US3870126A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cart stop structure for an elevator
Assignee: LEYMAN Manufacturing CORP
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Filing: 1973-07-18
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Granted: 1975-03-11
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Expires: 1993-07-18
Abstract
Abstract A cart stop structure for an elevator of the type particularly adapted for mounting at the rear end of a cargo trailer. Two separate chocks are permanently connected to the elevator''s platform, the platform being wide enough to accommodate three carts side by side (as opposed to end to end) across its width. The chocks are movable between a storage position either dropped flush with the platform''s floor or pivoted adjacent the platform''s side walls (depending on the specific structural embodiment used) so the carts may be easily rolled onto or off the elevator platform, and an operative position adjacent the platform''s free edge in linear relation one with the other where carts on the platform are prevented from rolling off the platform during raising and lowering of the platform. Each chock is of a length sufficient to block both wheels of that cart adjacent its related side of the platform as well as one wheel of the cart in the center of the platform. This allows one side cart and the center cart on the platform to remain chocked while the other side cart is being removed, thereafter allows that one side cart to be removed while the center cart remains chocked, and thereafter allows the center cart to be removed, during unloading simply by manipulating the two chocks in a set sequence.
Inventors
- 👤 William H Himes
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 01:50
CPC Classifications
B; B60; B60P; B60P1/00; B60P1/44; B60P1/4457
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
108 words
An elevator platform of a width adapted to carry three separate wheeled carts side by side, said platform including two separate chocks, each of said chocks being of a length sufficient to block both wheels of that cart adjacent its related side of said platform as well as one wheel of that cart in the center of said platform, and a hinge connecting each of said chocks to said platform, said chocks being independently movable between a storage position that allows the carts to be rolled off said platform and an operative position adjacent the platform''s free edge where the carts are prevented from rolling off said platform.
Claim 2
Dependent Claim
108 words
An elevator platform of a width adapted to carry three separate wheeled carts side by side, said platform including two separate chocks, each of said chocks being of a length sufficient to block both wheels of that cart adjacent its related side of said platform as well as one wheel of that cart in the center of said platform, and a hinge connecting each of said chocks to said platform, said chocks being independently movable between a storage position that allows the carts to be rolled off said platform and an operative position adjacent the platform''s free edge where the carts are prevented from rolling off said platform.
Claim 3
Dependent Claim
59 words
an elevator platform as set forth in claim 1, said chocks being permanently connected to said platform, and said chocks being swingable on a vertical axis between a chocking attitude where same are disposed transverse to the travel path of said wheeled vehicles and a storage attitude where same are disposed parallel to the travel path of said vehicles.
Claim 4
Dependent Claim
53 words
An elevator platform as set forth in claim 1, said chocks being permanently connected to said platform, said chocks being swingable on a horizontal axis between a chocking attitude where same are upraised into the travel path of said wheeled vehicle and a storage attitude where same drop flush with the platform''s floor.
Claim 5
Dependent Claim
55 words
An elevator platform as set forth in claim 1 wherein said elevator platform is mounted at the rear end of a cargo trailer, said platform being adapted to move between floor level of said trailer and ground level, said chocks serving to maintain said carts on said platform during loading and unloading of said trailer.
Claim 6
Dependent Claim
246 words
An elevator platform of a width adapted to hold a wheeled vehicle during up and down operation of said platform, said platform comprising a chock bar permanently connected to a floor surface of said platform, said permanent connection permitting movement of said chock bar on a vertical hinge line between a choCking attitude where said chock bar is located transverse to the travel path of said wheeled vehicle across said floor and a storage attitude where said chock bar is located parallel to the travel path of said wheeled vehicle, and said permanent connection comprising a hinge pin fixed to the underside of said chock bar, said hinge pin being received in permanent pivot relationship with said floor, primary latch means fixed to said chock bar, said primary latch means on said chock bar cooperating with secondary latch means in said floor to insure that said chock bar is retained in chocking attitude when disposed in the chocking attitude, and said primary latch means including a latch pin fixed to the underside of said chock bar and said secondary latch means including structure defining a hole in said floor, and said latch pin and hinge pin each cooperating with a collar fixed to said floor, the diameter of said hinge and latch pins relative to the diameter of said collars providing a sloppiness of fit that allows said chock bar to be easily lifted out of chocking attitude and swung to storage attitude, and vice versa.
