Implements or apparatus for applying pushing or pulling force – Apparatus for hauling or hoisting load – including driven... – Device includes rotatably driven – cable contacting drum
Reexamination Certificate
2006-06-16
2009-08-18
Marcelo, Emmanuel M (Department: 3654)
Implements or apparatus for applying pushing or pulling force
Apparatus for hauling or hoisting load, including driven...
Device includes rotatably driven, cable contacting drum
C254S358000, C254S365000
Reexamination Certificate
active
07575222
ABSTRACT:
A drawworks for drilling rigs having an improved dual brake system that divides the drill line load equally between the dual brakes, a more efficient braking action is realized by the provision of radial guide rollers positioned to urge the brake bands into concentric relation respective the brake drums which maximizes contact therebetween and results in more sensitive control of weight on bit. A chain and sprocket drive line includes flingers immersed in lub oil which effectively distributes lub oil throughout the drive line.
REFERENCES:
patent: 1688599 (1928-10-01), Sage et al.
patent: 3101828 (1963-08-01), Wilson
patent: 3964692 (1976-06-01), Pendleton
patent: 4552340 (1985-11-01), Sheppard
patent: 4588167 (1986-05-01), Finzel
patent: 4751969 (1988-06-01), Klaeger
patent: 5425435 (1995-06-01), Gregory
patent: 5609229 (1997-03-01), Sell
patent: 5671912 (1997-09-01), Langford et al.
Bates Marcus L.
Marcelo Emmanuel M
LandOfFree
Drawworks for drilling rigs does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Drawworks for drilling rigs, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Drawworks for drilling rigs will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-4139138