US3815440A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Safety guard
Assignee: Individual
•
Filing: 1973-03-16
•
Granted: 1974-06-11
•
Expires: 1993-03-16
Abstract
Abstract A safety guard for preventing injury to personnel adjacent machinery such as a punch press. A plurality of horizontally extending safety panels are connected at their ends to a pair of lazy tong mechanisms to permit the guard to be swung upwardly to an open position and to be swung downwardly to a closed position to cover the area to be protected.
Inventors
- 👤 T Mikulin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 09:11
CPC Classifications
F; F16; F16P; F16P1/00; B; B23; B23Q; B23Q11/00; B23Q11/08; B23Q2011/0808; Y; Y10; Y10T; Y10T74/00; Y10T74/20; Y10T74/20576; Y10T74/20582; Y10T74/20588; Y10T74/20594; Y10T74/21; Y10T74/2193
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
198 words
A safety guard adapted to be positioned adjacent a machine Such as a punch press to protect personnel from injury, comprising: a pair of similar horizontally spaced apart parallel lazy tong mechanisms defining the vertically extending sides of said guard, an upper fixed support, means securing said mechanisms at their upper ends to said fixed support adjacent said machine, with the opposite lower ends free from engagement, a plurality of elongated parallel safety panels extending between and secured at their opposite ends to corresponding links of each of said mechanisms, a pair of terminal links rotatably supported at their corresponding inner ends to said support, one link of each pair of links of each mechanism adjacent said fixed support being pivotally secured to said support, the other link of each pair adjacent said fixed support being pivoted to the outer end of a terminal link, the inner end of each of said terminal links being rotatably mounted on said support, counterweight means operatively associated with said other end of said terminal link for applying a torque to said terminal link in the same direction as the direction of movement of said terminal link when said guard is raised.
Claim 2
Dependent Claim
198 words
A safety guard adapted to be positioned adjacent a machine Such as a punch press to protect personnel from injury, comprising: a pair of similar horizontally spaced apart parallel lazy tong mechanisms defining the vertically extending sides of said guard, an upper fixed support, means securing said mechanisms at their upper ends to said fixed support adjacent said machine, with the opposite lower ends free from engagement, a plurality of elongated parallel safety panels extending between and secured at their opposite ends to corresponding links of each of said mechanisms, a pair of terminal links rotatably supported at their corresponding inner ends to said support, one link of each pair of links of each mechanism adjacent said fixed support being pivotally secured to said support, the other link of each pair adjacent said fixed support being pivoted to the outer end of a terminal link, the inner end of each of said terminal links being rotatably mounted on said support, counterweight means operatively associated with said other end of said terminal link for applying a torque to said terminal link in the same direction as the direction of movement of said terminal link when said guard is raised.
Claim 3
Dependent Claim
66 words
A safety guard according to claim 1 wherein said one end of said terminal link is fixedly connected to a first gear, a second gear rotatably mounted on said support and in mesh with said first gear, a counterweight connected to said second gear to rotate the latter by gravity in a direction opposite to the direction of said terminal link when said guard is raised.
Claim 4
Dependent Claim
64 words
A safety guard according to claim 2 wherein a counterweight is provided at each side of said guard and a pair of first and second gears cooperate with each counterweight, a horizontally extending shaft rotatably supported at its opposite ends in said support and fixedly secured to the inner ends of said terminal links and to a first gear at each of its ends.
Claim 5
Dependent Claim
28 words
A safety guard according to claim 1 wherein a fixed stop is provided for engaging the lower end of the guard to prevent upward movement of the latter.
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) | 1977-06-10 | 1977-12-10 | 1978-06-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-06-10 | 1981-12-10 | 1982-06-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-06-10 | 1985-12-10 | 1986-06-11 | $7700.00 | Window Closed / Lapsed |