Claim 7
Dependent Claim
246 words
An elevator platform of a width adapted to hold a wheeled vehicle during up and down operation of said platform, said platform comprising a chock bar permanently connected to a floor surface of said platform, said permanent connection permitting movement of said chock bar on a vertical hinge line between a choCking attitude where said chock bar is located transverse to the travel path of said wheeled vehicle across said floor and a storage attitude where said chock bar is located parallel to the travel path of said wheeled vehicle, and said permanent connection comprising a hinge pin fixed to the underside of said chock bar, said hinge pin being received in permanent pivot relationship with said floor, primary latch means fixed to said chock bar, said primary latch means on said chock bar cooperating with secondary latch means in said floor to insure that said chock bar is retained in chocking attitude when disposed in the chocking attitude, and said primary latch means including a latch pin fixed to the underside of said chock bar and said secondary latch means including structure defining a hole in said floor, and said latch pin and hinge pin each cooperating with a collar fixed to said floor, the diameter of said hinge and latch pins relative to the diameter of said collars providing a sloppiness of fit that allows said chock bar to be easily lifted out of chocking attitude and swung to storage attitude, and vice versa.
Claim 8
Dependent Claim
246 words
An elevator platform of a width adapted to hold a wheeled vehicle during up and down operation of said platform, said platform comprising a chock bar permanently connected to a floor surface of said platform, said permanent connection permitting movement of said chock bar on a vertical hinge line between a choCking attitude where said chock bar is located transverse to the travel path of said wheeled vehicle across said floor and a storage attitude where said chock bar is located parallel to the travel path of said wheeled vehicle, and said permanent connection comprising a hinge pin fixed to the underside of said chock bar, said hinge pin being received in permanent pivot relationship with said floor, primary latch means fixed to said chock bar, said primary latch means on said chock bar cooperating with secondary latch means in said floor to insure that said chock bar is retained in chocking attitude when disposed in the chocking attitude, and said primary latch means including a latch pin fixed to the underside of said chock bar and said secondary latch means including structure defining a hole in said floor, and said latch pin and hinge pin each cooperating with a collar fixed to said floor, the diameter of said hinge and latch pins relative to the diameter of said collars providing a sloppiness of fit that allows said chock bar to be easily lifted out of chocking attitude and swung to storage attitude, and vice versa.
Claim 9
Dependent Claim
246 words
An elevator platform of a width adapted to hold a wheeled vehicle during up and down operation of said platform, said platform comprising a chock bar permanently connected to a floor surface of said platform, said permanent connection permitting movement of said chock bar on a vertical hinge line between a choCking attitude where said chock bar is located transverse to the travel path of said wheeled vehicle across said floor and a storage attitude where said chock bar is located parallel to the travel path of said wheeled vehicle, and said permanent connection comprising a hinge pin fixed to the underside of said chock bar, said hinge pin being received in permanent pivot relationship with said floor, primary latch means fixed to said chock bar, said primary latch means on said chock bar cooperating with secondary latch means in said floor to insure that said chock bar is retained in chocking attitude when disposed in the chocking attitude, and said primary latch means including a latch pin fixed to the underside of said chock bar and said secondary latch means including structure defining a hole in said floor, and said latch pin and hinge pin each cooperating with a collar fixed to said floor, the diameter of said hinge and latch pins relative to the diameter of said collars providing a sloppiness of fit that allows said chock bar to be easily lifted out of chocking attitude and swung to storage attitude, and vice versa.
Claim 10
Dependent Claim
39 words
A chock structure as set forth in claim 5 including a handle at the swinging end of said chock bar, said handle allowing said chock bar to be easily lifted and swung from storage to chocking attitude as desired.
Claim 11
Dependent Claim
69 words
A chock structure as set forth in claim 5, said chock bar being hingedly connected to an elevator''s platform adjacent the free edge thereof, and including a ramp hingedly connected to the free edge of said platform, said chock bar being adapted to overlie and be supported by said ramp when in the storage attitude and being aligned parallel with the platform''s free edge when in the chocking attitude.
