US4436374A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Forklift safety scope
Assignee: Individual
•
Filing: 1982-01-18
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Granted: 1984-03-13
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Expires: 2002-01-18
Abstract
Abstract A safety scope in combination with a forklift truck for improved front and rear viewing while the operator is seated in under normal working conditions. The safety scope comprises an elongated housing or viewing box mounted between two upright posts of the forklift with periscopic mirrors in the box and two convex mirrors on the back side of the box near each end thereof. The improvement preferably includes resilient rubber mounting means to cushion the mounting of the box and mirrors.
Inventors
- 👤 Henry A. Krueger
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 04:14
CPC Classifications
B; B60; B60R; B60R1/00; B60R1/10
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
174 words
In a forklift truck having a front lift assembly including a frame with two vertical side posts projecting upwardly at the front end of the truck and a horizontal cross member joining the two posts at an elevated position which blocks the forward view of the truck operator during normal operating conditions, the improvement which comprises: periscope means including an elongated tubular housing arranged on the back side of said cross member, said housing having an upper portion rising above said cross member with a front transparent window and a lower portion located behind said cross member with a back transparent window, each window extending over most of the length of the housing, a paired set of periscopic mirrors mounted diagonally within said housing in substantially parallel facing relationship for periscopic viewing from the upper front window down to the lower back window; and two convex mirrors, each being mounted near the opposite ends of said housing on the back side of its upper portion for wide-angle viewing to the rear of the operator.
Claim 2
Dependent Claim
174 words
In a forklift truck having a front lift assembly including a frame with two vertical side posts projecting upwardly at the front end of the truck and a horizontal cross member joining the two posts at an elevated position which blocks the forward view of the truck operator during normal operating conditions, the improvement which comprises: periscope means including an elongated tubular housing arranged on the back side of said cross member, said housing having an upper portion rising above said cross member with a front transparent window and a lower portion located behind said cross member with a back transparent window, each window extending over most of the length of the housing, a paired set of periscopic mirrors mounted diagonally within said housing in substantially parallel facing relationship for periscopic viewing from the upper front window down to the lower back window; and two convex mirrors, each being mounted near the opposite ends of said housing on the back side of its upper portion for wide-angle viewing to the rear of the operator.
Claim 3
Dependent Claim
32 words
The improvement in a forklift truck as claimed in claim 1 which further comprises at least one shock-absorbing and vibration-damping means in the mounting of said periscope means and said convex mirrors.
Claim 4
Dependent Claim
34 words
The improvement in a forklift truck as claimed in claim 2 wherein the shock-absorbing and vibration-damping means includes at least one resilient rubber member arranged between said cross member and said elongated tubular housing.
Claim 5
Dependent Claim
29 words
The improvement in a forklift truck as claimed in claim 3 wherein said resilient rubber member is an elongated rubber block fastened between said cross member and said housing.
Claim 6
Dependent Claim
49 words
The improvement in a forklift truck as claimed in claim 2 wherein said elongated tubular housing is mounted by a clamping strap fastened around said cross member and said at least one shock-absorbing and vibration-damping means includes a resilient rubber insert between said clamping strap and said cross member.
Claim 7
Dependent Claim
54 words
The improvement in a forklift truck as claimed in claim 5 wherein said resilient rubber insert consists of one replaceable segment fitting between the back side of said cross member and a mounting bracket on said elongated tubular housing and another segment fitting between the strap and the remaining sides of said cross member.
Claim 8
Dependent Claim
40 words
The improvement in a forklift truck as claimed in either of claims 2 or 3 wherein the periscopic mirrors are mounted on diagonally positioned bracing members within said housing which also reinforce the upper and lower portions of said housing.
Claim 9
Dependent Claim
40 words
The improvement in a forklift truck as claimed in either of claims 2 or 3 wherein said periscopic mirrors and said convex mirrors are individually mounted onto the housing by mounting members which include an adherent, resilient, foam rubber insert.
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) | 1987-03-13 | 1987-09-12 | 1988-03-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-03-13 | 1991-09-12 | 1992-03-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-03-13 | 1995-09-12 | 1996-03-13 | $7700.00 | Window Closed / Lapsed |