Back to results
US 6,302,633 B1Granted
Multiple pitch threaded fastener apparatus
OwnerL. Richard Poeinventor
Life of this patent
Estimating the term…
Abstract
A fastener apparatus having a bolt member with a fast lead threaded portion, a barrel member with a fine lead threaded portion, a collar member interposed between the bolt and the barrel and including both fast lead and fine lead threads to mesh with the respective threads on the bolt and the barrel, and an actuator for coupling two of the three members together so that in one instance the fastener is drawn rapidly on fast lead threads through a significant distance and in the second instance the fastener is drawn together on fine lead threads providing additional mechanical advantage.
Claims42
Multiple pitch threaded fastener apparatus comprising:
- a collar member configured with a bore formed with internal collar threads of a first pitch, said first pitch being different from said second pitch and external threads of a second pitch;
- a bolt member formed with external threads meshed with said internal threads and including a shank configured with an actuating surface movable longitudinally along a predetermined path as said bolt is rotated relative to said collar, said bolt further including at least one release recess disposed along said actuating surface;
- a barrel formed with interior threads meshing with said external collar threads further including at least one latch slot;
- an actuating shoulder on one of said members and facing longitudinally in one direction for travel along a predetermined path as said bolt is rotated relative to said collar to advance thereinto;
- an actuator interposed between said bolt and barrel members, mounted on the other of said members and a keeper shiftable from a latching position engaging said latch slot inhibiting said collar from rotating relative to said barrel to an unlatching position disengaging said keeper from said slot to free said collar with said bolt for rotating relative to said barrel, said actuator further including a follower disposed in said predetermined path and engageable by said shoulder upon said bolt being rotated a selected distance into said collar to shift said keeper from said latching position to said unlatching position.
2 more elements
Multiple pitch threaded fastener apparatus comprising:
- a bolt configured with external threads having a first pitch and an actuating shoulder facing axially in one direction, said bolt including at least one radially outwardly opening nesting slot having a radially projecting nesting wall facing in one annular direction;
- a selector collar configured with a bore formed with internal threads engaging said external threads and external collar treads having a second pitch, said first pitch being different from said second pitch;
- a barrel including internal threads engaging said external collar threads, said barrel further including a latching slot defined by a pair of spaced apart transfer walls for travel axially past said shoulder as said bolt is screwed into said collar;
- an elongated actuator captivated in said collar and including on one extremity a keeper to be positioned in said latching slot to engage one of said transfer walls to keep said collar from rotating relative to said barrel and being selectively shiftable from said latching slot to a nesting position in said nesting slot to, upon further rotation of said bolt, cause said nesting wall to engage said keeper and cause said collar to rotate with said bolt, said actuator including a follower for, upon screwing of said bolt a predetermined distance into said collar, engaging said shoulder and being operative upon further screwing of said bolt into said collar to transfer said keeper from said latching slot to said nesting slot to keep said bolt from rotating relative to said collar.
1 more element
A threaded fastener comprising:
- a receiver including a barrel having a cylindrical inner bore formed with a fine lead thread having a predetermined first pitch and a latching slot, a thread selector configured with an outer diameter circumscribed by a threaded portion having a pitch equal to said first pitch, said thread selector further including an inner aperture formed with a circumferential thread having a fast lead pitch greater than said first pitch, a latching element nested partially within said thread selector and configured to be radially outwardly biased in a first position with a first portion disposed within said latching slot to inhibit rotation of said thread selector relative to said barrel;
- and
- a bolt having a bolt head and a shank including a threaded portion with a pitch equal to said inner aperture pitch of said thread selector and dimensioned to be received within said inner aperture, said bolt further configured with a notch and a shoulder for engaging said latching element and upon further rotation of said bolt actuating said latching element to withdraw from said latching slot to nest within said notch in said bolt wherein said thread selector may then be rotated relative to said barrel.
Multiple pitch threaded fastener apparatus comprising:
- a cylindrical barrel configured with a bore formed with internal threads of a predetermined first pitch;
- a cylindrical transfer member in said barrel and having external screw threads engaging said internal threads and formed with an inner bore configured with internal screw threads having a predetermined second pitch;
- a bolt including external threads engaging said internal screw threads and an axially facing actuating shoulder;
- and
- a radially projecting shift member interposed between said transfer member and said barrel and constructed to assume a first latching position to inhibit rotation of said transfer member relative to said barrel and arranged to, upon screwing of said bolt in one direction a selected distance be engaged by said actuating shoulder to be shifted to a second unlatched position coupling said bolt with said transfer member to upon further screwing of said bolt in said one direction, rotate said transfer member with said bolt relative to said barrel.
2 more elements
Dependencies are inferred from the claim text.