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US1969615A - Screw driver - Google Patents

Screw driver Download PDF

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Publication number
US1969615A
US1969615A US687489A US68748933A US1969615A US 1969615 A US1969615 A US 1969615A US 687489 A US687489 A US 687489A US 68748933 A US68748933 A US 68748933A US 1969615 A US1969615 A US 1969615A
Authority
US
United States
Prior art keywords
screw driver
bit
kerf
attachment
screw
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 - Lifetime
Application number
US687489A
Inventor
John J Kmet
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Individual filed Critical Individual
Priority to US687489A priority Critical patent/US1969615A/en
Application granted granted Critical
Publication of US1969615A publication Critical patent/US1969615A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B25HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25BTOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING OR HOLDING
    • B25B23/00Details of, or accessories for, spanners, wrenches, screwdrivers
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B25HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25BTOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING OR HOLDING
    • B25B23/00Details of, or accessories for, spanners, wrenches, screwdrivers
    • B25B23/02Arrangements for handling screws or nuts
    • B25B23/08Arrangements for handling screws or nuts for holding or positioning screw or nut prior to or during its rotation
    • B25B23/10Arrangements for handling screws or nuts for holding or positioning screw or nut prior to or during its rotation using mechanical gripping means
    • B25B23/105Arrangements for handling screws or nuts for holding or positioning screw or nut prior to or during its rotation using mechanical gripping means the gripping device being an integral part of the driving bit
    • B25B23/106Arrangements for handling screws or nuts for holding or positioning screw or nut prior to or during its rotation using mechanical gripping means the gripping device being an integral part of the driving bit the driving bit being a blade

Definitions

  • This invention relates to attachments for screw drivers and has for the primary object the provision of a device for tightly wedging the bit of a screw driver in the kerf of a screw to prevent slipping of the screw driver and the possibility of marring or injuring the walls of the kerf of the screw and is so mounted to the screw driver that it may be conveniently removed and replaced by another attachment of a different size so as to fit a kerf of a different size, thereby rendering a perfect connection between the screw driver and screws of different sizes or having kerfs of different sizes.
  • Figure l is a side elevation illustrating a screw driver with an attachment applied thereto and constructed in accordance with my invention.
  • Figure 2 is an edge elevation illustrating the attachment inserted in the kerf of a screw prior to moving the bit of the screw driver in the kerf.
  • Figure 3 is a fragmentary sectional view illustrating a means of retaining the attachment to the screw driver and showing the attachment in the kerf of a screw prior to the insertion of the bit of the screw driver into the kerf.
  • Figure 4 is a view similar to Figure 3 showing the attachment positioned in the kerf of the screw and wedged against the walls thereof by the bit of the screw driver entering the kerf.
  • Figure 5 is a fragmentary plan view showing the bit of the screw driver.
  • Figure 6 is a perspective view illustrating the attachment.
  • the numeral 1 indicates the handle of a screw driver carrying a shank 2 terminating in a bit 3.
  • the bit tapers towards its free end and has oppositely arranged sloping faces over which is positioned the attachment 4.
  • the shank 2 adjacent the bit 3 is provided with an opening 5 communicative with recesses 6 in opposite faces of the shank.
  • One wall of the opening forms abrupt shoulders 7 to be engaged by the attachment 4 and lying in close proximity to the recesses 6.
  • the attachment 4 consists of side plates 8 connected, as shown at 9.
  • the side plates are reduced to provide resilient gripping portions 10 having formed upon their opposing faces lugs 11 adapted to ride in the recesses 6 and engage the shoulders '7 during the use of the attachment on the screw driver.
  • the plates 8 converge, as shown in Figure 6, and contact with each other.
  • the attachment is applied to the screw driver, as shown in Figure 3, with the lugs 11 engaging the abrupt shoulders 7 and with the contacting ends of the plates 8 arranged beyond the end of the bit 3 so as to enter the kerf 12 of the screw prior to the bit.
  • the screw driver is forced towards the screw bringing the bit in the kerf and spreading the plates against opposite walls of the kerf, thereby effectively wedging the bit in the kerf obviating possibility of the bit slipping from the kerf during the turning of the screw by the screw driver in either direction.
  • the bit forces the plates 8 apart the lugs 11 ride against the walls of the recesses 6 away from the shoulders '7.
  • the lugs engaging the shoulders 7 prevent accidental removal of the attachment from the bit of the screw driver.
  • the flexible portions 10 are spread moving the lugs out of the path of the shoulders so that the attachment may be pulled off of the bit in an endwise direction.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Details Of Spanners, Wrenches, And Screw Drivers And Accessories (AREA)

