Patent US3976558A successfully refreshed from Google Patents.
Patent US3632086A successfully refreshed from Google Patents.
US3632086A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Landing gear for semitrailers or the like
Assignee: HAAMANN WINDEN HEBEZEUG
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Filing: 1970-05-20
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Granted: 1972-01-04
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Expires: 1990-05-20
Abstract
Abstract A landing gear for semitrailers or the like wherein the mechanisms which move the landing wheels up and down receive motion from a hollow output shaft which can be driven at two speeds in response to rotation of an input shaft. The latter is axially movably received in and extends beyond the ends of the output shaft, and each of its ends can be engaged and rotated by a crank handle or the like so that the landing gear can be manipulated from either side of the vehicle. In one of its axial positions, the input shaft is directly coupled to and rotates the output shaft. In another axial position, the input shaft rotates the output shaft by way of a stepdown transmission.
Inventors
- 👤 Erich Mai
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 23:44
CPC Classifications
B; B60; B60D; B60D1/00; B60D1/58; B60D1/66; B60S; B60S9/00; B60S9/14; B60S9/16; B60S9/18
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
101 words
A landing gear for vehicles, particularly for semitrailers, comprising two supporting members; two discrete mechanisms each operative to move one of said supporting members into and away from engagement wIth the ground and each having a rotary-driven portion; a hollow rotary output shaft operatively connected with said driven portions; an input shaft axially movably received in and extending beyond the ends of said output shaft; a multispeed transmission arranged to respectively provide a lower speed and a higher speed torque-transmitting connection between said shafts in first and second axial positions of said input shaft; and means for rotating said input shaft.
Claim 2
Dependent Claim
101 words
A landing gear for vehicles, particularly for semitrailers, comprising two supporting members; two discrete mechanisms each operative to move one of said supporting members into and away from engagement wIth the ground and each having a rotary-driven portion; a hollow rotary output shaft operatively connected with said driven portions; an input shaft axially movably received in and extending beyond the ends of said output shaft; a multispeed transmission arranged to respectively provide a lower speed and a higher speed torque-transmitting connection between said shafts in first and second axial positions of said input shaft; and means for rotating said input shaft.
Claim 3
Dependent Claim
84 words
A landing gear as defined in claim 1, wherein said transmission comprises an intermediate shaft, a first gear on said intermediate shaft, a pinion on said intermediate shaft, a second gear provided on said output shaft and meshing with said pinion, a third gear provided on said input shaft and meshing with said first gear in the first axial position of said input shaft, and coupling means connecting said input shaft with said output shaft in the second axial position of said input shaft.
Claim 4
Dependent Claim
18 words
A landing gear as defined in claim 2, wherein said coupling means includes said second and third gears.
Claim 5
Dependent Claim
36 words
A landing gear as defined in claim 1, wherein said input shaft comprises a hollow cylindrical portion and a tension rod received in and arranged to enhance the resistance of said cylindrical portion to torsional stresses.
Claim 6
Dependent Claim
29 words
A landing gear as defined in claim 4, wherein said input shaft further comprises a solid rod-shaped portion connected with said tension rod and operatively connected with said transmission.
Claim 7
Dependent Claim
38 words
A landing gear as defined in claim 1, wherein said means for rotating the input shaft comprises at least one crank handle movable between collapsed and extended positions and secured to one end portion of said input shaft.
Claim 8
Dependent Claim
32 words
A landing gear as defined in claim 6, further comprising means for connecting said crank handle to said input shaft for axial movement therewith in the extended position of said crank handle.
Claim 9
Dependent Claim
63 words
A landing gear as defined in claim 1, wherein said supporting members are landing wheels and each of said mechanisms further comprises a tubular outer leg, an inner leg telescoped into said outer leg and connected with the respective landing wheel, and means for moving said inner leg with reference to said outer leg in response to rotation of the respective driven portion.
Claim 10
Dependent Claim
28 words
A landing gear as defined in claim 1, wherein said means for rotating said input shaft comprises two crank handles, one at each end of said input shaft.
Claim 11
Dependent Claim
20 words
A landing gear as defined in claim 1, wherein said transmission includes a case supported by one of said mechanisms.
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) | 1975-01-03 | 1975-07-05 | 1976-01-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-01-03 | 1979-07-05 | 1980-01-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-01-03 | 1983-07-05 | 1984-01-04 | $7700.00 | Window Closed / Lapsed |