of said cross shaft and providing a rotatable support for said cross shaft and extending downwardly therefrom, said top post having a bottom end which is adapted to rest on the ground in one support position, a hollow tubular bottom post telescopically engaged over each of said top posts and being movable upwardly and downwardly therealong, a cross bar rigidly connected between said bottom posts at each end, a knee action linkage comprising first and second links pivotally connected together, one of said links being affixed at its outer end to said cross shaft for rotation therewith and the other being pivotally connected to respective ones of said bottom posts, drive bar means connected to said cross shaft to rotate said cross shaft and to move said bottom hollow tubular posts upwardly and downwardly along the respective said top posts, said hollow bottom posts at each end and said cross bar forming a support structure, and roller means connected to said support structure adjacent each bottom post and depending downwardly therefrom, said support structure being movable relatively to said top post by an amount sufficient to position said roller means below the bottom end of said top post to support said structure on said roller means.
Claim 3
Dependent Claim
143 words
A support structure according to claim 1, including a mattress support member connected to the upper end of each of said top posts, each of said top posts, said bottom hollow tubular posts, said cross bar and said roller support means comprising a first end support for said mattress support member, and including a second end support including a second top post connected to each side of said mattress support member adjacent the opposite end thereof, a second bottom hollow tubular post telescopically engaged over each of said second top posts, a second cross bar connected between said second bottom tubular posts and second roller means carried on said cross bar and depending downwardly therefrom and being engageable with the ground for supporting the second end of said support structure when said second bottom tubular posts are moved to a predetermined position downwardly.
Claim 4
Dependent Claim
96 words
A support structure according to claim 2, wherein said drive bar means includes a longitudinal drive bar extending between said first end support and said second end support, a lift arm connected adjacent each end of said drive bar member and having an opposite end connected to the respective top cross shaft and said second top cross shaft, means connected to said drive bar to shift drive bar to cause rotation of said top cross shaft and said second top cross shaft for changing the elevation of said bottom tubular posts relative to said top posts.
References Cited (Backward Citations)
US2841410A
Cited
US3478372A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-07-18 | 1976-01-17 | 1976-07-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-07-18 | 1980-01-17 | 1980-07-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-07-18 | 1984-01-17 | 1984-07-18 | $7700.00 | Window Closed / Lapsed |