Plunger stopped bi-directional no-back assembly

Claim 2

Apparatus comprising: a support member; a rotatable output member rotatably mounted by said support member; a rotatable drive member for rotating said rotatable output member in either direction; means for releasably locking said output member to said support member and releasably preventing the rotation of said output member when said output member is not being driven by said drive member in either direction including: detent means on one of said support and output members, and detent receiving means, mounted on the other of said support and output members for movement relative thereto, for removably receiving said detent means, and means for yieldably urging said detent means and said detent receiving means into engagement to lock said output member to said support member and prevent the rotation of said output member; whereby said output member has substantially instantaneously prevented from rotating after limited relative rotary movement of said output member and said locking means when said output member is not being driven by the input member in either direction; and releasing means cooperating with said drive member for relatively moving said detent means and said detent receiving means to overcome said yieldable means to release said locking means and automatically unlock said output member from said support member when said drive member is rotated in either direction.

Claim 3

Apparatus as set forth in claim 1 wherein said detent means is mounted on said support member; and said braking means includes a braking plate movably mounted on said output member, said detent receiving means comprising a plurality of recesses about the outer periphery of said braking plate to releasably receive said detent means.

Claim 4

Apparatus as set forth in claim 2 wherein said releasing means comprises a plurality of perimetrically spaced cam means for moving said detent means out of one of said recesses when said drive member is rotated.

Claim 5

Apparatus as set forth in claim 2 wherein said braking plate is coupled to said output member with a lost motion connection so as to be movable therewith after limited relative angular displacement of the output member and braking plate.

Claim 6

Apparatus as set forth in claim 4 wherein said drive member is coupled to said output member with a lost motion connection so as to drive said output member after limited relative angular displacement between the drive member and output member.

Claim 7

Apparatus as set forth in claim 1 wherein said releasing means comprises means on said drive member being displaceable relative to said brake means when said drive member is rotated to release said braking means.

Claim 8

Apparatus as set forth in claim 6 wherein said drive member is connected to said output member with a lost motion connection.

Claim 9

Apparatus comprising: a rotatable output member; a rotatable input member for driving the output member; lock means including a part with a hub portion mounted on said output member with a rotary lost motion driving connection and a cooperating portion movable from a locked position for preventing rotation of said output member in cooperation with said part to a non-locking Position, after relative angular displacement of said brake means and said output member in a first direction, said cooperating portion being returnable to said locking position after relative angular displacement of said lock means and said output member in an opposite direction; whereby said output member is substantially instantaneously locked after limited rotary movement of said output member and said lock means in said opposite direction; said output member and said part being relatively angularly displaced in said first direction in response to rotation of said output member by said input member; and means responsive to rotation of the input member in either direction for moving said lock means from locking position.

Claim 10

Apparatus comprising: a rotatable output member; a rotatable input member for driving the output member; lock means including a part with a hub portion mounted on said output member with a rotary lost motion driving connection and a cooperating portion movable from a locked position for preventing rotation of said output member in cooperation with said part to a non-locking Position, after relative angular displacement of said brake means and said output member in a first direction, said cooperating portion being returnable to said locking position after relative angular displacement of said lock means and said output member in an opposite direction; whereby said output member is substantially instantaneously locked after limited rotary movement of said output member and said lock means in said opposite direction; said output member and said part being relatively angularly displaced in said first direction in response to rotation of said output member by said input member; and means responsive to rotation of the input member in either direction for moving said lock means from locking position.

Claim 11

Apparatus as set forth in claim 8 wherein said rotatable input member is connected to said output member with a lost motion connection to permit relative movement of said input member and said brake means.

Claim 12

In combination: screw means cooperating with nut means for translating rotary motion into linear motion when one of said screw means and nut means is rotated to linearly move a load exerting a thrust force on the other of said screw means and nut means; rotatable drive means connected to said one means with a rotary lost motion driving connection for rotating said one means in either direction; lock means including a part with a hub portion mounted on said one means with a lost motion connection and having a cooperating portion movable between a locking position for preventing, in cooperation with said part, rotation of said one means and a non-locking position after relative angular displacement between said lock means and said one means in a first direction, said cooperating portion being returnable to said locking position after relative rotary displacement of said one means and lock means in an opposite direction; whereby said one means is substantially instantaneously locked after limited relative rotation of said one means and said locked means in said opposite direction; and means responsive to rotation of the input member in either direction for moving said lock means from said locking position to said non-locking position, said one means and said lock means being relatively angularly displaced in a first direction in response to rotation of said drive means and relatively angularly displaced in said second direction in response to a rotation of said one means by said other means resulting from the thrust force exerted by said load on said other means.

