US3575482A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Self-adjusting positive locking chassis latch
Assignee: Rexnord Inc
•
Filing: 1969-06-05
•
Granted: 1971-04-20
•
Expires: 1989-06-05
Abstract
Abstract A self-adjusting positive locking chassis latch for securely retaining a chassis in housed position in a rack in which a handle assembly on the chassis comprises a primary lever pivotally supported for movement from a release position to a home position in the course of which movement a hook on the primary lever engages a spring-loaded keeper pin to move the chassis home with a controlled locking force and to displace the keeper pin sufficiently relative to the keeper housing to accommodate any interference between the chassis and the rack. A secondary lever is adapted to be moved from a release position to a locking position to move a locking element to a position at which it positively locks interengageable elements, carried respectively by the keeper pin and the keeper housing, in engaged position. A releasable catch arrangement adapted to hold the primary and secondary levers in their home and locking positions prevents the secondary lever from being latched unless the primary lever is already in its home position.
Inventors
- 👤 Edward Macmaster
- 👤 Werner Dellith
- 👤 John L Vander Sande
- 👤 Paul R Gley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 21:10
CPC Classifications
H; H01; H01R; H01R13/00; H01R13/62; H05; H05K; H05K7/00; H05K7/14; H05K7/1401; H05K7/1411
Claims Analysis
Total Claims: 23
Claim 1
Independent Claim
132 words
A latch assembly for securing body in a home position on a support including in combination, first interengageable means on said body and on said support for moving said body into said home position, said first interengageable means comprising a springloaded keeper and a latching member mounted for movement between a release position out of engagement with said keeper and a latching position in engagement with said keeper at which said body is in said home position, second interengageable means on said body and on said support mounted for movement between release positions and engaged positions and means responsive to movement of said second interengageable means from said release positions to said engaged positions for positively locking said keeper in the position which it occupies following operation of said first interengageable means.
Claim 2
Dependent Claim
132 words
A latch assembly for securing body in a home position on a support including in combination, first interengageable means on said body and on said support for moving said body into said home position, said first interengageable means comprising a springloaded keeper and a latching member mounted for movement between a release position out of engagement with said keeper and a latching position in engagement with said keeper at which said body is in said home position, second interengageable means on said body and on said support mounted for movement between release positions and engaged positions and means responsive to movement of said second interengageable means from said release positions to said engaged positions for positively locking said keeper in the position which it occupies following operation of said first interengageable means.
Claim 3
Dependent Claim
19 words
A latch assembly as in claim 1 including means for releasably retaining said latching member in its latching position.
Claim 4
Dependent Claim
31 words
A latch assembly as in claim including common means for releasably retaining said latching member in locking position and for releasably retaining said second interengageable means in engagement with the support.
Claim 5
Dependent Claim
39 words
A latch assembly as in claim 1 including a housing mounting said keeper for sliding movement and a spring carried by said housing for urging said keeper to move in a direction toward the home position of said body.
Claim 6
Dependent Claim
149 words
A latch assembly for securing a body in a home position on a support including in combination, a housing on said support, a keeper mounted for sliding movement on said housing, a spring normally urging said keeper in a direction toward the home position of said body, a primary lever mounted for movement on said body between a release position and a latching position, interengageable actuating means on said primary lever and on said keeper for moving said body into said home position in response to movement of said primary lever from said release position to said latching position, interengageable locking means carried by said housing and by said keeper, a secondary lever mounted on said body for movement from a release position to a locking position and means responsive to movement of said secondary lever to its locking position for retaining said interengageable locking means in locked position.
Claim 7
Dependent Claim
149 words
A latch assembly for securing a body in a home position on a support including in combination, a housing on said support, a keeper mounted for sliding movement on said housing, a spring normally urging said keeper in a direction toward the home position of said body, a primary lever mounted for movement on said body between a release position and a latching position, interengageable actuating means on said primary lever and on said keeper for moving said body into said home position in response to movement of said primary lever from said release position to said latching position, interengageable locking means carried by said housing and by said keeper, a secondary lever mounted on said body for movement from a release position to a locking position and means responsive to movement of said secondary lever to its locking position for retaining said interengageable locking means in locked position.
Claim 8
Dependent Claim
30 words
An assembly as in claim 5 in which said housing is formed with a bore, said interengageable locking means comprising friction spring fingers on said keeper located in said bore.
Claim 9
Dependent Claim
71 words
An assembly as in claim 5 in which said housing is formed with a bore and in which interengageable locking means comprise spring fingers carried by said keeper in said bore, serrations on said fingers and serrations in said housing bore for engagement by said finger serrations and in which said means foR locking said interengageable locking means comprises means for camming said finger serrations into engagement with said bore serrations.
Claim 10
Dependent Claim
55 words
An assembly as in claim 5 in which said housing is formed with a bore and in which said interengageable locking means comprise friction fingers carried by said keeper within said bore and in which said means for locking said interengageable locking means comprises means for camming said friction fingers into engagement with said bore.
Claim 11
Dependent Claim
55 words
An assembly as in claim 5 in which said housing is formed with a bore and in which said interengageable locking means comprise a rolling element supported by said keeper in said bore, and in which said means for locking said interengageable locking means comprises means for wedging said element into engagement with said bore.
