Variable diameter split-flange pulley

Claim 2

An adjustable pulley having a variable effective diameter drivingly engaging a V-belt at the effective diameter comprising in combination; a shaft, a fixed pulley flange and integral hub positioned upon and secured to said shaft for rotation therewith, a reciprocable pulley flange and integral hub coaxially positioned upon said fixed pulley flange hub for axial reciprocable movement relative to said fixed hub, said fixed and reciprocable hubs both having aligned portions drivingly connecting said fixed and reciprocable pulley flanges, a Belleville spring, means on said fixed hub supporting the internal circumferential surface of said spring, and means on said reciprocable hub engaging a portion of the outer circumferential surface of said spring retaining said spring in engagement with said fixed hub supporting means whereby said adjustable pulley is secured in assembled relationship, said spring continuously biasing said reciprocable pulley flange relative to said fixed pulley flange into engagement with said Vbelt.

Claim 3

An adjustable pulley having a variable effective diameter drivingly engaging a V-belt at the effective diameter comprising in combination; a shaft, a fixed pulley flange and integral hub coaxially positioned upon said shaft, said shaft and said fixed hub both having aligned splined portions drivingly connecting said fixed hub to said shaft for rotation therewith, a reciprocable pulley flange and integral hub coaxially positioned upon said fixed hub for axial reciprocal movement relative to said fixed pulley flange and hub, said fixed and reciprocable hubs both having aligned splined portions drivingly connecting said fixed and reciprocable flanges for rotation in unison, a Belleville spring, said spring having a plurality of equiangularly spaced assembly notches in the inner circumferential surface of said spring, a plurality of projections formed equiangularly around said fixed hub in a predetermined location in alignment with the notches in said spring, said spring being mounted upon said fixed hub and said notches engaging said projections when assembled and said spring being rotated moving said notches out of alignment with said notches maintaining the spring in a fixed position relative to said fixed hub, a radially extending flange on said reciprocable hub, and means on said radially extending flange fixedly engaging a portion of the outer circumferential surface of said spring locking said spring in place whereby said spring continuously biases said reciprocable flange toward said fixed flange into engagement with the V-belt, said means fixedly engaging the outer circumferential surface of said spring also being effective to retain the adjustable pulley in assembled relationship.

Claim 4

An adjustable pulley having a variable effective diameter drivingly engaging a V-belt at the effective diameter comprising in combination; a shaft, a fixed pulley flange and integral hub coaxially positioned upon said shaft, said shaft and said fixed hub both having aligned splined portions drivingly connecting said fixed hub to said shaft for rotation therewith, a reciprocable pulley flange and integral hub coaxially positioned upon said fixed hub for axial reciprocal movement relative to said fixed pulley flange and hub, said fixed and reciprocable hubs both having aligned splined portions drivingly connecting said fixed and reciprocable flanges for rotation in unison, a Belleville spring, said spring having a plurality of equiangularly spaced assembly notches in the inner circumferential surface of said spring, a plurality of projections formed equiangularly around said fixed hub in a predetermined location in alignment with the notches in said spring, said spring being mounted upon said fixed hub and said notches engaging said projections when assembled and said spring being rotated moving said notches out of alignment with said notches maintaining the spring in a fixed position relative to said fixed hub, a radially extending flange on said reciprocable hub, and means on said radially extending flange fixedly engaging a portion of the outer circumferential surface of said spring locking said spring in place whereby said spring continuously biases said reciprocable flange toward said fixed flange into engagement with the V-belt, said means fixedly engaging the outer circumferential surface of said spring also being effective to retain the adjustable pulley in assembled relationship.

Claim 5

An adjustable pulley of stamped sheet metal construction having a variable effective diameter drivingly engaging a V-belt at the effective diameter comprisIng in combination; a shaft, a fixed pulley flange and integral hub of stamped sheet metal construction positioned upon said shaft, a splined portion on said shaft, a splined portion on said fixed hub in mating engagement with said shaft spline providing a driving connection therebetween, a reciprocable pulley flange and integral hub of stamped sheet metal construction coaxially positioned upon said fixed hub for axial reciprocable movement relative to said fixed hub, said fixed and reciprocable hubs each having a splined portion in mating engagement drivingly connecting said fixed and reciprocable flanges, a Belleville spring, said stamped sheet metal fixed hub having three equiangularly spaced projections extending radially outwardly therefrom, said spring having three equiangularly spaced notches in the internal circumferential surface of said spring, said spring being coaxially positioned upon said fixed hub with said notches receiving the three equiangularly spaced projections on said fixed hub permitting assembly of said spring thereon, a radially extending flange on said stamped sheet metal reciprocable hub, a locking tang struck from the outer periphery of said radially extending flange, and said Belleville spring containing a locking notch receiving said tang when said spring is rotated moving said notches out of alignment with said projections thereby locking said Belleville spring in place and retaining said adjustable pulley in assembled relationship while said Belleville spring is effective to continuously urge said reciprocable flange into engagement with said V-belt.

