US3711882A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Elevated doorway retractable ramp structure
Assignee: Individual
•
Filing: 1971-02-24
•
Granted: 1973-01-23
•
Expires: 1991-02-24
Abstract
Abstract A loading and unloading ramp structure for use in conjunction with an enclosure having one upstanding wall with an elevated entranceway formed therein and an interior floor surface having one exposed edge portion extending across the lower portion of the entranceway. The ramp structure comprises an elongated panel and the enclosure includes a horizontally elongated recess disposed beneath the floor surface thereof and having one end opening outwardly of the lower portion of the entranceway. The elongated panel or panel member is slideably endwise receivable within the recess for endwise extension and retraction relative thereto and retracting, extending and supporting tension member sections are provided and operatively supported from the enclosure structure and connected to the elongated ramp member in a manner such that the ramp structure may be extended or retracted either from within the enclosure structure or from the outside thereof and by a person either standing on his feet or seated in a wheel chair.
Inventors
- 👤 J Iller
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 13:49
CPC Classifications
B; B60; B60P; B60P1/00; B60P1/43; B60P1/431; A; A61; A61G; A61G3/00; A61G3/02; A61G3/06; A61G3/061; A61G3/067
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
185 words
In combination with an enclosure structure having one upstanding wall with an elevated entranceway formed therein and an interior floor surface having one exposed edge portion extending across the lower portion of said entranceway, an entrance ramp comprising an elongated panel member, said enclosure structure including a horizontally elongated recess disposed beneath said floor surface and having one end thereof opening outwardly of said entranceway, said recess and ramp including coacting guide means slideably endwise receiving said ramp to a position at least substantially fully disposed in said recess and guiding said ramp for endwise extension from said recess to a position with only the inner end of said ramp supported from said enclosure structure and with the outer free end of said ramp swung downwardly for support from a support surface such as the ground, the exposed edge portion of said floor surface including tension member guide means, a flexible tension member section having one end thereof anchored to the inner end of said ramp, an intermediate portion of said tension member being guidingly Engaged with said guide member for longitudinal displacement relative thereto.
Claim 2
Dependent Claim
185 words
In combination with an enclosure structure having one upstanding wall with an elevated entranceway formed therein and an interior floor surface having one exposed edge portion extending across the lower portion of said entranceway, an entrance ramp comprising an elongated panel member, said enclosure structure including a horizontally elongated recess disposed beneath said floor surface and having one end thereof opening outwardly of said entranceway, said recess and ramp including coacting guide means slideably endwise receiving said ramp to a position at least substantially fully disposed in said recess and guiding said ramp for endwise extension from said recess to a position with only the inner end of said ramp supported from said enclosure structure and with the outer free end of said ramp swung downwardly for support from a support surface such as the ground, the exposed edge portion of said floor surface including tension member guide means, a flexible tension member section having one end thereof anchored to the inner end of said ramp, an intermediate portion of said tension member being guidingly Engaged with said guide member for longitudinal displacement relative thereto.
Claim 3
Dependent Claim
53 words
The combination of claim 1 wherein the inner end of said ramp includes a depending stop flange and the outer portion of said recess includes an upwardly projecting stop flange, said ramp stop flange being engageable with the second mentioned stop flange to limit outward displacement of said ramp relative to said recess.
Claim 4
Dependent Claim
38 words
The combination of claim 2 wherein the side edges of said ramp and said recess include coacting guide means for guiding said ramp relative to said recess during extension and retraction of said ramp relative to said recess.
Claim 5
Dependent Claim
45 words
The combination of claim 1 wherein the rear end of said ramp includes dependingly supported rollers rollingly engaged with the lower extremity of said recess and the outer end of said recess includes upwardly projecting rollers rollingly engaged with the under surface of said ramp.
Claim 6
Dependent Claim
78 words
The combination of claim 1 including a second tension member section having one end thereof secured to the outer end of said ramp, an elevated support disposed in elevated position above said exposed edge portion of said floor surface, first and second guide means supported from said elevated support, the first mentioned tension member section being guidingly engaged by said first guide means and the second mentioned tension member section being guidingly engaged with said second guide means.
Claim 7
Dependent Claim
22 words
The combination of claim 5 wherein said tension member sections comprise the opposite end portions of a single elongated flexible tension member.
Claim 8
Dependent Claim
165 words
The combination of claim 1 wherein the exposed edge portion of said floor surface includes tension member guide means, a flexible tension member section having one end thereof anchored to the inner end of said ramp, an intermediate portion of said tension member being guidingly engaged with said guide member for longitudinal displacement relative thereto, including a second tension member section having one end thereof secured to the outer end of said ramp, an elevated support disposed in elevated position above said exposed edge portion of said floor surface, first and second guide means supported from said elevated support, the first mentioned tension member section being guidingly engaged by said first guide means and the second mentioned tension member section being guidingly engaged with said second guide means, means supporting said elevated support for horizontal shifting between an elevated position generally centered over the outer end of said recess and an elevated position displaced toward one side of said recess and the other end thereof.
Claim 9
Dependent Claim
75 words
The combination of claim 1 wherein said enclosure structure includes a pair of spaced side by side horizontally elongated recesses disposed beneath said floor surface at the opposite sides of said entranceway and an elongated panel member slideably endwise received in each of said recesses, said enclosure structure including a pair of double doors each swingable to a closed position closing a corresponding side of said entranceway and the rear end of the associated recess.
Claim 10
Dependent Claim
92 words
The combination of claim 1 wherein the inner end of said ramp includes a depending stop flange and the outer portion of said recess includes an upwardly projecting stop flange, said ramp stop flange being engageable with the second mentioned stop flange to limit outward displacement of said ramp relative to said recess, the rear end of said ramp including dependingly supported rollers rollingly engaged with the lower extremity of said recess and the outer end of said recess includes upwardly projecting rollers rollingly engaged with the under surface of said ramp.
Claim 11
Dependent Claim
53 words
The combination of claim 9 wherein the inner end of said ramp includes a depending stop flange and the outer portion of said recess includes an upwardly projecting stop flange, said ramp stop flange being engageable with the second mentioned stop flange to limit outward displacement of said ramp relative to said recess.
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) | 1976-01-23 | 1976-07-24 | 1977-01-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-01-23 | 1980-07-24 | 1981-01-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-01-23 | 1984-07-24 | 1985-01-23 | $7700.00 | Window Closed / Lapsed |