GB1252796A - - Google Patents
Info
- Publication number
- GB1252796A GB1252796A GB1252796DA GB1252796A GB 1252796 A GB1252796 A GB 1252796A GB 1252796D A GB1252796D A GB 1252796DA GB 1252796 A GB1252796 A GB 1252796A
- Authority
- GB
- United Kingdom
- Prior art keywords
- piston
- compressed air
- valve
- annular chamber
- ring
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
- B25C—HAND-HELD NAILING OR STAPLING TOOLS; MANUALLY OPERATED PORTABLE STAPLING TOOLS
- B25C1/00—Hand-held nailing tools; Nail feeding devices
- B25C1/04—Hand-held nailing tools; Nail feeding devices operated by fluid pressure, e.g. by air pressure
- B25C1/041—Hand-held nailing tools; Nail feeding devices operated by fluid pressure, e.g. by air pressure with fixed main cylinder
Landscapes
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Portable Nailing Machines And Staplers (AREA)
- Actuator (AREA)
Abstract
1,252,796. Piston return devices in stapling machines &c. SIGNODE CORP. 27 May, 1969 [27 May, 1968], No. 26680/69. Heading B4C. In a pneumatically operated device e.g. a stapling machine, a piston 36, Fig. 1, is driven by compressed air, controlled by a spool valve 90, in a cylinder 34 connected by holes 63 with an annular chamber 62. This chamber is for containing compressed air to return the piston 36 when the space 82 above the piston is relieved by the valve 90. The spool valve 90, in the position shown in Fig. 1, closes the space 82 above the piston 36 from the compressed air in air inlet chamber 84, and connects the space 82 with the atmosphere through an outlet 112. The valve 90 is lowered by the differential action of the compressed air in the inlet chamber 84 whilst a ball valve 120 is held in its uppermost position by a trigger 110 to cut off the space 94 below the spool valve 90 from the compressed air. In its lower position the valve 90 closes the outlet 112 and allows compressed air to enter the space 82 causing the piston 36 and driver 38 to perform its drive stroke. Different embodiments comprise different constructions allowing the compressed air to enter the annular chamber 62. The piston 36 and annular chamber 62 have 0-rings 60, 70 mounted in grooves, either of which 0-rings may have notches cut out of its lower face, Fig. 6 (not shown), or may have projections on its lower face, Fig. 8 (not shown). These constructions allow compressed air to leak past the O- ring when it is resting on the lower edge of its grooves. In an embodiment in which the piston 0-ring has the notched construction, compressed air can leak past the piston 36 and into the annular chamber 62 during the downward stroke and whilst it is stationary at the bottom of the cylinder 34. However when the piston is returned by the compressed air below the piston and in the annular chamber 62 the O-ring 70 then abuts the upper edge of its groove. Channels 130, 132 are provided to remove any residual compressed air below the piston when at the upper end of the cylinder 34. In an embodiment in which the annular chamber O-ring has the notched construction, Fig. 11, compressed air passes through passages 332, 333, and around the O-ring 270 during the downward stroke of the piston and whilst it is stationary at the bottom of the cylinder. However the annular chamber is sealed when the pressure above the piston and 0-ring 270 is relieved. In a further embodiment, a passage (523), Fig. 12 (not shown), connects the annular chamber 62 with the inlet chamber 84 when the valve 90 is in its lower position, and is shut off from the compressed air when the valve 90 is in its upper position.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US73244168A | 1968-05-27 | 1968-05-27 |
