US3778940A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Transferential pin
Assignee: Ingersoll Rand Co
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Filing: 1972-06-29
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Granted: 1973-12-18
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Expires: 1992-06-29
Abstract
Abstract A vehicle mounted tower pivoted on the vehicle by two pivot joints spaced along the length of the tower and alternately engageable during the swinging of the tower between horizontal and vertical positions by a hydraulic cylinder extending between the vehicle chassis and the tower. Alternate use of spaced pivot points reduces the loading on the lift cylinder and improves angular control in drilling operations.
Inventors
- 👤 W Blecken
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 00:09
CPC Classifications
E; E21; E21B; E21B7/00; E21B7/02
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
189 words
A tower assembly, comprising: an elongated tower; a first extensible power means, pivotally coupled at one end thereof to a median point along said tower, for moving said tower relative to a platform, said first power means having means for pivotally coupling the other end thereof to a platform; and a plurality of pivot means cooperative with said first power means and serving as pivot axes for the rotation of said tower relative to said platform, said pivot means having their axes offset from each other generally along the length of the said tower and being disengageable, whereby the pivot axis of said tower during its movement between horizontal and vertical positions can be transferred to the different axes by said pivot means; wherein the pivot means comprise a pivot pin means and a pivot pin locking means having jaw plates with a recess adapted to receive the pin means, a latch plate mounted on a shaft, the shaft pivotally mounted through the jaw plates whereby the latch plate will securely capture a pivot pin means when said pin means is inserted in the recesses of the jaw plates.
Claim 2
Dependent Claim
189 words
A tower assembly, comprising: an elongated tower; a first extensible power means, pivotally coupled at one end thereof to a median point along said tower, for moving said tower relative to a platform, said first power means having means for pivotally coupling the other end thereof to a platform; and a plurality of pivot means cooperative with said first power means and serving as pivot axes for the rotation of said tower relative to said platform, said pivot means having their axes offset from each other generally along the length of the said tower and being disengageable, whereby the pivot axis of said tower during its movement between horizontal and vertical positions can be transferred to the different axes by said pivot means; wherein the pivot means comprise a pivot pin means and a pivot pin locking means having jaw plates with a recess adapted to receive the pin means, a latch plate mounted on a shaft, the shaft pivotally mounted through the jaw plates whereby the latch plate will securely capture a pivot pin means when said pin means is inserted in the recesses of the jaw plates.
Claim 3
Dependent Claim
24 words
The tower of claim 1 wherein the latch plate is rigidly fixed to the shaft and said shaft is rotated by an actuating means.
Claim 4
Dependent Claim
53 words
The tower of claim 2 wherein the actuating means comprises an actuating lever rigidly mounted on the shaft and a second extensible power means connected at one end by pin means to the lever, the other end adaptable for mounting to a rigid surface, whereby rotational movement may be imparted to the shaft.
Claim 5
Dependent Claim
27 words
The tower of claim 3 in which the actuating means further comprises a spring means attached to the lever to prevent accidental disengagement of the latch plate.
Claim 6
Dependent Claim
21 words
The tower of claim 4 further comprising an interlock means to prevent simultaneous disengagement of the upper and lower latch plates.
References Cited (Backward Citations)
US2711803A
Cited
US2790622A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-12-17 | 1977-06-18 | 1977-12-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-12-17 | 1981-06-18 | 1981-12-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-12-17 | 1985-06-18 | 1985-12-18 | $7700.00 | Window Closed / Lapsed |