Patent US3835535A successfully refreshed from Google Patents.
US3835535A
Expired / Lapsed
US
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Pole pruner with improved cutting head
Assignee: O AMES Co A CORPOF
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Filing: 1973-08-20
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Granted: 1974-09-17
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Expires: 1993-08-20
Abstract
Abstract A pole pruner having a cutting head of the single anvil type in which the cutting blade is formed of a relatively thin blade structure having an essentially single bevel construction with a non-symmetrical straight cutting edge, the cutting blade being arranged with respect to the fixed anvil member shape and location so that the free end of the cutting blade is slidably supported by the fixed anvil member during the portion of the cutting stroke where binding and lateral flexure is most likely to occur.
Inventors
- 👤 J Robison
- 👤 H Eads
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 13:02
CPC Classifications
A; A01; A01G; A01G3/00; A01G3/08; Y; Y10; Y10S; Y10S16/00; Y10S16/25
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
545 words
In a pole pruner of the type including an elongated handle, a cutting head assembly on one end of said handle including a fixed member operable to be engaged with a limb or the like and a movable member operable to be moved through a cutting stroke with relation to the limb engaged by said fixed member, a rope and pulley assembly operatively connected with said movable member and extending to the opposite end portion of said handle for effecting movement of said movable member through said cutting stroke in response to a manually effected pull, and spring means for effecting movement of said movable member through a return stroke, the improvement in said cutting head assembly which comprises said fixed member being a rigid metallic member having an end portion fixedly connected with said one end of said handle, a first intermediate portion extending generally longitudinally outwardly of said one end of said handle, a second intermediate portion extending transversely from said first intermediate portion, and a free end portion extending transversely inwardly from said second intermediate portion in spaced relation to said first intermediate portion, said first intermediate portion including a straight limb engaging surface facing in a direction toward said free end portion, said free end portion including a limb engaging surface facing toward said first intermediate portion, said second intermediate portion having a limb engaging surface interconnecting the limb engaging surfaces of said first intermediate portion and said free end portion, said first and second intermediate portioNs and said free end portion having a common planar surface intersecting the limb engaging surfaces thereof, said movable member being a rigid metallic member including a cutting blade portion and a lever arm portion, means for mounting said movable member on said fixed member for pivotal movement between two limiting positions about an axis extending perpendicular to the aforesaid common planar surface and disposed adjacent the juncture between said first and second intermediate portions and the juncture between said cutting blade and lever arm portions, said cutting blade portion having a planar surface disposed in a position to slidably engage the common planar surface of said first intermediate portion and said free end portion during said cutting stroke, a straight cutting edge substantially intersecting the planar surface thereof, and bevel surface means extending from said straight cutting edge, said straight cutting edge being disposed in substantial alignment with the straight limb engaging surface of said first intermediate portion at the initiation of said cutting stroke and extending generally at right angles thereto and in general alignment with the outermost portion of the limb engaging surface of said second intermediate portion at the completion of said cutting stroke, the extent of said cutting blade portion from said pivotal axis being so related to the extent of said free end portion from said second intermediate portion that the outer extremity of said blade portion overlaps the outer extremity of said free end portion during the cutting stroke of said cutting blade portion when said cutting edge has reached an angular position of approximately 45* with respect to the straight limb engaging surface of said first intermediate portion, the outer extremity of said free end portion having a cam surface thereon merging into the planar surface thereof.