Claim 12
Dependent Claim
225 words
An elevator platform of a width adapted to hold a wheeled vehicle during up and down operation of said platform, said platform comprising a chock plate connected to a floor surface of said platform along a hinged edge thereof, said plate being adapted to pivot on a horizontal axis between a storage attitude where same is angularly upraised with respect to said floor and disposed transverse to the travel path of said wheeled vehicle, a latch plate hingedly connected adjacent the free edge of said chock plate, said latch plate being movable relative to said chock plate as said chock plate is pivoted between storage and chocking attitudes, a well provided in said floor within which said latch plate is positioned when said chock plate is in the storage attitude, thereby permitting said chock plate to lie flush with said floor, and immobile ledge means fixed to one side wall of said well, said latch plate being provided with a center of gravity such that said latch plate pivots toward that side wall of said well which mounts said ledge means as said chock plate is raised, said latch plate being trapped on said ledge means upon lowering said chock plate after said latch plate has been raised sufficiently to clear said ledge means initially, thereby restraining said chock plate in an angularly upraised position.
Claim 13
Dependent Claim
225 words
An elevator platform of a width adapted to hold a wheeled vehicle during up and down operation of said platform, said platform comprising a chock plate connected to a floor surface of said platform along a hinged edge thereof, said plate being adapted to pivot on a horizontal axis between a storage attitude where same is angularly upraised with respect to said floor and disposed transverse to the travel path of said wheeled vehicle, a latch plate hingedly connected adjacent the free edge of said chock plate, said latch plate being movable relative to said chock plate as said chock plate is pivoted between storage and chocking attitudes, a well provided in said floor within which said latch plate is positioned when said chock plate is in the storage attitude, thereby permitting said chock plate to lie flush with said floor, and immobile ledge means fixed to one side wall of said well, said latch plate being provided with a center of gravity such that said latch plate pivots toward that side wall of said well which mounts said ledge means as said chock plate is raised, said latch plate being trapped on said ledge means upon lowering said chock plate after said latch plate has been raised sufficiently to clear said ledge means initially, thereby restraining said chock plate in an angularly upraised position.
Claim 14
Dependent Claim
225 words
An elevator platform of a width adapted to hold a wheeled vehicle during up and down operation of said platform, said platform comprising a chock plate connected to a floor surface of said platform along a hinged edge thereof, said plate being adapted to pivot on a horizontal axis between a storage attitude where same is angularly upraised with respect to said floor and disposed transverse to the travel path of said wheeled vehicle, a latch plate hingedly connected adjacent the free edge of said chock plate, said latch plate being movable relative to said chock plate as said chock plate is pivoted between storage and chocking attitudes, a well provided in said floor within which said latch plate is positioned when said chock plate is in the storage attitude, thereby permitting said chock plate to lie flush with said floor, and immobile ledge means fixed to one side wall of said well, said latch plate being provided with a center of gravity such that said latch plate pivots toward that side wall of said well which mounts said ledge means as said chock plate is raised, said latch plate being trapped on said ledge means upon lowering said chock plate after said latch plate has been raised sufficiently to clear said ledge means initially, thereby restraining said chock plate in an angularly upraised position.
Claim 15
Dependent Claim
225 words
An elevator platform of a width adapted to hold a wheeled vehicle during up and down operation of said platform, said platform comprising a chock plate connected to a floor surface of said platform along a hinged edge thereof, said plate being adapted to pivot on a horizontal axis between a storage attitude where same is angularly upraised with respect to said floor and disposed transverse to the travel path of said wheeled vehicle, a latch plate hingedly connected adjacent the free edge of said chock plate, said latch plate being movable relative to said chock plate as said chock plate is pivoted between storage and chocking attitudes, a well provided in said floor within which said latch plate is positioned when said chock plate is in the storage attitude, thereby permitting said chock plate to lie flush with said floor, and immobile ledge means fixed to one side wall of said well, said latch plate being provided with a center of gravity such that said latch plate pivots toward that side wall of said well which mounts said ledge means as said chock plate is raised, said latch plate being trapped on said ledge means upon lowering said chock plate after said latch plate has been raised sufficiently to clear said ledge means initially, thereby restraining said chock plate in an angularly upraised position.
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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) | 1978-03-10 | 1978-09-09 | 1979-03-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-03-10 | 1982-09-09 | 1983-03-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-03-10 | 1986-09-09 | 1987-03-11 | $7700.00 | Window Closed / Lapsed |