Patent US4018465A successfully refreshed from Google Patents.
US4018465A
Expired / Lapsed
US
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Door opening device
Assignee: Individual
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Filing: 1975-10-20
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Granted: 1977-04-19
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Expires: 1995-10-20
Abstract
Abstract A door opening device for use by handicapped persons for whom it is physically difficult or impossible to turn a conventional door knob. The device comprises, in one embodiment, an attachment hanging from a standard round door knob. Other embodiments included lever devices of different configurations also attached to a knob or the shank of a knob to facilitate turning thereof. This device enables a handicapped person to move the lever in either direction with an elbow, hand or other part of the body in order to open a door.
Inventors
- 👤 David A. Ramler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 10:49
CPC Classifications
E; E05; E05B; E05B1/00; E05B1/0053; Y; Y10; Y10T; Y10T292/00; Y10T292/57; Y10T292/82; Y10T74/00; Y10T74/20; Y10T74/20576; Y10T74/20732; Y10T74/20834; Y10T74/20864
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
135 words
A device for assistance in opening a door having a round knob and a shank extending from the knob through said door, said device comprising: an elongated lever arm; and means for coupling said lever arm to said knob in such a manner that said knob rotates when forces are applied to said lever arm which are substantially parallel to the plane of said door; said lever arm comprising a pair of yolk arms encompassing at the open ends of said yolk arms a portion of the periphery of said knob; said means for coupling said lever arm to said knob comprising diametrically opposed pins formed on the ends of said yolk arms, said knob being formed with diametrically opposed holes in the periphery thereof, said ends being seated in said holes in said knob.
Claim 2
Independent Claim
135 words
A device for assistance in opening a door having a round knob and a shank extending from the knob through said door, said device comprising: an elongated lever arm; and means for coupling said lever arm to said knob in such a manner that said knob rotates when forces are applied to said lever arm which are substantially parallel to the plane of said door; said lever arm comprising a pair of yolk arms encompassing at the open ends of said yolk arms a portion of the periphery of said knob; said means for coupling said lever arm to said knob comprising diametrically opposed pins formed on the ends of said yolk arms, said knob being formed with diametrically opposed holes in the periphery thereof, said ends being seated in said holes in said knob.
Claim 3
Dependent Claim
47 words
The device recited in claim 1 wherein said knob is further formed with a stabilizing pin hole in its periphery spaced from said diametrically opposed holes, said device further comprising: a stabilizing pin secured to one of said yoke arms and projecting into said stabilizing pin hole.
Claim 4
Dependent Claim
43 words
The device recited in claim 1 wherein each of said diametrically opposed pins is scored at its connection with said yoke arms to enable said lever to break when excessive forces are applied thereto before damage occurs to said knob or said shank.
References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-04-18 | 1980-10-18 | 1981-04-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-04-18 | 1984-10-18 | 1985-04-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-04-18 | 1988-10-18 | 1989-04-19 | $7700.00 | Window Closed / Lapsed |