US3844019A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Saw and impact resistant security bar and method of making same
Assignee: Individual
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Filing: 1973-07-12
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Granted: 1974-10-29
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Expires: 1993-07-12
Abstract
Abstract A lock shackle formed of an elongated metal core having longitudinally extending shallow grooves formed in its surface, and a thin wall tube closely fitted around the core, with the grooves filled with a matrix formed of hard carbide particles and a soft material binder.
Inventors
- 👤 W Shwayder
- 👤 B Sfar
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 22:00
CPC Classifications
E; E05; E05B; E05B67/00; E05B67/06; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/4998; Y10T428/00; Y10T428/12; Y10T428/12007; Y10T428/12014; Y10T428/12028; Y10T428/12063; Y10T428/12097; Y10T428/12229; Y10T428/12271; Y10T428/12451; Y10T428/12493; Y10T428/12771; Y10T428/12861; Y10T428/12903; Y10T428/12917; Y10T428/12924; Y10T428/12951; Y10T428/12958; Y10T428/12965; Y10T428/12972; Y10T428/12979; Y10T70/00; Y10T70/70; Y10T70/7441; Y10T70/7915; Y10T70/7921
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
99 words
A saw and impact resistant member comprising: an elongated metal core having a closely fitted, thin wall metal sheath surrounding and in face to face contact therewith; longitudinally extending core spaces, of shallow depth, formed between the surface of the core and the interior surface of the sheath, with said core spaces being filled with a matrix formed of closely packed hard particles, such as of metallic carbides and the like and a softer binder material; said sheath being closely fitted on said core to exclude both said binder and said hard particles therebetween except in said core spaces.
Claim 2
Dependent Claim
99 words
A saw and impact resistant member comprising: an elongated metal core having a closely fitted, thin wall metal sheath surrounding and in face to face contact therewith; longitudinally extending core spaces, of shallow depth, formed between the surface of the core and the interior surface of the sheath, with said core spaces being filled with a matrix formed of closely packed hard particles, such as of metallic carbides and the like and a softer binder material; said sheath being closely fitted on said core to exclude both said binder and said hard particles therebetween except in said core spaces.
Claim 3
Dependent Claim
38 words
A construction as defined in claim 1, and said member being in the form of a rod, with the core being generally spline-shaped in cross-section, wherein said core spaces are defined by the gaps between the spline teeth.
Claim 4
Independent Claim
138 words
A method of making a saw and impact resistant bar-like member comprising the steps of: forming an elongated core with spaced apart, generally longitudinally extending shallow surface grooves; closely fitting a generally tubular, thin walled sheath over said core; then filling said grooves in an endwise direction with a packing formed of particles of a hard material, such as a hard metal carbide; next, flowing a molten binder into the grooves to fill the spaces between the particles and solidifying the binder to form a solid matrix of particles and binder; said close fitting of said sheath over said core to deliberately exclude both said packing and said binder therebetween and to restrict said particles and said binder to said grooves; then swaging the member to elongate it, reduce its cross-sectional size and to work harden the metal.
Claim 5
Independent Claim
138 words
A method of making a saw and impact resistant bar-like member comprising the steps of: forming an elongated core with spaced apart, generally longitudinally extending shallow surface grooves; closely fitting a generally tubular, thin walled sheath over said core; then filling said grooves in an endwise direction with a packing formed of particles of a hard material, such as a hard metal carbide; next, flowing a molten binder into the grooves to fill the spaces between the particles and solidifying the binder to form a solid matrix of particles and binder; said close fitting of said sheath over said core to deliberately exclude both said packing and said binder therebetween and to restrict said particles and said binder to said grooves; then swaging the member to elongate it, reduce its cross-sectional size and to work harden the metal.
Claim 6
Dependent Claim
63 words
A method as defined in claim 3, and including said sheath being longer than the core, and arranging the tube and core in an upright position with the tube extending a distance above the upper end of the core, and placing the binder material into the upper ends of the tube above the core, then flowing the molten binder downwardly into the grooves.
Claim 7
Dependent Claim
37 words
A method as defined in claim 3, and including placing said binder material into the tube upper end in solidified form and thereafter melting the binder so that it flows downwardly into the grooves containing the particles.
Claim 8
Dependent Claim
20 words
A method as defined in claim 3 and including bending the swaged member into the shape of a lock shackle.
Claim 9
Dependent Claim
116 words
A saw and impact resistant member comprising: an elongated metal core surrounded by closely fitted, thin wall metal sheath; a longitudinally extending, shallow depth space formed between at least a portion of the outer surface of the core and the interior wall surface of the sheath; said spacing being filled with a matrix formed of closely packed hard particles, such as of metallic carbides and the like and a softer binder material, such as a copper braze material and the like, binding the particles together and generally filling the voids between particles; said sheath and said core being closely fitted to prevent said particles and said binder from being positioned therebetween except in said formed spaces.
