US4483070A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Portable backpacked cutter
Assignee: DOERSTLER J LESTER
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Filing: 1982-09-21
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Granted: 1984-11-20
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Expires: 2002-09-21
Abstract
Abstract The present disclosure is directed to a portable cutter particularly useful in trimming and shaping standing growing trees of the evergreen type which has a cutting head mounted on one end of a rod, and a pistol grip type control handle on the other end. A second handle is secured on the rod substantially midway between the control handle and cutting head. A back pack having partial waist encircling support means with a belt and a securing buckle is provided with a pair of spaced apart vertical standards secured to said encircling support having a transverse connector therebetween above said waist support. The back pack is retained on the operator by a pair of shoulder strap connector means attached to each end of center of said transverse connector and connectable to said waist support. Back pack extension and guide means is carried by and secured to at least one of the vertical standards. A cutter suspension shock cord is adapted to be connected between the back pack extension and the cutter rod proximate the cutting head and being adjustable along the rod to permit adjustability for varying the apparent weight of the cutter from an apparent zero to an amount desired by the operator to provide maximum maneuverability with a minimum of operator fatigue. The prime mover is carried by the back pack above the waist encircling support and supplies power to a motor connected to drive the cutting head and being carried thereby. There is a selectively operable control connected between the prime mover and motor for selectively driving the motor under control of the pistol grip control handle.
Inventors
- 👤 Howard C. Junkermann
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 19:42
CPC Classifications
A; A01; A01G; A01G3/00; A01G3/08; A01G3/04; A01G3/0417; A01G3/047; A01G3/053; A01G3/0535; F; F02; F02B; F02B1/00; F02B1/02; F02B1/04
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
316 words
In combination, a portable cutter having: (a) a cutting head mounted on one end of a rod, and a piston grip type control handle means on the other end of said rod, and having a second handle means on said rod substantially midway between the control handle and cutting head, (b) a back pack having partial waist encircling support means with belt and a securing buckle, a pair of spaced apart vertical standards secured to said encircling support having a transverse connector therebetween above said waist support, a pair of shoulder strap connector means attached to each end of center of said transverse connector and connectable to said waist support, back pack extension and guide means carried by and secured to at least one of said vertical standards, (c) elastomeric cutter suspension shock cord connected between said back pack extension and guide means and said cutter rod proximate the cutting head (d) a prime mover carried by said back pack above said waist encircling support means, (e) motor means connected to drive said cutting head and being carried thereby, (f) and selectively operable switch control means connected between said prime mover and motor means for selectively driving the motor means under control of said pistol grip control handle (g) wherein said suspension shock cord extends from the back pack extension and guide means, passes over a pulley connected to the back of the cutting head along the control rod to a pulley secured to a forward portion of the pistol grip handle on the control rod and then to an adjustable collar means between said pulleys which is positionable along the control rod to allow the apparent weight of the cutting head combination and control rod, on the arms of the operatior, to be varied from zero to that desired by the operator based upon cutting conditions, thus affording the operator maximum maneuverability and minimum fatigue.
Claim 2
Dependent Claim
316 words
In combination, a portable cutter having: (a) a cutting head mounted on one end of a rod, and a piston grip type control handle means on the other end of said rod, and having a second handle means on said rod substantially midway between the control handle and cutting head, (b) a back pack having partial waist encircling support means with belt and a securing buckle, a pair of spaced apart vertical standards secured to said encircling support having a transverse connector therebetween above said waist support, a pair of shoulder strap connector means attached to each end of center of said transverse connector and connectable to said waist support, back pack extension and guide means carried by and secured to at least one of said vertical standards, (c) elastomeric cutter suspension shock cord connected between said back pack extension and guide means and said cutter rod proximate the cutting head (d) a prime mover carried by said back pack above said waist encircling support means, (e) motor means connected to drive said cutting head and being carried thereby, (f) and selectively operable switch control means connected between said prime mover and motor means for selectively driving the motor means under control of said pistol grip control handle (g) wherein said suspension shock cord extends from the back pack extension and guide means, passes over a pulley connected to the back of the cutting head along the control rod to a pulley secured to a forward portion of the pistol grip handle on the control rod and then to an adjustable collar means between said pulleys which is positionable along the control rod to allow the apparent weight of the cutting head combination and control rod, on the arms of the operatior, to be varied from zero to that desired by the operator based upon cutting conditions, thus affording the operator maximum maneuverability and minimum fatigue.
