Back to results
US 5,211,701 AGranted
Rapid change drill bit system
OwnerAttila Csabafyinventor
Life of this patent
Estimating the term…
Abstract
An exchangeable-size tool system uses a tool holder which can reside in a drive motor chuck. Each of the various sizes or type of tool has the same shank size for mounting within the holder. A given tool size is popped into the holder. It is removed by manually pressing a small locking pin on the side of the holder and then pulling out the shank. The important features of the system are the ease of manufacturing and the precision of the holding of the tool.
Claims2
A system of parts including various interchangeable sizes and shapes of one component part of the system, these interchangeable, functional component parts hereafter referred to as IFCP, comprising:
- a holder for the IFCP, the holder containing a cavity to receive the IFCP, the cavity having a bottom surface, the surface having a raised portion on its surface across the width of the cavity, each IFCP having a functional portion and an installation portion, the shape of the installation portion being identical for all IFCP's, the installation portion fitting into the cavity portion of the holder, the IFCP containing a groove across its width on the end of its installation portion, the groove fitting exactly with the raised portion on the holder, the mating of the groove and raised portions preventing rotation between the holder and the IFCP, the mating providing a means of transmitting torque from the holder to the IFCP,
- the IFCP containing a peripheral groove, the peripheral groove being located on the IFCP so that said peripheral groove is immersed within the cavity of the holder when the IFCP and the holder are joined, the holder containing an opening on its side leading through its wall to the cavity, the opening located in line with the IFCP peripheral groove when the IFCP is joined to the holder, the holder having a depression in its outside surface centered in line with the opening on its side and displaced from said opening along the length of the holder away from where the IFCP enters the holder, the depression and the opening being connected by an open channel, the depth of the channel being less than the depth of the depression, the holder containing an "O" ring and "O" ring groove, the groove located between the opening and the depression, the holder being fitted within the channel on its exterior wall with a moveable locking pin, the pin being held in place within the groove by its lying under the "O" ring and perpendicular to it, the pin being "L" shaped, the long leg of the "L" being positioned within the groove and under the "O" ring, the short leg of the "L" protruding into the opening on the holder under pressure from the "O" ring to create the locking function holding the IFCP in the holder as the short leg resides within the peripheral groove on the IFCP, the short leg having a normal and an actuated position, the short leg in its normal position having its one end extend into the groove of the IFCP, the leg position within the groove preventing the IFCP from exiting the holder, actuation of the pin being effected by manually pressing the long leg of the pin downward into the depression on the side of the holder, the pin then rocking its long leg on the bottom of the groove between the opening for the short leg and the depression, and at the same time stretching the "O" ring, the pin in its actuated position having its protruding, short leg end outside the groove, the IFCP then being removable from the holder,
- the result being that the holder and any one of the set of individual, different items of the IFCP can readily be interchanged and joined.
A hingeless actuation pin as part of a larger device, the pin comprising:
- a pin groove in the device, the pin groove holding the actuation pin, the pin having a rocking leg and an actuation leg, one end of the pin groove opening into a depression in the device, the depression being larger and deeper than the groove, the rocking leg of the pin extending over and ending over the location of the depression, an "O" ring groove in the surface of the device, the "O" ring groove running perpendicular to the pin groove, the "O" ring groove located along the rocking leg of the pin a distance away from the location of the depression, an "O" ring within the groove, the stretching force of the "O" ring functioning to hold the rocking leg of the pin in its non-actuation position, the result being that actuation pressure on the rocking leg of the pin at a point above the location of the depression results in a rocking action of the pin as its end located over the depression lowers into the depression and its end opposite to that over the depression rises against the "O" ring, either end of the pin having an actuation leg extending into or above the device, movement of the actuation leg being the means of transmitting the actuation action.
Dependencies are inferred from the claim text.