F - Mech Eng,Light,Heat,Weapons – 16 – D
Patent
F - Mech Eng,Light,Heat,Weapons
16
D
192/4, 56/48
F16D 67/02 (2006.01)
Patent
CA 1166176
brake spring 53 and disengages the brake shoe 42 from the brake band 43. After the brake shoe and brake band are dis- engaged, frictional contact between the contact surface 31 and 41 causes the housing 36 to be rotated substantially at the speed of rotation of the drive shaft 14. If the cutter blade or other rotating element 46 strikes a solid object such as a rock or the like, relative sliding movement may oc- cur between the contact surfaces 31 and 41 to reduce or pre- vent damage to either the rotating element or the drive con- nection. Also, if the cutter blades of a lawnmower should encounter a clump or thick or tall grass which normally would stall an internal combustion power plant, the power plant of the present invention will slow down and immediately the re- turn spring 33 will retract the weights 25 and disengage the contact surfaces 31 and 41. When this occurs, the brake spring 53 urges the housing upwardly so that the brake shoe 42 engages the brake band and interrupts rotation of the housing. Since the power plant is thus relieved of its load, it is free to retain its operating speed at which time it will again operate the cutter blade. When the speed of rotation of the power plant 11 is intentionally reduced, such as for emptying a grass cat- cher bag or the like, rotation of the cutter blade is inter- rupted so that such cutter blade does not present a hazard to the operator if he should inadvertently insert his hand or foot under the deck 12. The embodiment of the invention in which an exclu- sive property or privilege is claimed are defined as follows: - 12 -
417767
Cody John F.
Cody John M.
Weaks William L.
Cody John F.
Cody John M.
Fetherstonhaugh & Co.
Weaks William L.
LandOfFree
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