US Patent No: 7,278,561
Number of patents in Portfolio can not be more than 2000
Oil free head valve for pneumatic nailers and staplers
Stats
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Oct 9, 2007
Issued date -
Feb 22, 2005
filing date -
11/063,646
serial no -
In Force
status
Importance
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Abstract
The present invention provides a head valve assembly for a pneumatic fastener including a piston assembly reciprocated within a cylinder assembly for driving a fastener and a housing having an end cap for at least partially enclosing the head valve assembly. The head valve assembly includes a valve piston for causing supply pressure to be ported to the piston assembly for moving the piston assembly within the cylinder assembly from a non-actuated position to an actuated position for driving the fastener. Further, an inner cap is disposed within the end cap around the valve piston. The inner cap includes an inlet port for porting pressure to the valve piston. In addition, a main seal is coupled to the valve piston for sealing the cylinder assembly from supply pressure while pressure is ported to the valve piston by the inner cap for holding the piston assembly in the non-actuated position. The main seal seals pressure ported to the valve piston by the inner cap from supply pressure ported to the piston assembly.
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First Claim
Related Publications
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International Classification(s)
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- [Patents Count]
Cited Art
| Patent Info | (Count) | # Cites | Year |
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| D353664 Portable pneumatic nailer | 21 | 1993 | |
| 5,476,205 Make and break head valve assembly | 21 | 1994 | |
| 5,829,660 Automatic-type fastener driving device | 17 | 1995 | |
| D383657 Fastener driving device housing | 22 | 1996 | |
| 5,850,961 Quick exhaust remote trigger valve for fastener driving tool | 20 | 1997 | |
| 6,039,231 Adjustable energy control valve for a fastener driving device | 22 | 1997 | |
| 6,079,605 Quick exhaust remote trigger valve for fastener driving tool | 9 | 1998 | |
| D433908 Portable pneumatic fastener driving device housing | 9 | 1999 | |
| 6,186,386 Fastener driving device with enhanced depth adjusting assembly | 54 | 2000 | |
| 6,189,759 Fastener driving device with enhanced magazine latch assembly | 32 | 2000 | |
| 6,371,348 Fastener driving device with enhanced sequential actuation | 38 | 2000 | |
| 6,783,044 Depth of drive adjustment for a fastener driving tool with removable contact member and method of exchanging contact members | 20 | 2003 | |
| 6,854,631 Pneumatic tool with self-sealing diaphragm valve system | 6 | 2003 | |
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| 5,110,030 Pneumatic fastener driving tool having an air exhaust arrangement | 38 | 1991 | |
| 5,217,153 Driving machine having cylinder fixing arrangement | 12 | 1992 | |
| 5,647,525 Driver blade for a percussion tool | 15 | 1995 | |
| 5,720,422 Staple tacker with a striking nose and a staple magazine | 32 | 1996 | |
| 5,725,142 Pneumatic fastener driving tool having air exhaust arrangement | 14 | 1996 | |
| 5,873,510 Repetitive striking type pneumatically operated nail gun | 38 | 1997 | |
| 5,927,584 Pneumatic fastener driving tool having air exhaust arrangement | 20 | 1998 | |
| 6,220,496 Nailing machine | 12 | 2000 | |
| 6,572,000 Driving tool | 11 | 2000 | |
| 6,394,332 Nail gun with safety portion mechanism for preventing misfires | 14 | 2001 | |
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| 4,294,391 Fastener driving tool | 17 | 1979 | |
| 4,401,251 Bumperless gun nailer | 37 | 1980 | |
| 4,784,308 Fastener driving tool | 42 | 1986 | |
| 4,932,480 Driving tool with air-cooled bumper | 56 | 1988 | |
| 5,273,200 Fastener driving tool | 17 | 1992 | |
| 5,261,587 Fastener-driving tool with improved, adjustable, tool-actuating structures | 61 | 1993 | |
| 5,452,835 Positioning mechanism for powered fastener-driving tool | 52 | 1995 | |
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| 5,881,941 Stapler having a silencer | 20 | 1997 | |
