US3851776A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Vehicle with counter weight turrent lock
Assignee: Poclain SA
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Filing: 1973-04-09
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Granted: 1974-12-03
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Expires: 1993-04-09
Abstract
Abstract A tracked vehicle is disclosed with a rotary turret on the vehicle frame; a counterweight is carried by a parallelogram linkage on one side of the frame movable between an extended position engaging a recess in the bottom of the turret to prevent undesired rotation of the turret and counterbalance a load carried by boom means on the diametrically opposite side of the turret.
Inventors
- 👤 P Leyrat
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 06:39
CPC Classifications
E; E02; E02F; E02F9/00; E02F9/18
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
138 words
A work vehicle having a vehicle frame supported by groundengaging rolling members, a turret mounted to pivot about a vertical axis on the vehicle frame, work supporting means mounted on said turret and extending outwardly from said turret, a deformable quadrilateral support frame connected on one end to one side of said vehicle frame, a counterweight supported by said quadrilateral support frame, a stirrup carried on the lower portion of said turret comprising two spaced arms, a locking plate integral with said counterweight, said deformable quadrilateral frame being movable between a first or retracted position in which the counterweight is closely adjacent the vehicle frame and an extended position in which said locking plate is engageable with said stirrup between said spaced arms to lock said turret against rotation while simultaneously providing a counterweight function for said vehicle.
Claim 2
Dependent Claim
138 words
A work vehicle having a vehicle frame supported by groundengaging rolling members, a turret mounted to pivot about a vertical axis on the vehicle frame, work supporting means mounted on said turret and extending outwardly from said turret, a deformable quadrilateral support frame connected on one end to one side of said vehicle frame, a counterweight supported by said quadrilateral support frame, a stirrup carried on the lower portion of said turret comprising two spaced arms, a locking plate integral with said counterweight, said deformable quadrilateral frame being movable between a first or retracted position in which the counterweight is closely adjacent the vehicle frame and an extended position in which said locking plate is engageable with said stirrup between said spaced arms to lock said turret against rotation while simultaneously providing a counterweight function for said vehicle.
Claim 3
Dependent Claim
39 words
The invention of claim 1 wherein said counterweight is partially positioned inwardly of the outer side extremities of said vehicle when said deformable quadrilateral frame is in said retracted position so as to minimize the width of the vehicle.
References Cited (Backward Citations)
US3536218A
Cited
US3567049A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-12-02 | 1978-06-03 | 1978-12-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-12-02 | 1982-06-03 | 1982-12-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-12-02 | 1986-06-03 | 1986-12-03 | $7700.00 | Window Closed / Lapsed |