Split housing transmission

• US 5,918,503 A
• Filed: 02/15/1997
• Issued: 07/06/1999
• Est. Priority Date: 02/15/1997
• Status: Expired due to Term

• Current Assignee: Paul D. Cavanagh
• Original Assignee: Paul D. Cavanagh
• Inventors: Cavanagh, Paul D.
• Primary Examiner(s): HERRMANN, ALLAN D
• Application Number:
  US08/801,933
• Time in Patent Office: 871 Days
• Field of Search: 74/15.69, 74/484 R, 416/170 R
• US Class Current: 74/15.69
• CPC Class Codes: B63H 23/00 Transmitting power from propulsion power plant to propulsive elements adaptation of transmission to allow adjustment in direction of propellers B63H5/125; transmission between wind motors and propulsive elements B63H13/00; in outboard propulsion units B63H20/14; adaptation of transmission to allow adjustment of location of propellers B63H20/08
• CPC Class Codes: B63H 23/34 Propeller shafts; Paddle-wheel shafts; Attachment of propellers on shafts
• CPC Class Codes: F16H 57/025 Support of gearboxes, e.g. torque arms, or attachment to other devices

Abstract

The present invention comprises a transmission for the distribution of power from a rotating shaft, which shaft is supported between a pair of housing segments, which housing segments are connectedly joined to one another, including a rotatable shaft having a power source at one end thereof, for rotation of the shaft; a first housing enclosing at least a portion of the rotatable shaft, the housing having a first end with a plurality of spaced apart longitudinally directed holes therein; a flange having at least one radially directed projection thereon, the projection having a cammed surface which sweeps across the holes on the first end of the first housing; a second housing having a first end with a plurality of circumferentially spaced apart longitudinally directed holes therein; a plurality of reciprocally moveable pins disposed within the holes in the first and the second housing; and a cam arranged within the second housing, so as to effectuate longitudinal movement of the pins within the second housing to return their engagement with the holes in the first housing, thus locking the housing portions into non-rotative engagement with one another as the radially projecting cam sweeps past each pin.

Claims

1. A transmission for the distribution of power from a rotating shaft, which shaft is supported between a pair of housing segments, which housing segments are connectedly joined to one another, comprising:

a rotatable shaft having a power source at one end thereof, for rotation of said shaft;

a first housing enclosing at least a portion of said rotatable shaft, said housing having a first end with a plurality of spaced apart longitudinally directed holes therein;

a flange having at least one radially directed projection thereon, said projection having a cammed surface thereon, and which radial projection sweeps across said holes on said first end of said first housing;

a second housing having a first end with a plurality of circumferentially spaced apart longitudinally directed holes therein;

a plurality of reciprocally moveable pins disposed within said holes in said first and said second housing; and

a cam arranged within said second housing, so as to effectuate longitudinal movement of said pins within said second housing to return their engagement with said holes in said first housing, thus locking said housings into non-rotative engagement with one another as said radial projection sweeps past said pin.

2. A transmission for the deployment of power from a rotating shaft, comprising;

a first housing disposed around one end of said rotatable shaft;

a second housing disposed around a further portion of said rotatable shaft;

an arrangement of correspondingly aligned longitudinally directed holes in each adjacent end of said first and second housings;

a plurality of reciprocally moveable pins arranged in said holes;

a first and second arrangement of cam members, arranged to cammably move said pins into and out of connective engagement between said first and second housings; and

a power takeoff member arranged in contact with said first cam member arrangement, so as to transfer rotary power between said rotatable shaft and said cam members.

3. The transmission apparatus as recited in claim 2, where said first and second cam member arrangements are attached to said rotatable shaft.

4. The transmission apparatus as recited in claim 3, wherein said first and second cam members are longitudinally spaced apart from one another, and are angularly out of phase with one another.

5. The transmission apparatus as recited in claim 2, wherein said first and second cam members are secured to said shaft.

6. The transmission apparatus as recited in claim 2, wherein said pins have a sloped surface on each end thereof, to permit engagement with said cam member arrangements, as they rotate into engagement therewith.

7. The transmission apparatus as recited in claim 2, wherein said pins have a cap on one end thereof, said cap having a side surface which is shaped to slidingly engage an inner wall portion of its respective housing, to prevent rotation of said pin about its own longitudinal axis.

8. The transmission apparatus as recited in claim 2, wherein said power takeoff member comprises an arrangement of propeller blades.

9. A method of transferring power to and from a rotatable shaft supported within split housing transmission while maintaining portions of said split housing in an engaged non-rotatable relationship, comprising the steps of:

supporting a rotatable shaft within a first housing portion and a second housing portion, said housings being separated by a circumferential gap spaced therebetween;

connecting a radially outwardly projecting cam from said shaft so as to extend outwardly through said gap;

arranging a plurality of pins in a longitudinally displaceable manner between a corresponding plurality of holes in adjacent ends of said housing portions, said pins having one end contactable by said projecting cam;

connecting an annular cam member to said shaft near the other end of said pins; and

rotating said shaft to cause said finger cam and said annular cam to sequentially displace and re-emplace only a portion of said pins with respect to said holes in one of said housing portions.

10. The method of claim 9, including the step of:

separating said projecting cam and said annular cam member by an angular separation.

11. The method of claim 10, including the step of:

transferring power with respect to said shaft, by a power transfer member secured to said projecting cam.

12. The method as recited in claim 9, including the step of:

attaching a propeller arrangement radially outwardly of said projecting cam to transfer power from said rotable shaft between said housings outwardly therefrom.