Claim 13

In combination: screw means cooperating with nut means for translating rotary motion into linear motion when one of said screw means and nut means is rotated to linearly move a load exerting a thrust force on the other of said screw means and nut means; rotatable drive means connected to said one means with a rotary lost motion driving connection for rotating said one means in either direction; lock means including a part with a hub portion mounted on said one means with a lost motion connection and having a cooperating portion movable between a locking position for preventing, in cooperation with said part, rotation of said one means and a non-locking position after relative angular displacement between said lock means and said one means in a first direction, said cooperating portion being returnable to said locking position after relative rotary displacement of said one means and lock means in an opposite direction; whereby said one means is substantially instantaneously locked after limited relative rotation of said one means and said locked means in said opposite direction; and means responsive to rotation of the input member in either direction for moving said lock means from said locking position to said non-locking position, said one means and said lock means being relatively angularly displaced in a first direction in response to rotation of said drive means and relatively angularly displaced in said second direction in response to a rotation of said one means by said other means resulting from the thrust force exerted by said load on said other means.

Claim 14

The combination as set forth in claim 10 including a housing means; said lock means comprising: recess means on said part, detent means comprising said cooperating portion on said housing means, and biasing means for constantly, yieldably urging said detent means toward said recess means to a locking position to prevent rotation of said one means; said detent means being movable to a non-locking position to permit said one means to be freely driven by said drive means. said means for moving said lock means including means on said drive means for moving said detent means against the force of said biasing means from said locking position to said non-locking position when said drive means drives said one means relative to said lock means in said first direction and to permit said detent means to return from said non-locking position to said locking position when said lock means and said one means are relatively rotated in said opposite direction.

Claim 15

The combination as set forth in claim 11 wherein said lock means includes a braking plate mounted on said one means, said recess means comprises a plurality of radially outwardly facing recesses perimetrally spaced about said braking plate, said detent means being radially movably mounted on said housing, said means for moving said detent means comprising a plurality of perimetrally spaced cam means on said drive means for moving the detent means out of one of said recesSes when said drive means drives said one means.

Claim 16

The combination as set forth in claim 12 wherein said plurality of cam means comprises an annular portion forming a plurality of circumferentially interposed raised and recessed portions, each of said raised portions extending perimetrically, the width of one of said recesses.

Claim 17

The combination as set forth in claim 11 wherein said lost motion connection between said one means and said brake means includes an axially extending drive lug on said one means and cooperating drive lug receiving means on said lock means, said drive lug and drive lug receiving means being relatively circumferentially movable to permit relative movement of said one means and said screw means when said detent means moves from said non-braking position to said braking position and said screw means is rotated in said opposite direction.

Claim 18

The combination as set forth in claim 11 wherein said one means is said screw means including a screw shaft mounting a sleeve including circumferentially spaced, axially extending drive lugs; said lock means comprising a disc mounted on said shaft for limited rotation relative thereto and having apertures therein receiving said drive lugs to form said lost motion connection to permit limited relative rotation of said sleeve and said disc, said recess means comprising a plurality of circumferentially spaced apart notches about the periphery of said disc for receiving said detent means.

Claim 19

The combination as set forth in claim 15 wherein said detent means comprises a radially movable plunger mounted on said housing, said biasing means biasing said plunger radially inwardly to be received by one of said notches; said means for moving said lock means including an undulating rim portion on said drive means engageable with said plunger to move said plunger radially outwardly when said drive means rotates said screw shaft, and said lost motion connection between said drive means and said screw shaft comprises apertures in said drive means receiving said drive lugs and permitting movement of said drive lugs relative to said recesses in said drive means.

Claim 20

Apparatus comprising: a rotatable output member; a rotatable input member connected to said output member with a lost motion connection for driving said output member in either direction; lock means including a part with a hub portion rotatably mounted on said output member with a lost motion connection and having a cooperating portion movable from a locking position for preventing, in cooperation with said part, rotation of said output member to a non-locking position, in response to relative angular displacement of said lock means and said input member in a first direction, said second portion being returnable to said locking position in response to relative angular displacement of said lock means and said input member in an opposite direction; whereby said output member is substantially instantaneously locked after limited rotary movement of said output member and said lock means in said opposite direction; said input member and said lock means being relatively angularly displaced in said first direction in response to rotation of said output member by said input member.

Claim 21

Apparatus comprising: a rotatable output member; a rotatable input member connected to said output member with a lost motion connection for driving said output member in either direction; lock means including a part with a hub portion rotatably mounted on said output member with a lost motion connection and having a cooperating portion movable from a locking position for preventing, in cooperation with said part, rotation of said output member to a non-locking position, in response to relative angular displacement of said lock means and said input member in a first direction, said second portion being returnable to said locking position in response to relative angular displacement of said lock means and said input member in an opposite direction; whereby said output member is substantially instantaneously locked after limited rotary movement of said output member and said lock means in said opposite direction; said input member and said lock means being relatively angularly displaced in said first direction in response to rotation of said output member by said input member.