Patent US3677591A successfully refreshed from Google Patents.
US3677591A
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US
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Emergency lock release
Assignee: Stanley Works
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Filing: 1970-12-23
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Granted: 1972-07-18
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Expires: 1990-12-23
Abstract
Abstract An emergency lock release for a door having a fixed outer handle and a latch releasing pushbutton mounted in the fixed handle on the outer side of a door, such as a bathroom door. The pushbutton is operatively coupled to a latch locking mechanism mounted on the inner side of a door and is provided with a recess for reception of a tool by means of which the pushbutton may be rotated to unlock the latch mechanism from the opposite or outer side of the door, when a person at the inner side becomes incapacitated or cannot otherwise unlock the door from the inner side thereof.
Inventors
- 👤 Russell W Waldo
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 23:07
CPC Classifications
E; E05; E05B; E05B65/00; E05B65/0035; Y; Y10; Y10S; Y10S292/00; Y10S292/37; Y10T; Y10T292/00; Y10T292/08; Y10T292/1043; Y10T292/1051; Y10T292/1052; Y10T292/1053; Y10T292/1059; Y10T292/106
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
230 words
An emergency lock release for a latch mechanism, said latch mechanism comprising, a latch movable between latched and unlatched positions and a locking element movable between latch locking and releasing positions, said latch mechanism having means for mounting the same on one side of the door; said lock release including, a handle member adapted to be fixedly mounted on the opposite side of the door and having a generally cylindrical opening therethrough, a push button, a sleeve member mounting said push button in said opening coaxially therewith for axial sliding movement toward and away from said latch mechanism and for rotary movements of said push button on its own axis when said handle member and latch mechanism are mounted in opposed operative relationship, and a stem connected to said push button for common movements therewith, said stem being engageable with the locking element for common movement therewith and responsive to movement of said push button in one direction to move the latch to its unlatched position, said sleeve and handle member having inter-engaging portions holding said sleeve against rotation in said opening, said push button being coaxially disposed in said sleeve for rotation relative thereto and having an outer end defining an opening for reception of a tool for imparting rotation to said push button and stem in a direction to move said locking element to its latch releasing position.
Claim 2
Dependent Claim
230 words
An emergency lock release for a latch mechanism, said latch mechanism comprising, a latch movable between latched and unlatched positions and a locking element movable between latch locking and releasing positions, said latch mechanism having means for mounting the same on one side of the door; said lock release including, a handle member adapted to be fixedly mounted on the opposite side of the door and having a generally cylindrical opening therethrough, a push button, a sleeve member mounting said push button in said opening coaxially therewith for axial sliding movement toward and away from said latch mechanism and for rotary movements of said push button on its own axis when said handle member and latch mechanism are mounted in opposed operative relationship, and a stem connected to said push button for common movements therewith, said stem being engageable with the locking element for common movement therewith and responsive to movement of said push button in one direction to move the latch to its unlatched position, said sleeve and handle member having inter-engaging portions holding said sleeve against rotation in said opening, said push button being coaxially disposed in said sleeve for rotation relative thereto and having an outer end defining an opening for reception of a tool for imparting rotation to said push button and stem in a direction to move said locking element to its latch releasing position.
Claim 3
Dependent Claim
111 words
The emergency lock release defined in claim 1 in which said sleeve member defines an axial opening therethrough, said opening including diametrically enlarged inner and outer end portions and an axial groove connecting said enlarged portions, said outer end of the pushbutton being diametrically enlarged and contained in said enlarged outer end of the opening, said pushbutton having radially outwardly projecting lugs movable through said axial groove when said pushbutton is inserted through said opening, and received in the enlarged inner end portion of said opening upon limited rotary movement of the pushbutton relative to said sleeve member to limit axially outward movement of the pushbutton relative to the sleeve member.
Claim 4
Dependent Claim
24 words
The emergency lock release defined in claim 1 in which said sleeve has an outer end coplanar with the outer end of said pushbutton.
References Cited (Backward Citations)
US3121319A
Cited
US3364706A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-07-18 | 1976-01-17 | 1976-07-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-07-18 | 1980-01-17 | 1980-07-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-07-18 | 1984-01-17 | 1984-07-18 | $7700.00 | Window Closed / Lapsed |