Road structure – process – or apparatus – Pavement – Vault cover-closure
Patent
1992-12-31
1994-11-22
Buiz, Michael Powell
Road structure, process, or apparatus
Pavement
Vault cover-closure
52 20, 220325, 411 98, E02D 2914
Patent
active
053663179
ABSTRACT:
A manhole cover apparatus including a collar defining an opening with an inner perimeter is provided with a pivotally mounted cover having an outer perimeter greater than the inner perimeter of the collar. A seal is provided to seal between the cover and the collar. Closure structure is provided to secure the free end of the cover to the collar. A threaded bolt is provided to close the cover. A pivotally mounted lever arm is mounted to the bolt for turning of the bolt. An adjustable threaded hinge is provided to adjust the cover in a longitudinal direction relative to the collar. The manhole cover apparatus is useable on pressure containers, such as those used to pneumatically handle particulate material.
REFERENCES:
patent: 652487 (1900-06-01), Powers
patent: 1483953 (1922-11-01), Rainey
patent: 1520230 (1924-12-01), Flath
patent: 1534836 (1925-04-01), Brede et al.
patent: 2663213 (1950-10-01), Davidson
patent: 3666134 (1972-05-01), Rauch
patent: 3860142 (1975-01-01), Jurges
patent: 4807675 (1989-02-01), Sharp
patent: 4976576 (1990-12-01), Mahaney, Jr. et al.
patent: 5073259 (1991-12-01), Solimar
patent: 5304021 (1994-04-01), Oliver et al.
Modern Bulk Transporter, vol. 55, No. 6, cover page, pp. 4 and 11, dated Dec., 1992. (Exhibit A).
A Knappco document entitled "Knappco Is Progressive", two cover pages, pp. A-1 through 16, pp. B-1 through 50, pp. F-1 through 4, and a 16 page price list dated Jun. 1, 1990. (Exhibit B).
A Fort Vale Engineering Ltd. document entitled "Manlids", 44 pages, dated 1989. (Exhibit C).
A Perolo document entitled "Tank Containers Equipments", 1 page, with 8 page attachment entitled Manlids, dated Oct., 1989. (Exhibit D).
A Fruehauf document for a Manhole Assmelby 20" Full Opening, 2 pages, dated May, 1980. (Exhibit E).
A Knappco document entitled "KW 20" Full Opening High Pressure Manhole", 2 pages, dated Jan., 1987. (Exhibit F).
A Butler Manufacturing Company drawing dated Jun. 22, 1977. (Exhibit G).
A J & L Tank Company specification sheet, one page. (Exhibit H).
ISO Standard for Man-holes and Man-hole Lids for Tank Containers for Liquids and Pressurized Dry Bulk, 2 pages. (Exhibit I).
Buiz Michael Powell
O'Connor Pamela Anne
LandOfFree
Manhole cover apparatus and method does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Manhole cover apparatus and method, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Manhole cover apparatus and method will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1987372