Claim 3
Dependent Claim
34 words
A portable cutter as claimed in claim 1 wherein the prime mover is a gasoline engine powered alternator mounted on a pair of mount brackets secured between the vertical standards of said back pack.
Claim 4
Dependent Claim
36 words
A portable cutter as claimed in claim 1 wherein said selectively operable control means is a trigger actuated switch on the pistol grip and being in circuit between said prime mover and cutting head motor means.
Claim 5
Dependent Claim
15 words
A portable cutter as claimed in claim 1 wherein the prime mover is a battery.
Claim 6
Dependent Claim
97 words
A portable cutter as claimed in claim 1 wherein the cutting head has static comb teeth extending to each side of the rod, a three bladed cutter secured to be driven by the motor means, comb means to each side of said cutter being bent down ninety degrees to act as a guide so that only items to be cut are within the action of the blades, and cutting head adjusting means between said rod and comb to permit the angle of the cutting head to be varied to best suit a particular type of trimming operation.
Claim 7
Dependent Claim
239 words
In combination, a portable cutter having: (a) a cutting head mounted on one end of a rod, and a pistol grip type control handle means on the other end of said rod, and having a second handle means on said rod substantially midway between the control handle and cutting head, (b) a back pack having partial waist encircling support means with belt and a securing buckle, a pair of spaced apart vertical standards secured to said encircling support having a transverse connector therebetween above said waist support, a pair of shoulder strap connector means attached to each end of center of said transverse connector and connectable to said waist support, back pack extension and guide means comprising a tubular extension received and anchored in one of said vertical standards, (c) elastomeric cutter suspension shock cord connected between said tubular extension and said cutter rod proximate the cutting head and being adjustable along said rod to permit adjustability for varying the weight of said cutter from an apparent zero to an amount desired by the operator thereby reducing operator fatigue to a minimum, (d) a prime mover carried by said back pack above said waist encircling support means, (e) motor means connected to drive said cutting head and being carried thereby, (f) and selectively operable switch control means connected between said prime mover and motor means for selectively driving the motor means under control of said pistol grip control handle.
Claim 8
Dependent Claim
239 words
In combination, a portable cutter having: (a) a cutting head mounted on one end of a rod, and a pistol grip type control handle means on the other end of said rod, and having a second handle means on said rod substantially midway between the control handle and cutting head, (b) a back pack having partial waist encircling support means with belt and a securing buckle, a pair of spaced apart vertical standards secured to said encircling support having a transverse connector therebetween above said waist support, a pair of shoulder strap connector means attached to each end of center of said transverse connector and connectable to said waist support, back pack extension and guide means comprising a tubular extension received and anchored in one of said vertical standards, (c) elastomeric cutter suspension shock cord connected between said tubular extension and said cutter rod proximate the cutting head and being adjustable along said rod to permit adjustability for varying the weight of said cutter from an apparent zero to an amount desired by the operator thereby reducing operator fatigue to a minimum, (d) a prime mover carried by said back pack above said waist encircling support means, (e) motor means connected to drive said cutting head and being carried thereby, (f) and selectively operable switch control means connected between said prime mover and motor means for selectively driving the motor means under control of said pistol grip control handle.
Claim 9
Dependent Claim
29 words
A portable cutter as claimed in claim 6 wherein a portion of the cutter suspension shock cord is anchored to and extends from within said extension and guide means.
Claim 10
Dependent Claim
63 words
A portable cutter as claimed in claim 6 wherein the suspension shock cord passes beneath a swivel pulley connected adjacent said cutting head is passed over a pulley secured to said rod adjacent said pistol grip and is anchored to a collar means slidably selectively positionable along said rod to vary the weight of said cutter to reduce operator fatigue to a minimum.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1987-11-20 | 1988-05-21 | 1988-11-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-11-20 | 1992-05-21 | 1992-11-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-11-20 | 1996-05-21 | 1996-11-20 | $7700.00 | Window Closed / Lapsed |