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US3594890A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Explosive actuated pulling apparatus
Assignee: Individual
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Filing: 1968-04-29
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Granted: 1971-07-27
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Expires: 1988-04-29
Abstract
Abstract An explosive powered apparatus for pulling bearings and the like, from within or on shafts. The apparatus includes a barrel having a breech adjacent one end in which an explosive is carried. A piston is carried within the barrel for relative movement therewith. A sleeve having threads thereon is threaded within one end of the barrel for restricting the movement of the piston when the explosive is detonated and for regulating the force applied. A retaining member is carried adjacent the freeend of the sleeve, and has arms extending out therefrom for engaging the bearing. When the explosive is detonated the freeend of the piston pushes against the end of the shaft upon which the bearing is carried causing the arms to pull the bearing longitudinally along the shaft, thus freeing it. When the bearing is carried within the shaft a plate is positioned between the end of the piston and the shaft for transferring the force from the piston to the shaft during the pulling operation.
Inventors
- 👤 Harold E Cordell
- 👤 Marion C Boyd
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 17:41
CPC Classifications
B; B25; B25B; B25B27/00; B25B27/02; B25B27/06; B25B27/064; B25B27/0085; F; F16; F16C; F16C35/00; F16C35/04; F16C35/06; F16C35/062; Y; Y10; Y10T; Y10T29/00; Y10T29/53; Y10T29/53796; Y10T29/53839; Y10T29/53843; Y10T29/53848; Y10T29/53857; Y10T29/53861; Y10T29/53865
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
303 words
An apparatus for pulling a bearing and the like from a shaft where such is carried in a pressure fit relationship comprising: a barrel having an elongated cylinder therein; a breech member adapted to receive an explosive charge carried adjacent one end of said barrel, a breech block and firing mechanism removably secured over the end of the breech member; threads carried on the inner wall of said cylinder adjacent the other end of said barrel; an elongated piston, said piston having a head adjacent one end received in a closely fitting relationship within said cylinder and a reduced portion adjacent the other end; said piston being positioned in said cylinder with said reduced portion extending out the open end thereof; a sleeve having threads on its surface screwed into the open end of said cylinder for regulating the longitudinal movement of said piston, said sleeve having a bore extending therethrough from an inner end to an outer end; said bore being of a larger diameter than said reduced portion on said piston and a smaller diameter than said head so that said reduced portion of said piston extends therethrough while the movement of said head is limited by the inner end of said sleeve; a retaining member carried in fixed relation to said barrel; arms extending out from said retaining member for engaging the bearing to be pulled; whereby said inner end of said reduced portion of said piston is placed flush against the end of the shaft which carries said bearing to be pulled so that when an explosive charge is placed in said breech and fired the expanding gas forces said piston against the end of said shaft producing relative movement between said barrel and said shaft, and said force can be regulated by rotating said sleeve within said cylinder.
Claim 2
Independent Claim
303 words
An apparatus for pulling a bearing and the like from a shaft where such is carried in a pressure fit relationship comprising: a barrel having an elongated cylinder therein; a breech member adapted to receive an explosive charge carried adjacent one end of said barrel, a breech block and firing mechanism removably secured over the end of the breech member; threads carried on the inner wall of said cylinder adjacent the other end of said barrel; an elongated piston, said piston having a head adjacent one end received in a closely fitting relationship within said cylinder and a reduced portion adjacent the other end; said piston being positioned in said cylinder with said reduced portion extending out the open end thereof; a sleeve having threads on its surface screwed into the open end of said cylinder for regulating the longitudinal movement of said piston, said sleeve having a bore extending therethrough from an inner end to an outer end; said bore being of a larger diameter than said reduced portion on said piston and a smaller diameter than said head so that said reduced portion of said piston extends therethrough while the movement of said head is limited by the inner end of said sleeve; a retaining member carried in fixed relation to said barrel; arms extending out from said retaining member for engaging the bearing to be pulled; whereby said inner end of said reduced portion of said piston is placed flush against the end of the shaft which carries said bearing to be pulled so that when an explosive charge is placed in said breech and fired the expanding gas forces said piston against the end of said shaft producing relative movement between said barrel and said shaft, and said force can be regulated by rotating said sleeve within said cylinder.
