Implements or apparatus for applying pushing or pulling force – Miscellaneous
Reexamination Certificate
2007-05-08
2007-05-08
Watson, Robert C. (Department: 3723)
Implements or apparatus for applying pushing or pulling force
Miscellaneous
C254S08900R, C254S097000
Reexamination Certificate
active
10880563
ABSTRACT:
The linear actuator comprises an elongated first band wound in helical form about a central axis and capable of taking a retracted position and an extended position with its turns spaced from one another in the direction of the central axis, and first fasteners carried by the first band and longitudinally disposed therealong. The linear actuator also comprises an elongated second substantially flat band wound on itself, with its turns substantially transversely parallel to the central axis, and capable of taking a retracted, spiral position with its turns nested within one another and an extended position with its turns forming a helix around the central axis and generally equally radially spaced therefrom to form a telescopic column, the first and second bands, when in retracted position, in respective locations so as to clear each other. Second fasteners are carried by the second band and longitudinally disposed therealong, the second fasteners capable of cooperating with the first fasteners to releasably interlock the first and second bands. A spacer successively spaces the turns of the first band. A powered drive causes relative rotation on one hand of the first and second bands and on the other hand of the spacer about the central axis. Guide means guide the turns of the second band towards the turns of the first band to releasably interlock the first and second fasteners. A retaining member retains the first and second fasteners in interlocked fashion in the telescopic column.
REFERENCES:
patent: 1570429 (1926-01-01), Bonnet
patent: 2130993 (1938-09-01), Dubilier
patent: 2173685 (1939-09-01), Grassmann et al.
patent: 2265892 (1941-12-01), Bloch
patent: 2269363 (1942-01-01), Farrand
patent: 2574657 (1951-11-01), Pierce
patent: 2946556 (1960-07-01), Edgerton
patent: 3016988 (1962-01-01), Browing
patent: 3503164 (1970-03-01), Berry et al.
patent: 4875660 (1989-10-01), Gagnon et al.
patent: 5005436 (1991-04-01), Brusasco
patent: 5056278 (1991-10-01), Atsukawa
patent: 5249396 (1993-10-01), Zuse
patent: 6112474 (2000-09-01), Paine
patent: 6224037 (2001-05-01), Novick
patent: 6428419 (2002-08-01), Sheldon
patent: 391718 (1932-03-01), None
patent: 241789 (1911-12-01), None
patent: 1225839 (1911-12-01), None
patent: 547836 (1966-09-01), None
patent: 1331910 (1973-09-01), None
Gestion Laforest Inc.
Martineau Louis
Watson Robert C.
LandOfFree
Linear actuator with releasably interlocking bands does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Linear actuator with releasably interlocking bands, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Linear actuator with releasably interlocking bands will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3798598