Patent US3596554A successfully refreshed from Google Patents.
US3596554A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Safety-type locking pin
Assignee: National Aeronautics and Space Administration
•
Filing: 1970-05-19
•
Granted: 1971-08-03
•
Expires: 1990-05-19
Abstract
Abstract A safety-type locking pin for joining two load-carrying members and including means for preventing removal of the pin unless the pin is free of load. A slidable plunger moves between a locked and unlocked position of the pin by plunger actuation of detent balls. The plunger is spring-urged toward the locked position. A handle on the end of the pin opposite the detent balls is slidable against a spring to a position that interferes with the plunger being maintained in the unlocked position that is necessary to remove the pin. However, if the pin is free of load, and thus withdraws easily from the joined members, the pin will withdraw from the members and the handle will not shift to the interferring position.
Inventors
- 👤 Ture E Othman
- 👤 Ervin P Nelson
- 👤 Lawrence J Zmuda
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 22:26
CPC Classifications
F; F16; F16B; F16B21/00; F16B21/10; F16B21/16; F16B21/165; Y; Y10; Y10T; Y10T24/00; Y10T24/42
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
172 words
A safety-type locking pin for locking together a plurality of members having aligned holes therein comprising: a. a longitudinal sleeve adapted to be inserted in said aligned holes in said members; b. a plunger disposed in said sleeve and being slidable longitudinally of said sleeve; c. locking means carried by said sleeve and adapted for engaging one of said members and preventing withdrawal of said sleeve from said members; d. said locking means being movable in response to a sliding motion of said plunger between a locked and unlocked position; e. a handle carried by said sleeve on an end thereof remote from said locking means and being slidable longitudinally of said sleeve; f. resilient means for transferring longitudinally directed force between said handle and said sleeve; g. said plunger being spring-urged toward the locked position of said locking means; h. said handle being movable against said resilient means to a position whereby a portion of said handle prevents said plunger from being moved to the unlocked position of said locking means.
Claim 2
Dependent Claim
172 words
A safety-type locking pin for locking together a plurality of members having aligned holes therein comprising: a. a longitudinal sleeve adapted to be inserted in said aligned holes in said members; b. a plunger disposed in said sleeve and being slidable longitudinally of said sleeve; c. locking means carried by said sleeve and adapted for engaging one of said members and preventing withdrawal of said sleeve from said members; d. said locking means being movable in response to a sliding motion of said plunger between a locked and unlocked position; e. a handle carried by said sleeve on an end thereof remote from said locking means and being slidable longitudinally of said sleeve; f. resilient means for transferring longitudinally directed force between said handle and said sleeve; g. said plunger being spring-urged toward the locked position of said locking means; h. said handle being movable against said resilient means to a position whereby a portion of said handle prevents said plunger from being moved to the unlocked position of said locking means.
Claim 3
Dependent Claim
60 words
The invention as defined in claim 1 wherein said locking means comprises a plurality of apertures in the wall of said sleeve, a detent ball mounted in each of said apertures for projection and retraction laterally of said sleeve, a groove in said plunger for receiving said balls when said plunger is in said unlocked position of said locking means.
Claim 4
Dependent Claim
33 words
The invention as defined in claim 1 wherein said handle has an opening therethrough, said plunger extending through said opening, said end of said sleeve being disposed in said opening of said handle.
Claim 5
Dependent Claim
28 words
The invention as defined in claim 1 wherein said resilient means comprises a compression spring bearing on a portion of said handle and a portion of said sleeve.
Claim 6
Dependent Claim
37 words
The invention as defined in claim 1 wherein said plunger is spring-urged toward the locked position of said locking means by a compression spring bearing on a portion of said handle and a portion of said plunger.
Claim 7
Dependent Claim
37 words
The invention as defined in claim 1 wherein the end of said plunger opposite said handle projects beyond the corresponding end of said sleeve and is enlarged to a diameter exceeding the internal diameter of said sleeve.
Claim 8
Dependent Claim
20 words
The invention as defined in claim 1 wherein said handle, said plunger and said sleeve have a common longitudinal axis.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-08-02 | 1975-02-01 | 1975-08-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-08-02 | 1979-02-01 | 1979-08-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-08-02 | 1983-02-01 | 1983-08-03 | $7700.00 | Window Closed / Lapsed |