US3680643A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fluid actuated tool having removable coil spring biasing means
Assignee: Nitto Kohki Co Ltd
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Filing: 1970-02-26
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Granted: 1972-08-01
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Expires: 1990-02-26
Abstract
Abstract A fluid actuated tool which utilizes a tubular sleeve that is formed independently of the internal tool elements. The tool includes a tubular sleeve, a cylinder mounted within said sleeve, a space between the sleeve and the cylinder being provided which is used as an air-passage, a piston inserted in the cylinder which reciprocates by the pressure imposed by incoming air from the air-passage, a receiving piece provided at the forward end of the sleeve, the receiving piece having a hammer, a needle chisel or other workpiece attached thereto and being moved in correspondence with the movements of the piston. A coil spring, which is removably retained within the sleeve by a projection or a removable cap element, biases the piston and receiving piece rearward.
Inventors
- 👤 William M Cameron
- 👤 Toshio Mikiya
- 👤 Mitsuma Matsumura
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 20:55
CPC Classifications
B; B21; B21J; B21J15/00; B21J15/10; B21J15/16; B21J15/18; B25; B25D; B25D17/00; B25D17/02; B25D17/08; B25D9/00; B25D9/06; B25D9/08; B25D2250/00; B25D2250/275; B25D2250/285; B25D2250/291; Y; Y10; Y10T; Y10T29/00; Y10T29/45; Y10T29/4572; Y10T29/4578
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
353 words
A fluid actuated tool comprising: a tool body including tubular sleeve (11) having a plurality of air outlet openings (10) communicating to the outside thereof; an air inlet for supplying pressurized supply fluid to the rearward end of the tool; a cylinder (14) having outlet openings (24) communicating with the air outlet openings (10) of said sleeve (11), and an annular recess (19) on the outer surface thereof, mounted within the rearward end of said sleeve (11), an air passage being formed by said recess (19) between the cylinder (14) and sleeve (11); a piston (13) slidably mounted in said cylinder (14) to reciprocate therein, an air cavity being formed between the rear of said piston and the rearward end of said tool body, said cavity being in communication with said air passage formed by said recess (19), said piston (13) having an air filling passage (36) formed therein substantially perpendicular to the longitudinal axis of said piston, said air filling passage (36) being selectively in communication with said air passage formed by said recess (19) as the piston (13) moves within said sleeve; an anvil (15) slideably mounted in said sleeve (11) and coupled to said piston (13) to reciprocate therewith; a receiving piece (16) slideably mounted in said sleeve (11) and coupled to said piston (13) for reciprocating in accordance with said piston reciprocation and for carrying a working element (37); a spring engaging recess formed at the forward end of said sleeve (11); and coil spring means (17) removably mounted within the forward end of said sleeve (11) to bias said receiving piece (16) rearward, said coil spring means (17) having a projection (39,41) removably engaging said spring engaging recess at said forward end of the sleeve; said air outlet openings in said cylinder (14) and sleeve (11) selectively communicating with the substantially perpendicular openings (36) of the piston (13) as the piston moves forward to relieve compressive pressure tending to move the pisTon forward with respect to said sleeve (11), said coil spring means (17) biasing said piston (13) and said receiving piece (16) rearward towards their rearmost position.
Claim 2
Dependent Claim
353 words
A fluid actuated tool comprising: a tool body including tubular sleeve (11) having a plurality of air outlet openings (10) communicating to the outside thereof; an air inlet for supplying pressurized supply fluid to the rearward end of the tool; a cylinder (14) having outlet openings (24) communicating with the air outlet openings (10) of said sleeve (11), and an annular recess (19) on the outer surface thereof, mounted within the rearward end of said sleeve (11), an air passage being formed by said recess (19) between the cylinder (14) and sleeve (11); a piston (13) slidably mounted in said cylinder (14) to reciprocate therein, an air cavity being formed between the rear of said piston and the rearward end of said tool body, said cavity being in communication with said air passage formed by said recess (19), said piston (13) having an air filling passage (36) formed therein substantially perpendicular to the longitudinal axis of said piston, said air filling passage (36) being selectively in communication with said air passage formed by said recess (19) as the piston (13) moves within said sleeve; an anvil (15) slideably mounted in said sleeve (11) and coupled to said piston (13) to reciprocate therewith; a receiving piece (16) slideably mounted in said sleeve (11) and coupled to said piston (13) for reciprocating in accordance with said piston reciprocation and for carrying a working element (37); a spring engaging recess formed at the forward end of said sleeve (11); and coil spring means (17) removably mounted within the forward end of said sleeve (11) to bias said receiving piece (16) rearward, said coil spring means (17) having a projection (39,41) removably engaging said spring engaging recess at said forward end of the sleeve; said air outlet openings in said cylinder (14) and sleeve (11) selectively communicating with the substantially perpendicular openings (36) of the piston (13) as the piston moves forward to relieve compressive pressure tending to move the pisTon forward with respect to said sleeve (11), said coil spring means (17) biasing said piston (13) and said receiving piece (16) rearward towards their rearmost position.
Claim 3
Dependent Claim
25 words
The fluid actuate tool of claim 1 wherein said spring engaging recess includes at least an opening formed through the wall of said cylinder (11).
