Patent US3699655A successfully refreshed from Google Patents.
US3699655A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Power driven hand tool
Assignee: Porter Cable Corp
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Filing: 1971-01-18
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Granted: 1972-10-24
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Expires: 1991-01-18
Abstract
Abstract A power driven hedge trimmer having a substantially mirror image pair of cooperating, relatively reciprocable cutter blades and being operatively interchangeable one with the other for use as either the top blade or the bottom blade in a dual cutter blade assembly. The dual cutter blade assembly is supported from a support bar having one end received in a split clam shell housing. The support bar overlies the cutter blade assembly and is supported by the housing by being separably trapped at its one end between the halves of the clam shell housing. Another feature disclosed herein pertains to a pair of axially spaced bearing plates for journalling a motor armature shaft and gear-mounting shafts. The bearing plates are trapped in position between the halves of the split clam shell housing and are constructed in such a manner that forces tending to turn or twist the bearing plates will be about an axis aligning with the rotational axis of the armature shaft.
Inventors
- 👤 Robert W Taylor
- 👤 Jerry W Sellers
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 15:05
CPC Classifications
A; A01; A01G; A01G3/00; A01G3/04; A01G3/047; A01G3/053
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
112 words
In a power driven hedge trimmer, a housing having body portion, an elongated cutter blade support member received at one end in said body portion, at least one cutter blade supported from said support member for relative reciprocatory movement in overlapping relation with said member, and means in said housing for reciprocating said cutter blade, at least said body portion of said housing being divided longitudinally of said support member into a pair of separately formed shells, said support member being trapped in position at said one end between interior surfaces of said shells and being secured in place only by separable surface seating engagement with said interior surfaces of said shells.
Claim 2
Dependent Claim
112 words
In a power driven hedge trimmer, a housing having body portion, an elongated cutter blade support member received at one end in said body portion, at least one cutter blade supported from said support member for relative reciprocatory movement in overlapping relation with said member, and means in said housing for reciprocating said cutter blade, at least said body portion of said housing being divided longitudinally of said support member into a pair of separately formed shells, said support member being trapped in position at said one end between interior surfaces of said shells and being secured in place only by separable surface seating engagement with said interior surfaces of said shells.
Claim 3
Dependent Claim
25 words
The power driven hedge trimmer defined in claim 1 wherein said support member overlies said cutter blade when said housing is in an upright position.
Claim 4
Dependent Claim
70 words
The power driven hedge trimmer defined in claim 1 there being a pair of coacting cutter blades supported from said support member for relative reciprocatory movement, said cutter blade reciprocating means being operatively connected to both cutter blades of said pair to reciprocate said blades in opposite directions, and said blades of said pair having coacting sets of cutting teeth that provide a shearing action upon reciprocation in opposite directions.
Claim 5
Dependent Claim
25 words
The power driven hedge trimmer defined in claim 3 wherein said support member is formed without cutting teeth and overlies the blades of said pair.
Claim 6
Dependent Claim
58 words
The power driven hedge trimmer defined in claim 4 wherein said cutter blade reciprocating means is operatively connected to corresponding ends of the cutter blades of said pair, said corresponding ends being received in said body portion and being in underlying relation to said one end of said support member when said housing is in an upright position.
Claim 7
Dependent Claim
91 words
The power driven hedge trimmer defined in claim 5 wherein said shells are formed with opposing internal cavities having the interior surfaces that seat against said one end of said support member to trap said support member in place, said opposing cavities defining a compartment in said body portion, a crank assembly forming a part of said cutter reciprocating means and being mounted in said compartment for operative connection to said corresponding ends of said pair of cutter blades, and said one end of said support member extending through said compartment.
Claim 8
Dependent Claim
112 words
In a power driven hedge trimmer, an elongated cutter blade support member, at least one cutter blade reciprocably supported from said support member, a housing receiving corresponding ends of said support member and said cutter blade, and means disposed in said housing and operatively connected to the end of said cutter blade received in said housing for reciprocating said cutter blade, and said support member overlying said cutter blade when said housing is in an upright position and being secured against movement relative to said housing at its end received in said housing only at a region that is disposed above said cutter blade when said housing is in an upright position.
Claim 9
Dependent Claim
112 words
In a power driven hedge trimmer, an elongated cutter blade support member, at least one cutter blade reciprocably supported from said support member, a housing receiving corresponding ends of said support member and said cutter blade, and means disposed in said housing and operatively connected to the end of said cutter blade received in said housing for reciprocating said cutter blade, and said support member overlying said cutter blade when said housing is in an upright position and being secured against movement relative to said housing at its end received in said housing only at a region that is disposed above said cutter blade when said housing is in an upright position.
