Rope pulley hoist with improved holding means

Claim 2

A power unit useful for pulling a load with a rope line, comprising: a. a frame for attachment to a fixed object, b. a pulley member rotatably mounted on said frame and having an annular groove to receive a single strand of rope line, c. means for pressing said rope line in contact against the pulley member during rotation of the pulley member whereby the rope line is maintained in tHe annular groove while having a load thereon when the pulley member is rotating in either a clockwise or counter clockwise direction, d. means for stripping said rope from the pulley member while the power unit is loaded, e. said rope stripping means being disposed a spaced distance around the periphery of the pulley member from the pressing means so that an unlimited length of rope may be used with said unit, f. said pressing means and said stripping means being disposed in a fixed relationship with respect to each other and the pulley member, g. ratchet teeth carried by said pulley member for driving same, h. a swingable operating lever pivotally mounted on the frame, i. a feeding pawl pivoted to the operating lever and engageable with the ratchet teeth to rotate the pulley member when the operating lever is swung in one direction, and j. a holding pawl pivotally mounted and resiliently biased toward active engagement with the ratchet teeth.

Claim 3

A power unit as defined in claim 1 wherein the pulley member has a plurality of ribs and troughs disposed transversely to the circumference of the annular groove and at regular intervals along the surface thereof.

Claim 4

A power unit as defined in claim 1 wherein the annular groove has inclined lateral surfaces and a plurality of ribs and troughs disposed transversely to the circumference of the annular groove and at regular intervals along said inclined lateral surfaces.

Claim 5

A power unit as defined in claim 1 wherein the pulley member includes means disposed within the annular groove to enhance the gripping action on the rope.

Claim 6

A power unit as defined in claim 1 wherein said stripping means includes a rope stripper member disposed adjacent the pulley member and extending into the annular groove by an amount sufficient to cause the rope to be disengaged from the annular groove after it has been pressed against the pulley member by said pressing means.

Claim 7

A power unit as defined in claim 1 wherein said stripping means includes a stripper member fixedly mounted on said frame and extending into the annular groove of the pulley member by an amount sufficient to cause the rope to be disengaged from the annular groove.

Claim 8

A power unit as defined in claim 1 wherein said pressing means includes a rope holding member fixedly disposed adjacent the pulley member to hold a rope in pressing contact with said annular groove.

Claim 9

A power unit as defined in claim 1 wherein the pulley member has a plurality of ribs and troughs disposed transversely to the circumference of the annular groove and at regular intervals along the surface thereof, said pressing means includes a rope holding member fixedly disposed adjacent the pulley member to hold a rope in pressing contact with said annular groove, said stripping means includes a rope stripper member disposed adjacent the pulley member and extending into the annular groove by an amount sufficient to cause the rope to be disengaged from the annular groove after it has been pressed against the pulley member by said pressing means.

Claim 10

A power unit useful for pulling, comprising: a. a frame for attachment to a fixed object, b. a pulley member rotatably mounted on said frame and having an annular groove to receive a single strand of rope line, c. means for pressing said rope line against the pulley member, d. said pressing means including a bar portion which extends in a direction parallel to the axis of rotation of the pulley member, e. said bar portion being disposed a fixed, effective distance from the periphery of the pulley member to press a rope into positive engagement with the annular groove as the pulley member rotates past said bar portion, f. means for stripping said rope from the pulley member while the power unit is loaded, g. said rope stripping means being disposed a spaced distance around the periphery of the pulley member from the pressing means so thAt an unlimited length of rope may be used with said unit, h. said pressing means and said stripping means being disposed in a fixed relationship with respect to each other and the pulley member, i. ratchet teeth carried by said pulley member for driving same, j. a swingable operating lever pivotally mounted on the frame, k. a feeding pawl pivoted to the operating lever and engageable with the ratchet teeth to rotate the pulley member when the operating lever is swung in one direction, and l. the holding pawl pivotally mounted and resiliently biased toward active engagement with the ratchet teeth.

Claim 11

A power unit useful for pulling, comprising: a. a frame for attachment to a fixed object, b. a pulley member rotatably mounted on said frame and having an annular groove to receive a single strand of rope line, c. means for pressing said rope line against the pulley member, d. said pressing means including a bar portion which extends in a direction parallel to the axis of rotation of the pulley member, e. said bar portion being disposed a fixed, effective distance from the periphery of the pulley member to press a rope into positive engagement with the annular groove as the pulley member rotates past said bar portion, f. means for stripping said rope from the pulley member while the power unit is loaded, g. said rope stripping means being disposed a spaced distance around the periphery of the pulley member from the pressing means so thAt an unlimited length of rope may be used with said unit, h. said pressing means and said stripping means being disposed in a fixed relationship with respect to each other and the pulley member, i. ratchet teeth carried by said pulley member for driving same, j. a swingable operating lever pivotally mounted on the frame, k. a feeding pawl pivoted to the operating lever and engageable with the ratchet teeth to rotate the pulley member when the operating lever is swung in one direction, and l. the holding pawl pivotally mounted and resiliently biased toward active engagement with the ratchet teeth.

Claim 12

A power unit useful for pulling, comprising: a. a frame for attachment to a fixed object, b. a pulley member rotatably mounted on said frame and having an annular groove to receive a single strand of rope line, c. means for pressing said rope line against the pulley member, d. said pressing means including a generally U-shaped bracket member fixedly mounted on said frame and having a bar portion which extends in a direction parallel to the axis of rotation of the pulley member, e. said bar portion being disposed a fixed, effective distance from the periphery of the pulley member to press a rope into positive engagement with the annular groove as the pulley member rotates past said bar portion, f. means for stripping said rope from the pulley member while the power unit is loaded, g. said rope stripping means being disposed a spaced distance around the periphery of the pulley member from the pressing means so that an unlimited length of rope may be used with said unit, h. said pressing means and said stripping means being disposed in a fixed relationship with respect to each other and the pulley member, i. ratchet teeth carried by said pulley member for driving same, j. a swingable operating lever pivotally mounted on the frame, k. a feeding pawl pivoted to the operating lever and engageable with the ratchet teeth to rotate the pulley member when the operating lever is swung in one direction, and l. the holding pawl pivotally mounted and resiliently biased toward active engagement with the ratchet teeth.

Claim 13

A power unit useful for pulling, comprising: a. a frame for attachment to a fixed object, b. a pulley member rotatably mounted on said frame and having an annular groove to receive a single strand of rope line, c. means for pressing said rope line against the pulley member, d. said pressing means including a generally U-shaped bracket member fixedly mounted on said frame and having a bar portion which extends in a direction parallel to the axis of rotation of the pulley member, e. said bar portion being disposed a fixed, effective distance from the periphery of the pulley member to press a rope into positive engagement with the annular groove as the pulley member rotates past said bar portion, f. means for stripping said rope from the pulley member while the power unit is loaded, g. said rope stripping means being disposed a spaced distance around the periphery of the pulley member from the pressing means so that an unlimited length of rope may be used with said unit, h. said pressing means and said stripping means being disposed in a fixed relationship with respect to each other and the pulley member, i. ratchet teeth carried by said pulley member for driving same, j. a swingable operating lever pivotally mounted on the frame, k. a feeding pawl pivoted to the operating lever and engageable with the ratchet teeth to rotate the pulley member when the operating lever is swung in one direction, and l. the holding pawl pivotally mounted and resiliently biased toward active engagement with the ratchet teeth.

Claim 14

A power unit as defined in claim 10 wherein said bracket member includes guide means for directing a rope into the annular groove at a point located between said bar portion and said pulley member.