US3709518A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and device for maneuvering the stabilizing stays of a mechanical earth-working vehicle
Assignee: Poclain SA
•
Filing: 1970-04-10
•
Granted: 1973-01-09
•
Expires: 1990-04-10
Abstract
Abstract This invention relates to a method for extending the stabilizing stays of a mechanical earth-working vehicle, comprising at least two groups of stays capable of abutting on the ground, according to which method the stays of the first group are extended until they abut on fixed stops, wherein the stays of the second group are simultaneously extended into an intermediate position between the positions stays extended and stays retracted, determined as a function of the shape of the vehicle. The invention also relates to a stabilizing device applying the method as described above, wherein the stays are attached to hydraulic rams distributed in at least two groups capable of being supplied by a source of pressurized fluid, wherein an output divider is connected to the source of pressurized fluid by a conduit and to each of the two groups of stays by a conduit separated by a group of stays.
Inventors
- 👤 Y Gauchet
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 07:24
CPC Classifications
B; B66; B66C; B66C23/00; B66C23/62; B66C23/72; B66C23/78; B66C23/80
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
262 words
A stabilizing device for use with mechanical earth-working vehicles comprising a chassis; at least two groups of stabilizing stays mounted on said chassis, said first of said two groups of stays operatively connected to a single hydraulic ram means mounted on said chassis, for extending and retracting said stays, said second of said two groups of stays comprising a pair of stays mounted on said chassis, each of said pair of stays being operatively connected with a hydraulic ram means for extending and retracting each of said pair of stays, wherein the volume of the chamber of the hydraulic ram means of said first group of stays in the retracted position is proportional to the sum of the volumes of the chambers of the hydraulic ram means of said second group of stays in the retracted position, control means communicating to each of said ram means for selectively controlling the movement of said stays, said control means having a source of pressurized fluid, conduit means for supplying said fluid to said ram means and an output divider for controlling the distribution of said fluid to said hydraulic rams for maintaining the sum of the volume of the fluid in the hydraulic ram means of said second group proportional to the volume of the fluid in the hydraulic ram of said first group whereby the sum of the strokes of the stays of said second groups from their retracted positions presents a constant ratio with respect to the sum of the strokes of said stays of said first group from their retracted position.
Claim 2
Dependent Claim
262 words
A stabilizing device for use with mechanical earth-working vehicles comprising a chassis; at least two groups of stabilizing stays mounted on said chassis, said first of said two groups of stays operatively connected to a single hydraulic ram means mounted on said chassis, for extending and retracting said stays, said second of said two groups of stays comprising a pair of stays mounted on said chassis, each of said pair of stays being operatively connected with a hydraulic ram means for extending and retracting each of said pair of stays, wherein the volume of the chamber of the hydraulic ram means of said first group of stays in the retracted position is proportional to the sum of the volumes of the chambers of the hydraulic ram means of said second group of stays in the retracted position, control means communicating to each of said ram means for selectively controlling the movement of said stays, said control means having a source of pressurized fluid, conduit means for supplying said fluid to said ram means and an output divider for controlling the distribution of said fluid to said hydraulic rams for maintaining the sum of the volume of the fluid in the hydraulic ram means of said second group proportional to the volume of the fluid in the hydraulic ram of said first group whereby the sum of the strokes of the stays of said second groups from their retracted positions presents a constant ratio with respect to the sum of the strokes of said stays of said first group from their retracted position.
Claim 3
Dependent Claim
34 words
The device of claim 1 including a control valve for selectively placing into communication with each other the chambers of the hydraulic rams of said second group of stays, and with said output divider.
Claim 4
Dependent Claim
48 words
The device of claim 2 including a fluid return conduit connected with each of the chambers of said rams, a fluid discharge reservoir, and a two-way distributor means for selectively placing said control valve in communication with said fluid turn conduit of said rams and said discharge reservoir.
References Cited (Backward Citations)
US2653624A
Cited
US2750204A
Cited
US2864625A
Cited
US3002760A
Cited
FR1407232A
Cited
US3442530A
Cited
US3397898A
Cited
US3550294A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-01-09 | 1976-07-10 | 1977-01-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-01-09 | 1980-07-10 | 1981-01-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-01-09 | 1984-07-10 | 1985-01-09 | $7700.00 | Window Closed / Lapsed |