Door latch assembly with rack and pinion actuating members

Details Door latch assembly with rack and pinion actuating members Door latch assembly with rack and pinion actuating members

1989-10-20

1991-10-29

Nicholson, Eric K.

Closure fasteners

Bolts

Sliding

70149, 272DIG27, 272280, E05C 116

Patent

active

050609912

ABSTRACT:
A door latch assembly 10 includes a rack 102 which is moved upon depression of a thumbpiece 12. Movement of the rack 102 results in rotation of an enmeshed pinion 136 and an assembled spindle 152. As the spindle 152 rotates, a latch 26 is moved from a latched position to an unlatched position to thereby permit opening of a door 20 on which the door latch assembly is mounted.
When it is desired to lock the door 20, a key-operated lock cylinder 16 is operated to place into motion facilities for moving the rack 102 into a disabled poisition whereafter depression of the thumbpiece 12 will not result in movement of the rack.
As the rack 102 is moved to the disabled position, teeth 104 of the rack remain enmeshed with teeth 138 of pinion 136. When the rack 102 is again moved to the enabled positon, the teeth 104 and 138 remain enmeshed and thereby avoid any deleterious reactions had they been separated upon disablement of the rack 102 and re-enmeshed upon enablement thereof.

REFERENCES:
patent: 655476 (1990-08-01), Carleton
patent: 656011 (1900-08-01), Carleton
patent: 1102313 (1914-07-01), Yates et al.
patent: 1511956 (1924-10-01), Flagg
patent: 1964066 (1934-06-01), Kuszmaul
patent: 1968285 (1934-07-01), Egan
patent: 2021565 (1935-11-01), Merideth et al.
patent: 2178530 (1939-10-01), Rightmyer
patent: 3561805 (1971-02-01), Shaw
patent: 3933016 (1976-01-01), Nolin
patent: 4052092 (1977-10-01), Bergen
patent: 4384465 (1983-05-01), Muus
patent: 4725085 (1988-02-01), Hu et al.
patent: 4934800 (1990-06-01), Choi

Affiliated with

Also associated with

Rating

Door latch assembly with rack and pinion actuating members does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Door latch assembly with rack and pinion actuating members, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Door latch assembly with rack and pinion actuating members will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1395252