Claim 3
Dependent Claim
50 words
The apparatus as set forth in claim 1, wherein said sleeve can be rotated so as to vary the pulling force applied to said bearing and said sleeve having a shock absorbing member adjacent the inner end thereof for cushioning the shock imparted by said piston during the pulling operation.
Claim 4
Independent Claim
325 words
An apparatus for pulling a bearing and the like from a shaft where such is carried in a pressure fit relationship comprising: a barrel having an elongated cylinder therein; a breech member adapted to receive an explosive charge carried adjacent one end of said barrel, a breech block and firing mechanism removably secured over the end of the breech member; threads carried on the inner wall of said cylinder adjacent the other end of said barrel; an elongated piston, said piston having a head adjacent one end received in a closely fitting relationship within said cylinder and a reduced portion adjacent the other end; said piston being positioned in said cylinder with said reduced portion extending out the open end thereof; a sleeve having threads on its surface screwed into the open end of said cylinder for regulating the longitudinal movement of said piston, said sleeve having a bore extending therethrough from an inner end to an outer end; said bore being of a larger diameter than said reduced portion on said piston and a smaller diameter than said head so that said reduced portion of said piston extends therethrough while the movement of said head is limited by the inner end of saId sleeve; a retaining member carried in fixed relation to said barrel; arms extending out from said retaining member for engaging said bearing; a plate positioned adjacent an inner end of said piston, said plate having openings therein through which said arms extend when engaging said bearing so that when an internal bearing is being pulled said plate abuts against the end of said shaft and said arms extend into said shaft for engaging said bearing, whereby when an explosive charge is placed in said breech and fired the expanding gas forces said piston against the end of said shaft producing relative movement between said barrel and said shaft, and said force can be regulated by rotating said sleeve within said cylinder.
Claim 5
Independent Claim
325 words
An apparatus for pulling a bearing and the like from a shaft where such is carried in a pressure fit relationship comprising: a barrel having an elongated cylinder therein; a breech member adapted to receive an explosive charge carried adjacent one end of said barrel, a breech block and firing mechanism removably secured over the end of the breech member; threads carried on the inner wall of said cylinder adjacent the other end of said barrel; an elongated piston, said piston having a head adjacent one end received in a closely fitting relationship within said cylinder and a reduced portion adjacent the other end; said piston being positioned in said cylinder with said reduced portion extending out the open end thereof; a sleeve having threads on its surface screwed into the open end of said cylinder for regulating the longitudinal movement of said piston, said sleeve having a bore extending therethrough from an inner end to an outer end; said bore being of a larger diameter than said reduced portion on said piston and a smaller diameter than said head so that said reduced portion of said piston extends therethrough while the movement of said head is limited by the inner end of saId sleeve; a retaining member carried in fixed relation to said barrel; arms extending out from said retaining member for engaging said bearing; a plate positioned adjacent an inner end of said piston, said plate having openings therein through which said arms extend when engaging said bearing so that when an internal bearing is being pulled said plate abuts against the end of said shaft and said arms extend into said shaft for engaging said bearing, whereby when an explosive charge is placed in said breech and fired the expanding gas forces said piston against the end of said shaft producing relative movement between said barrel and said shaft, and said force can be regulated by rotating said sleeve within said cylinder.
Claim 6
Dependent Claim
67 words
The apparatus as set forth in claim 1, wherein the end of the enlarged portion of said piston is chamfered, said threads in said cylinder and on said sleeve being coarse providing a fluid permeable fitting so as to permit passage of said expanding gas after said bearing has been pulled in order to permit gradual leaking off of the pressure after said bearing has been pulled.
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) | 1974-07-26 | 1975-01-25 | 1975-07-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-07-26 | 1979-01-25 | 1979-07-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-07-26 | 1983-01-25 | 1983-07-27 | $7700.00 | Window Closed / Lapsed |