Self actuated mechanism for braking a driven member upon discontinuation of drive thereto

Claim 2

The invention as recited in claim 2 wherein said braking surfaces are in the form of cone brakes.

Claim 3

The invention as recited in claim 3 wherein said shifting means comprises interthreaded threads on said torque transmitting means and said torque transfer means to produce counter axial displacement of said torque transmitting and torque transfer means to effect a driving of said torque transfer means by axial displacement of the torque transmitting means in one direction and a braking of said torque transfer means through axial displacement of the torque transmitting means in the other direction such that said braking surfaces engage.

Claim 4

The Invention as recited in claim 4 wherein drag means is operative against the torque transmitting means to load the same to initially induce said axial displacement thereof to effect engagement of said braking surfaces.

Claim 5

In an agricultural implement of the type having a housing mounting a rotor driven from an associated source, the improvement comprising: a drive-brake mechanism comprising: a sleeve mounted on said housing and having a braking surface thereon; a shaft journalled through said sleeve and comprising a spiral land; a rotor mounted on the shaft; an input member rotatably drivable by said source, said member having a spirally grooved bore threaded on the land wherein reverse relative rotary motions between said input member and said shaft effect corresponding axial displacements of said input member on said shaft, and said input member including a braking surface disposed adjacent said braking surface of said sleeve for engagement therewith when the rotor overruns the driving source.

Claim 6

The invention as recited in claim 6 wherein said drive-brake mechanism includes drag means operative to hold said input member against entrainment by said rotor when said shaft is in driving relation to said input member.

Claim 7

The invention as reciteD in claim 7 wherein said input member comprises an annular drag surface, and said drag means comprises stationary sphincteral spring means anchored to the sleeve and wrapped about said surface to provide a torque load thereon.

Claim 8

For a cutter including a casing, a drive-brake mechanism automatically shiftable within a range between drive and brake positions in response to the direction from which driving torque is delivered thereto comprising; a. three coaxially arranged bodies including; b. a first body connected to a source of driving torque; first c. a second body coupled by coupling means at one extreme of said range to said first body and functioning as a guide axis therefor, said second body provided with output means; d. a third body held against rotary entrainment by said casing said second body supported by said third body and said first and third bodies provided with confronting braking surfaces, said confronting braking surfaces arranged to engage at the other extremity of said range; e. and means for relatively shifting said first and third bodies axially to engaged position of the braking surface to stop rotation of said first and second bodies upon discontinuance of delivery of driving torque to said first body, and to disengaged position of the braking surfaces to effect drive from the first to the second body in consequence of driving torque being delivered to the first body.

Claim 9

The invention according to claim 9 and said first body comprising a rotary member, said second body comprises a shaft and the third body comprises a sleeve providing a journal for the shaft.

Claim 10

The invention as set forth in claim 1 wherein said coupling means comprise lugs extending axially from both said torque transfer means and said torque transmitting means, said lugs having axially aligned confronting surfaces that engage to transmit rotary motion from said torque transfer means to said torque transmitting means.

Claim 11

The invention as set forth in claim 6, wherein there are coupling means between said input members and said shaft, said coupling means comprise lugs extending axially from both said input member and said shaft, said lugs having axially aligned confronting surfaces that engage to transmit rotary motion from said input member to said shaft.

Claim 12

The invention as set forth in claim 9 wherein said coupling means comprise lugs extending axially from both said first and second bodies, said lugs having axially aligned confronting surfaces that engage to transmit rotary motion from said first body to said second body.