Claim 2
Dependent Claim
545 words
In a pole pruner of the type including an elongated handle, a cutting head assembly on one end of said handle including a fixed member operable to be engaged with a limb or the like and a movable member operable to be moved through a cutting stroke with relation to the limb engaged by said fixed member, a rope and pulley assembly operatively connected with said movable member and extending to the opposite end portion of said handle for effecting movement of said movable member through said cutting stroke in response to a manually effected pull, and spring means for effecting movement of said movable member through a return stroke, the improvement in said cutting head assembly which comprises said fixed member being a rigid metallic member having an end portion fixedly connected with said one end of said handle, a first intermediate portion extending generally longitudinally outwardly of said one end of said handle, a second intermediate portion extending transversely from said first intermediate portion, and a free end portion extending transversely inwardly from said second intermediate portion in spaced relation to said first intermediate portion, said first intermediate portion including a straight limb engaging surface facing in a direction toward said free end portion, said free end portion including a limb engaging surface facing toward said first intermediate portion, said second intermediate portion having a limb engaging surface interconnecting the limb engaging surfaces of said first intermediate portion and said free end portion, said first and second intermediate portioNs and said free end portion having a common planar surface intersecting the limb engaging surfaces thereof, said movable member being a rigid metallic member including a cutting blade portion and a lever arm portion, means for mounting said movable member on said fixed member for pivotal movement between two limiting positions about an axis extending perpendicular to the aforesaid common planar surface and disposed adjacent the juncture between said first and second intermediate portions and the juncture between said cutting blade and lever arm portions, said cutting blade portion having a planar surface disposed in a position to slidably engage the common planar surface of said first intermediate portion and said free end portion during said cutting stroke, a straight cutting edge substantially intersecting the planar surface thereof, and bevel surface means extending from said straight cutting edge, said straight cutting edge being disposed in substantial alignment with the straight limb engaging surface of said first intermediate portion at the initiation of said cutting stroke and extending generally at right angles thereto and in general alignment with the outermost portion of the limb engaging surface of said second intermediate portion at the completion of said cutting stroke, the extent of said cutting blade portion from said pivotal axis being so related to the extent of said free end portion from said second intermediate portion that the outer extremity of said blade portion overlaps the outer extremity of said free end portion during the cutting stroke of said cutting blade portion when said cutting edge has reached an angular position of approximately 45* with respect to the straight limb engaging surface of said first intermediate portion, the outer extremity of said free end portion having a cam surface thereon merging into the planar surface thereof.
Claim 3
Dependent Claim
22 words
The improvement as defined in claim 1 wherein said movable member and said fixed member are both formed from flat plate stock.
Claim 4
Dependent Claim
36 words
The improvement as defined in claim 2 wherein said cam surface is provided by bending the outer extremity of said free end portion in a direction away from the planar surface of said cutting blade portion.
Claim 5
Dependent Claim
89 words
The improvement as defined in claim 3 wherein said bevel surface means includes first straight double bevel surfaces, each extending from said cutting edge at an angle of approximately 45* with respect to a plane intersecting said cutting edge and extending parallel to the planar surface of said cutting blade portion and a second straight bevel surface extending from one of said first bevel surfaces to the surface of said cutting blade portion opposite the planar surface thereof at an angle to the latter of approximately 6- 3/4 *.
Claim 6
Dependent Claim
16 words
The improvement as defined in claim 4 wherein said cutting blade portion is coated with Teflon.
Claim 7
Dependent Claim
19 words
The improvement as defined in claim 5 wherein the entire exterior of the movable member is coated with Teflon.
Claim 8
Dependent Claim
41 words
The improvement as defined in claim 2 wherein the limb engaging surface of said second intermediate portion is arcuate about a single axis and interconnects tangentially with the limb engaging surfaces of said first intermediate portion and said free end portion.
Claim 9
Dependent Claim
44 words
The improvement as defined in claim 7 wherein the limb engaging surface of said free end portion is straight and diverges toward the outer extremity thereof at an angle of approximately 16* with respect to the limb engaging surface of said first intermediate portion.
Claim 10
Dependent Claim
32 words
The improvement as defined in claim 1 including a pruning saw and means for detachably fixedly securing said pruning saw to said second intermediate portion in generally longitudinally outwardly extending relation therewith.
