US3807804A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Impacting tool with tungsten carbide insert tip
Assignee: EAGLE SIGNAL CONTROLS CORP A CORP OF DE
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Filing: 1972-09-12
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Granted: 1974-04-30
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Expires: 1992-09-12
Abstract
Abstract An impacting tool in which a massive hard carbide element is fitted to a steel holder which is reciprocated to drive the element against a formation to be broken. The massive carbide element can be press fitted in the steel holder or shrink fitted therein or brazed thereto and, furthermore, the carbide element can be fitted to a steel sleeve adapted for being secured to a steel holder as by threading or brazing.
Inventors
- 👤 T Kniff
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 13:59
CPC Classifications
B; B25; B25D; B25D17/00; B25D17/02
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
78 words
In an impacting tool; steel holder means, a blind cylindrical bore extending into said holder means from the working end thereof, and an impact member in the form of a single cylindrical piece of cemented hard metal carbide material fixed in said bore and having a pointed end protruding from the working end of said holder means, the axially inner end of said impact member bearing directly on the bottom of said bore in load transmitting relation thereto.
Claim 2
Dependent Claim
78 words
In an impacting tool; steel holder means, a blind cylindrical bore extending into said holder means from the working end thereof, and an impact member in the form of a single cylindrical piece of cemented hard metal carbide material fixed in said bore and having a pointed end protruding from the working end of said holder means, the axially inner end of said impact member bearing directly on the bottom of said bore in load transmitting relation thereto.
Claim 3
Dependent Claim
15 words
An impacting tool according to claim 1 in which said material comprises cemented tungsten carbide.
Claim 4
Dependent Claim
17 words
An impacting tool according to claim 1 in which said impact member is brazed in said bore.
Claim 5
Dependent Claim
17 words
An impacting tool according to claim 1 in which said impact member is cemented in said bore.
Claim 6
Dependent Claim
37 words
An impacting tool according to claim 1 in which the pointed outer end of said member comprises a first portion at the point having a wide angle and a second portion adjacent thereto having a narrow angle.
Claim 7
Dependent Claim
18 words
An impacting tool according to claim 1 in which said impact member is press fitted into said bore.
Claim 8
Dependent Claim
33 words
An impacting tool according to claim 6 in which said bore has an undercut at the bottom to receive any shavings taken by said impact member when it is pressed into said bore.
Claim 9
Dependent Claim
41 words
An impacting tool according to claim 6 in which said impact member has a tenon formed on the end in said bore to provide a space to receive any shavings taken by said member when it is pressed into said bore.
Claim 10
Dependent Claim
46 words
An impacting tool according to claim 1 in which said holder means comprises a first axial portion at the working end through which said bore extends, and a second axial portion connected to said first portion and having a region forming the bottom of said bore.
Claim 11
Dependent Claim
15 words
An impacting tool according to claim 9 in which said portions are connected by welding.
Claim 12
Dependent Claim
14 words
An impacting tool according to claim 9 in which said portions are threaded together.
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) | 1977-04-29 | 1977-10-29 | 1978-04-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-04-29 | 1981-10-29 | 1982-04-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-04-29 | 1985-10-29 | 1986-04-30 | $7700.00 | Window Closed / Lapsed |