Claim 10
Dependent Claim
116 words
A saw and impact resistant member comprising: an elongated metal core surrounded by closely fitted, thin wall metal sheath; a longitudinally extending, shallow depth space formed between at least a portion of the outer surface of the core and the interior wall surface of the sheath; said spacing being filled with a matrix formed of closely packed hard particles, such as of metallic carbides and the like and a softer binder material, such as a copper braze material and the like, binding the particles together and generally filling the voids between particles; said sheath and said core being closely fitted to prevent said particles and said binder from being positioned therebetween except in said formed spaces.
Claim 11
Dependent Claim
39 words
A construction as defined in claim 1, and said member and its core being in the form of an elongated, approximately uniform cross-section rod, with the sheath being in the form of a thin wall approximately uniform diameter tube.
Claim 12
Dependent Claim
140 words
A saw and impact resistant member comprising: an elongated metal core having a first end and an outwardly tapered second end; said metal core having a plurality of longitudinal grooves of shallow depth extending radially inwardly from the outer surface thereof and extending radially inwardly from the outer surface thereof and extending from the first end of said core to approximately the beginning of the taper at said second end; a thin walled metal tube surrounding said core, said tube having a first end extending longitudinally beyond the first end of said core and having an outwardly tapered second end force fit onto the tapered second end of said core; and the grooves of said core being filled with a matrix formed of closely packed hard particles such as of metallic carbides and the like in a soft binder material.
Claim 13
Dependent Claim
140 words
A saw and impact resistant member comprising: an elongated metal core having a first end and an outwardly tapered second end; said metal core having a plurality of longitudinal grooves of shallow depth extending radially inwardly from the outer surface thereof and extending radially inwardly from the outer surface thereof and extending from the first end of said core to approximately the beginning of the taper at said second end; a thin walled metal tube surrounding said core, said tube having a first end extending longitudinally beyond the first end of said core and having an outwardly tapered second end force fit onto the tapered second end of said core; and the grooves of said core being filled with a matrix formed of closely packed hard particles such as of metallic carbides and the like in a soft binder material.
Claim 14
Dependent Claim
48 words
The construction as defined in claim 9 and further including a plug of said softer binder material above the first end of said metal core, said plug substantially filling the interior of said tube from said first end of said tube to said first end of said core.
Claim 15
Independent Claim
170 words
A method of making a saw and impact resistant bar-like member comprising the steps of: forming an elongated core having a first end and a second end with said core being tapered outwardly at said second end, said core having a plurality of spaced apart longitudinal surface grooves extending radially inwardly from the outer surface of said core, said grooves extending generally from said first end of said core and terminating in the region of said core where said taper commences; closely fitting a thin walled tube over said core, said tube having first end extending longitudinally beyond the first end of said core and having an outwardly tapered second end force fit onto the second tapered end of said core; filling said grooves in an endwise direction with a packing formed of particles of hard material such as hard metal carbide; and flowing a molten binder into said grooves to fill the spaces between the particles and solidifying the binder to form a solid matrix of particles and binder.
Claim 16
Independent Claim
170 words
A method of making a saw and impact resistant bar-like member comprising the steps of: forming an elongated core having a first end and a second end with said core being tapered outwardly at said second end, said core having a plurality of spaced apart longitudinal surface grooves extending radially inwardly from the outer surface of said core, said grooves extending generally from said first end of said core and terminating in the region of said core where said taper commences; closely fitting a thin walled tube over said core, said tube having first end extending longitudinally beyond the first end of said core and having an outwardly tapered second end force fit onto the second tapered end of said core; filling said grooves in an endwise direction with a packing formed of particles of hard material such as hard metal carbide; and flowing a molten binder into said grooves to fill the spaces between the particles and solidifying the binder to form a solid matrix of particles and binder.
Claim 17
Dependent Claim
82 words
The method as defined in claim 11, wherein said step of flowing inCludes flowing a molten binder into the tube above the first end of said core and solidifying said binder above said core during the solidifying of said binder in said grooves to form a solid matrix of particles and binder in said grooves and to form a solid plug of said binder material interiorly of said tube at the first end thereof and above the first end of said core.
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) | 1977-10-28 | 1978-04-29 | 1978-10-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-10-28 | 1982-04-29 | 1982-10-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-10-28 | 1986-04-29 | 1986-10-29 | $7700.00 | Window Closed / Lapsed |