US5870933A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Advance mechanism for collated screwdriver
Assignee: Simpson Strong Tie Co Inc
•
Filing: 1996-12-23
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Granted: 1999-02-16
•
Expires: 2016-12-23
Abstract
Abstract A driver attachment for driving screws in a collated screwstrip. The attachment having a housing and a slide body slidable axially relative to the housing with the slide body carrying a shuttle slidable transversely relative the slide body. A lever is coupled at one end to the housing and at another end to the shuttle such that reciprocal movement of the housing and slide body axially reciprocally cycles the shuttle transversely. The slide body preferably carries a bearing member which when the slide body approaches a fully extended postion, engages the lever to assist the lever in drawing the shuttle inwardly to advance the screwstrip.
Inventors
- 👤 G. Lyle Habermehl
- 👤 Paul Townsend Scherer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 19:33
CPC Classifications
F; F16; F16B; F16B25/00; B; B25; B25B; B25B23/00; B25B23/02; B25B23/04; B25B23/045; F16B27/00
Claims Analysis
Total Claims: 19
Claim 1
Independent Claim
261 words
An apparatus for driving with a power driver a screwstrip comprising threaded fasteners, such as screws or the like, which are joined together in a strip comprising: a housing; an elongate driver shaft for operative connection to a power driver for rotation thereby and defining a longitudinal axis; a slide body coupled to the housing for displacement parallel to the axis of the driver shaft between an extended position and a retracted position; the slide body having a guide channel for said screwstrip transverse to the axis, a shuttle carried on the slide body movable relative the slide body transverse to the axis towards and away from the axis, the shuttle carrying an advance pawl for engagement with the screwstrip to advance the screwstrip with movement of the shuttle towards the axis to place successive of the fasteners into axial alignment with the driver shaft for driving by the driver shaft, a lever having a first end coupled to the shuttle and a second end coupled to the housing whereby movement of the slide body axially relative the housing (a) towards the extended position moves the shuttle towards the axis and (b) away from the extended position moves the shuttle away from the axis, a bearing member on the slide body which engages the lever intermediate the first end and the second end of the lever when the slide body is proximate the extended postion such that when the slide body moves axially towards the extended position, the bearing member urges the lever to assist moving the shuttle towards the axis.
Claim 2
Independent Claim
261 words
An apparatus for driving with a power driver a screwstrip comprising threaded fasteners, such as screws or the like, which are joined together in a strip comprising: a housing; an elongate driver shaft for operative connection to a power driver for rotation thereby and defining a longitudinal axis; a slide body coupled to the housing for displacement parallel to the axis of the driver shaft between an extended position and a retracted position; the slide body having a guide channel for said screwstrip transverse to the axis, a shuttle carried on the slide body movable relative the slide body transverse to the axis towards and away from the axis, the shuttle carrying an advance pawl for engagement with the screwstrip to advance the screwstrip with movement of the shuttle towards the axis to place successive of the fasteners into axial alignment with the driver shaft for driving by the driver shaft, a lever having a first end coupled to the shuttle and a second end coupled to the housing whereby movement of the slide body axially relative the housing (a) towards the extended position moves the shuttle towards the axis and (b) away from the extended position moves the shuttle away from the axis, a bearing member on the slide body which engages the lever intermediate the first end and the second end of the lever when the slide body is proximate the extended postion such that when the slide body moves axially towards the extended position, the bearing member urges the lever to assist moving the shuttle towards the axis.
Claim 3
Dependent Claim
23 words
An apparatus as claimed in claim 1 wherein the shuttle is slidably mounted to the slide body for sliding along a set pathway.
Claim 4
Dependent Claim
15 words
An apparatus as claimed in claim 2 wherein the shuttle slides along a linear beam.
Claim 5
Dependent Claim
22 words
An apparatus as claimed in claim 1 including a spring biasing the slide body forwardly relative the housing to the extended position.
