Safety lock for elevators

Details Safety lock for elevators Safety lock for elevators

2005-07-19

2008-10-14

Gay, Jennifer H (Department: 3676)

Wells

Above ground apparatus

With means facilitating connecting or disconnecting...

C166S379000, C294S090000, C294S102200

Reexamination Certificate

active

07434614

ABSTRACT:
An elevator having a safety lock is provided to prevent the inadvertent release of a tubular. In one embodiment, the elevator includes a body for supporting the tubular and a locking apparatus activatable by an upset portion of the tubular, the safety locking apparatus adapted to prevent the tubular handling apparatus from releasing the tubular when activated. In another embodiment, the elevator is provided with a secondary override locking device for the safety lock so that jarring operations may be performed using the elevator.

REFERENCES:
patent: 1511699 (1924-10-01), Wilcox
patent: 1599144 (1926-09-01), Paulsen
patent: 1725459 (1929-08-01), Krell et al.
patent: 1737369 (1929-11-01), Gidley
patent: 1814407 (1931-07-01), Peebles
patent: 2109493 (1938-03-01), Lundeen
patent: 2722450 (1955-11-01), Nelson
patent: 3140523 (1964-07-01), Taylor, Jr.
patent: 3358341 (1967-12-01), Burstall
patent: 4361940 (1982-12-01), McFadden
patent: 4396216 (1983-08-01), Hamilton
patent: 5340182 (1994-08-01), Busink et al.
patent: 5755289 (1998-05-01), Angman et al.
patent: 6073699 (2000-06-01), Hollingsworth, Jr.
patent: 6494273 (2002-12-01), Martin
U.K. Search Report, Application No. GB0514806.9, dated Aug. 11, 2005.

Affiliated with

Also associated with

Rating

Safety lock for elevators does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Safety lock for elevators, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Safety lock for elevators will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-4016391