US3784160A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Vehicle support system
Assignee: WILDWOOD PROD INC US
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Filing: 1972-11-09
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Granted: 1974-01-08
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Expires: 1992-11-09
Abstract
Abstract A vehicle support system for supporting the front and/or back end of travel vehicles and the like. The system includes first and second screw jack assemblies secured to the vehicle and a means to drive the jacks simultaneously with an equal torque into ground engaging position for self-leveling and lifting of the support system on any terrain. The jacks have drive shafts which drive extensible jack elements in the same direction when the drive shafts are rotated in opposite directions. A motor having an output shaft is mounted for free rotation with respect to the vehicle. The motor output shaft is coupled to one drive shaft and the motor housing is coupled to the other drive shaft.
Inventors
- 👤 D Phillips
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 23:07
CPC Classifications
B; B60; B60S; B60S9/00; B60S9/02; B60S9/04; B60S9/06; B60S9/08
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
184 words
A vehicle support assembly for retractably supporting an end of a vehicle body and the like; said vehicle support assembly comprising: first and second jacks, each of said jacks including a housing, an extendible member, and a drive shaft rotatable to extend and retract said extendible member with respect to said housing; means for mounting said jacks to said vehicle body in spaced relationship with respect to each other; a motor having a casing and an output shaft rotatably driven with respect to said casing; means coupling said motor output shaft of said motor to said first jack drive shaft; means coupling said motor casing to said second jack drive shaft so that said extendible member of said first and second jacks are driven in the same direction by rotation of said motor output shaft in one direction and rotation of said motor casing in an opposite direction; and said motor casing being freely rotatable with respect to said vehicle body so that each of said extendible members are driven downwardly with equal force by said motor, regardless of the terrain beneath said jacks.
Claim 2
Dependent Claim
184 words
A vehicle support assembly for retractably supporting an end of a vehicle body and the like; said vehicle support assembly comprising: first and second jacks, each of said jacks including a housing, an extendible member, and a drive shaft rotatable to extend and retract said extendible member with respect to said housing; means for mounting said jacks to said vehicle body in spaced relationship with respect to each other; a motor having a casing and an output shaft rotatably driven with respect to said casing; means coupling said motor output shaft of said motor to said first jack drive shaft; means coupling said motor casing to said second jack drive shaft so that said extendible member of said first and second jacks are driven in the same direction by rotation of said motor output shaft in one direction and rotation of said motor casing in an opposite direction; and said motor casing being freely rotatable with respect to said vehicle body so that each of said extendible members are driven downwardly with equal force by said motor, regardless of the terrain beneath said jacks.
Claim 3
Dependent Claim
57 words
A vehicle support assembly according to claim 1 wherein said first jack includes means to drive the extendible member thereof downwardly upon rotation of the drive shaft thereof in a first rotational direction, and said second jack includes means to drive the extendible member thereof downwardly upon rotation of the drive shaft tHereof in an opposite direction.
Claim 4
Dependent Claim
30 words
A vehicle support assembly according to claim 1 and further comprising means for supporting said motor casing and said motor output shaft for rotation with respect to said vehicle body.
Claim 5
Dependent Claim
54 words
A vehicle support assembly according to claim 3 and further comprising means to supply electrical power to said motor, said power supply means including a ring mounted on said casing coupling means for movement therewith, and a brush mounted on said vehicle body in operative contact with said ring to transfer electrical power thereto.
Claim 6
Dependent Claim
26 words
A vehicle support assembly according to claim 4 and further comprising means to lock said output shafts in selective extended positions when said motor is inoperative.
Claim 7
Dependent Claim
41 words
A vehicle support assembly according to claim 1 wherein said first and second jacks are screw jacks including a nut rotatably driven by said drive shafts, said extendible member is externally threaded and threadably engages said nut to be driven thereby.
Claim 8
Dependent Claim
20 words
A vehicle support assembly according to claim 1 wherein said jacks are mounted to a front portion of said trailer.
Claim 9
Dependent Claim
20 words
A vehicle support assembly according to claim 1 wherein said jacks are mounted to a rear portion of a trailer.
Claim 10
Dependent Claim
21 words
A vehicle support assembly according to claim 1 wherein said drive shafts of said first and second jacks are axially aligned.
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) | 1977-01-07 | 1977-07-09 | 1978-01-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-01-07 | 1981-07-09 | 1982-01-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-01-07 | 1985-07-09 | 1986-01-08 | $7700.00 | Window Closed / Lapsed |