US3757875A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Air hammer and combined support and muffler therefor
Assignee: KENT AIR TOOL Co
•
Filing: 1971-11-24
•
Granted: 1973-09-11
•
Expires: 1991-11-24
Abstract
Abstract A support by which a reciprocating air hammer of the type having an elongated body or barrel is pivotally supported on the bucket supporting boom arm of a conventional power shovel, is modified to enclose the hammer body and to muffle the air percussively discharged from the hammer body.
Inventors
- 👤 S Gunning
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 04:25
CPC Classifications
B; B25; B25D; B25D17/00; B25D17/11; B25D17/12; E; E02; E02F; E02F3/00; E02F3/04; E02F3/96; E02F3/966; Y; Y10; Y10S; Y10S173/00; Y10S173/02
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
310 words
An air hammer including a rigid body having an exhaust port and adapted to support a tool at one end; a rigid elongated hollow muffler housing enclosing said body from a location near said one end of the body to a location near the other end of the body and secured to the body in fixed position relative thereto, and having a discharge opening spaced from said port; the peripheral wall of said housing being spaced from the body so as to provide an exhaust passage therebetween and affording communication between the opening and the port; means constraining the air discharged from the port to discharge through the opening; first connecting means on and rigid with the housing at said other end of the body and adapted for pivotally connecting the housing to a power driven movable support for rocking of the housing in a fixed path aboUt a predetermined axis extending transversely of the body and for transmitting heavy working load forces to the housing by the power driven movable support; second connecting means on the housing at said other end of the body and having a pivotal axis offset transversely from said predetermined axis, and adapted for pivotal connection to a reciprocable power device on the power driven support for rocking the housing about said pivotal axis by heavy working load forces applicable by the device independently of the movement of the movable support, when the housing is connected to said movable support; and said housing being sufficiently rigid and strong to transmit directly from each end of the housing to the other end of the housing both longitudinal and transverse heavy working load forces applied to the housing at the other end of the body through said first and second connecting means and to said one end of the housing through the tool end of the body.
Claim 2
Dependent Claim
310 words
An air hammer including a rigid body having an exhaust port and adapted to support a tool at one end; a rigid elongated hollow muffler housing enclosing said body from a location near said one end of the body to a location near the other end of the body and secured to the body in fixed position relative thereto, and having a discharge opening spaced from said port; the peripheral wall of said housing being spaced from the body so as to provide an exhaust passage therebetween and affording communication between the opening and the port; means constraining the air discharged from the port to discharge through the opening; first connecting means on and rigid with the housing at said other end of the body and adapted for pivotally connecting the housing to a power driven movable support for rocking of the housing in a fixed path aboUt a predetermined axis extending transversely of the body and for transmitting heavy working load forces to the housing by the power driven movable support; second connecting means on the housing at said other end of the body and having a pivotal axis offset transversely from said predetermined axis, and adapted for pivotal connection to a reciprocable power device on the power driven support for rocking the housing about said pivotal axis by heavy working load forces applicable by the device independently of the movement of the movable support, when the housing is connected to said movable support; and said housing being sufficiently rigid and strong to transmit directly from each end of the housing to the other end of the housing both longitudinal and transverse heavy working load forces applied to the housing at the other end of the body through said first and second connecting means and to said one end of the housing through the tool end of the body.
Claim 3
Dependent Claim
40 words
The structure according to claim 1, wherein baffle means are provided in the housing between the exhaust port and discharge opening for reducing the percussive blast of the air discharged from said port before the air reaches said discharge opening.
Claim 4
Dependent Claim
66 words
The structure according to claim 2 wherein said baffle means comprise a sheet of metal extending transversely of, and surrounding, the body at a predetermined location, and blocking the major portion of the cross section of said passage at said location, and having an outer peripheral edge portion spaced from the wall of the housing and providing a passage between said edge portion and said wall.
Claim 5
Dependent Claim
123 words
The structure according to claim 1 wherein the housing has side walls which are rigid supporting plates, respectively, and each of which is connected at its opposite ends to the opposite ends of the body for supporting the body by, and in fixed relation to, the plates; a movable support is pivotally connected to the plates by said first connecting means; power driven means are carried by the movable support and are pivotally connected to the plates by said second connecting means; and said plates are disposed at opposite sides of the body, respectively, and are capable in and of themselves of transmitting said heavy working load forces directly from said other end of the body to said one end of the body.