Claim 12
Dependent Claim
31 words
An assembly as in claim 5 including a common catch for releasably holding said primary lever in its locking position and for releasably holding said secondary lever in its locking position.
Claim 13
Dependent Claim
85 words
An assembly as in claim 5 including a catch, means mounting said catch on said body for movement between released and operative positions, first interengageable means on said catch and on said primary lever for holding said primary lever in latching position, second interengageable means on said secondary lever and on said catch for holding said secondary lever in locking position, said first interengageable means comprising means for preventing engagement of said second interengageable means until said primary lever is fully in said latching position.
Claim 14
Dependent Claim
64 words
An assembly as in claim 5 in which said housing is formed with a bore, said interengageable locking means comprising elements carried for movement with said keeper in said bore, and in which said means for locking said locking means comprises a rod slidable in said housing and a cam carried by said rod for camming said elements toward the wall of said bore.
Claim 15
Dependent Claim
25 words
An assembly as in claim 5 including means for restraining said keeper and said housing against relative movement in the home position of said keeper.
Claim 16
Dependent Claim
34 words
An assembly as in claim 5 in which said interengageable locking means comprise resilient fingers carried by said keeper, serrations on said fingers and serrations on said housing for engagement by said finger serrations.
Claim 17
Dependent Claim
26 words
An assembly as in claim 14 in which said locking means comprise a separate bushing in said housing, said housing serrations being formed on said bushing.
Claim 18
Dependent Claim
214 words
A latch assembly for securing a body in a home position on a support including in combination, a housing on said support, a keeper slidably supported on said housing, a spring for biasing said keeper in a direction toward the home position of said body, said housing being formed with a bore, lockable elements carried by said keeper in said bore, a locking rod, a cam on said rod, means mounting said rod on said housing for movement between a release position and a locking position at which said cam moves said locking elements into engagement with the wall of said bore, means biasing said rod toward said release position, a primary lever, means mounting said primary lever on said body for movement between a release position and a latching position, interengageable means on said primary lever and on said keeper for moving said body to its home position in response to movement of said primary lever to its latching position, a secondary lever, means mounting said secondary lever on said body for movement from a release position to a locking position, and interengageable means on said secondary lever and on said locking rod for moving said rod to its locking position in response to movement of said secondary lever to its locking position.
Claim 19
Dependent Claim
214 words
A latch assembly for securing a body in a home position on a support including in combination, a housing on said support, a keeper slidably supported on said housing, a spring for biasing said keeper in a direction toward the home position of said body, said housing being formed with a bore, lockable elements carried by said keeper in said bore, a locking rod, a cam on said rod, means mounting said rod on said housing for movement between a release position and a locking position at which said cam moves said locking elements into engagement with the wall of said bore, means biasing said rod toward said release position, a primary lever, means mounting said primary lever on said body for movement between a release position and a latching position, interengageable means on said primary lever and on said keeper for moving said body to its home position in response to movement of said primary lever to its latching position, a secondary lever, means mounting said secondary lever on said body for movement from a release position to a locking position, and interengageable means on said secondary lever and on said locking rod for moving said rod to its locking position in response to movement of said secondary lever to its locking position.
Claim 20
Dependent Claim
36 words
An assembly as in claim 16 in which said cam is mounted for sliding movement on said locking rod, a stop on said rod and a spring for biasing said cam into engagement with said stop.
Claim 21
Dependent Claim
88 words
An assembly as in claim 16 including a catch, means mounting said catch on said body fOr movement between released and operative positions, first auxiliary interengageable means on said catch and on said primary lever for holding said primary lever in latching position, second auxiliary interengageable means on said catch and on said secondary lever for holding said secondary lever in locking position, said first auxiliary interengageable means comprising means for preventing engagement of said second interengageable means until said primary lever is fully in said latching position.
Claim 22
Dependent Claim
125 words
A latch assembly for a reciprocable member including in combination a support for the reciprocable member, a keeper, means carried by the support for floatingly mounting said keeper, said mounting means including biasing means for biasing said keeper to move said reciprocable member toward a home position, a latching lever pivotally mounted on said reciprocable member, one end of said lever provided with means for engaging said keeper whereby pivotal movement of said lever will move said reciprocable member toward home position, means for retaining said latching lever in the home position of said reciprocable member, means for immobilizing said keeper after movement of said latching lever to home position, and means carried by said reciprocable member for retaining said immobilizing means in keeper-immobilizing position.
Claim 23
Dependent Claim
125 words
A latch assembly for a reciprocable member including in combination a support for the reciprocable member, a keeper, means carried by the support for floatingly mounting said keeper, said mounting means including biasing means for biasing said keeper to move said reciprocable member toward a home position, a latching lever pivotally mounted on said reciprocable member, one end of said lever provided with means for engaging said keeper whereby pivotal movement of said lever will move said reciprocable member toward home position, means for retaining said latching lever in the home position of said reciprocable member, means for immobilizing said keeper after movement of said latching lever to home position, and means carried by said reciprocable member for retaining said immobilizing means in keeper-immobilizing position.
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) | 1974-04-19 | 1974-10-19 | 1975-04-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-04-19 | 1978-10-19 | 1979-04-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-04-19 | 1982-10-19 | 1983-04-20 | $7700.00 | Window Closed / Lapsed |