Description

J. J. KMET SCREW DRIVER Aug. 7, 1 934.
Filed Aug. 30, 1955 Patented Aug. 7, 1934 UNITED STATES PATENT OFFICE 1 Claim.
This invention relates to attachments for screw drivers and has for the primary object the provision of a device for tightly wedging the bit of a screw driver in the kerf of a screw to prevent slipping of the screw driver and the possibility of marring or injuring the walls of the kerf of the screw and is so mounted to the screw driver that it may be conveniently removed and replaced by another attachment of a different size so as to fit a kerf of a different size, thereby rendering a perfect connection between the screw driver and screws of different sizes or having kerfs of different sizes.
With these and other objects in View this invention consists in certain novel features of construction, combination and arrangement of parts to be hereinafter more fully described and claimed.
For a complete understanding of my invention, reference is to be had to the following description and accompanying drawing, in which Figure l is a side elevation illustrating a screw driver with an attachment applied thereto and constructed in accordance with my invention.
Figure 2 is an edge elevation illustrating the attachment inserted in the kerf of a screw prior to moving the bit of the screw driver in the kerf.
Figure 3 is a fragmentary sectional view illustrating a means of retaining the attachment to the screw driver and showing the attachment in the kerf of a screw prior to the insertion of the bit of the screw driver into the kerf.
Figure 4 is a view similar to Figure 3 showing the attachment positioned in the kerf of the screw and wedged against the walls thereof by the bit of the screw driver entering the kerf.
Figure 5 is a fragmentary plan view showing the bit of the screw driver.
Figure 6 is a perspective view illustrating the attachment.
Referring in detail to the drawing, the numeral 1 indicates the handle of a screw driver carrying a shank 2 terminating in a bit 3. The bit tapers towards its free end and has oppositely arranged sloping faces over which is positioned the attachment 4. The shank 2 adjacent the bit 3 is provided with an opening 5 communicative with recesses 6 in opposite faces of the shank. One wall of the opening forms abrupt shoulders 7 to be engaged by the attachment 4 and lying in close proximity to the recesses 6.
The attachment 4 consists of side plates 8 connected, as shown at 9. The side plates are reduced to provide resilient gripping portions 10 having formed upon their opposing faces lugs 11 adapted to ride in the recesses 6 and engage the shoulders '7 during the use of the attachment on the screw driver. The plates 8 converge, as shown in Figure 6, and contact with each other. The attachment is applied to the screw driver, as shown in Figure 3, with the lugs 11 engaging the abrupt shoulders 7 and with the contacting ends of the plates 8 arranged beyond the end of the bit 3 so as to enter the kerf 12 of the screw prior to the bit. After the positioning of the plates 8 in the kerf 12, the screw driver is forced towards the screw bringing the bit in the kerf and spreading the plates against opposite walls of the kerf, thereby effectively wedging the bit in the kerf obviating possibility of the bit slipping from the kerf during the turning of the screw by the screw driver in either direction. When the bit forces the plates 8 apart the lugs 11 ride against the walls of the recesses 6 away from the shoulders '7. The lugs engaging the shoulders 7 prevent accidental removal of the attachment from the bit of the screw driver. However, when it is desired to change the attachment for another of a different size the flexible portions 10 are spread moving the lugs out of the path of the shoulders so that the attachment may be pulled off of the bit in an endwise direction.
While I have shown and described the preferred embodiment of my invention, it will be understood that minor changes in construction, combination and arrangement of parts may be made without departing from the spirit and scope of my invention, as claimed.
Having described the invention, I claim:
In combination with a screw driver bit provided with oppositely arranged tapered faces and an opening extending through said faces and forming a shoulder to each face, anda sloping Wall opposite to said shoulder, plates slidably engaging the faces, members connecting said plates with the latter projecting beyond the ends of said members to provide pairs of resilient portions, and tapering lugs formed on a pair of said resilient portions to ride against the sloping walls and r to engage with the shoulders.
JOHN J. KMET.
US687489A 1933-08-30 1933-08-30 Screw driver Expired - Lifetime US1969615A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
US687489A US1969615A (en) 1933-08-30 1933-08-30 Screw driver

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US687489A US1969615A (en) 1933-08-30 1933-08-30 Screw driver

Publications (1)

Publication Number Publication Date
US1969615A true US1969615A (en) 1934-08-07

Family

ID=24760627

Family Applications (1)

Application Number Title Priority Date Filing Date
US687489A Expired - Lifetime US1969615A (en) 1933-08-30 1933-08-30 Screw driver

Country Status (1)

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US (1) US1969615A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2657724A (en) * 1951-02-10 1953-11-03 Keller Tool Co Expanding bit screw driver
US6904836B1 (en) * 2002-02-01 2005-06-14 Petru Andrei Screw holding screwdriver adapter

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2657724A (en) * 1951-02-10 1953-11-03 Keller Tool Co Expanding bit screw driver
US6904836B1 (en) * 2002-02-01 2005-06-14 Petru Andrei Screw holding screwdriver adapter

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