US4174854A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Building and constructional machines or vehicles
Assignee: Zettelmeyer Baumaschinen GmbH
•
Filing: 1978-03-06
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Granted: 1979-11-20
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Expires: 1998-03-06
Abstract
Abstract The running gear of a construction vehicle or the like is provided with a resilient suspension adapted to be effective in transport operations and ineffective in working operations.
Inventors
- 👤 Roland Spicka
- 👤 Adolf Krob
- 👤 Detlev Seidel
- 👤 Paul Viefhaus
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 20:05
CPC Classifications
B; B60; B60G; B60G17/00; B60G17/005; E; E02; E02F; E02F3/00; E02F3/04; E02F3/76; E02F3/80; E02F3/815; E02F3/84; E02F9/00; E02F9/02; E02F9/08; E02F9/0841; E02F9/20; E02F9/22; E02F9/2217; B60G2300/00; B60G2300/09
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
78 words
A construction vehicle, comprising running gear means, wheel axles mounted on said gear means and wheels mounted on said axles, a resilient suspension system on said running gear means for cushioning the vehicle during transport, means for pressurizing and depressurizing said system for respectively resiliently cushioning said running gear during vehicle transport and for rigidifying said running gear during a working operation, and means for locking at least one of said axles against cushioning during said working operation.
Claim 2
Dependent Claim
78 words
A construction vehicle, comprising running gear means, wheel axles mounted on said gear means and wheels mounted on said axles, a resilient suspension system on said running gear means for cushioning the vehicle during transport, means for pressurizing and depressurizing said system for respectively resiliently cushioning said running gear during vehicle transport and for rigidifying said running gear during a working operation, and means for locking at least one of said axles against cushioning during said working operation.
Claim 3
Dependent Claim
51 words
The vehicle according to claim 1, wherein said locking means includes means for carrying out an automatic locking operation upon inoperation of said suspension system as when said system is depressurized, and for carrying out an automatic unlocking operation upon operation of said suspension system as when said system is pressurized.
Claim 4
Dependent Claim
36 words
The vehicle according to claim 1, wherein said running gear means include a frame and front and rear levers mounted on said frame for pivotal movement about horizontal axes, said suspension system including spring cylinder units.
Claim 5
Dependent Claim
23 words
The vehicle according to claim 3, wherein said locking means are disposed for locking at least one of said levers to said frame.
Claim 6
Dependent Claim
17 words
The vehicle according to claim 3, wherein said locking means include at least one locking cylinder unit.
Claim 7
Dependent Claim
29 words
The vehicle according to claim 5, wherein said locking cylinder unit is mounted on one of said levers and is movable into and out of engagement with said frame.
Claim 8
Dependent Claim
21 words
The vehicle according to claim 3, wherein said frame has abutment means thereon for limiting the pivotal movement of said levers.
Claim 9
Dependent Claim
18 words
The vehicle according to claim 3, wherein transverse links are provided on said levers adjacent said wheel axles.
Claim 10
Dependent Claim
18 words
The vehicle according to claim 3, wherein transverse stabilizers are provided on said levers adjacent said wheel axles.
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) | 1982-11-19 | 1983-05-21 | 1983-11-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-11-19 | 1987-05-21 | 1987-11-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-11-19 | 1991-05-21 | 1991-11-20 | $7700.00 | Window Closed / Lapsed |