Lever adapter for door knob

Claim 2

An adapter for providing a handle to a round door knob having a supporting shaft comprising, an internally threaded cylinder, a collar on one end said cylinder, said cylinder adapted to pass over said knob until stopped by said collar, said cylinder having a handle extending transversely to the cylinder axis, an externally threaded pressure ring adapted to be screwed into said internally threaded cylinder, said ring also being adapted to be rotated about said supporting shaft and screwed into said internally threaded cylinder after said knob is within said cylinder to cause said cylinder to be frictionally attached to said knob and to have a fixed positive relation to said knob and to allow said knob to be turned by said handle attached to said cylinder.

Claim 3

The adapter of claim 1 wherein said externally threaded pressure ring is split longitudinally to form at least two partial rings, each of said partial rings being provided with means for screwing said partial rings about the shaft into said internally threaded cylinder.

Claim 4

The adapter of claim 2 wherein said partial rings are provided with means to axially align said partial rings to align the threads thereof when said partial rings surround said knob supporting shaft.

Claim 5

The adapter of claim 1 further means attached to said cylinder for counterbalancing the turning torque exerted by the weight of said handle.

Claim 6

The adapter of claim 1 wherein said pressure ring is provided with means at one end of said ring suitable for engagement to a device for applying torque to said ring.

Claim 7

The adapter of claim 1 wherein said ring comprises a pair of externally threaded semi-rings, means for engaging said semi-rings to cause their threads to be aligned to form a continuous thread, an axially directed hole in the end of each insert suitable for engagement with a spandrel wrench.

Claim 8

The adapter of claim 1 wherein said ring comprises a pair of externally threaded semi-rings, said semi-rings being adapted to engage each other to cause the ring assembled by such engagement to have a continuous thread, each said semi-ring being adapted to be engaged by a disengageable lever used for tightening said ring in said cylinder.

Claim 9

The adapter of claim 1 further comprising a gasket material placed on at least one side of said knob to make frictional engagement between said knob and the adapter.

Claim 10

The adapter of claim 8 wherein said gasket material is compressible and has a high coefficient of friction.

Claim 11

The gasket material of claim 9 comprising an elastomer.

Claim 12

The adapter of claim 1 wherein said collar is an externally thread ring adapted to thread into the cylinder.

Claim 13

The adapter of claim 11 wherein said threaded collar extends radially inward and axially inward toward said knob.

Claim 14

The adapter of claim 11 wherein said threaded collar extends radially inward and axially outward from said knob.

Claim 15

An adapter for providing a lever to a round door knob having a supporting neck comprising, a threaded cylinder, a collar on one end of said cylinder, a first frictional material within said cylinder and against said collar, said cylinder adapted to pass over said knob until stopped by said first material, said cylinder having a lever extending transversely to the cylinder axis, a threaded ring, a second frictional material within said cylinder and against said threaded ring, said ring being adapted to be placed around and rotated about said neck, said ring being threadedly engaged to said cylinder, said first and second frictional materials adapted to be compressed against opposite faces of said knob by said ring and said collar to allow said adapter to have a fixed position on said knob and to allow said knob to be turned by said lever attached to said cylinder of said adapter.

Claim 16

An adapter for providing a lever to a round door knob having a supporting neck comprising, a threaded cylinder, a collar on one end of said cylinder, a first frictional material within said cylinder and against said collar, said cylinder adapted to pass over said knob until stopped by said first material, said cylinder having a lever extending transversely to the cylinder axis, a threaded ring, a second frictional material within said cylinder and against said threaded ring, said ring being adapted to be placed around and rotated about said neck, said ring being threadedly engaged to said cylinder, said first and second frictional materials adapted to be compressed against opposite faces of said knob by said ring and said collar to allow said adapter to have a fixed position on said knob and to allow said knob to be turned by said lever attached to said cylinder of said adapter.

Claim 17

An adapter for providing a handle to a door knob having a supporting shaft comprising, a threaded cap, said cap having an end which is smaller than said knob, said cap being adapted to pass over said knob until stopped by said cap end, said cap having a handle extending transversely to the longitudinal axis of said cap, a threaded pressure ring adapted to be screwed to said threaded cap, said ring also being adapted to be rotated about said supporting shaft and screwed to said threaded cap after said knob is within said cap to allow said cap to be frictionally attached to said knob and to have a fixed positive relation to said knob and to allow said knob to be turned by said handle attached to said cap.

Claim 18

An adapter for providing a handle to a door knob having a supporting shaft comprising, a threaded cap, said cap having an end which is smaller than said knob, said cap being adapted to pass over said knob until stopped by said cap end, said cap having a handle extending transversely to the longitudinal axis of said cap, a threaded pressure ring adapted to be screwed to said threaded cap, said ring also being adapted to be rotated about said supporting shaft and screwed to said threaded cap after said knob is within said cap to allow said cap to be frictionally attached to said knob and to have a fixed positive relation to said knob and to allow said knob to be turned by said handle attached to said cap.

Claim 19

The adapter of claim 15 wherein said cap is internally threaded, said pressure ring is externally threaded, and said threaded pressure ring is split longitudinally to form two semicircular rings, each of said semicircular rings being provided with means for screwing said semicircular rings about the shaft into said threaded cap.

Claim 20

The adapter of claim 15 wherein said cap is a hollow cylinder having a collar at one end adapted to make frictional contact with said knob.

Claim 21

An adapter for providing a handle to a door knob having a supporting shaft comprising, a cap, a collar on one end of said cap, said cap adapted to pass over said knob until stopped by said collar, said cap having a handle extending transversely to the axis of said cap, a pressure ring adapted to pass over and around said supporting shaft, means for securing said ring to said cap after said cap is over said knob and said ring is around said shaft, means for supplying force upon said ring in said axial direction along the direction of said supporting shaft after said knob is within said cap, said cap being adapted to be frictionally attached to said knob by the axial force between said ring and said collar producing said frictional attachment.

Claim 22

An adapter for providing a handle to a door knob having a supporting shaft comprising, a cap, a collar on one end of said cap, said cap adapted to pass over said knob until stopped by said collar, said cap having a handle extending transversely to the axis of said cap, a pressure ring adapted to pass over and around said supporting shaft, means for securing said ring to said cap after said cap is over said knob and said ring is around said shaft, means for supplying force upon said ring in said axial direction along the direction of said supporting shaft after said knob is within said cap, said cap being adapted to be frictionally attached to said knob by the axial force between said ring and said collar producing said frictional attachment.