Claim 10
Dependent Claim
149 words
In a power driven hedge trimmer, an elongated cutter blade support bar, a pair of relatively reciprocable cutter blades reciprocably supported from said support bar, coacting sets of cutting teeth along oppositely facing side edges of said cutter blades, a housing receiving corresponding ends of said support bar and said cutter blades, and drive means in said housing and operatively connected to the corresponding ends of the cutter blades that are received in said housing for reciprocating said cutter blades in opposite directions, said support bar (a) having a portion extending longitudinally Of and overlying said pair of cutter blades when said housing is in an upright position and (b) being secured against movement relative to said housing at its end that is received in said housing, and said portion of said support bar lying entirely between the roots of the cutting teeth at opposite edges of said blades.
Claim 11
Dependent Claim
149 words
In a power driven hedge trimmer, an elongated cutter blade support bar, a pair of relatively reciprocable cutter blades reciprocably supported from said support bar, coacting sets of cutting teeth along oppositely facing side edges of said cutter blades, a housing receiving corresponding ends of said support bar and said cutter blades, and drive means in said housing and operatively connected to the corresponding ends of the cutter blades that are received in said housing for reciprocating said cutter blades in opposite directions, said support bar (a) having a portion extending longitudinally Of and overlying said pair of cutter blades when said housing is in an upright position and (b) being secured against movement relative to said housing at its end that is received in said housing, and said portion of said support bar lying entirely between the roots of the cutting teeth at opposite edges of said blades.
Claim 12
Dependent Claim
112 words
In a power driven hedge trimmer, an elongated cutter blade support bar, a pair of relatively reciprocable cooperating cutter blades underlying and reciprocably supported from said support bar, a housing receiving corresponding ends of said support bar and said cutter blades, and drive means disposed in said housing and having a crank assembly operatively connected to said corresponding ends of said cutter blades for reciprocating said blades in opposite directions, said support bar being fixed against movement at its corresponding end in said housing, and said corresponding end of said support bar overlying said crank assembly and said corresponding ends of said blades when said housing is disposed in an upright position.
Claim 13
Dependent Claim
112 words
In a power driven hedge trimmer, an elongated cutter blade support bar, a pair of relatively reciprocable cooperating cutter blades underlying and reciprocably supported from said support bar, a housing receiving corresponding ends of said support bar and said cutter blades, and drive means disposed in said housing and having a crank assembly operatively connected to said corresponding ends of said cutter blades for reciprocating said blades in opposite directions, said support bar being fixed against movement at its corresponding end in said housing, and said corresponding end of said support bar overlying said crank assembly and said corresponding ends of said blades when said housing is disposed in an upright position.
Claim 14
Dependent Claim
118 words
In a power driven hedge trimmer, a pair of cooperating, overlapping, relatively reciprocable cutter blades, a housing receiving corresponding ends of said cutter blades, and cutter blade drive means mounted in said housing and comprising an electric motor having a rotatable armature shaft, and means including a crank assembly drive connecting said shaft to said corresponding cutter blade ends for reciprocating said blades in opposite directions, said crank assembly comprising a pair of connecting rods respectively connected to said corresponding cutter blade ends, with said corresponding cutter blade ends lying between said connecting rods, and said motor being vertically disposed above said crank assembly and said corresponding cutter blade ends when said housing is in an upright position.
Claim 15
Dependent Claim
118 words
In a power driven hedge trimmer, a pair of cooperating, overlapping, relatively reciprocable cutter blades, a housing receiving corresponding ends of said cutter blades, and cutter blade drive means mounted in said housing and comprising an electric motor having a rotatable armature shaft, and means including a crank assembly drive connecting said shaft to said corresponding cutter blade ends for reciprocating said blades in opposite directions, said crank assembly comprising a pair of connecting rods respectively connected to said corresponding cutter blade ends, with said corresponding cutter blade ends lying between said connecting rods, and said motor being vertically disposed above said crank assembly and said corresponding cutter blade ends when said housing is in an upright position.
Claim 16
Dependent Claim
63 words
The power driven hedge trimmer defined in claim 10 comprising a support bar extending longitudinally of and overlying said cutter blades, and means carried by said support bar for supporting said blades for reciprocation from said support bar, and said support bar being supported in said housing at an end portion received in said housing, and said end portion overlying said connecting rods.
Claim 17
Dependent Claim
74 words
The power driven hedge trimmer defined in claim 10 comprising a support bar extending longitudinally of and overlying said cutter blades, said cutter blades being supported for reciprocating motion from said support bar, said support bar being supported in said housing at an end portion received in said housing, said motor having an armature and stator winding assembly, and said end portion lying between said armature and stator winding assembly and said crank assembly.
References Cited (Backward Citations)
US3083457A
Cited
US3212188A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-10-24 | 1976-04-24 | 1976-10-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-10-24 | 1980-04-24 | 1980-10-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-10-24 | 1984-04-24 | 1984-10-24 | $7700.00 | Window Closed / Lapsed |