Machine element or mechanism – Gearing – Directly cooperating gears
Patent
1990-01-08
1992-04-07
Herrmann, Allan D.
Machine element or mechanism
Gearing
Directly cooperating gears
744248R, 74 8915, 604155, 128DIG1, F16H 2920, F16H 2702, A61M 500
Patent
active
051016796
ABSTRACT:
A half-nut block containing a threaded bore and a larger, overlapping, unthreaded bore is engaged with a lead screw. The larger bore overlaps the threaded bore so that effectively a half-nut results. The half-nut comprises a face having an acute angle in relation to the lead screw and this angled face contacts the inside of a bearing block within which the half-nut is mounted. The bearing block is slidably mounted on a C-tube which is mounted around and extends along a predetermined length of the lead screw. Also mounted on the C-tube is an arm for transmitting the linear motion of the bearing block to a remote point such as the plunger of a syringe. The arm is coupled to the bearing block at points selected so that transmission to the arm of any wobbling of the bearing block is reduced. The arm includes a lever which engages a cam formed on the half-nut to force the half nut to disengage from the lead screw when the arm is to be moved to a new location on the lead screw. A spring bias is coupled to the half-nut block opposite the cam for urging the half-nut block back into contact with the lead screw after disengagement. A stop mechanism prevents undesired disengagement of the half-nut block from the lead screw when force is applied other than by the cam block.
REFERENCES:
patent: 3235220 (1966-02-01), Rantsh et al.
patent: 3757591 (1973-09-01), Taylor
patent: 3842690 (1974-10-01), Gulick
patent: 3858581 (1975-01-01), Kamen
patent: 3886938 (1975-06-01), Szabo et al.
patent: 4023431 (1977-05-01), Pavlas
patent: 4125049 (1978-11-01), Price, Jr.
patent: 4424720 (1984-01-01), Bucchianeri
patent: 4435173 (1984-03-01), Siposs et al.
patent: 4465474 (1984-08-01), Mardorf et al.
patent: 4479398 (1984-10-01), Watanabe
patent: 4804368 (1989-02-01), Skakoon et al.
patent: 4932279 (1990-06-01), Kasuga
Boyd Robert R.
Smith Eugene P.
Herrmann Allan D.
IVAC Corporation
Krolikowski Julie
LandOfFree
Screw drive engagement/disengagement and decoupling mechanism does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Screw drive engagement/disengagement and decoupling mechanism, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Screw drive engagement/disengagement and decoupling mechanism will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1887477