US4113121A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pin release device for a wheelchair lift
Assignee: Collins Industries Inc
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Filing: 1977-08-15
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Granted: 1978-09-12
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Expires: 1997-08-15
Abstract
Abstract A pin release device for releasing a wheelchair lift platform attached to a lift frame mounted in an opening in a vehicle. The lift platform pivotally mounted to the bottom of the frame and stored in a vertical position in the opening. When for one reason or another, the power used in raising and lowering the lift fails, the device may be used to lower the lift platform manually to a horizontal position so that a wheelchair may be loaded thereon and removed from the vehicle.
Inventors
- 👤 Donald L. Collins
- 👤 Harold A. Downing
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 04:30
CPC Classifications
B; B60; B60P; B60P1/00; B60P1/44; A; A61; A61G; A61G3/00; A61G3/02; A61G3/06; A61G3/062; Y; Y10; Y10S; Y10S414/00; Y10S414/134; Y10T; Y10T292/00; Y10T292/08; Y10T292/096; Y10T292/0969; Y10T292/097; Y10T292/0972
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
175 words
A pin release device for a wheelchair lift platform, the lift platform mounted in an opening of a vehicle and attached to a lift frame adjacent the opening, the lift platform is stored in a vertical position in the vehicle and lowered to a horizontal position for loading a wheelchair thereon, the device used for releasing the lift platform from the lift frame so that the lift platform may be lowered when the source of power normally used in lowering the lift platform fails, the device comprising: an elongated handle pivotally mounted on the lift platform; a pin arm attached at one end to said handle; a pin slidably received in a pin guide mounted on the lift platform, one end of said pin attached to the other end of said pin arm, the other end of said pin releasably engaging the side of the lift frame; and biasing means attached to the lift platform and said handle for pivoting said handle and holding said pin in engagement with the side of the lift frame.
Claim 2
Dependent Claim
175 words
A pin release device for a wheelchair lift platform, the lift platform mounted in an opening of a vehicle and attached to a lift frame adjacent the opening, the lift platform is stored in a vertical position in the vehicle and lowered to a horizontal position for loading a wheelchair thereon, the device used for releasing the lift platform from the lift frame so that the lift platform may be lowered when the source of power normally used in lowering the lift platform fails, the device comprising: an elongated handle pivotally mounted on the lift platform; a pin arm attached at one end to said handle; a pin slidably received in a pin guide mounted on the lift platform, one end of said pin attached to the other end of said pin arm, the other end of said pin releasably engaging the side of the lift frame; and biasing means attached to the lift platform and said handle for pivoting said handle and holding said pin in engagement with the side of the lift frame.
Claim 3
Dependent Claim
30 words
The device as described in claim 1, wherein said biasing means is a coil spring held in compression between a side of said handle and a portion of said platform.
Claim 4
Dependent Claim
22 words
The device as described in claim 1, wherein the end of said pin engaging the side of the lift frame is beveled.
Claim 5
Dependent Claim
286 words
A pin release device for a wheelchair lift platform, the lift platform mounted in an opening of a vehicle and attached to a lift frame adjacent the opening, the lift platform is stored in a vertical position in the vehicle and lowered to a horizontal position for loading a wheelchair thereon, the device used for releasing the lift platform from the lift frame so that the lift platform may be lowered when the source of power normally used in lowering the lift platform fails, the device comprising: an elongated handle having a side flange portion, one end of said handle used for gripping said handle, the other end of said handle having a bushing attached thereto, the bushing receiving a bolt therethrough for pivoting said handle thereon; a support plate attached to the lift platform, the bolt received in the bushing of said handle attached to said support plate; a pin arm, one end of said pin arm attached to said handle; a pin slidably received in a pin guide mounted on the lift platform, one end of said pin attached to the other end of said pin arm, the other end of said pin beveled for releasably engaging the side of the lift frame; and a coil spring held in compression between the side flange portion of said handle and a portion of said lift platform and attached thereto, said coil spring pivoting said handle in one direction and holding said pin in engagement with the side of the lift frame; and by pivoting said handle in an opposite direction and compressing said coil spring, the pin is released from the side of the lift frame so that the lift platform may be manually lowered.
Claim 6
Dependent Claim
286 words
A pin release device for a wheelchair lift platform, the lift platform mounted in an opening of a vehicle and attached to a lift frame adjacent the opening, the lift platform is stored in a vertical position in the vehicle and lowered to a horizontal position for loading a wheelchair thereon, the device used for releasing the lift platform from the lift frame so that the lift platform may be lowered when the source of power normally used in lowering the lift platform fails, the device comprising: an elongated handle having a side flange portion, one end of said handle used for gripping said handle, the other end of said handle having a bushing attached thereto, the bushing receiving a bolt therethrough for pivoting said handle thereon; a support plate attached to the lift platform, the bolt received in the bushing of said handle attached to said support plate; a pin arm, one end of said pin arm attached to said handle; a pin slidably received in a pin guide mounted on the lift platform, one end of said pin attached to the other end of said pin arm, the other end of said pin beveled for releasably engaging the side of the lift frame; and a coil spring held in compression between the side flange portion of said handle and a portion of said lift platform and attached thereto, said coil spring pivoting said handle in one direction and holding said pin in engagement with the side of the lift frame; and by pivoting said handle in an opposite direction and compressing said coil spring, the pin is released from the side of the lift frame so that the lift platform may be manually lowered.
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) | 1981-09-11 | 1982-03-13 | 1982-09-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-09-11 | 1986-03-13 | 1986-09-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-09-11 | 1990-03-13 | 1990-09-12 | $7700.00 | Window Closed / Lapsed |