US3735824A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Arrangements in and relating to a chiselling hammer or similar percussion machine
Assignee: Devac AB
•
Filing: 1971-03-03
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Granted: 1973-05-29
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Expires: 1991-03-03
Abstract
Abstract A chiselling hammer or similar percussion machine, having a pneumatic impact creating and/or vibration generating motor, a motor housing made of a vibration damping material, and a cutting tool provided with a casing structure also made of a vibration damping material and adapted for accommodation in a tool insert opening arranged in connection with the motor housing. Extending from one end of the casing structure to the other is at least one channel which forms a communicating passage between the working zone of the tool and an open through-flow passage within the machine housing proper.
Inventors
- 👤 N O Bromma Astrom
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 15:53
CPC Classifications
B; B23; B23Q; B23Q11/00; B23Q11/0042; B23Q11/0046; B23Q1/00; B23Q1/01; B23Q1/015; B25; B25D; B25D17/00; B25D17/04; B25D17/046; B25D17/11; B25D17/24; B25D9/00; B25D9/06; B25D9/08
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
181 words
A percussion machine comprising a pneumatic motor means for generating impact or vibration, a tool coupled to said motor means for being axially driven thereby, a relatively rigid machine housing constructed of an elastic or resilient material detachably supporting said motor means, said machine housing being provided with free through-flow passages extending in the longitudinal direction of said housing, said housing having an outlet for said passages adapted for connection at one end thereof with a source of low pressure and an opening at the other end thereof in which said tool can be received, said tool including an enveloping casing constructed of vibration damping material with is traversed from end to end along the tool by at least one through-flow passage which forms, in the position of use of the tool, a communicating passage between the working zone of the tool and the free through-flow passage in the machine housing, the dimensions of the opening in the housing for the tool being such as to provide a clearance around the tool when the tool is inserted in the machine housing.
Claim 2
Dependent Claim
181 words
A percussion machine comprising a pneumatic motor means for generating impact or vibration, a tool coupled to said motor means for being axially driven thereby, a relatively rigid machine housing constructed of an elastic or resilient material detachably supporting said motor means, said machine housing being provided with free through-flow passages extending in the longitudinal direction of said housing, said housing having an outlet for said passages adapted for connection at one end thereof with a source of low pressure and an opening at the other end thereof in which said tool can be received, said tool including an enveloping casing constructed of vibration damping material with is traversed from end to end along the tool by at least one through-flow passage which forms, in the position of use of the tool, a communicating passage between the working zone of the tool and the free through-flow passage in the machine housing, the dimensions of the opening in the housing for the tool being such as to provide a clearance around the tool when the tool is inserted in the machine housing.
Claim 3
Dependent Claim
45 words
A machine according to claim 1 wherein the opening of the machine housing for the cutting tool is surrounded by a collar arranged to receive the tools, said collar being constituted as a connecting piece which is capable of being attached to the machine housing.
Claim 4
Dependent Claim
32 words
A machine according to claim 1 wherein the machine housing is made in one piece and provided with at least one opening for inserting working parts of the machine into said housing.
Claim 5
Dependent Claim
39 words
A machine according to claim 1 wherein said motor means is so mounted in said housing to provide at least one air gap which forms a through passage which communicates with the free through-flow passages of the machine housing.
Claim 6
Dependent Claim
34 words
A machine according to claim 4 wherein said motor means has an air outlet opening discharging into the through-flow passages in the machine housing in a direction towards said outlet of the machine housing.
Claim 7
Dependent Claim
29 words
A machine according to claim 1 wherein said tool includes a tool member and a casing with integral longitudinally and substantially radially extending flanges which engage the tool member.
Claim 8
Dependent Claim
25 words
A machine according to claim 6 comprising a sleeve of vibration damping material located in immediate contact with the tool member and supporting said flanges.
Claim 9
Dependent Claim
19 words
A machine according to claim 6 wherein said casing of vibration damping material is fixed to the tool member.
Claim 10
Dependent Claim
37 words
A machine according to claim 6 whereiN the tool member and casing are provided with longitudinally extending, interengaging guide means which prevent relative rotation of the casing and tool member about the axis of said tool member.
Claim 11
Dependent Claim
48 words
A machine according to claim 6 wherein both the casing of vibration damping material surrounding the tool member and the tool member itself are capable of moving in relation to each other and comprising stop means for limiting movement of the casing with respect to the machine housing.
Claim 12
Dependent Claim
13 words
A machine according to claim 10 wherein said stop means comprises abutment surfaces.
References Cited (Backward Citations)
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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) | 1976-05-28 | 1976-11-27 | 1977-05-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-05-28 | 1980-11-27 | 1981-05-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-05-28 | 1984-11-27 | 1985-05-29 | $7700.00 | Window Closed / Lapsed |