Publications (1)
Publication Number | Publication Date |
---|---|
GB1252796A true GB1252796A (en) | 1971-11-10 |
Family
ID=24943517
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB1252796D Expired GB1252796A (en) | 1968-05-27 | 1969-05-27 |
Country Status (10)
Country | Link |
---|---|
US (1) | US3552274A (en) |
JP (1) | JPS4835988B1 (en) |
CH (1) | CH502166A (en) |
DE (2) | DE6921203U (en) |
DK (1) | DK136636B (en) |
ES (1) | ES367756A1 (en) |
FR (1) | FR2043670A1 (en) |
GB (1) | GB1252796A (en) |
NL (1) | NL6908056A (en) |
SE (1) | SE374507B (en) |
Families Citing this family (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2224016C2 (en) * | 1972-05-17 | 1974-03-28 | Dieter Haubold Industrielle Nagelgeraete, 3005 Hemmingen-Westerfeld | Release protection on a pneumatic nailer |
JPS5338188U (en) * | 1976-09-03 | 1978-04-04 | ||
US4932480A (en) * | 1988-12-16 | 1990-06-12 | Illinois Tool Works Inc. | Driving tool with air-cooled bumper |
SE509643C2 (en) * | 1996-03-06 | 1999-02-15 | Pos Line Ab | Single acting pneumatic piston-cylinder unit |
JP5800748B2 (en) * | 2012-04-09 | 2015-10-28 | 株式会社マキタ | Driving tool |
JP5758841B2 (en) | 2012-05-08 | 2015-08-05 | 株式会社マキタ | Driving tool |
JP2014091196A (en) | 2012-11-05 | 2014-05-19 | Makita Corp | Driving tool |
US9527196B2 (en) | 2013-11-06 | 2016-12-27 | Illinois Tool Works Inc. | Fastener driving tool with an automatic nose chamber guide member |
JP6100680B2 (en) | 2013-12-11 | 2017-03-22 | 株式会社マキタ | Driving tool |
JP6284417B2 (en) | 2014-04-16 | 2018-02-28 | 株式会社マキタ | Driving tool |
Family Cites Families (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2703558A (en) * | 1951-08-30 | 1955-03-08 | Modern Products Inc | Pressure return cylinder and piston unit |
US3229589A (en) * | 1964-12-07 | 1966-01-18 | Signode Corp | Impact tool and pneumatic piston return system therefor |
US3313213A (en) * | 1965-05-20 | 1967-04-11 | Fastener Corp | Fastener driving tool |
US3363517A (en) * | 1965-09-16 | 1968-01-16 | Powers Wire Products Co Inc | Air return percussive tool |
US3329068A (en) * | 1966-04-15 | 1967-07-04 | Signode Corp | Pneumatic piston return system for impact tools |
DE1301767B (en) * | 1967-01-28 | 1969-08-21 | Behrens Friedrich Joh | Ventilation device for the cylinder space on the foot side of a compressed air operated piston drive for stapling or nailing devices |
-
1968
- 1968-05-27 US US732441A patent/US3552274A/en not_active Expired - Lifetime
-
1969
- 1969-05-20 SE SE6907121A patent/SE374507B/xx unknown
- 1969-05-27 CH CH800269A patent/CH502166A/en not_active IP Right Cessation
- 1969-05-27 DE DE6921203U patent/DE6921203U/en not_active Expired
- 1969-05-27 GB GB1252796D patent/GB1252796A/en not_active Expired
- 1969-05-27 NL NL6908056A patent/NL6908056A/xx unknown
- 1969-05-27 JP JP44040708A patent/JPS4835988B1/ja active Pending
- 1969-05-27 DE DE19691926834 patent/DE1926834A1/en active Pending
- 1969-05-27 ES ES367756A patent/ES367756A1/en not_active Expired
- 1969-05-27 DK DK286369AA patent/DK136636B/en not_active IP Right Cessation
- 1969-05-27 FR FR6917273A patent/FR2043670A1/fr active Pending
Also Published As
Publication number | Publication date |
---|---|
DE1926834A1 (en) | 1970-01-15 |
FR2043670A1 (en) | 1971-02-19 |
NL6908056A (en) | 1969-12-01 |
SE374507B (en) | 1975-03-10 |
DK136636C (en) | 1978-03-20 |
CH502166A (en) | 1971-01-31 |
US3552274A (en) | 1971-01-05 |
DE6921203U (en) | 1973-09-27 |
JPS4835988B1 (en) | 1973-10-31 |
ES367756A1 (en) | 1971-04-16 |
DK136636B (en) | 1977-11-07 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
PS | Patent sealed [section 19, patents act 1949] | ||
PCNP | Patent ceased through non-payment of renewal fee |