| 6,024,269 Cylinder inlet valve for a power stapler | 16 | 1999 | |
| 6,173,963 Sealing assembly for an inlet valve of a power nailer | 17 | 1999 | |
| 6,059,166 Exhausted air dispensing device for a power nailer | 24 | 1999 | |
| 6,059,167 End base of a power stapler | 15 | 1999 | |
| 6,626,081 Air-seal structure for pneumatic nailers | 12 | 2002 | |
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| D379912 Pneumatic coil nailer | 30 | 1996 | |
| 5,732,870 Pneumatic fastener driving tool and an electronic control system therefor | 42 | 1997 | |
| 6,382,492 Pneumatic fastener driving tool and an electric control system therefore | 25 | 1999 | |
| 6,431,425 Pneumatic fastener driving tool and an electronic control system therefore | 93 | 2000 | |
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| D435769 Pneumatic fastener driver | 27 | 1999 | |
| D442453 Cap for a pneumatic fastener driver | 6 | 1999 | |
| 6,648,202 Pneumatic fastening tool | 19 | 2002 | |
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| 5,131,579 Nailing machine | 32 | 1991 | |
| 5,437,339 Air-pressure-operated implusion mechanism | 30 | 1993 | |
| 5,637,125 Air filter assembly for pneumatic tool | 13 | 1995 | |
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| 4,986,164 Pneumatic gun having improved firing valve | 14 | 1989 | |
| 5,918,788 Pneumatic fastener driving tool and an electronic control system therefor | 50 | 1998 | |
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| 5,020,712 Pneumatic powered fastener device | 32 | 1989 | |
| 5,207,143 Pneumatic fastener driving apparatus with an improved valve | 27 | 1991 | |
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| 6,431,046 Pneumatic motor | 6 | 2000 | |
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| 6,087,436 Solvent resistant refinish paint composition and method of applying same | 8 | 1995 | |
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| 6,041,992 Portable device for inserting into predetermined seats in a body, such as an item of furniture, fixing and/or support elements for load-bearing members associated with said body, such as support feet for the item of furniture | 21 | 1998 | |
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| 5,706,996 Stapler gas exhaust system | 11 | 1997 | |
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| 5,671,880 Compressed-air nail firing tool with head valve, operating with single and repeat firing | 29 | 1996 | |
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| 5,014,898 Pneumatically operated fastener driving implement | 27 | 1989 | |
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| 6,145,727 Pneumatic tool | 28 | 1999 | |
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| 5,259,465 Filter for a pneumatic tool | 43 | 1992 | |
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| 5,025,971 Annular cushioning buffer for fastener-driving tools | 34 | 1989 | |
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| 6,443,348 Palm nailer with magazine | 15 | 2000 | |
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| 6,095,392 Pneumatic nailer including safety trigger for disabling/enabling operation | 20 | 1999 | |
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| 4,480,528 Trigger valve for pneumatic nailing machine | 20 | 1983 | |
| 5,709,332 Nail driving system | 17 | 1995 | |
| D463964 Head cap for hand carry air tacker | 6 | 2000 | |
Patent Citation Ranking
Maintenance Fees
| Fee | Large entity fee | small entity fee | micro entity fee | due date |
|---|---|---|---|---|
| 7.5 Year Payment | $3600.00 | $1800.00 | $900.00 | Apr 9, 2015 |
| 11.5 Year Payment | $7400.00 | $3700.00 | $1850.00 | Apr 9, 2019 |
| Fee | Large entity fee | small entity fee | micro entity fee |
|---|---|---|---|
| Surcharge - 7.5 year - Late payment within 6 months | $160.00 | $80.00 | $40.00 |
| Surcharge - 11.5 year - Late payment within 6 months | $160.00 | $80.00 | $40.00 |
| Surcharge after expiration - Late payment is unavoidable | $700.00 | $350.00 | $175.00 |
| Surcharge after expiration - Late payment is unintentional | $1,640.00 | $820.00 | $410.00 |