Source: http://www.google.com/patents/US5219110?dq=7,117,286
Timestamp: 2016-12-04 19:04:39
Document Index: 199714812

Matched Legal Cases: ['art 9', 'art 10', 'art 9', 'art 9', 'art 9', 'art 9']

Patent US5219110 - Mechanism for adjusting driving depth of fasteners in fastener driving tool - Google PatentsSearch Images Maps Play YouTube News Gmail Drive More »Sign inPatentsA fastener driving tool includes a driver guide within which a driver is reciprocally moved to drive the fasteners, a contact arm vertically movable along the driver guide and having a lower end for abutment on a work, a control mechanism interlocked with the contact arm for controlling operation of...http://www.google.com/patents/US5219110?utm_source=gb-gplus-sharePatent US5219110 - Mechanism for adjusting driving depth of fasteners in fastener driving toolAdvanced Patent SearchTry the new Google Patents, with machine-classified Google Scholar results, and Japanese and South Korean patents.Publication numberUS5219110 APublication typeGrantApplication numberUS 07/946,901Publication dateJun 15, 1993Filing dateSep 18, 1992Priority dateSep 21, 1991Fee statusPaidPublication number07946901, 946901, US 5219110 A, US 5219110A, US-A-5219110, US5219110 A, US5219110AInventorsKenji MukoyamaOriginal AssigneeMakita CorporationExport CitationBiBTeX, EndNote, RefManPatent Citations (6), Referenced by (108), Classifications (7), Legal Events (4) External Links: USPTO, USPTO Assignment, EspacenetMechanism for adjusting driving depth of fasteners in fastener driving tool
US 5219110 AAbstract
A fastener driving tool includes a driver guide within which a driver is reciprocally moved to drive the fasteners, a contact arm vertically movable along the driver guide and having a lower end for abutment on a work, a control mechanism interlocked with the contact arm for controlling operation of the driver. A mechanism for adjusting driving depth of the fasteners includes a cam device interposed between an upper part and a lower part of the contact arm. The lower part has the lower end for abutting on the work. The cam device is operable by an operator for varying distance between the upper part and the lower part of the contact arm.
1. In a fastener driving tool including a driver guide within which a driver is reciprocally moved to drive the fasteners, a contact arm vertically movable along the driver guide and having a lower end for abutment on a work, a control mechanism interlocked with the contact arm for controlling operation of the driver;a mechanism for adjusting the driving depth of fasteners comprising cam means interposed between an upper part and a lower part of the contact arm, the lower part having said lower end for abutting on the work, and said cam means being operable by an operator for varying the distance between said upper part and said lower part of the contact arm, said cam means include a first cam member and a second cam member disposed in opposed relationship with each other and rotatable relative to each other; said first cam member and said second cam member include a first cam surface and a second cam surface, respectively; said first cam surface and said second cam surface are engageable with each other, the distance between an upper surface of said first cam member and a lower surface of said second cam member being variable according to rotation of said first and second cam member relative to each other; biasing means for biasing one of said first and said second cam member to engage said first and second cam surface and wherein said second cam surface is of annular configuration and includes a plurality of cam recesses having a different bottom height which gradually changes in a circumferential direction; said first cam surface is of convex configuration and is engageable with any of said cam recesses. 2. The mechanism as defined in claim 1 wherein said first cam member is integrally formed with the upper part of the contact arm; and said second cam member is rotatable around a support shaft mounted on the lower part of the contact arm.
It is, accordingly, an object of the present invention to provide a mechanism for adjusting driving depth of fasteners in a fastener driving tool which can be easily and reliably operated to adjust the driving depth.
FIG. 1 is a side view, with a part broken away, of a fastener driving tool including a mechanism for adjusting driving depth of fasteners according to an embodiment of the present invention;
Referring to FIG. 1, there is shown a fastener driving tool 1 including a driving depth adjusting mechanism according to an embodiment of the present invention. The fastener driving tool 1 is constructed to reciprocally move a piston (not shown) within a body 3 through a compressed air supplied from an air source. The piston is connected to a driver (not shown) movable along a driver guide track (not shown) formed in a driver guide 4 which is mounted on a lower portion of the body 3. The driver drives fasteners fed from a magazine 2 one after another. A handle 5 is connected to the central portion of the body 3 and extending substantially perpendicular to the body 3.
A mechanism 11 for adjusting driving depth of fasteners is provided between the lower part 9 and the upper part 10 and includes a cylindrical lower cam member 13. The lower cam member 13 is supported by a cylindrical support member 12 connected to the lower part 9 through a leg 9a which extends upwardly from the lower part 9 along the driver guide 4. The lower cam member 13 includes on its upper end surface a plurality of saw tooth-like cam recesses 13a formed in series in a circumferential direction. The cam recesses 13a are of substantially the same configuration but gradually change the level of their bottoms in a circumferential direction. The lower portion of the lower cam member 13 is slightly expanded outwardly to form a knob 13b for operation by the operator. Further, the lower cam member 13 has on its outer surface an indication of gauge corresponding to the level of the bottom of each of the cam recesses 13a. The inner wall of the support member 12 includes a pair of recesses 12a which are diametrically opposed to each other and which are opened at their upper and lower ends, respectively. The inner wall of the support member 12 further includes a pair of engaging recesses 12b which are diametrically opposed to each other and which have closed upper ends and opened lower ends, respectively. The engaging recesses 12b are displaced from the recesses 12a by an angle of about 90° in a circumferential direction. A support shaft 14 is slidably inserted into the support member 12 and the lower cam member 13. A pin 14a is fixed to the lower end of the support shaft 14 in a direction perpendicular to the axial direction of the support shaft 14. Both ends of the pin 14a extend radially outwardly from the support shaft 14. The pin 14a prevents the support shaft 14 from removing upwardly from the support member 12 when the ends of the pin 14a are engaged with the engaging recesses 12b. The pin 14a permits removal of the support shaft 14 from the support member 12 when the ends of the pin 14a are engaged with the recesses 12a through rotation of the support shaft 14 by an angle of about 90°. A knob 14b is mounted on an upper end of the support shaft 14 for operation of the support shaft 14. An O-ring 19 is mounted on the support shaft 14 to provide an appropriate frictional resistance between the support shaft 14 and the lower cam member 13.
Additionally, the support shaft 14 is prevented from removal from the support member 12 through engagement of the pin 14a with the engaging recesses 12b of the support member 12 while the support shaft 14 can be easily removed from the support member 12 through rotation by an angle of 90° so as to position the pin 14a to engage the recesses 12a. This may make it easy to disassemble or assemble various parts of the contact arm 8 for changing the lower part 9 to another one. Further, the lower part 9 can be changed without requiring change of the other parts.
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B25C1/00, B25C1/04Cooperative ClassificationB25C1/008European ClassificationB25C1/00DLegal EventsDateCodeEventDescriptionSep 18, 1992ASAssignmentOwner name: MAKITA CORPORATION, JAPANFree format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNOR:MUKOYAMA, KENJI;REEL/FRAME:006262/0895Effective date: 19920910Dec 10, 1996FPAYFee paymentYear of fee payment: 4Dec 12, 2000FPAYFee paymentYear of fee payment: 8Dec 15, 2004FPAYFee paymentYear of fee payment: 12RotateOriginal ImageGoogle Home - Sitemap - USPTO Bulk Downloads - Privacy Policy - Terms of Service - About Google Patents - Send FeedbackData provided by IFI CLAIMS Patent Services