Claim 4
Dependent Claim
46 words
The fluid actuate tool of claim 1 wherein said coil spring means (17) includes an oval shaped portion (42) having projection (41) formed at the end thereof, and said spring engaging recess includes a generally screw-thread shaped recess, said projection screwing to said generally screw-thread recess.
Claim 5
Dependent Claim
18 words
The fluid actuate tool of claim 3 wherein said oval shaped spring part guides said working element (37).
Claim 6
Dependent Claim
34 words
The fluid actuate tool of claim 1 wherein said spring means (17) includes an extension portion which is grippable for disengaging said spring means (17) from said spring engaging recess in said sleeve (11).
Claim 7
Dependent Claim
20 words
The fluid actuate tool of claim 1 including means (56) for attaching a grip means to said tubular sleeve (11).
Claim 8
Dependent Claim
342 words
A fluid actuated tool comprising: a tool body including tubular sleeve (11) having a plurality of air outlet openings (10) communicating to the outside thereof; an air inlet for supplying pressurized supply fluid to the rearward end of the tool; a cylinder (14) having outlet openings (24) communicating with the air outlet openings (10) of said sleeve (11), and an annular recess (19) on the outer surface thereof, mounted within the rearward end of said sleeve (11), an air passage being formed by said recess (19) between the cylinder (14) and sleeve (11); a piston (13) slidably mounted in said cylinder (14) to reciprocate therein, an air cavity being formed between the rear of said piston and the rearward end of said tool body, said cavity being in communication with said air passage formed by said recess (19), said piston (13) having an air filling passage (36) formed therein substantially perpendicular to the longitudinal axis of said piston, said air filling passage (36) being selectively in communication with said air passage formed by said recess (19) as the piston (13) moves within said sleeve; an anvil (15) slidably mounted in said sleeve (11) and coupled to said piston (13) to reciprocate therewith; a receiving piece (16) slideably mounted in said sleeve (11) and coupled to said piston (13) for reciprocating in accordance with said piston reciprocation and for carrying a working element (37); coil spring means (17) removably mounted within the forward end of said sleeve (11) to bias said receiving piece (16) rearward; and cap means (45) removably engaging the forward end of said sleeve (11) for removably retaining said coil spring means (17) within said sleeve (11); said air outlet openings in said cylinder (14) and sleeve (11) selectively communicating with the substantially perpendicular openings (36) of the piston (13) as the piston moves forward to relieve compressive pressure tending to move the piston forward with respect to said sleeve (11), said coil spring means (17) biasing said piston (13) and said receiving piece (16) rearward towards their rearmost position.
Claim 9
Dependent Claim
342 words
A fluid actuated tool comprising: a tool body including tubular sleeve (11) having a plurality of air outlet openings (10) communicating to the outside thereof; an air inlet for supplying pressurized supply fluid to the rearward end of the tool; a cylinder (14) having outlet openings (24) communicating with the air outlet openings (10) of said sleeve (11), and an annular recess (19) on the outer surface thereof, mounted within the rearward end of said sleeve (11), an air passage being formed by said recess (19) between the cylinder (14) and sleeve (11); a piston (13) slidably mounted in said cylinder (14) to reciprocate therein, an air cavity being formed between the rear of said piston and the rearward end of said tool body, said cavity being in communication with said air passage formed by said recess (19), said piston (13) having an air filling passage (36) formed therein substantially perpendicular to the longitudinal axis of said piston, said air filling passage (36) being selectively in communication with said air passage formed by said recess (19) as the piston (13) moves within said sleeve; an anvil (15) slidably mounted in said sleeve (11) and coupled to said piston (13) to reciprocate therewith; a receiving piece (16) slideably mounted in said sleeve (11) and coupled to said piston (13) for reciprocating in accordance with said piston reciprocation and for carrying a working element (37); coil spring means (17) removably mounted within the forward end of said sleeve (11) to bias said receiving piece (16) rearward; and cap means (45) removably engaging the forward end of said sleeve (11) for removably retaining said coil spring means (17) within said sleeve (11); said air outlet openings in said cylinder (14) and sleeve (11) selectively communicating with the substantially perpendicular openings (36) of the piston (13) as the piston moves forward to relieve compressive pressure tending to move the piston forward with respect to said sleeve (11), said coil spring means (17) biasing said piston (13) and said receiving piece (16) rearward towards their rearmost position.
Claim 10
Dependent Claim
33 words
The fluid actuate tool of claim 7 wherein said cap means (45) is generally ring-shaped, said working element (37) extending out from said tool through a central opening in said cap means (45).
Claim 11
Dependent Claim
33 words
The fluid actuate tool of claim 7 wherein said sleeve has a cap engaging recess (43) formed therein and said cap means (45) has a projection (44) engaging said cap engaging recess (43).
Claim 12
Dependent Claim
43 words
The fluid actuate tool of claim 9 wherein said cap engaging recess (43) is a circumferential re-entrant slot having an opening at the forward end of said sleeve (11), whereby said sleeve (11) and cap means (45) are removably and lockingly engaged 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) | 1975-08-01 | 1976-01-31 | 1976-08-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-08-01 | 1980-01-31 | 1980-08-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-08-01 | 1984-01-31 | 1984-08-01 | $7700.00 | Window Closed / Lapsed |