Claim 11
Dependent Claim
244 words
In a pole pruner of the type including an elongated telescopic handle assembly, a cutting head assembly on one end of said handle assembly including a fixed member operable to be engateD with a limb or the like and a movable member operable to be moved through a cutting stroke with relation to the limb engaged by said fixed member, a rope and pulley assembly operatively connected with said movable member and extending to the opposite end portion of said handle assembly for effecting movement of said movable member through said cutting stroke in response to a manually effected pull, and spring means for effecting movement of said movable member through a return stroke, the improvement in said telescopic handle assembly which comprises a first tubular handle part, a second tubular handle part telescopically mounted within said first handle part and extending outwardly from one end thereof, and a combined handle part securing and rope guiding assembly including securing means fixedly secured to the exterior periphery of the one end of said first handle part and releasably fixedly connected with the exterior periphery of the portion of said second handle part extending outwardly thereof for releasably fixedly securing said second handle part with respect to said first handle part in any desired position of telescopic adjustment, and guiding means for receiving and guiding the portion of the rope of said rope and pulley assembly extending to the opposite end portion of said handle assembly.
Claim 12
Dependent Claim
244 words
In a pole pruner of the type including an elongated telescopic handle assembly, a cutting head assembly on one end of said handle assembly including a fixed member operable to be engateD with a limb or the like and a movable member operable to be moved through a cutting stroke with relation to the limb engaged by said fixed member, a rope and pulley assembly operatively connected with said movable member and extending to the opposite end portion of said handle assembly for effecting movement of said movable member through said cutting stroke in response to a manually effected pull, and spring means for effecting movement of said movable member through a return stroke, the improvement in said telescopic handle assembly which comprises a first tubular handle part, a second tubular handle part telescopically mounted within said first handle part and extending outwardly from one end thereof, and a combined handle part securing and rope guiding assembly including securing means fixedly secured to the exterior periphery of the one end of said first handle part and releasably fixedly connected with the exterior periphery of the portion of said second handle part extending outwardly thereof for releasably fixedly securing said second handle part with respect to said first handle part in any desired position of telescopic adjustment, and guiding means for receiving and guiding the portion of the rope of said rope and pulley assembly extending to the opposite end portion of said handle assembly.
Claim 13
Dependent Claim
75 words
The improvement as defined in claim 10, wherein said rope portion is formed with a knot at a position to engage said guide means when said second handle part is moved into a fully extended position of telescopic adjustment with respect to said first handle part providing the operator with indicia of the relative telescopic position of said handle parts so as to prevent disengagement of said second handle part from said first handle part.
Claim 14
Dependent Claim
48 words
The improvement as defined in claim 11, wherein the exterior surface of said second handle part adjacent the portion extending from the one end of said first handle part when said second handle part is in a fully extended position of telescopic adjustment is provided with color indicia.
Claim 15
Dependent Claim
139 words
The improvement as defined in claim 10, wherein said securing means includes a pair of cooperating clamping plates, each comprising a pair of longitudinally spaced generally semi-cylindrically shaped central portions, fastener receiving tab portions extending from one end of each central portion, and an integral portion extending from the opposite ends of said central portions, means retaining said integral portions in spaced relation on one side of said handle parts, first fastener means carried by one cooperating pair of fastener receiving tab portions for releasably fixedly securing the associated central portions in friction tight engagement to said exterior periphery of said first handle part, and second fastener means carried by the other, cooperating pair of fastener receiving tab portions for effecting the releasably fixed securement of the associated central portions with said exterior periphery of said second handle part.
Claim 16
Dependent Claim
49 words
The improvement as defined in claim 13 wherein said securing means further includes a split sleeve between the second pair of central portions and said exterior periphery of said second handle part, said split sleeve having an annular flange disposed between the first and second pairs of central portions.
Claim 17
Dependent Claim
19 words
The improvement as defined in claim 15, wherein said guiding means comprises a pulley journaled between said integral portions.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-09-16 | 1978-03-18 | 1978-09-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-09-16 | 1982-03-18 | 1982-09-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-09-16 | 1986-03-18 | 1986-09-17 | $7700.00 | Window Closed / Lapsed |