Patent US2513860A successfully refreshed from Google Patents.
Patent US4042992A successfully refreshed from Google Patents.
US4042992A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Portable reinforced loading ramp
Assignee: STINSON MANUFACTURING Co Inc A CORP OF WA
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Filing: 1976-08-30
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Granted: 1977-08-23
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Expires: 1996-08-30
Abstract
Abstract A portable reinforced loading ramp is described that is transversely expandable to enable the ramp to be used for loading automobiles. The ramp is constructed with two body sections having means for interconnecting the two body sections to hold the two sections securely together when the ramp is in the contracted position. The interconnecting means includes two longitudinally spaced alignment and locking assemblies for holding the two sections securely together to prevent the two sections from spreading under high load conditions when in the contracted position and for quickly disconnecting the two sections to enable the two sections to be spaced from each other to accommodate wide loads such as an automobile.
Inventors
- 👤 Robert C. Hyslop
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 17:22
CPC Classifications
B; B65; B65G; B65G69/00; B65G69/28; B65G69/30
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
306 words
A portable reinforced loading ramp capable of being transversely expanded to load an automobile through a wide opening and of being transversely contracted to load dolly-supported freight through a narrow opening, comprising: a first elongated body section having an outer raised side edge and an inner side face and integral reinforcing support ribs; a second elongated body section having an outer raised side edge and an inner side face complementary to the inner side face of the first elongated body section and integral reinforcing supporting ribs; interconnecting means operatively interconnecting the first and second body section with the inner side faces engaging when the ramp is in the contracted position; said interconnecting means includes at least two alignment and locking assemblies mounted to the body section adjacent the inner side faces at longitudinally spaced locations for longitudinally aligning the body sections with respect to each other and for locking the body sections together with the inner side faces engaging when the ramp is in the contracted position; wherein the interconnecting means includes parallel elongated mounting plates mounted to respective elongated body section adjacent the inner side faces and extending between the longitudinally spaced locations for supporting the alignment and locking assemblies rigidly to the body section; each of said alignment and locking assemblies comprising; 1. a male shaft element mounted to one of the mounting plates and projecting therefrom transversely to the longitudinal direction of the one body section; 2. a female open-ended cylinder element mounted to the other mounting plate and directed transversely to the longitudinal direction of the other body section for receiving the male shaft element therein when the ramp is contracted to longitudinally align the body sections and prevent longitudinal movement therebetween; and 3. locking means for releasably securing the male shaft element in the cylinder element when the ramp is contracted.
Claim 2
Dependent Claim
306 words
A portable reinforced loading ramp capable of being transversely expanded to load an automobile through a wide opening and of being transversely contracted to load dolly-supported freight through a narrow opening, comprising: a first elongated body section having an outer raised side edge and an inner side face and integral reinforcing support ribs; a second elongated body section having an outer raised side edge and an inner side face complementary to the inner side face of the first elongated body section and integral reinforcing supporting ribs; interconnecting means operatively interconnecting the first and second body section with the inner side faces engaging when the ramp is in the contracted position; said interconnecting means includes at least two alignment and locking assemblies mounted to the body section adjacent the inner side faces at longitudinally spaced locations for longitudinally aligning the body sections with respect to each other and for locking the body sections together with the inner side faces engaging when the ramp is in the contracted position; wherein the interconnecting means includes parallel elongated mounting plates mounted to respective elongated body section adjacent the inner side faces and extending between the longitudinally spaced locations for supporting the alignment and locking assemblies rigidly to the body section; each of said alignment and locking assemblies comprising; 1. a male shaft element mounted to one of the mounting plates and projecting therefrom transversely to the longitudinal direction of the one body section; 2. a female open-ended cylinder element mounted to the other mounting plate and directed transversely to the longitudinal direction of the other body section for receiving the male shaft element therein when the ramp is contracted to longitudinally align the body sections and prevent longitudinal movement therebetween; and 3. locking means for releasably securing the male shaft element in the cylinder element when the ramp is contracted.
Claim 3
Dependent Claim
39 words
The reinforced ramp is defined in claim 1 wherein the locking means includes transverse aperture formed in the shaft element and a locking pin for inserting through the aperture to lock the shaft element in the corresponding cylinder element.
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) | 1980-08-22 | 1981-02-21 | 1981-08-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-08-22 | 1985-02-21 | 1985-08-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-08-22 | 1989-02-21 | 1989-08-23 | $7700.00 | Window Closed / Lapsed |