Claim 6

An adjustable pulley of stamped sheet metal construction having a variable effective diameter drivingly engaging a V-belt at the effective diameter comprisIng in combination; a shaft, a fixed pulley flange and integral hub of stamped sheet metal construction positioned upon said shaft, a splined portion on said shaft, a splined portion on said fixed hub in mating engagement with said shaft spline providing a driving connection therebetween, a reciprocable pulley flange and integral hub of stamped sheet metal construction coaxially positioned upon said fixed hub for axial reciprocable movement relative to said fixed hub, said fixed and reciprocable hubs each having a splined portion in mating engagement drivingly connecting said fixed and reciprocable flanges, a Belleville spring, said stamped sheet metal fixed hub having three equiangularly spaced projections extending radially outwardly therefrom, said spring having three equiangularly spaced notches in the internal circumferential surface of said spring, said spring being coaxially positioned upon said fixed hub with said notches receiving the three equiangularly spaced projections on said fixed hub permitting assembly of said spring thereon, a radially extending flange on said stamped sheet metal reciprocable hub, a locking tang struck from the outer periphery of said radially extending flange, and said Belleville spring containing a locking notch receiving said tang when said spring is rotated moving said notches out of alignment with said projections thereby locking said Belleville spring in place and retaining said adjustable pulley in assembled relationship while said Belleville spring is effective to continuously urge said reciprocable flange into engagement with said V-belt.

Claim 7

An adjustable pulley of stamped sheet metal construction having a variable effective diameter drivingly engaging a V-belt at the effective diameter comprising in combination; a shaft, a fixed pulley flange and integral hub of stamped sheet metal construction positioned upon and secured to said shaft for rotation therewith, said shaft containing a spline groove, said integral hub including a depressed internally extending male spline mating with said shaft groove providing the driving connection therebetween, a reciprocable pulley flange and integral hub of stamped sheet metal construction coaxially positioned upon said fixed hub for axial reciprocable movement relative to said fixed hub, said fixed and reciprocable hubs each having a splined portion in mating engagement drivingly connecting said fixed and reciprocable flanges, said stamped sheet metal fixed hub having three equiangularly spaced projections extending radially outwardly therefrom, a Belleville spring, said spring having three equiangularly spaced notches in an internal circumferential surface of said spring, said spring being coaxially positioned upon said fixed hub with said notches receiving the three equiangularly spaced projections on said fixed hub permitting axial movement of said spring past said projections relative to said fixed hub, a radially extending flange on said reciprocable hub, and a locking tang struck from the outer periphery of said radially extending flange, said Belleville spring containing a locking notch whereby rotation of said spring aligning said tang with said notch positions said spring notches out of alignment with said hub projections and said spring being seated against said projections, said tang engaging said spring notch when said spring is slightly depressed and the subsequent release thereof applying a spring force against said hub projections and said tang positively retaining the pulley assembled.

Claim 8

An adjustable pulley of stamped sheet metal construction having a variable effective diameter drivingly engaging a V-belt at the effective diameter comprising in combination; a shaft, a fixed pulley flange and integral hub of stamped sheet metal construction positioned upon and secured to said shaft for rotation therewith, said shaft containing a spline groove, said integral hub including a depressed internally extending male spline mating with said shaft groove providing the driving connection therebetween, a reciprocable pulley flange and integral hub of stamped sheet metal construction coaxially positioned upon said fixed hub for axial reciprocable movement relative to said fixed hub, said fixed and reciprocable hubs each having a splined portion in mating engagement drivingly connecting said fixed and reciprocable flanges, said stamped sheet metal fixed hub having three equiangularly spaced projections extending radially outwardly therefrom, a Belleville spring, said spring having three equiangularly spaced notches in an internal circumferential surface of said spring, said spring being coaxially positioned upon said fixed hub with said notches receiving the three equiangularly spaced projections on said fixed hub permitting axial movement of said spring past said projections relative to said fixed hub, a radially extending flange on said reciprocable hub, and a locking tang struck from the outer periphery of said radially extending flange, said Belleville spring containing a locking notch whereby rotation of said spring aligning said tang with said notch positions said spring notches out of alignment with said hub projections and said spring being seated against said projections, said tang engaging said spring notch when said spring is slightly depressed and the subsequent release thereof applying a spring force against said hub projections and said tang positively retaining the pulley assembled.