Claim 6
Dependent Claim
20 words
An apparatus as claimed in claim 1 wherein the first end of the lever is pivotally connected to the shuttle.
Claim 7
Dependent Claim
20 words
An apparatus as claimed in claim 5 wherein the second end of the lever is pivotally connected to the housing.
Claim 8
Dependent Claim
46 words
An apparatus as claimed in claim 5 wherein the second end of the lever includes a lost motion slot, a pin is carried on the housing, the pin is slidable in the lost motion slot and the lever is pivotable about the pin relative the housing.
Claim 9
Dependent Claim
65 words
An apparatus as claimed in claim 2 wherein the pathway is disposed in a first plane, the first end of the lever is pivotally connected to the shuttle for pivoting relative the shuttle about an axis normal the first plane and the second end of the lever is pivotally connected to the housing for pivoting relative the housing about an axis normal the first plane.
Claim 10
Dependent Claim
80 words
An apparatus as claimed in claim 1 wherein the slide body is disposed radially about the drive shaft, the housing has a side wall disposed generally radially about the slide body, the side wall of the housing having an axially extending keyway radially through the side wall, the slide body having a key member extending radially outwardly therefrom slidably received in the keyway, the bearing member provided on the key member radially outwardly of the side wall of the housing.
Claim 11
Dependent Claim
44 words
An apparatus as claimed in claim 9 wherein the keyway and key member cooperate to limit sliding of the slide body and housing between the fully extended and fully retracted positions and prevent relative rotation of the slide body and housing about the axis.
Claim 12
Dependent Claim
101 words
An apparatus as claimed in claim 10 wherein the guide channel comprises a radial extension of the slide body, the shuttle carried on the radial extension on a first side of the apparatus, the first end of the lever coupled to the shuttle on the first side of the apparatus, the second end of the lever mounted to the housing on the first side of the apparatus, the lever in extending from its first end on the shuttle to its second end on the housing extends across the keyway axially forward of the bearing member for engagement by the bearing member.
Claim 13
Dependent Claim
49 words
An apparatus as claimed in claim 1 wherein the slide body having guide mechanism to locate successive of the screws advanced via the guide channel to be axially in alignment with the driver shaft for engagement in driving of the screws from the guide means by the driver shaft.
Claim 14
Dependent Claim
42 words
An apparatus as claimed in claim 1 including a return pawl to engage the screwstrip and prevent movement of the screwstrip in a direction opposite the direction in which the screwstrip is advanced and a release mechanism for releasing said return pawl.
Claim 15
Dependent Claim
39 words
An apparatus as claimed in claim 9 wherein a spring is disposed coaxially about the driver shaft engaging the housing at one end and the slide body at another end to urge the slide body to the extended position.
Claim 16
Dependent Claim
42 words
An apparatus as claimed in claim 7 wherein a pin is carried on the shuttle, the first end of the lever including a bore, the pin received in the bore such that the lever is pivotable about the pin relative the shuttle.
Claim 17
Dependent Claim
55 words
An apparatus as claimed in claim 1 wherein the slide body comprises a nose portion which is removable from a rear portion of the slide body carrying the bearing plate, the lever releaseably engageable with one of the shuttle and the housing for replacement of the removable nose portions with other similar removable nose portions.
Claim 18
Dependent Claim
29 words
An apparatus as claimed in claim 1 wherein the lever has an axially rearwardly directed cam surface for engagement by axially forwardly directed bearing surfaces of the bearing member.
Claim 19
Dependent Claim
49 words
An apparatus as claimed in claim 1 wherein with the slide body located relative the housing in a fully extended position, the bearing plate engages the lever to assist the shuttle in urging the screwstrip towards the axis to maintain a screw in axial alignment with the driver shaft.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2002-02-15 | 2002-08-17 | 2003-02-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2006-02-15 | 2006-08-17 | 2007-02-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2010-02-15 | 2010-08-17 | 2011-02-16 | $7700.00 | Window Closed / Lapsed |