Claim 6
Dependent Claim
66 words
The structure according to claim 1 wherein the muffler housing includes two strong rigid working load forces transmitting supporting plates disposed at opposite sides of the body, respectively; each plate is rigidly connected to the body near opposite ends of the body, respectively; said first connecting means are on, and rigid with said plates; and said second connecting means are on and rigid with said plates.
Claim 7
Dependent Claim
86 words
The structure according to claim 1 wherein the end of the body opposite from said one end is a block rigidly connected to, and in supporting relation to, the remainder of the body; the muffler housing includes two rigid, heavy working load force transmitting and supporting plates extending alongside opposite sides of the body from said block toward said one end of the body; means fixedly secure the plates to the block; and additional means secure the plates to the body near the said one end.
Claim 8
Dependent Claim
164 words
The structure according to claim 1 wherein a power driven movable support is provided; the muffler housing is rigidly fixedly connected to the body at the opposite ends of the body, respectively, and supports the body; the first connecting means secures one end of the housing to the movable support and supports the housing for movement with the movable support, and for rocking relative to the movable support about the pivotal axis to different working positions relative to the movable support; whereby the working forces applied by the support to the tool is transmitted through the housing from one end of the body to the other end of the body without subjecting the body between its ends to said forces; anD power means are mounted on the movable support and connected to the housing so as to be operable to manipulate the housing and thereby the hammer, to different positions relative to the power driven movable support and against the work with working force.
Claim 9
Dependent Claim
264 words
A pneumatic hammer including an elongated rigid body adapted to support a tool at one end; a pair of rigid supporting plates arranged alongside opposite sides of the body; means securing each plate fixedly to the body at the opposite ends of the body, respectively; a first connecting means on and rigid with the plates at the other end of the body and adapted for pivotally connecting the plates to a movable power driven support for rocking as a unit, with the body, about a predetermined axis extending transversely of the body, and operative to transmit directly to the plates at said other end of the body any heavy working load forces imposed by the movable support; second means on, and rigid with, the plates at said other end of the body and offset transversely from said predetermined axis and adapted for pivotal connection to a reciprocable power device on said support for rocking the plates and body as a unit about an axis offset from said predetermined axis and operative to transmit heavy working load forces from said reciprocable power device directly to the plates at said other end of the body; and said plates, when secured to the body, in and of themselves, being sufficiently rigid and strong to transmit directly from each end of the plates to the other end of the plates, both longitudinal and transverse heavy working load forces applied to the plates at said other end through the first and second connecting means, and to said one end of the plates through said tool end of the body.
Claim 10
Dependent Claim
264 words
A pneumatic hammer including an elongated rigid body adapted to support a tool at one end; a pair of rigid supporting plates arranged alongside opposite sides of the body; means securing each plate fixedly to the body at the opposite ends of the body, respectively; a first connecting means on and rigid with the plates at the other end of the body and adapted for pivotally connecting the plates to a movable power driven support for rocking as a unit, with the body, about a predetermined axis extending transversely of the body, and operative to transmit directly to the plates at said other end of the body any heavy working load forces imposed by the movable support; second means on, and rigid with, the plates at said other end of the body and offset transversely from said predetermined axis and adapted for pivotal connection to a reciprocable power device on said support for rocking the plates and body as a unit about an axis offset from said predetermined axis and operative to transmit heavy working load forces from said reciprocable power device directly to the plates at said other end of the body; and said plates, when secured to the body, in and of themselves, being sufficiently rigid and strong to transmit directly from each end of the plates to the other end of the plates, both longitudinal and transverse heavy working load forces applied to the plates at said other end through the first and second connecting means, and to said one end of the plates through said tool end of the body.
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) | 1976-09-10 | 1977-03-12 | 1977-09-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-09-10 | 1981-03-12 | 1981-09-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-09-10 | 1985-03-12 | 1985-09-11 | $7700.00 | Window Closed / Lapsed |