초록 ▼

An enhanced security manhole cover is disclosed, comprising a frame, outer cover, inner cover, crossbar, saddle, eyebolt, and padlock. The inner cover, which closes the lower opening in a manhole, includes a detent in the top surface for receiving the eyebolt. The crossbar is positioned above the i

An enhanced security manhole cover is disclosed, comprising a frame, outer cover, inner cover, crossbar, saddle, eyebolt, and padlock. The inner cover, which closes the lower opening in a manhole, includes a detent in the top surface for receiving the eyebolt. The crossbar is positioned above the inner cover and engages the walls of the frame. The crossbar includes a threaded hole that aligns with the detent. The saddle, an upside down U-shaped member, is positioned over the crossbar and includes a slot for the eyebolt to partially extend through. The saddle may include a shoulder on the base, to protect the eyebolt. The eyebolt passes partially through the saddle and crossbar and threads into the bore. The shackle of the padlock passes through holes in the upright of the U-shaped saddle below the crossbar, locking the saddle in place. The upper cover closes the top of the frame.

대표청구항 ▼

What is claimed is: 1. A secure manhole accessway, comprising: a) a padlock, the padlock comprising a shackle, a lock, and a body; b) a manhole cover frame, the manhole cover frame having a peripheral wall, a top opening, and a bottom opening; c) an outer cover, the outer cover removably abutting t

What is claimed is: 1. A secure manhole accessway, comprising: a) a padlock, the padlock comprising a shackle, a lock, and a body; b) a manhole cover frame, the manhole cover frame having a peripheral wall, a top opening, and a bottom opening; c) an outer cover, the outer cover removably abutting the peripheral wall of the manhole cover frame and configured to cover the top opening; d) an inner cover, the inner cover having a top surface, the inner cover removably abutting the peripheral wall along the bottom opening in the manhole cover frame and configured to cover the bottom opening, the inner cover further comprising a detent in the top surface; e) a crossbar, the crossbar having a first end and a second end separated a distance from the first end, the first end and second end removably engaging the peripheral wall of the manhole cover frame, and the crossbar further comprising a threaded bore extending through the crossbar and aligned with the detent in the top surface of the inner cover; f) a saddle, the saddle having U-shape comprising a base and two upright sections, the saddle further comprising an oblong via extending through the base of the U and at least one via extending through each of the upright sections of the U-shaped saddle, the vias in the upright sections aligned, allowing the shackle of the padlock to pass therethrough and allowing the shackle to pass under the crossbar, and the base of the saddle removably positionable over the crossbar with the oblong via in the base aligned with the threaded bore in the crossbar; and g) an eyebolt, the eyebolt extending through the oblong via in the base of the saddle, and removably engaging the threaded bore in the crossbar, and further engaging the detent of the top surface of the inner cover. 2. The secure manhole accessway of claim 1, wherein the saddle further comprises a shoulder section around the via in the base of the saddle, and extending a distance from the base of the saddle in a direction opposite the two upright sections forming a Y-shaped member. 3. The secure manhole accessway of claim 2, further comprising at least one rib extending from the base of the saddle to the shoulder section around the via in the base of the saddle. 4. The secure manhole accessway of claim 3, wherein the manhole cover frame has an annular shape. 5. The secure manhole accessway of claim 4, further comprising a gasket between at least one of the outer cover and the manhole cover frame, and the inner cover and the manhole cover frame. 6. The secure manhole accessway of claim 4, wherein the padlock further comprises a tamper indicating device. 7. The secure manhole accessway of claim 1, wherein the manhole cover frame has an annular shape. 8. The secure manhole accessway of claim 1, further comprising a gasket between at least one of the outer cover and the manhole cover frame, and the inner cover and the manhole cover frame. 9. The secure manhole accessway of claim 1, wherein the padlock further comprises a tamper indicating device.