US3751099A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hydraulic actuators for orienting implements on cranes
Assignee: Billings R O
•
Filing: 1971-10-07
•
Granted: 1973-08-07
•
Expires: 1991-10-07
Abstract
Abstract A pressure plate which is adjustably supported on the end of the dipper stick has a depending non-rotatable shaft around which a circular hydraulic actuator is rotatably mounted, there being provision for removably supporting an implement for rotation around the shaft, together with means for detachably connecting the implement to the actuator so that the latter operates the implement in swiveling movement, hydraulic conduits for the actuator and implement being disposed within the non-rotatable shaft.
Inventors
- 👤 R Billings
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 12:20
CPC Classifications
B; B66; B66C; B66C3/00; B66C3/14; B66C3/16; E; E02; E02F; E02F3/00; E02F3/04; E02F3/28; E02F3/36; E02F3/3604; E02F3/3677; E02F3/3681; E02F3/40; E02F3/413; E02F3/4135; E02F3/4136
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
134 words
In combination, a non-rotatable swivel shaft; an actuator having a casing mounted for rotation around said swivel shaft; a hook assembly having a deck with a central opening through which the swivel shaft extends; retainer means on the swivel shaft below the deck supporting the deck for swiveling movement around the swivel shaft; a drive connection between said actuator and said deck; operating means for the actuator; laterally-spaced arcuate guide rods depending from the deck on opposite sides of the retainer means, each guide rod having widely-spaced ends with one end secured to the deck on one side of the axis of the swivel shaft and with its other end secured to the deck on the other side of the axis of the swivel shaft; and a hook slideably suspended from each guide rod.
Claim 2
Dependent Claim
134 words
In combination, a non-rotatable swivel shaft; an actuator having a casing mounted for rotation around said swivel shaft; a hook assembly having a deck with a central opening through which the swivel shaft extends; retainer means on the swivel shaft below the deck supporting the deck for swiveling movement around the swivel shaft; a drive connection between said actuator and said deck; operating means for the actuator; laterally-spaced arcuate guide rods depending from the deck on opposite sides of the retainer means, each guide rod having widely-spaced ends with one end secured to the deck on one side of the axis of the swivel shaft and with its other end secured to the deck on the other side of the axis of the swivel shaft; and a hook slideably suspended from each guide rod.
Claim 3
Dependent Claim
18 words
A combination as set forth in claim 1 in which each arcuate guide rod is a half ring.
Claim 4
Dependent Claim
38 words
A combination as set forth in claim 2 in Which the retainer means for supporting the deck is a nut threaded on the swivel shaft and comprising laterally-separable sections whereby the nut may be removed by lateral withdrawal.
Claim 5
Dependent Claim
39 words
A combination as set forth in claim 3 in which the arcuate guide rods are of such extent with respect to the size of the retainer nut that the latter may be withdrawn laterally through an arcuate guide rod.
Claim 6
Dependent Claim
66 words
A combination as set forth in claim 1 in which the retainer means on the swivel shaft is readily removable by lateral withdrawal to permit removal of the hook assembly from the swivel shaft, and in which the drive connection between the actuator and deck comprises male and female elements which are disengageable in response to said removal of the hook assembly from the swivel shaft.
Claim 7
Dependent Claim
51 words
A combination as set forth in claim 1 in which the deck has oppositely-disposed depending sides positioned at right angles to the arcuate guide rods, and in which there is a sleeve supported by and between said depending sides in a position to receive a lower portion of the swivel shaft.
Claim 8
Dependent Claim
84 words
A combination as set forth in claim 6 in which there are hydraulic conduits extending longitudinally of the swivel shaft and having outlet branches which communicate with the periphery of the swivel shaft within the sleeve, said sleeve having circular fluid conduits in registration with said branches in any position of rotatable movement of the deck and sleeve, and there being flexible conduits leading from said circular conduits of the sleeve whereby hydraulic fluid may be fed to an implement supported on the hooks.
Claim 9
Dependent Claim
33 words
A combination as set forth in claim 7 in which the actuator is hydraulically operated and in which there are hydraulic connections between the actuator and the hydraulic conduits in the swivel shaft.
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) | 1976-08-06 | 1977-02-05 | 1977-08-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-08-06 | 1981-02-05 | 1981-08-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-08-06 | 1985-02-05 | 1985-08-07 | $7700.00 | Window Closed / Lapsed |